id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
abc-1469	Yankova-Tsvetkova, Elina Petrova; Yurukova-Grancharova, Petka; Baldjiev, Georgi; Vitkova, Antonina	Embryological features, pollen and seed viability of Arnica montana (Asteraceae) – a threatened endemic species in Europe	2016	6	.pdf	application/pdf	4012	224	53	Pollen of Arnica montana analyzed by acetocarmine test: A) mature pollen grains without acetocarmine staining, B) viable pollen grains, stained in red, C) tricolporate viable pollen grain, stained in red, D) unviable, unstained pollen grain. Pollen and seed viability After acetocarmine staining, the cytoplasm and nuclei of viable pollen grains were stained in red while unviable, empty and shrunken pollen grains remain unstained (Figs.	cache/abc-1469.pdf	txt/abc-1469.txt