OPCE-STR.vp Social news U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:14 Color profile: Disabled Composite 150 lpi at 45 degrees U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:14 Color profile: Disabled Composite 150 lpi at 45 degrees Professor Nikola Ljube{i} – on the occasion of his seventieth birthday Professor Nikola Ljube{i} was born on May 18, 1940, in Komarevo near Sisak. He attended el- ementary school in Cepeli{te and Petrinja and completed high school in Sisak. He enrolled in the study of biology at the Faculty of Science of Uni- versity of Zagreb and obtained a BSc Degree in 1964. At the same Faculty, he enrolled in the post- graduate biology programme in the field of experi- mental biology. In 1966, he earned his MSc De- gree and, in 1971, he defended his PhD thesis. In 1964, Professor Ljube{i} joined the Labora- tory for Electron Microscopy at the Ru|er Bo{kovi} Institute (RBI) where he spent his entire carrier. In 1974, he acquired the title of research associate and continued his career path by becoming higher research associate in 1980, followed by the title of senior scientist in 2001. Over the years, he carried out a number of duties at RBI: he was the Head of the Laboratory for Electron Microscopy, and served, in several mandates, as the Head of the Division of Organic Chemistry and Biochemistry, and afterwards of the Division of Molecular Genetics. Also, for a number of years he was appointed a member of the RBI’s Executive Board. In 1973, and again from 1986 till 1988, Professor Ljube{i} continued his scientific spe- cialization in the laboratory of Prof. Eberhardt Schnepf at the Department for Cellular Biol- ogy (Lehrstuhl für Zellenlehre), University of Heidelberg, Germany. For his professional achievements and endeavors in the popularization of science Pro- fessor Ljube{i} received several awards. In 1986 he was awarded the »Narodna tehnika« Republic’s Prize. For his dedicated work on the investigation of plastids, he won in 1998, together with Professor Mercedes Wrischer, the Croatian Academy of Sciences and Arts (HAZU) Prize. In 2005, Professor Ljube{i} received the Annual State Prize for Populariza- tion and Promotion of Science (in the field of natural sciences). In 2006, he was elected an associate member of Croatian Academy of Sciences and Arts. Professor Nikola Ljube{i} is the author or co-author of 112 scientific papers, and the co-author of one University textbook. During his scientific career, his interest was primar- ily focused on the structure and function of plastids, plant organelles with versatile mor- phology and functions. In his research, he placed special emphasis on electron-microscopic investigations of the conversions between various plastid types. He initiated his career with investigations on ultrastructural changes occurring in plastids during yellowing (senes- cence) and subsequent regreening of tobacco leaves, in which he particularly followed the ACTA BOT. CROAT. 69 (2), 2010 301 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees processes of thylakoid degradation and reconstitution as well as morphology of plasto- globules. These investigations became the main part of his MSc Thesis entitled »A contri- bution to understanding the submicroscopical structure of chloroplasts«. Later on, in his doctoral thesis entitled »Transformations of plastids in the subepidermis of the fruits in the genus Cucurbita«, he described the processes of plastid conversion during growth, ripen- ing and decay of pumpkin fruits. These investigations revealed immense ultrastructural variability in chromoplasts found in fruits of varieties of Cucurbita pepo and Cucurbita maxima. Especially intriguing was the discovery of the regreening of mature fruits, more specifically, the possibility of re-building the thylakoid system in photosynthetically inac- tive chromoplasts. His fascination with chromoplasts in pumpkin