8 91 Goner A. Shaker Bull. Iraq nat. Hist. Mus. (2016) 14 (1): 91-97 ISOLATION AND IDENTIFICTION OF FUNGI INFECTING ALOE VERA PLANT Goner A. Shaker Iraq Natural History Research Center and Museum, University of Baghdad, Baghdad, Iraq E-mail: gonerwahhab@yahoo.com ABSTRACT This study included isolation and identification of the fungi associated with Aloe vera (L.) in nurseries and plant gardens. The results showed that the fungi Alternaria alternata, Fusarium oxysporum, Fusarium solani, Nigrospora oryzae, Cladosporium herbarum, Stemphylium botryosum, Aspergillus niger, Penicillium sp. were isolated from the diseased leaves of Aloe vera showing spots and blight symptoms. The percentages of disease incidence in March, Jun and August were found to be 5, 50 and 60 %, respectively. Pathogenicity test of Alternaria alternata, Fusarium oxysporum, Nigrospora oryzae and Cladosporium herbarum showed that disease index were 50, 25,25and 12.5 %, respectively. The fungi isolated on Aloe vera in this study have not been published previously in Iraq. Key words: Aloe vera, Fungi, Gardens, Isolation, Nurseries. INTRODUCTION Aloe vera (L.) Burn.f belongs to family Aloaceae, is perennial, succulent plant with a height of 60-100 cm,stemless sessile herb, leaves 30–50 cm long and 10cm broad, color pea- green bright yellow tubular, flowers arranged in a slender loose spike (Youngken, 1950). Four hundred species of Aloe have been reported worldwide, A. vera is the most extensively cultivated as a medicinal plant. It is adapted widely all over the world, in the tropics to temperate regions especially. Aloe leaves are filled with gel which is the most important constituent of the plant and has great medicinal value. A. vera has been reported to contain amino acids, anthraquinones, enzymes, lignin, minerals, mono and polysaccharides, salicylic acid, saponins, sterols and vitamins (Barcroft and Myskja, 2003). A. vera plants have been entered in many herbal drugs for the keeping of good health. In cosmetic industries Aloe is used in the production of soap for bathing, shampoo, hair wash, toothpaste and body creams (Daodu, 2000). A. vera gel has been reported very effective for the treatment of sore and wounds, skin cancer, skin disease, cold and cough, constipation, piles, fungal infection, asthma, ulcer and diabetes (Daodu, 2000; Djeraba and Quere, 2000; Olusegun, 2000; Davis and Moro, 1989). Aloe vera has a long history of popular and traditional use. It is used in traditional Indian medicine for constipation, colic, skin diseases, worm infestation, and infections .In Chinese medicine, it is often recommended in the treatment of fungal diseases (Heber, 2007). A total of 15 fungi, including Fusrium roseum, Fusarium oxysporum, Alternaria alternate, Alternaria dianthi, Aspegillus niger, Aspergillus fumigatus, Drechslera australiensis, Curvularia senegalensis, Colletotrichum dematium, Nigrospora oryza,and Trichoderma viride were isolated from the leaves samples of A.vera collected from different areas(Singh et al., 2014).Surveys have shown that the common disease on the A.vera plants was leaves spots which causes harmful effects on the medical value of the plant parts, and mailto:gonerwahhab@yahoo.com 92 Isolation and identifiction of fungi infecting other fungi Fusarium solani, Aspergillus niger, Penicillium spp. were recorded (Chavan and Korekar, 2011). The purpose of this study is to identify the pathogenic fungi infecting Aloe vera plants in some nurseries in the Baghdad area. MATERIALS AND METHODS Isolation: Aleo vera infected leaves showing ,were collected from the Department of Drugs and Medicinal Plants, Pharmacy College - University of Baghdad and some nurseries, the leaves were washed with water, cut off to parts of 2-5 mm length, surface sterilized in 1.5% sodium hypochlorite solution for (1-2) minutes, rinsed with sterile water and then cultured on Potato Dextrose Agar (4 pieces/plate) and incubated at 27±2°C. Fungal growth was purified by the single hyphal tip method and subculture on PDA to serve as inoculum source. Identification of the pathogen: The identification of fungi was made by preparing slides of the fungal growth and observing them under a compound microscope. Pure cultures of fungi were prepared and maintained on potato dextrose agar (PDA) slants. The fungi mounted on slides, stained with lacto phenol-cotton blue and examined under microscope diagnosis based on morphological characteristics of the colonies and spore and preserved in slants at 4-5 C°. Estimation the disease incidence: The disease