Results 61 to 70 of about 13,086 (189)

Some Effects of Photoperiod and Cold Storage on Oviposition of the Cereal Leaf Beetle Oulema Melanopus (Coleptera: Chrysomelidae) [PDF]

open access: yes, 2017
An expanded program of research on the cereal leaf beetle, Oulema melanopus (L.), in various north-central states has made it necessary to develop methods of rearing all stages of the beetle for laboratory use. Because the insect survives diapause in the
Connin, R. V., Jantz, O. K.
core   +2 more sources

F-53B interferes with meiosis and damages reproduction in Arabidopsis thaliana

open access: yesPlant Stress
The emerging contaminant chlorinated polyfluoroalkyl ether sulfonic acid (Cl-PFESA, trade name F-53B) damages mitotic cell viability leading to inhibited vegetative development in plants.
Yuting Chen   +10 more
doaj   +1 more source

AtPV42a and AtPV42b redundantly regulate reproductive development in Arabidopsis thaliana. [PDF]

open access: yesPLoS ONE, 2011
BACKGROUND: The conserved SNF1/AMPK/SnRK1 complexes are global regulators of metabolic responses in eukaryotes and play a key role in the control of energy balance.
Lei Fang   +5 more
doaj   +1 more source

The life cycles of cryptogams [PDF]

open access: yes, 1991
Meiosis and karyogamy are recognized as control points in the life cycle of cryptogams. The control of meiosis is evidently complex and in yeast, and by analogy in all cryptogams, involves progressive gene activation.
Bell, Peter R.
core   +2 more sources

YAO is a nucleolar WD40-repeat protein critical for embryogenesis and gametogenesis in Arabidopsis [PDF]

open access: yes, 2010
Background In flowering plants, gametogenesis generates multicellular male and female gametophytes. In the model system Arabidopsis, the male gametophyte or pollen grain contains two sperm cells and a vegetative cell.
Hong-Ju Li   +4 more
core   +2 more sources

Assessing fertility preservation strategies: A scoping review

open access: yesAsian Pacific Journal of Reproduction
Objective: To describe the various options available for preserving female and/or male fertility, taking into account both social and medical aspects, and to identify the effects of different natural products on male infertility extracted from plants ...
Chaimaa Hilali   +7 more
doaj   +1 more source

Cell cycle length, cell size, and proliferation rate in hydra stem cells [PDF]

open access: yes, 1990
We have analyzed the cell cycle parameters of interstitial cells in Hydra oligactis. Three subpopulations of cells with short, medium, and long cell cycles were identified. Short-cycle cells are stem cells; medium-cycle cells are precursors to nematocyte
Bode   +34 more
core   +1 more source

Chemical Competition between Microscopic Stages of Macrocystis pyrifera and Five Native Kelp Species: Does Giant Kelp Always Lose? [PDF]

open access: yes, 2018
The giant kelp Macrocystis pyrifera is often considered competitively dominant to other kelp species due to its high productivity. However, on the microscopic level, previous studies found that Macrocystis can be inferior to other kelp species through ...
Christensen, Maria Suzanne
core   +1 more source

The concept of the sexual reproduction cycle and its evolutionary significance [PDF]

open access: yes, 2015
The concept of a sexual reproduction cycle (SRC) was first proposed by Bai and Xu in 2013 to describe the integration of meiosis, sex differentiation and fertilization.
Shu-Nong Bai
core   +2 more sources

DNA methylation remodeling and the functional implication during male gametogenesis in rice

open access: yesGenome Biology
Background Epigenetic marks are reprogrammed during sexual reproduction. In flowering plants, DNA methylation is only partially remodeled in the gametes and the zygote.
Xue Li   +12 more
doaj   +1 more source

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