Results 71 to 80 of about 1,166,538 (311)

Arabidopsis class I formins control membrane-originated actin polymerization at pollen tube tips

PLoS Genetics, 2018
A population of dynamic apical actin filaments is required for rapid polarized pollen tube growth. However, the cellular mechanisms driving their assembly remain incompletely understood.
Yaxian Lan, Xiaonan Liu, Ying Fu, Shanjin Huang   +3 more
semanticscholar   +1 more source

PEK14: A Kinesin‐4 Necessary for Male‐Derived Fertility in Arabidopsis thaliana

Cytoskeleton, EarlyView.
ABSTRACT Of the 61 kinesins annotated in Arabidopsis thaliana, many are still without assigned function. Here, we have screened an insertional mutant library of Arabidopsis pollen‐expressed kinesins for fertility defects. Insertional mutants for three kinesins showed a significant reduction in seed set.
Isabella N. Mendes, Norman R. Groves, Jessica Z. Li, Lily N. Thompson, Brian J. Smith, Aman Y. Husbands, Iris Meier   +6 more
wiley   +1 more source

The effect of intracellular calcium level regulators on the synthesis of pollen tube callose in Oenothera biennis L.

Acta Societatis Botanicorum Poloniae, 2014
It is shown that callose synthesis in the Oenothera biennis pollen tube is regulated by the endogenous Ca2+ level. Calcium antagonists reduced the amount of callose in the wall above the tip of the pollen tube (Verapamil - calcium channels blocker) and ...
Elżbieta Bednarska
doaj   +1 more source

OsSNDP3 Functions for the Polar Tip Growth in Rice Pollen Together with OsSNDP2, a Paralog of OsSNDP3

Rice, 2022
Understanding pollen tube growth is critical for crop yield maintenance. The pollen tube provides a path for sperm cells for fertilization with egg cells.
Sunok Moon, Yu-Jin Kim, Ha Eun Park, Junhyup Kim, Yun Shil Gho, Woo-Jong Hong, Eui-Jung Kim, Su Kyoung Lee, Byung-Chang Suh, Gynheung An, Ki-Hong Jung   +10 more
doaj   +1 more source

The Long Journey of Pollen Tube in the Pistil

International Journal of Molecular Sciences, 2018
In non-cleistogamous plants, the male gametophyte, the pollen grain is immotile and exploits various agents, such as pollinators, wind, and even water, to arrive to a receptive stigma. The complex process of pollination involves a tubular structure, i.e.,
Yang Zheng, Xian-Ju Lin, Huimin Liang, Fangfei Wang, Li-Yu Chen   +4 more
semanticscholar   +1 more source

Nuclear Entanglement: New Insights Into the Role of Cytoskeleton and Nucleoskeleton in Plant Nuclear Function

Cytoskeleton, EarlyView.
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, Katelyn Amstutz, Lily A. Schumacher, Iris Meier   +3 more
wiley   +1 more source

Exocytosis-coordinated mechanisms for tip growth underlie pollen tube growth guidance

Nature Communications, 2017
Many tip-growing cells are capable of responding to guidance cues, during which cells precisely steer their growth toward the source of guidance signals.
Nan Luo, An Yan, Gang Liu, Jingzhe Guo, Duoyan Rong, M. Kanaoka, Zhentao Xiao, Guanshui Xu, T. Higashiyama, Xinping Cui, Zhenbiao Yang   +10 more
semanticscholar   +1 more source

In Vitro Live Cell Imaging Reveals Nuclear Dynamics and Role of the Cytoskeleton During Asymmetric Division of Pollen Mitosis I in Nicotiana Benthamiana

Cytoskeleton, EarlyView.
ABSTRACT Pollen is a male gametophyte of angiosperms. Following meiosis, the microspore undergoes an asymmetric division called pollen mitosis I (PMI), which produces two cells of different sizes: a large vegetative cell and a small generative cell. Polarized nuclear migration and positioning during PMI are important for successful pollen development ...
Yoko Mizuta, Masako Igarashi, Tomomi Shinagawa, Ikuma Kaneshiro, Haoto Anan, Daisuke Kurihara   +5 more
wiley   +1 more source

Badania biologii pyłku wytwarzanego przez kwiaty wiśni zakwitajace w różnych fazach kwitnienia [Studies of the biology of pollen formed by sour cherry flowers flowering in different stages of the blooming period]

Acta Agrobotanica, 2015
During four years (1971-1974), five sour cherry cultivars were examined for the pollen viability, germination and pollen tube growth. Pollen which was taken from the earliest and the last blooming stages had the smaller viability, germination and the ...
Stanisław Wociór
doaj   +1 more source

Beeswax: Food and beyond

Food Biomacromolecules, EarlyView.
Abstract Honeybees (Apis mellifera L.) are an important class of insects that are the most beneficial in terms of economy. Beeswax is the second most important bee products after honey. Its commercial importance is due to its antimicrobial, antioxidant, anti‐inflammatory and antiseptic as well as regenerative properties.
Rajshri Naveen, Manickam Loganathan
wiley   +1 more source