Results 61 to 70 of about 109,083 (346)
An Anatomically Preserved Cone-like Flower from the Lower Cretaceous of China
Life, 2023 Although diverse fossil angiosperms (including their reproductive organs) have been reported from the Early Cretaceous, few of them are well-documented due to poor preservation and limited technologies available to apply. For example, paraffin sectioning,
Xin Wang +3 more
doaj +1 more source
Self-pollination by sliding pollen in Caulokaempferia coenobialis (Zingiberaceae) [PDF]
, 2005 Caulokaempferia coenobialis (Zingiberaceae) forms dense populations on steep cliffs in shady, humid monsoon forests in south China. It produces few consecutively opening bright yellow flowers that are 3 cm long and oriented parallel to the ground.
Chen, Zhongyi +3 more
core +1 more source
Advanced Science, EarlyView.ABSTRACT Viruses often hijack host developmental programs to promote infection, but the mechanistic links between reproductive regulation and antiviral immunity remain incompletely understood. Here, we identify a virus‐triggered hierarchical degradation cascade that links antiviral immunity and fertility regulation in rice. We show that the rice grassy
Yuansheng Wu +13 more
wiley +1 more source
Evolutionary Analysis of MIKCc-Type MADS-Box Genes in Gymnosperms and Angiosperms
Frontiers in Plant Science, 2017 MIKCc-type MADS-box genes encode transcription factors that control floral organ morphogenesis and flowering time in flowering plants. Here, in order to determine when the subfamilies of MIKCc originated and their early evolutionary trajectory, we ...
Fei Chen +3 more
semanticscholar +1 more source
American Journal of Botany, EarlyView.Abstract Premise We examined the African arid corridor (AAC) disjunction pattern of vascular plants between northeastern and southwestern Africa in the context of geological and climatic events since the late Miocene. We developed a phylogenetic and biogeographical framework for the arid‐adapted genus Sesamothamnus (Pedaliaceae), a classic example of ...
John G. Zaborsky +6 more
wiley +1 more source
The catalytic core of DEMETER guides active DNA demethylation in Arabidopsis. [PDF]
, 2019 The Arabidopsis DEMETER (DME) DNA glycosylase demethylates the maternal genome in the central cell prior to fertilization and is essential for seed viability.
Aravind, L. +15 more
core +2 more sources
High‐elevation endemic plants predicted to lose habitat from changing climate in Washington State
American Journal of Botany, EarlyView.Abstract Premise High‐elevation plants face unique challenges from potential climate change impacts that will likely require upslope migration into increasingly smaller suitable habitat. This situation is particularly acute for endemic species that by definition occupy small geographic ranges.
Nicholas L. Gjording +4 more
wiley +1 more source
Ecology and EvolutionThe evolutionary adaptations of plant reproductive structures, including angiosperm petal size, are driven by a combination of natural selection influenced by ecological conditions.
Siyu Chen +4 more
doaj +1 more source
Quantitative vessel mapping on increment cores: a critical comparison of image acquisition methods
Frontiers in Plant ScienceIntroductionQuantitative wood anatomy is critical for establishing climate reconstruction proxies, understanding tree hydraulics, and quantifying carbon allocation.
Richard L. Peters +20 more
doaj +1 more source
Climate and seed mass drive intraspecific variation in seed longevity in storage
American Journal of Botany, EarlyView.Abstract Premise Conservation seed banks are essential for ex situ plant conservation, but stored seeds slowly deteriorate and lose viability. Seed longevity in storage is determined by the initial seed viability and the rate of seed viability loss. The rate of seed viability loss in storage varies between species and possibly between populations or ...
Lea Klepka +2 more
wiley +1 more source