percentage was reported from surveys, visiting the plant garden and the nurseries cultivated with Aloe vera plants and examined the infected plants twice in onset and the end of the season. One of the main symptoms that appeared on the diseased plants include a small superficial necrosis, brown spots on leaves, Sometimes these spots connect together and cause to dying the leaf entirely and become deepened and more darker under wet conditions, and blight seem on the tip and edges of the leaves or all the leaf, and sometimes appears white color on spotting area resulting from the fungus mycelium, and rotting the basis of the leaves near the soil, which cause the death of the little seedlings as all or death many of leaves in old seedlings (Fig. 1, 2, 3) which is similar to the symptoms mentioned by Kawuri et al. (2012). The percentage of disease incidence was estimated by using the following formula: The percentage of disease incidence = No. of diseased plants No. of all plants × 100 The pathogenicity test: Based on Koch postulate Pathogenicity studies was conducted on healthy leaves of Aloe vera plants, cleaned spotless of similar size leaves were collected, washed with tap water and placed on the surface of wet-cotton in a petri dish. Inoculums plug (5 mm diam.) of Alternaria alternata, Fusarium oxysporum, Nigrospora oryzae, Cladosporium herbarum cultures were placed on the leaves. Plugs of PDA only were placed on another leaves for control. Three replications of each treatment were used. The plates were maintained at room temperature until the development of symptoms the data had been recorded, and the treated specimens were ranked on the basis of the disease severity and assessed as follows: 0- leaves healthy, 1- a few spots or slight necrosis as (1-25%) from leaf size, 2- the spotting take over (26-50%), 3- the spotting take over (51-75%), 4- blighting takes over (76-100%) (El-Morsy, 2004). Disease index (DI) = . × ….. . × . × . × 100 93 Goner A. Shaker RESULTS AND DISCUSSION Identification: Results of isolation and identification depending on the keys of each fungus and on the shape of conidia and conidiophores that formed on the fungal growth on PDA (Booth, 1971; Ellis, 1971; Barnett and Hunter, 1972), revealed that the fungi Alternaria alternata, Fusarium oxysporum, Fusarium solani, Nigrospora oryzae, Cladosporium herbarum, Stemphylium botryosum, Aspergillus niger, Penicillium sp. were found associated with the infected leaves of Aleo vera. Disease incidence: The results in table (1) showed that the disease incidence during March, June and August months were estimated to be 5, 50, and 60 %, respectively. The injury on the plants is more common in nurseries and became more clear and severe in climatic conditions appropriate to infection, high temperature in the atmosphere associated with high humidity in the soil. Significant variation in the ability of fungi to cause the disease between June, September and August were observed. Similar results concerning the disease incidence and injury were reported in West Bengal State throughout the year from January to December caused by Alternaria brassicae with infection percentages 83.28% - 95.71% (Ghosh and Banerjee, 2014). Table (1): Disease percent on Aloe vera leaves nurseries. The months %Disease percent March 5 Jun 50 August 60 The pathogenicity test: The results in table (2) indicated that the disease index of the fungi Alternaria alternata, Fusarium oxysporum, Nigrospora oryzae and Cladosporium herbarum were estimated to be 50, 25, 25,12.5 %,respectively, compared with 0% in control. Leaf spots, similar to those observed on infected Aleo vera in the nursery were manifested on the leave is used in the test after 20 days of inoculation. The same fungal isolates were re-isolated from the inoculated leaves of A. vera. It was reported that among many fungi recorded to infect A. vera, F. oxysporum was fond the most dominant that representing 90 %, followed by Drechslera australiensis 73.3% Trichoderma viride 66.6% and Alternaria alternate 33.3% (Singh et al., 2014). Another study Ilondu (2013) showed that F. oxysporum was the more virulent and followed by Pestalotia psidii and Cladosporium herbarum. Several previous studies reported similar results concerning the pathogenic fungi infecting Aleo vera plant in the world as leaf spots on Aloe vera caused by Nigrospora oryzae in china was recorded by Zhai et al. (2013). Fungi associated with the base rot disease of Aloe vera (Aloe barbadensis) were investigated by Ayodele and Ilondu (2008) in Nigeria and found the percentage frequency were as Aspergillus verocosa 28.03%, Fusarium oxysporium 24.24% and Torula herbarium 15.15%. Table (2): Disease index of pathogenicity test on Aloe vera leaves in vitro condition. Species (DI) % Alternaria alternata 50 Cladosporium herbarum 25 Fusarium oxysporum 25 Nigrospora oryzae 12.5 control 0.0 94 Isolation and identifiction of fungi infecting Figure (1): Symptoms of yellowing, browning on Aloe vera leaves surfaces and bases near the soil, then turn to blights causing rapid death to entire leaves. Figure (2): Symptom of necrotic tissue formed on Aloe vera leaves, the spots often are small and enlarge and deepen. 