Results 51 to 60 of about 24,573 (227)

Persistent symmetry frustration in pollen tubes. [PDF]

PLoS ONE, 2012
Pollen tubes are extremely rapidly growing plant cells whose morphogenesis is determined by spatial gradients in the biochemical composition of the cell wall.
Mariusz Pietruszka, Marcin Lipowczan, Anja Geitmann   +2 more
doaj   +1 more source

The Regulation of Sporopollenin Biosynthesis Genes for Rapid Pollen Wall Formation1[OPEN]

Plant Physiology, 2018
A feed-forward loop facilitates the expression of the sporopollenin biosynthesis pathway genes, thereby promoting rapid sexine formation. Sporopollenin is the major component of the outer pollen wall (sexine).
Ke Wang, Zong-Li Guo, Wen-Tao Zhou, Cheng Zhang, Ze-Yuan Zhang, Y. Lou, Shuangxi Xiong, Xiao-zhen Yao, Jiong-Jiong Fan, Jun Zhu, Zhongnan Yang   +10 more
semanticscholar   +1 more source

Defective callose walls and cell plates during abnormal meiosis cause male-sterility in the oat mutant zbs1

Journal of Integrative Agriculture, 2016
: During meiosis in flowering plants, degradation of the callose wall in tetrads releases newly produced microspores, which develop into mature pollen grains.
Xiao SHI, Jin-xia WU, Hai-tao ZHOU, Xiao-hong YANG, Tian-liang LI, Xin-jun ZHANG, Cai YANG, Xiao HAN   +7 more
doaj   +1 more source

PERSISTENT TAPETAL CELL2 Is Required for Normal Tapetal Programmed Cell Death and Pollen Wall Patterning1[OPEN]

Plant Physiology, 2019
PTC2, an AT-hook DNA binding protein, is required for tapetal programmed cell death and pollen wall patterning in rice. The timely programmed cell death (PCD) of the tapetum, the innermost somatic anther cell layer in flowering plants, is critical for ...
Muhammad Uzair, Dawei Xu, L. Schreiber, Jianxin Shi, W. Liang, K. Jung, Mingjiao Chen, Zhijing Luo, Yueya Zhang, Jing Yu, Dabing Zhang   +10 more
semanticscholar   +1 more source

Development of the pollen grain wall

Berichte der Deutschen Botanischen Gesellschaft, 1968
Patrick Echlin
openalex   +2 more sources

Combined analysis of transcriptome and metabolome reveals that sugar, lipid, and phenylpropane metabolism are essential for male fertility in temperature-induced male sterile rice

Frontiers in Plant Science, 2022
Photoperiod- and thermosensitive genic male sterility (PTGMS) rice is a vital germplasm resource consisting of two-line hybrid rice in which light and temperature strictly control their fertility changes.
Yujun Sun, Ming Fu, Yina Ang, Lan Zhu, Lan Zhu, Linan Wei, Ying He, Ying He, Hanlai Zeng   +8 more
doaj   +1 more source

Effect of wall-disruption on nutrient composition and in vitro digestion of camellia and lotus bee pollens

Food Science and Human Wellness
The nutrient digestion, absorption and biological activity of bee pollen may be limited due to the complex pollen wall. Here, the effect of superfine grinding technology on the release of nutrients from bee pollen were investigated, and their antioxidant
Yuan Yuan, Shun Zhong, Zeyuan Deng, Guangyan Li, Jinwu Zhang, Hongyan Li   +5 more
doaj   +1 more source

Pollen morphology of Curroria, Mondia, Socotranthus and Stomatostemma (Periplocaceae)

Bothalia: African Biodiversity & Conservation, 1993
The pollen morphology of I Planch., O Skeels, Socotranthus Kuntze and Stomatostemma N.E. Br. was studied.All the genera are characterized by pollen grains arranged in tetrads. The arrangement of the grains may be rhomboidal, tetrahedral or decussate. The
R. L. Verhoeven, H. J. T. Venter
doaj   +1 more source

Analysis of Developing Pollen Grains within Intact Arabidopsis thaliana Anthers by Olympus Two-Photon Laser Scanning Microscopy

Bio-Protocol, 2015
The method consists of imaging developing pollen grains as they form within intact, immature Arabidopsis thaliana anthers. Using two-photon excitation in the infrared wavelength range, the intrinsic fluorescence (autofluorescence) of developing pollen ...
Teagen Quilichini, A. Samuels, Carl Douglas   +2 more
doaj   +1 more source

The epidermal cell structure of the secondary pollen presenter in Vangueria infausta (Rubiaceae: Vanguerieae) suggests a functional association with protruding onci in pollen grains. [PDF]

PLoS ONE, 2014
Secondary pollen presentation is a well-known phenomenon in the Rubiaceae with particularly conspicuous pollen presenters occurring in the tribe Vanguerieae.
Patricia M Tilney, Abraham E van Wyk, Chris F van der Merwe   +2 more
doaj   +1 more source