fruits led to further ex- tensive research on chromoplasts found in flowers and fruits of different species. Espe- cially interesting were chromoplasts in the flowers of Hypericum perforatum, Thunbergia alata and Liriodendron tulipifera, as well as in the fruit and sepals of Physalis alkekengi and the fruit of Solanum capsicastrum. These studies not only demonstrated the amazing morphological diversity of chromoplasts in different plant species, but also showed that ultrastructurally distinct chromoplasts can be found in different tissues of the same part of the plant, as exemplified by the flowers of Thunbergia alata. His studies of chromoplasts showed not only their fascinating morphology, but also their complex biogenesis. In his ef- forts to elucidate the mechanisms underlying formation of different chromoplast substruc- tures, especially important were his studies on different herbicides influencing carotenoid biosynthesis. These studies showed a strong connection between the amount and composi- tion of carotenoids and the formation of the particular carotenoid-containing structure. Apart from chromoplasts, a significant part of the scientific interest of Professor Ljube{i} was dedicated to chloroplasts found in different 'Aurea' plant varieties (such as Zelkova serrata 'Aurea' and Euonymus japonicus 'Aureomarginatus'), in which leaves exposed to high-light intensities turn golden-yellow. These investigations led to the detailed descrip- tions of the processes involved in the disassembly of the photosynthetic apparatus during leaf yellowing, as well as the processes of thylakoid system reassembly, which can occur if such yellowed leaves are exposed to low light conditions. In more than 45 years of dedicated scientific investigation using electron microscopy led to Professor Ljube{i} becoming widely known as an expert in the field of plant cell ultrastructure. Moreover, with his exceptional knowledge and expertise in microscopy, he has been a collaborater in solving many scientific problems of his fellow biologists, as well as other scientists, notably biomedical researchers and chemists with whom he established long and fruitful collaborations. He has also restlessly catalyzed the connectivity of elec- tron microscopists from different fields and institutions, thus immensely contributing to the development of electron microscopy in Croatia. Professor Ljube{i} contributed significantly to publishing of the most significant Cro- atian scientific biological journals, »Periodicum biologorum« and »Acta Botanica Cro- atica«, either by his regular submissions of scientific papers, or by being a member of the Editorial Boards for a number of years. In »Priroda«, the oldest Croatian journal for the popularization of science, he was a member of the Editorial Board for more than ten years, and also acted as the Editor in Chief. Along with his work in science, for a number of years he was involved in education, en- thusiastically sharing his broad knowledge and experience in microscopy and cell biology 302 ACTA BOT. CROAT. 69 (2), 2010 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees with generations of students. He participated in lecturing within the scope of graduate and post-graduate studies at the Faculty of Science (at which he taught as a full professor since 1997), Faculty of Pharmacy and Biochemistry, Faculty of Medicine, and Academy of Fine Arts of University of Zagreb, and at the Faculty of Education of J. J. Strossmayer Univer- sity of Osijek. He was also a supervisor of a number of BSc, MSc and PhD thesis. Professor Nikola Ljube{i} was, and still is, exceptionally active in a number of profes- sional societies. In the Croatian Natural Sciences Society (HPD) he performed many du- ties, while in one mandate he was its president. He was one of the founders of the Croatian Society for Plant Biology and of the Croatian Biological Society (HBD), in