scholarly journals Plasma membrane H + ‐ATPases‐mediated cytosolic proton gradient regulates pollen tube growth

2020 ◽  
Vol 62 (12) ◽  
pp. 1817-1822 ◽  
Author(s):  
Wei Chen ◽  
Peng‐Fei Jia ◽  
Wei‐Cai Yang ◽  
Hong‐Ju Li
Keyword(s):  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Proton Gradient ◽  
Tube Growth

scholarly journals Plasma membrane H+-ATPases sustain pollen tube growth and fertilization

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Robert D. Hoffmann ◽  
Maria Teresa Portes ◽  
Lene Irene Olsen ◽  
Daniel Santa Cruz Damineli ◽  
Maki Hayashi ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth

pH modulates interaction of 14-3-3 proteins with pollen plasma membrane H+ ATPases independently from phosphorylation

2021 ◽  
Author(s):  
Heidi Pertl-Obermeyer ◽  
Ana Gimeno ◽  
Verena Kuchler ◽  
Evrim Servili ◽  
Shuai Huang ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Pollen Grains ◽  
Tube Growth ◽  
In Vitro Assays ◽  
Sudden Increase ◽  
Ph Gradients ◽  
Threonine Residue

Abstract Pollen grains transport the sperm cells through the style tissue via a fast-growing pollen tube to the ovaries where fertilization takes place. Pollen tube growth requires a precisely regulated network of cellular as well as molecular events including the activity of the plasma membrane H+ ATPase, which is known to be regulated by reversible protein phosphorylation and subsequent binding of 14-3-3 isoforms. Immunodetection of the phosphorylated penultimate threonine residue of the pollen plasma membrane H+ ATPase (LilHA1) of Lilium longiflorum pollen revealed a sudden increase in phosphorylation with the start of pollen tube growth. In addition to phosphorylation, pH modulated the binding of 14-3-3 isoforms to the regulatory domain of the H+ ATPase, whereas metabolic components had only small effects on 14-3-3 binding, as tested with in vitro assays using recombinant 14-3-3 isoforms and phosphomimicking substitutions of the threonine residue. Consequently, local H+ influxes and effluxes as well as pH gradients in the pollen tube tip are generated by localized regulation of the H+ ATPase activity rather than by heterogeneous localized distribution in the plasma membrane.

scholarly journals A plant plasma membrane Ca2+ pump is required for normal pollen tube growth and fertilization

2004 ◽  
Vol 101 (25) ◽  
pp. 9502-9507 ◽  
Author(s):  
M. Schiott ◽  
S. M. Romanowsky ◽  
L. Baekgaard ◽  
M. K. Jakobsen ◽  
M. G. Palmgren ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth ◽  
Normal Pollen ◽  
Plant Plasma Membrane

scholarly journals The haustorial synergids of Cortaderia (Gramineae) at maturity

2014 ◽  
Vol 50 (1-2) ◽  
pp. 151-160 ◽  
Author(s):  
Melva N. Philipson
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Central Cell ◽  
Transfer Cell ◽  
Tube Growth ◽  
Transport Activity ◽  
Cell Cytoplasm ◽  
Cortaderia Selloana

The ultrastructure of synergids which extend through the micropyle as haustoria and lie against 'the ovary wall are described in <em>Cortaderia selloana</em> and its F<sub>l</sub> hybrid with <em>C. araucana</em>. These haustoria bear typical transfer cell wall invaginations closely associated with the plasma membrane and with mitochondria. Their function seems to be one involved in the absorption and conduction of nutrients to the synergids which are atypical in their highly vacuolate structure, degenerate nuclei and few organelles. The synergids appear to act as repositories of nutrients which are, readily accessible to the central cell by virtue of deep intrusions made into them by the central cell cytoplasm. Enzymatic secretion could also be a function of the distal end of the haustorial synergids, both in facilitating tissue peneration during its outward growth and in directing pollen tube growth. At anfhesis, the haustorium - synergid complex appears to be past its peak of absorption and transport activity, and to be involved in a seeretory or degenerative phase.

scholarly journals Spermidine oxidase-derived H2O2 regulates pollen plasma membrane hyperpolarization-activated Ca2+-permeable channels and pollen tube growth

2010 ◽  
Vol 63 (6) ◽  
pp. 1042-1053 ◽  
Author(s):  
Juyou Wu ◽  
Zhonglin Shang ◽  
Jun Wu ◽  
Xueting Jiang ◽  
Panagiotis N. Moschou ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth ◽  
Membrane Hyperpolarization ◽  
Spermidine Oxidase

scholarly journals MAPKs Influence Pollen Tube Growth by Controlling the Formation of Phosphatidylinositol 4,5-Bisphosphate in an Apical Plasma Membrane Domain

2017 ◽  
Vol 29 (12) ◽  
pp. 3030-3050 ◽  
Author(s):  
Franziska Hempel ◽  
Irene Stenzel ◽  
Mareike Heilmann ◽  
Praveen Krishnamoorthy ◽  
Wilhelm Menzel ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth ◽  
Apical Plasma Membrane ◽  
Membrane Domain ◽  
Plasma Membrane Domain

Inhibition of Pollen Tube Growth by Diffusate and Extract of Grape Pistils

1989 ◽  
Vol 58 (3) ◽  
pp. 515-521 ◽  
Author(s):  
Goro OKAMOTO ◽  
Ikuo SHIBUYA ◽  
Miwa FURUICHI ◽  
Kazuo SHIMAMURA
Keyword(s):  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth
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