Connecting Homogalacturonan-Type Pectin Remodeling to Acid Growth

被引：172

作者：

Hocq, Ludivine ^{[1
]}

Pelloux, Jerome ^{[1
]}

Lefebvre, Valerie ^{[1
]}

机构：

[1] Univ Picardie, Biol Plantes & Innovat BIOPI EA3900, SFR Condorcet Ctr Natl Rech Sci CNRS 3417, 33 Rue St Leu, F-80039 Amiens, France

来源：

TRENDS IN PLANT SCIENCE | 2017年 / 22卷 / 01期

关键词：

MEMBRANE H+-ATPASE; CELL ELONGATION; POLYELECTROLYTE BEHAVIOR; ACTION PATTERNS; PH; METHYLESTERASE; AUXIN; ROOT; METHYLESTERIFICATION; CALCIUM;

D O I：

10.1016/j.tplants.2016.10.009

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

According to the 'acid growth theory', cell wall acidification controls cell elongation, therefore plant growth. This notably involves changes in cell wall mechanics through modifications of cell wall polysaccharide structure. Recently, advances in cell biology showed that changes in cell elongation rate can be mediated by the remodeling of pectins, and in particular of homogalacturonans (HGs). Their demethylesterification appears to be a key element controlling the chemistry and the rheology of the cell wall. We postulate that precise and dynamic modulation of extracellular pH plays a central role in the control of HG-modifying enzyme activities, and in particular those of pectin methylesterases and polygalacturonases. We propose that acid growth requires dynamic HG remodeling through the tight control of cell wall pH.

引用

页码：20 / 29

页数：10

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