the latter being awarded the »Zdravo Lorkovi}« Plaque for exceptional contribution to the work of the So- ciety. Professor Ljube{i} was also one of the founders of the Section for Electron Micros- copy within the HPD which later developed into the Croatian Society for Electron Micros- copy and finally Croatian Microscopy Society. He has also greatly contributed to the work of »Matica Hrvatska«, in which he was the founder of a Division for Technical Culture and Division for Natural Sciences and Mathematics. Professor Ljube{i} was also the president of the 7th Croatian Biological Congress, one of the organizers of a Symposium dedicated to Zdravko Lorkovi}, as well as two interna- tional scientific meetings, numerous professional and scientific conventions, and a number of professional excursions. In more than 45 years of fruitful work by Professor Ljube{i}, it is hard to distinguish scientific and professional achievements from his exceptional talent in the popularization of the natural sciences. In this respect, he was very fond of working with younger genera- tions. Already after completion of his studies, he became a member of the Committee for Biology within the Movement »Nauka mladima« that later developed into the association of young natural scientists – »Znanost mladima«. He was the leader of many summer schools for young biologists, with those organized on the Velebit mountain being particu- larly successful. Without exaggeration, today we can say that he was, and still is, the »spirit« of this Movement, and that he is well known as such even in the most remote cor- ners of Croatia. With the same passion and joy that he showed in the laboratory studying microscopic structures, Professor Ljube{i} also discovered nature in its »macroscopic« dimensions – as a passionate mountain climber conquering mountain tops, and also as an admirer of the stars in the night sky. He is a member of the Croatian Climbing Society, Croatian Astro- nomical Society, and was even the director of Zagreb’s observatory. Therefore, although Professor Ljube{i} is by vocation a biologist, it would be more correct to describe him as versatile natural scientist. Along with his many interests and duties, too many to mention, Professor Ljube{i} has always found time to patiently share his wide knowledge and experience with younger col- leagues but also to help and support them, as a mentor and as a colleague. He has always been able to bring the spirit of tolerance and optimism in the working environment, and his enthusiasm and friendliness has always been the source of a pleasant and constructive at- mosphere. All of his co-workers have unforgettable memories of excursions that he has or- ganized, and that have always been a very welcom break from the laboratory work. On behalf of all his colleagues, we wish Professor Nikola Ljube{i}, on the occasion of his 70th birthday, that he may continue to solve the »microscopically tiny« puzzles of nature ACTA BOT. CROAT. 69 (2), 2010 303 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees with the same curiosity and enthusiasm. Also, it is our special wish that he may enjoy many more beautiful moments discovering the splendors of nature by hiking on mountain trails and catching magnificent sights from mountain tops. TATJANA PREBEG, HRVOJE FULGOSI, MERCEDES WRISCHER Laboratory for Electron Microscopy, Division of Molecular Biology, Ru|er Bo{kovi} Institute, Bijeni~ka 54, HR-10000 Zagreb, Croatia Scientific papers: LJUBE[I], N., 1968: Feinbau der Chloroplasten während der Vergilbung und Wiederer- grünung der Blätter. Protoplasma 66, 369–379. LJUBE[I], N., 1969: Plastoglobuli kod vrste Chlorophytum comosum (Thumb.) Baker. Acta Botanica Croatica 28, 227–231. OBERMAN, B., LJUBE[I], N., 1969: Elektronsko-mikroskopska istra`ivanja melanoti~nog i amelanoti~nog melanoma hr~ka. Lije~ni~ki Vjesnik 91, 947–953. HIRTZLER, R., OBERMAN, B., KULI[, M., LJUBE[I], N., 