Results 31 to 40 of about 2,785,401 (324)

Cellular dynamics of double fertilization and early embryogenesis in flowering plants.

open access: yesJournal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2020
Flowering plants (angiosperms) perform a unique double fertilization in which two sperm cells fuse with two female gamete cells in the embryo sac to develop a seed.
J. Shin   +3 more
semanticscholar   +1 more source

Simple Whole-Mount Staining Protocol of F-Actin for Studies of the Female Gametophyte in Agavoideae and Other Crassinucellate Ovules

open access: yesFrontiers in Plant Science, 2020
During plant sexual reproduction, F-actin takes part in the elongation of the pollen tube and the movement of sperm cells along with it. Moreover, F-actin is involved in the transport of sperm cells throughout the embryo sac when double fertilization ...
Alejandra G. González-Gutiérrez   +2 more
doaj   +1 more source

Double fertilization in Drosophila melanogaster [PDF]

open access: yesHereditas, 2008
In an inbred line of Drosophila melanogaster with marker genes on the sex-chromosomes as well as on one of the autosomes, it was shown that double fertilization (two sperms fertilizing one egg) is a reality and that gynandromorphic flies can be the result of double fertilization as well as of X-chromosome loss. In this inbred line it happens with about
KERSTIN BRANDT-ROSQUIST, K. G. LÜNING
openaire   +1 more source

Transcriptional integration of paternal and maternal factors in the Arabidopsis zygote [PDF]

open access: yes, 2017
In many plants, the asymmetric division of the zygote sets up the apical-basal axis of the embryo. Unlike animals, plant zygotes are transcriptionally active, implying that plants have evolved specific mechanisms to control transcriptional activation of ...
Aichinger, Ernst   +9 more
core   +2 more sources

Arabinogalactan proteins as interactors along the crosstalk between the pollen tube and the female tissues

open access: yesFrontiers in Plant Science, 2016
Arabinogalactan Proteins (AGPs) have long been considered to be implicated in several steps of the reproductive process of flowering plants. Pollen tube growth along the pistil tissues requires a multiplicity of signalling pathways to be activated and ...
Ana Marta Pereira   +5 more
doaj   +1 more source

Global crop yield response to extreme heat stress under multiple climate change futures [PDF]

open access: yes, 2014
Extreme heat stress during the crop reproductive period can be critical for crop productivity. Projected changes in the frequency and severity of extreme climatic events are expected to negatively impact crop yields and global food production. This study
Conway, Declan   +4 more
core   +1 more source

FERTILITY AND EMBRYO DEATH IN DOUBLE-YOLKED EGGS [PDF]

open access: yesReproduction, 1966
Summary. The fertility of double-yolked chicken eggs was 42·9% of which 27% contained two embryos. Single and double embryos died at different times of incubation. Sex ratio at 14 days and later was 44% males (P<0·02) for both types of embryo.
N S, Fechheimer, W P, Jaffe
openaire   +2 more sources

Effect of Varying Nitrogen and Micronutrient Fertilization on Yield Quantity and Quality of Sunflower (Helianthus annuus L.) Achenes

open access: yesAgronomy, 2022
Sunflower is a good alternative crop in rotation, even in light soils. This is due to the changing climate, economic factors and the need to reduce agriculture pressure on the environment.
Wacław Jarecki
doaj   +1 more source

Novel Classification Forms for Xenia

open access: yesHortScience, 2020
The xenia effect refers to the phenomenon whereby the pollen genotype directly affects seed and fruit development during the period from fertilization to seed germination, which leads to different characteristics in phenotypic traits.
Qin Yang   +5 more
doaj   +1 more source

Sperm DNA integrity does play a crucial role for embryo development after ICSI, notably when good-quality oocytes from young donors are used

open access: yesBiological Research, 2022
Based on the inconsistent literature published thus far involving infertile patients, whether intracytoplasmic sperm injection (ICSI) allows overcoming total fertilization failure due to sperm DNA fragmentation is still unclear.
Jordi Ribas-Maynou   +6 more
doaj   +1 more source

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