Plasma membrane H+-ATPases sustain pollen tube growth and ... - Nature
2020年5月14日 · Pollen tubes are highly polarized tip-growing cells that depend on cytosolic pH gradients for signaling and growth. Autoinhibited plasma membrane proton (H +) ATPases (AHAs) have been proposed...
Mechanics of Pollen Tube Elongation: A Perspective - Frontiers
2020年10月19日 · The pollen tube (PT) is a unique and specialized structure in plants. Its sole purpose is to deliver sperm cells to the female gametophyte for double fertilization. Essentially, it is a thread–like structure spanning from the pollen shell toward the tip.
Pollen Tube Guidance: Growing straight through walls - eLife
2020年9月1日 · Pollen tubes first grow within the cell wall of the papilla cells, applying pressure to the cell. Mechanical forces are known to play a major role in plant cell shape by controlling the orientation of cortical microtubules (CMTs), which in turn mediate deposition of cellulose microfibrils (CMFs).
Bioenergetics of pollen tube growth in - Nature
2022年12月19日 · Pollen tube is the fastest-growing plant cell. Its polarized growth process consumes a tremendous amount of energy, which involves coordinated energy fluxes between plastids, the cytosol, and...
Mechanics and hydraulics of pollen tube growth - Dumais - 2021
2021年9月7日 · For pollen tubes, tip growth is how the male gametophyte reaches the ovule nestled deep into the pistil of the flower to achieve fertilisation (Williams et al., 2016). Tip growth is the morphogenetic strategy adopted by walled cells whenever their function requires growing within a complex mechanical environment.
Keeping pollen tubes on track - Nature Plants
2020年2月13日 · A pollen tube’s journey starts at the stigma, where it emerges from a hydrated pollen grain, grows into the transmitting tract of the pistil and is later attracted by an ovule. During this...
Observing the growth of pollen tubes - practicalbiology.org
Pollen tube growth is a surprisingly rapid process in certain conditions, and the pace of growth is measurable under a microscope during the course of a (double) lesson. Simple observations of the diversity of pollen grains can lead to discussions about allergic reactions to different pollens, and to mechanisms ensuring fertilisation of ovules ...
Enhanced pollen tube performance at high temperature …
5 天之前 · Pollen tubes are critical for crop production and are sensitive to high-temperature stress. Ouonkap et al. use tomato as a model to show that thermotolerant pollen tube growth contributes to crop productivity at high temperature. Enhanced pollen tube ROS homeostasis and callose synthesis are key features of thermotolerant cultivars.
Cell mechanics of pollen tube growth - ScienceDirect
2018年8月1日 · The pollen tube features particular traits that can only be understood when integrating cell biological with cell mechanical concepts. Firstly, regular temporal variations in the growth rate are governed by a feedback mechanism …
ALA3 regulates pollen tube growth and guidance by keeping …
The pollen tube’s path is guided by a range of molecular attractants. These small signaling peptides are perceived by pollen-specific receptor-like kinases (PRKs), which activate signaling pathways required for the growth and steering of the pollen tube toward the female gametophyte. Members of the Arabidopsis PRK family are differentially ...
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