1969: Acinuszelladenocarcinome der Speicheldrüsen. Archiv für Klinische und Experimentelle Ohren-, Nasen- und Kehlen- Heilkunde 195, 68–80. LJUBE[I], N., 1970: Fine structure of developing chromoplasts in outer yellow fruit parts of Cucurbita pepo cv. pyriformis. Acta Botanica Croatica 29, 51–56. LJUBE[I], N., 1970: Osmiophile Substanz in Blattzellen der Brombeere (Rubus fruticosus L. s.l.). Protoplasma 69, 49–59. OBERMAN, B., LJUBE[I], N., 1970: Elektronska mikroskopija adenoma jetre. Radovi Medicinskog fakulteta u Zagrebu 18, 515–521. [TEFANAC, Z., LJUBE[I], N., 1971: Inclusion bodies in cells infected with radish mosaic vi- rus. Journal of General Virology 13, 51–57. OBERMAN, B., LJUBE[I], N., 1971: Elektronsko mikroskopska istra`ivanja lejomioma ezofagusa. Lije~ni~ki Vjesnik 93, 761–766. DEVIDÉ, Z., LJUBE[I], N., 1972: Plastid transformations in pumpkin fruits. Naturwissen- schaften 59, 39–40. LJUBE[I], N., 1972: Ultrastructural changes of plastids during the yellowing of the fruit of Cucurbita pepo var. pyriformis. Acta Botanica Croatica 31, 47–53. LJUBE[I], N., 1973: Transformation of plastids in white pumpkin fruit. Acta Botanica Croatica 32, 59–62. DEVIDÉ, Z., LJUBE[I], N., 1974: The reversion of chromoplasts to chloroplasts in pumpkin fruits. Zeitschrift für Pflanzenphysiologie 73, 296–306. BUTURAC, I., [ARI], A., LJUBE[I], N., 1974: Nalaz virusa mozaika celera u Jugoslaviji. Acta Botanica Croatica 33, 37–44. [TEFANAC, Z., LJUBE[I], N., 1974: The spindle-shaped inclusion bodies of narcissus mo- saic virus. Phytopathologische Zeitschrift 80, 148–152. 304 ACTA BOT. CROAT. 69 (2), 2010 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees WRISCHER, M., LJUBE[I], N., DEVIDÉ, Z., 1975: Transformation of plastids in the leaves of Acer negundo L. var. odessanum (H. Rothe). Journal of Cell Science 18, 509–518. GRBELJA, J., LJUBE[I], N., 1975: Clover phyllody disease in Jugoslavia. Acta Botanica Croatica 34, 25–31. WRISCHER, M., LJUBE[I], N., DEVIDÉ, Z., 1975: Ultrastructural studies of plastids in leaves of Fraxinus excelsior L. var. aurea (Willd.). Journal de Microscopie Biologie Cellulaire 23, 105–112. MAMULA, \., LJUBE[I], N., 1975: Identification of turnip mosaic virus in Tropaeolum majus L. Acta Botanica Croatica 34, 33–42. MILI^I], D., [TEFANAC, Z., LJUBE[I], N., 1975: Two plant viruses isolated from soil in Croatia. Rad Jugoslavenske akademije znanosti i umjetnosti 371, 161–170. WRISCHER, M., LJUBE[I], N., DEVIDÉ, Z., 1976: Ultrastructural and functional characteris- tics of plastids in the leaves of Ligustrum ovalifolium Hassk. var. aureum. Acta Botanica Croatica 35, 57–64. HORVATH, J., JURETI], N., LJUBE[I], N., BESADA, W. H., 1976: Natural occurrence of celery mosaic virus in Hungary. Acta Phytopathologica Academiae Scientiarum Hungaricae 11, 17–24. LJUBE[I], N., 1976: Phytoferritin in plastids of blackberry leaves. Acta Botanica Croatica 35, 51–56. SCHNEPF, E., DEICHGRÄBER, G., LJUBE[I], N., 1976: The effects of colchicine, ethionine, and deuterium oxide on microtubules in young Sphagnum leaflets. A quantitative study. Cytobiologie 13, 341–353. VLATKOVI], G., BELICZA, M., SUBOTI], R., UHLIK, Z., BATINI], D., LJUBE[I], N., 1976: Alpertov sindrom u dje~joj dobi. Elektronsko-mikroskopska studija dva bolesnika. Acta Medica Iugoslavica 30, 109–123. LJUBE[I], N., 1977: The formation of chromoplasts in fruits of Cucurbita maxima Duch. 