95 Goner A. Shaker Figure (3): Symptoms of dark brown spots on leaves margins of Aloe vera and then turn to a large patch, quickly turn to brown blighting . LITERTURE CITED Ayodele, S. M. and Ilondu, E. M. 2008. Fungi associated with base rot disease of aloe vera (Aloe barbadensis). African Journal of Biotechnology, 7(24): 4471-4474. Barcroft, A. and Myskja, A. 2003. Aloe vera Nature’s Silent Healer. BAAM Publishing Ltd. London. 317pp. Barnett, H. L. and Hunter, B.B. 1972. Illustrated genera of imperfect fungi. 3ed edition. Burgess Pub. Co., Minneapolis, Minnesota, USA. 241pp. Booth, C. 1971. The genus Fusarium–Commonwealth mycological Institute, Kew, Surrey, England. 237pp. Chavan, S. P. and Korekar, S. L. 2011.A Survey of Some Medical Plants for Fungal Diseases from Osmanabad District of Maharashtra State. Recent Research in Science and Technology, 3(5): 15-16. Daodu, T. 2000. Aloe vera, the miracle healing plant. Health Field Corporation, Lagos, p. 36. Davis, R. H. and Moro N. P. 1989. Aloe vera and gibbrellin, anti-inflammatory activity in diabetes. Journal of the American Podiatric Medical Association; 79(1): 24-26. Djeraba, A. Quere, P. 2000. In vivo macrophage activation in Chicken with acemannan, a complex carbohydrate extracted from Aloe vera. International Journal of Immunopharmacology, 22(5): 365-372. 96 Isolation and identifiction of fungi infecting Ellis, M. B. 1971. Dematiaceous hyphomycetes. Commonwealth mycological institute, Kew, survey, England. 608pp. El-Morsy, E. M. 2004. Evaluation of microfungi for the biological control of water hyacinth in Egypt. Fungal Diversity, 16:35-51. Ghosh, S. Kr. and Banerjee, S. 2014. First report of Alternaria brassicae leaf spot disease of Aloe vera and its disease intensity in West Bengal. European Journal of Biotechnology and Bioscience, 2(1): 37-43. Heber, D. 2007. Physicians’ Desk Reference for Herbal Medicines. Thomson Health Care, Montvale. 4th Ed. Pp. 515-518. Ilondu, E. M. 2013. Pathogenicity of mycoflora of tip-rot disease of Aloe vera (Syn Aloe barbadensis Miller). Common medicinal plant in Abraka, Delta State, Nigeria. African Journal of Microbiology Research , 7(33): 4271-4275. Kawuri, R.; Suprata, D. N.; Nitta, Y. and Homma, T. 2012. Destructive Leaf Rot Disease Caused by Fusarium oxysporum on Aloe barbadensis Miller in Bali. Agricultural Science Research Journal, 2(6): 295-301. Olusegun, A. 2000. One hundred medicinal uses of Aloe vera. Good health Inc. Lagos, p. 76. Singh, J.; Gupta, S.; Mishra, P. and Kori, I. P. 2014. Screening of Bio-control agent for the Eco-friendly Management of fungal Diseases of Aloe Vera. International Journal of Science and Research, 3(7):123-126. Youngken, H. W. 1950. Textbook of pharmacognosy. 6th ed. Philadelphia, Blakiston Publ. Co. New York. 1063pp. Zhai, L. F.; Liu, J.; Zhang, M.X. and Hong, N. ; Wang, G. P. and Wang, L. P. 2013. The First Report of Leaf Spots in Aloe vera Caused by Nigrospora oryzae in China. Plant Disease, 97(9): 1256. 97 Goner A. Shaker Bull. Iraq nat. Hist. Mus. (2016) 14 (1): 91-97 Aloe vera عزل و تشخیص الفطریات التي تصیب نبات كونر عبد الوھاب شاكر ، بغداد، العراقجامعة بغداد -مركز بحوث و متحف التأریخ الطبیعي Aloe vera (L.) الَصبِر الحقیقي او األلََوة الحقیقیة نبات ترافقشملت الدراسة عزل وتشخیص المسببات الفطریة التي و اظھرت النتائج بان الفطریات، في المشاتل والحدائق النباتیة Fusarium oxysporum, Fusarium solani, Nigrospora oryzae, Cladosporium herbarum, Stemphylium botryosum, Aspergillus niger, Penicillium sp. أشھر في وكانت النسبة المئویة لالصابة .اللفحة و أعراض التبقع علیھا والتي المصابة األوراقھي التي عزلت من وأظھرت نتائج اختبار القدرة االمراضیة لكل من الفطریات .على التوالي) ٪٦٠، ٥٠، ٥(آذاروحزیران وآب Alternaria alternata, Fusarium oxysporum, Nigrospora oryzae, Cladosporium herbarum Aloe vera من نبات عزلت التي الفطریات ان .٪، على التوالي١٢.٥ ، ٢٥،٢٥، ٥٠ وان نسبة الدلیل المرضي كانت .العراق فيسابقا لم تنشر ھذه الدراسة في