نتایج جستجو برای: angiosperm

تعداد نتایج: 6047  

Journal: :Annals of the Missouri Botanical Garden 1975

Journal: :Annals of the Missouri Botanical Garden 1975

Journal: :Proceedings of the National Academy of Sciences 2008

Journal: :American Journal of Botany 2021

Premise A subset of parasitic plants bear extremely reduced features and grow nearly entirely within their hosts. Until recently, most these endoparasites were thought to represent a single clade united by morphology. Current phylogenetic understanding contradicts this assumption indicates distantly related clades, thus offering an opportunity examine convergence among with life history. Method...

Journal: :Annals of the Missouri Botanical Garden 1975

2012
Zoë Migicovsky Igor Kovalchuk

Angiosperms do not contain a distinct germline, but rather develop gametes from gametophyte initials that undergo cell division. These gametes contain cells that give rise to an endosperm and the embryo. DNA methylation is decreased in the vegetative nucleus (VN) and central cell nuclei (CCN) resulting in expression of transposable elements (TEs). It is thought that the siRNAs produced in respo...

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