'turbaniformis'. Botanical Gazette 138, 286–290. LJUBE[I]. N., 1977: Chromoplasts of Forsythia suspensa (Thunb.) Vahl. I. Ultrastructure and pigment composition. Acta Botanica Croatica 38, 23–28. LJUBE[I], N., RADI], M., 1979: Chromoplasts of Forsythia suspensa (Thunb.) Vahl. II. The effect of isopropyl N-phenylcarbamate. Acta Botanica Croatica 38, 29–34. LJUBE[I], N., 1979: Chromoplasts in the petals of Liriodendron tulipifera L. Zeitschrift für Pflanzenphysiologie 91, 49–52. MUSI], S., LJUBE[I], N., 1980: Electron microscopy of V2O5 microcrystals in the V2O5- NH3-H2O colloid system. Coloid and Polymer Science 258, 194–195. [ERMAN, D., LJUBE[I], N., 1980: Novije spoznaje o stanici. Medicinar 29, 3–71. LJUBE[I], N., 1981: The regreening of tubulous chromoplasts in fruits of Cucurbita max- ima Duch. cv. turbaniformis. Acta Botanica Croatica 40, 61–66. LJUBE[I], N., 1982: Phytoferritin accumulation in chromoplasts of Sorbus aucuparia L. fruits. Acta Botanica Croatica 41, 29–32. WRISCHER, M., LJUBE[I], N., 1984: Plastid differentiation in Calceolaria petals. Acta Botanica Croatica 43, 19–24. ACTA BOT. CROAT. 69 (2), 2010 305 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees LJUBE[I], N., 1984: Structural and functional changes of plastids during yellowing and regreening of lemon fruits. Acta Botanica Croatica 43, 25–30. HLOU[EK, A., LJUBE[I], N., 1985: The effect of SAN 9789 on tulip tree chromoplasts. Acta Botanica Croatica 44, 15–18. WRISCHER, M., HLOU[EK-RADOJ^I], A., KUNST, LJ., LJUBE[I], N., 1986: Differentiation of chloroplasts in leaves of aurea plants. In: AKOYOUNOGLOU, G., SENGER, H. (eds.), Regu- lation of chloroplast differentiation, 685–690. A. R. Liss. Inc., New York. WRISCHER, M., LJUBE[I], N., MAR^ENKO, E., KUNST, LJ., HLOU[EK-RADOJ^I], A., 1986: Fine structural studies of plastids during their differentiation and dedifferentiation. Acta Botanica Croatica 45, 43–54. HLOU[EK-RADOJ^I], A., LJUBE[I], N., 1988: The development of daffodil chromoplasts in the presence of herbicides SAN 9789 and SAN 9785. Zeitschrift für Naturforschung 43c, 418–422. MODRU[AN, Z., LJUBE[I], N., WRISCHER, M., 1989: Study of nucleoides in bean chloro- plasts by fluorescent and electron microscopy. Acta Botanica Croatica 48, 19–25. LJUBE[I], N., QUADER, H., SCHNEPF, E., 1989: Correlation between protonema morpho- genesis and the development of the microtubule system in Funaria spore germination under normal conditions and at high auxin concentrations: an immunofluorescence study. Canadian Journal of Botany 67, 2227–2234. DEVIDÉ, Z., LJUBE[I], N., 1989: Plastid transformation in greening scales of the onion bulb (Allium cepa, Alliaceae). Plant Systematics and Evolution 165, 85–89. MURAJA, J., LJUBE[I], N., WRISCHER, M., 1990: Seasonal changes in the chloroplasts of cherry-laurel leaves. Acta Botanica Croatica 49: 23–28. [ERMAN, D., LJUBE[I], N., 1990: Molekularna biologija stanice, Medicinski fakultet, Zagreb, 1990. LJUBE[I], N., WRISCHER, M., DEVIDÉ, Z., 1991: Chromoplasts – the last stages in plastid development. International Journal of Developmental Biology 35, 251–258. WRISCHER, M., LJUBE[I], N., MODRU[AN, Z., 1991: Development of Calceolaria chromo- plasts in the presence of herbicides affecting carotenoid biosynthesis. Acta Botanica Croatica 50, 25–30. WRISCHER, M., LJUBE[I], N., DEVIDÉ, Z., 1992: Ultrastructural studies of degradational processes in amitrole-damaged photosynthetic membranes. Journal of Structural Biol- ogy 108, 1–5. LJUBE[I], N., WRISCHER, M., 1992: Different illumination dependent behaviour of chloro- plast ultrastructure in the gall and leaf tissues of Zelkova serrata 'Aurea'. Biochemie und Physiologie der Pflanzen 188, 97–103. FULGOSI, H., LJUBE[I], N., 1992: Dynamics of plastid nucleoids changes in wild- and aurea-type leaves of Ligustrum ovalifolium Hassk. var. aureum. Acta Botanica Croatica 51, 21–26. LJUBE[I], N., MATIJEVI], D., 1992: The effect of amitrole on the pigment composition and ultrastructure of chromoplasts of tulip tree flowers. Acta Botanica Croatica 51, 13–19. WRISCHER, M., LJUBE[I], N., 1993: The effect of light and norflurazon on the bleaching processes in chloroplasts. Periodicum Biologorum 95, 267–268. 306 ACTA BOT. CROAT. 