Results 31 to 40 of about 2,101,798 (135)
Ecological Adaptation Mechanisms Underlying Successful Plant Reproduction
During floral induction, various environmental and endogenous signals converge to regulate the florigen protein, which is transported from leaves to the SAM to initiate flowering. Within the SAM, a complex network of receptor kinases and small peptides orchestrates floral development with high spatiotemporal precision.
Hang Zhao +8 more
wiley +1 more source
Early evolutionary history of the seed
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Unwanted Pregnancy and Induced Abortion Among Female Youths: A Case Study of Temeke District [PDF]
Unwanted pregnancy is the major cause of induced abortion, one of the leading causes of maternal mortality and morbidity in the world. Hundreds of thousands of women become pregnant without intending to, and many of them decide to end the pregnancies ...
Mamboleo, Neema, Mamboleo, N.
core
ABSTRACT Of the three types of cytoskeleton known in animals—actin, microtubules, and intermediate filaments—only actin and microtubules exist in plants. Both play important roles in cellular shaping, organelle movement, organization of the endomembrane system, and cell signaling.
Norman R. Groves +3 more
wiley +1 more source
Silene, a versatile model system: from sex and genome evolution to ecology and speciation
Summary Fundamental and applied research in evolutionary biology benefits from the use of model systems in which approaches from disparate disciplines can be integrated. Here, we review recent progress in evolutionary research on the long‐standing model system Silene, a large genus with a well‐resolved phylogeny and newly available, expanded genomic ...
Sophie Karrenberg +16 more
wiley +1 more source
The abortion-crime link: evidence from England and Wales [PDF]
We use panel data from 1983 to 1997 for the 42 police force areas in England and Wales to test the hypothesis that legalizing abortion contributes to lower crime rates.
Paton, D, Simmons, R, Kahane, L H
core +4 more sources
Manifold limits on seed production by individual flowering plants
Abstract Premise Historically, angiosperm seed production has been considered to be either pollen or resource limited. However, seed production involves more than pollen and seed resources and typically involves multiple ovules in multiple flowers. Therefore, various constraints may act simultaneously. Methods Proportional components of seed production
Lawrence D. Harder +1 more
wiley +1 more source
ABSTRACT The escalating global temperatures and intensifying heat stress events pose significant threats to maize productivity worldwide. Uncovering key thermotolerance genes and their functional mechanisms is thus critical for developing climate‐resilient crops.
Yufang Xu +8 more
wiley +1 more source
Abortion services in South Africa : challenges and barriers to safe abortion care : health care providers' perspectives [PDF]
Includes bibliographical references (leaves 199-213).Unsafe abortion is a preventable phenomenon and continues to be a major public health problem in many countries especially in the developing world.
Harries, Jane
core +1 more source
Hybridity of mainly asexually propagating duckweeds in genus Lemna – dead end or breakthrough?
Summary The cosmopolitan, mainly vegetatively propagating, organ‐reduced monocotyledonous aquatic duckweeds are the smallest and fastest growing angiosperms, distributed world‐wide and flower rarely in nature. Recently, we reported intra‐ and interspecific hybrids and ploidy variants in the genus Lemna.
Yuri Lee +10 more
wiley +1 more source

