نتایج جستجو برای: dryopteris expansa
تعداد نتایج: 567 فیلتر نتایج به سال:
American Journal of Botany 99(4): 730–750, 2012; http://www.amjbot.org/ © 2012 Botanical Society of America The last decade has seen a nearly exponential increase in the number of molecular phylogenies published at various taxonomic levels across the plant tree of life. Vast uncharted territory still remains, however, particularly for ferns. Ferns are sister to seed plants ( Pryer et al., 2001 ...
The existence of pronounced cytoplasmic pH gradients within the apices of tip-growing cells, and the role of cytoplasmic pH in regulating tip growth, were investigated in three different cell types: vegetative hyphae of Neurospora crassa; pollen tubes of Agapanthus umbellatus; and rhizoids of Dryopteris affinis gametophytes. Examination of cytoplasmic pH in growing cells was performed by simult...
background and objectives: the main aims of this study have been finding out the antibacterial activity and preliminary phytochemical screening of some fern species. methods: the antimicrobial activity of the methanol extracts of polypodium interjectum shivas, polystichum woronowii fomin, polystichum aculeatum (l.) roth., dryopteris affinis (lowe) fraser-jenk, athyrium filix-femina (l.) roth, a...
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