69 (2), 2010 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees SALOPEK, B., LJUBE[I], N., 1994: The fine structure of pepper chromoplasts: The effect of bleaching herbicides. Acta Botanica Croatica 53, 7–13. GOTI], M., POPOVI], S., LJUBE[I], N., MUSI], S., 1994: Structural properties of precipitates formed by hydrolysis of Fe3+ ions in aqueous solutions containing NO3– and Cl– ions. Journal of Materials Science 29, 2474–2480. PAVLICA, M., LORKOVI], Z., LJUBE[I], N., PAPE[, D., 1994: Cytogenetical, immuno-fluo- rescence, ultrastructural and biochemical investigations of pesticide genotoxicity in plants. Periodicum Biologorum 96, 410–412. MUSI], S., GOTI], M., LJUBE[I], N., 1995: Influence of sodium polyanethol sulphonate on the morphology of ß-FeOOH particles obtained from the hydrolysis of a FeCl3 solution. Materials Letters 25, 69–74. LJUBE[I], N., WRISCHER, M., DEVIDÉ, Z., 1995: Development of chromoplast tubules in Hypericum flowers. Periodicum Biologorum 97, 333–336. LJUBE[I], N., WRISCHER, M., DEVIDÉ, Z., 1996: Chromoplast structures in Thunbergia flowers. Protoplasma 193, 174–180. SELAKOVI], D., LJUBE[I], N., PREBEG, T., 1996: The influence of carotenoid composition on chromoplast structures. Journal of Computer-Assisted Microscopy 8, 275–276. WRISCHER, M., LJUBE[I], N., SALOPEK, B., 1996: Fibrillar and tubular structures in chromoplasts. Journal of Computer-Assisted Microscopy 8, 213–214. MUSI], S., CZAKÓ-NAGY, I., SALAJ-OBELI], I., LJUBE[I], N., 1997: Formation of a-Fe2O3 particles in aqueous medium and their properties. Materials Letters 32, 301–305. GALE[I], M., TE@AK, \., TUDJA, M., LJUBE[I], N., BABI]-IVAN^I], V., 1997: Characteriza- tion of lyotropic liquid crystalline phases by transmission-, and scanning electron mi- croscopy. Fizika A 6, 15–22. LJUBE[I], N., DUGONJI], B., FULGOSI, H., 1997: Gamma-ray-induced changes in the chloroplasts of Hamatocactus setispinus. Periodicum Biologorum 99, 61–66. PREBEG, T., LJUBE[I], N., SELAKOVI], D., 1997: The effect of light intensity on the chloroplasts of tomato aurea mutant. Periodicum Biologorum 99, 409–414. SALOPEK, B., LJUBE[I], N., WRISCHER, M., MAGNUS, V., 1998: Greening of non-trans- formed and Agrobacterium rhizogenes transformed adventitious potato roots. Biologia (Bratislava) 53, 127–132. [ARI], A., NOMURA, K., POPOVI], S., LJUBE[I], N., MUSI], S., 1998: Effects of urotropin on the chemical and microstructural properties of Fe-oxide powders prepared by the hy- drolysis of aqueous FeCl3 solutions. Materials Chemistry and Physics 52, 214–220. TE@AK, \., JAL[ENJAK, N., LJUBE[I], N., 1998: Formation of the lamellar phase of alkyl-benzenesulphonates from surfactant/water/electrolyte solutions. Progress in Colloid and Polymer Science 110, 204–207. WRISCHER, M., LJUBE[I], N., SALOPEK, B., 1998: The role of carotenoids in the structural and functional stability of thylakoids in plastids of dark-grown spruce seedlings. Jour- nal of Plant Physiology 153, 46–52. MURAJA-LJUBI^I], J., WRISCHER, M., LJUBE[I], N., 1998: Formation of the photosynthetic apparatus in plastids during greening of potato microtubers. Plant Physiology and Bio- chemistry 36, 747–752. ACTA BOT. CROAT. 69 (2), 2010 307 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees WRISCHER, M., LJUBE[I], N., DEVIDÉ, Z., 1998: The influence of norflurazon on the forma- tion of chromoplast tubules in Hypericum perforatum flowers. Acta Botanica Croatica 57, 11–18. WRISCHER, M., LJUBE[I], N., PREBEG, T., MAGNUS, V., 1999: The succession of chromo- plast structures in Impatiens noli tangere flowers. Phyton 39, 49–59. MURAJA-LJUBI^I], J., WRISCHER, M., LJUBE[I], N., 1999: Influence of herbicides amitrole and norflurazon on greening of illuminated potato microtubers. Zeitschrift für Natur- forschung 54c, 333–336. PREBEG, T., LJUBE[I], N., WRISCHER, M., 1999: Structural and physiological characteris- tics of the coloured spots on the Leucojum perigone. Phyton 39, 75–78. FULGOSI, H., LJUBE[I], N., 1999: Molecular structure of spinach chloroplast nucleoids. Acta Botanica Croatica 58, 15–25. LJUBE[I], N., PREBEG, T., DEVIDÉ, Z., 1999: Chromoplasts in the sepals of Physalis alkekengi: The effect of norflurazon on chromoplast differentiation. Acta Botanica Croatica 58, 79–86. SALOPEK-SONDI, B., KOVA^, M., LJUBE[I], N., MAGNUS, V., 2000: Fruit initiation in Helleborus niger L. triggers chloroplast formation and photosynthesis in the perianth. Journal of Plant Physiology 157, 357–364. FRANJEVI], D., KRAJNA, A., KALAFATI], M., LJUBE[I], N., 2000: Toxic effects of copper upon the planarian Polycelis felina (Daly.). Periodicum Biologorum 102, 283–287. FRANJEVI], D., KRAJNA, A., KALAFATI], M., LJUBE[I], N., 2000: The effects of zinc upon survival and regeneration of planaria Polycelis felina. Biologia, Bratislava 55, 689– 694. WRISCHER, M., LJUBE[I], N., MAGNUS, V., DEVIDÉ, Z., 2000: Structural and functional characteristics of overwintering blackberry leaves. Acta Botanica Croatica 59, 5–16. [EGOTA, S., TE@AK, \., LJUBE[I], N., 2001: Formation of vesicles in diluted aqueous solu- tion of surfactant investigated by direct analysis of light scattering. Advances in Colloid and Interface Science 89–90, 283–291. BRITVEC, M., REICHENAUER, T., SOJA, G., LJUBE[I], N., EID, M., PECINA, M., 2001: Ultrastructure changes in grapevine chloroplasts caused by increased tropospheric ozone concentrations. Biologia, Bratislava 56, 417–424. LEPEDU[, H., CESAR, V., LJUBE[I], N., 2001: Chloroplast ultrastructure and chlorophyll levels in vegetative buds and needels of Norway spruce (Picea abies L. Karst.). Periodicum Biologorum 103, 61–65. KALAFATI], M., KOVA^EVI], G., LJUBE[I], N., [UNJI], H., 2001: Effects of ciprofloxacin on green hydra and endosymbiotic alga. Periodicum Biologorum 103, 267–272. KOVA^EVI], G., KALAFATI], M., LJUBE[I], N., [UNJI], H., 2001: The effect of chloramphe- nicol on the symbiosis between alga and hydra. Biologia, Bratislava 56, 605–610. LJUBE[I], N., WRISCHER, M., PREBEG, T., BRKI], D., 2001: Carotenoid-bearing structures in fruit chromoplasts of Solanum capsicastrum Link. Acta Botanica Croatica 60, 131–139. WRISCHER, M., PREBEG, T., MAGNUS, V., LJUBE[I], N., 2001: Ultrastructural study of chromoplast components rich in glycolipids. Acta Botanica Croatica 60, 141–147. 308 ACTA BOT. CROAT. 69 (2), 2010 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:18 Color profile: Disabled Composite 150 lpi at 45 degrees LEPEDU[, H., LJUBE[I], N., CESAR, V., 2001: The effect of 2,4-D on the photosynthetic ap- paratus in cotyledons of spruce (Picea abies L. Karst.) seedlings grown in the dark. Acta Botanica Croatica 60, 211–218. FULGOSI, H., ESTER, L., LJUBE[I], N., 2002: Essential role of peptidyl-propyl isomerase sll0408 in Synechocystis sp. PCC 6803 development. Periodicum Biologorum 104, 413–419. POLJUHA, D., BALEN, B., BAUER, A., LJUBE[I], N., KRSNIK-RASOL, M., 2003: Morphology and ultrastructure of Mammillaria gracilis (Cactaceae) in in vitro culture. Plant Cell, Tissue and Organ Culture 75, 117–123. LEPEDU[. H., CESAR,V., LJUBE[I], N., HAS-SCHÖN, E., 2003: Photosynthetic pigments, chloroplast distribution and fine structure in vegetative buds of two spruce species. Biologia, Bratislava 58, 867–873. LEPEDU[, H., CESAR, V., LJUBE[I], N., 2003: The appearance of vacuolar polyphenols in vegetative buds and developing needles of Norway spruce (Picea abies L. Karst.). Periodicum Biologorum 105, 295–300. CESAR, V., LEPEDU[, H., LJUBE[I], N., 2004: Histochemical observations on the needles of norway spruce (Picea abies L.) trees affected by cement dust pollution. Phyton Annales Rei Botanicae 44, 205–217. BA^I], T., LJUBE[I], N., U@AREVI], Z., GRGI], LJ., RO[A, J., 2004: TEM investigation of tannins and chloroplast structure in needles of damaged silver fir trees (Abies alba Mill.). Acta Biologica Cracoviensia Series Botanica 46, 145–149. LEPEDU[, H., VILJEVAC, M., CESAR, V., LJUBE[I], N., 2005: Functioning of the photosyn- thetic apparatus under low and high light conditions in chlorotic spruce needles as eval- uated by in vivo chlorophyll fluorescence. Russian Journal of Plant Physiology 52, 165–170. LJUBE[I], N., WRISCHER, M., PREBEG, T., DEVIDÉ, Z., 2005: Structural changes of the lamellar cells in the leaves of the moss Polytrichum formosum Hedw. during winter freezing and thawing processes. Acta Botanica Croatica 64, 219–226. KOVA^EVI], G., KALAFATI], M., LJUBE[I], N., 2005: Endosymbiotic alga from green hydra under the influence of cinoxacin. Folia Microbiologica 50, 205–208. FULGOSI, H., LEPEDU[, H., CESAR, V., LJUBE[I], N., 2005: Differential accumulation of plastid preprotein translocon components during spruce (Picea abies L. Karst.) needle development. Biological Chemistry. 386, 777–783. LEPEDU[, H., CESAR, V. LJUBE[I], N., 2005: Photosystem II efficiency, chloroplast pig- ments and fine structure in previous-season needles of Norway spruce (Picea abies L. Karst.) affected by urban pollution. Periodicum Biologorum 107, 329–333. IVANKOVI], S., MUSI], S., GOTI], M., LJUBE[I], N., 2006: Cytotoxicity of nanosize V2O5 particles to selected fibroblast and tumor cells. Toxicology in Vitro 20, 286–294. LJUBE[I], N., BRITVEC, M., 2006: Tropospheric ozone-induced structural changes in leaf mesophyll cell walls in grapevine plants. Biologia 61, 85–90. PREBEG, T., LJUBE[I], N., WRISCHER, M.: Differentiation of chromoplasts in Cucumis sativus petals. International Journal of Plant Sciences 167, 437–445. ACTA BOT. CROAT. 69 (2), 2010 309 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:19 Color profile: Disabled Composite 150 lpi at 45 degrees PREBEG, T., LJUBE[I], N., WRISCHER, M., 2006: Chloroplast biogenesis in Chelidonium majus petals. Acta Societatis Botanicorum Poloniae 75, 107–112. KOVA^EVI], G., KALAFATI], M., LJUBE[I], N., 2007: New observations on green hydra symbiosis. Folia Biologica (Kraków) 55, 77–79. WRISCHER, M., PREBEG, T., MAGNUS, V., LJUBE[I], N., 2007: Crystals and fibrils in chromoplast plastoglobules of Solanum capsicastrum fruit. Acta Botanica Croatica 66, 81–87. [IJAKOVI]-VUJI^I], N., LJUBE[I], N., @INI], M., 2007: Transcription of gel assemblies of bola type bis(oxalamide)-dicarboxylic acid and -diester gelators into silica nanotubes and ribbons under catalyzed and non-catalysed conditions. Croatica Chemica Acta 80, 591–598. DUNKI], V., BEZI], N., LJUBE[I], N., BO^INA, I., 2007: Glandular hair ultrastructure and essen- tial oils in Satureja subspicata Vis. ssp. Liburnica [ili}: Acta Biologica Cracoviensia – Series Botanica 49, 45–52. PREBEG, T., WRISCHER, M., FULGOSI, H., LJUBE[I], N., 2008: Ultrastructural characteriza- tion of chloroplasts in cucumber fruit. Journal of Plant Biology 51: 122–131. TKALEC, M., PREBEG, T., ROJE, V., PEVALEK-KOZLINA, B., LJUBE[I], N., 2008: Cadmium- -induced responses in duckweed Lemna minor L. Acta Physiologiae Plantarum 30, 881–890. FULGOSI, H., JURI], S., LEPEDU[, H., HAZLER-PILEPI], K., PREBEG, T., LJUBE[I], N., 2008: Thylakoid system disassembly during bleaching of aurea mutants of Acer negundo Hassk. var. Odessanum. Croatica Chemica Acta 81, 89–95. BURI], Z., VILI^I], D., CAPUT MIHALI], K., CARI], M., KRALJ, K., LJUBE[I], N., 2008: Pseudo-nitzschia blooms in the Zrmanja River estuary (eastern Adriatic Sea). Diatom Research 23, 51–63. KOVA^EVI], G., KALAFATI], M., LJUBE[I], N., 2009: Effects of norflurazon on green and brown hydra. Folia Biologica (Kraków) 57, 91–96. WRISCHER, M., PREBEG, T., MAGNUS, V., LJUBE[I], N., 2009: Unusual thylakoid structures appearing during degradation in the photosynthetic apparatus in chloroplasts. Acta Botanica Croatica 68, 1–9. BO^INA, I., LJUBE[I], N., SARAGA-BABI], M., 2010: Cilia-like structures anchor the amphi- oxus notochord to its sheat. Acta Histochemica, in press. doi:10.1016/j.acthis.2009. 08.002 310 ACTA BOT. CROAT. 69 (2), 2010 U:\ACTA BOTANICA\Acta-Botan 2-10\social news.vp 11. listopad 2010 15:52:19 Color profile: Disabled Composite 150 lpi at 45 degrees