Activation tagging of Arabidopsis POLYGALACTURONASE INVOLVED IN EXPANSION 2 promotes hypocotyl elongation, leaf expansion, stem lignification, mechanical stiffening, and lodging

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Activation tagging of Arabidopsis POLYGALACTURONASE INVOLVED IN EXPANSION2 promotes hypocotyl elongation, leaf expansion, stem lignification, mechanical stiffening, and lodging.

Pectin is the most abundant component of primary cell walls in eudicot plants. The modification and degradation of pectin affects multiple processes during plant development, including cell expansion, organ initiation, and cell separation. However, the extent to which pectin degradation by polygalacturonases affects stem development and secondary wall formation remains unclear. Using an activat...

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High temperature promotes auxin-mediated hypocotyl elongation in Arabidopsis.

Physiological studies with excised stem segments have implicated the plant hormone indole-3-acetic acid (IAA or auxin) in the regulation of cell elongation. Supporting evidence from intact plants has been somewhat more difficult to obtain, however. Here, we report the identification and characterization of an auxin-mediated cell elongation growth response in Arabidopsis thaliana. When grown in ...

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Mobile gibberellin directly stimulates Arabidopsis hypocotyl xylem expansion.

Secondary growth of the vasculature results in the thickening of plant structures and continuously produces xylem tissue, the major biological carbon sink. Little is known about the developmental control of this quantitative trait, which displays two distinct phases in Arabidopsis thaliana hypocotyls. The later phase of accelerated xylem expansion resembles the secondary growth of trees and is ...

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POLYGALACTURONASE INVOLVED IN EXPANSION1 functions in cell elongation and flower development in Arabidopsis.

Pectins are acidic carbohydrates that comprise a significant fraction of the primary walls of eudicotyledonous plant cells. They influence wall porosity and extensibility, thus controlling cell and organ growth during plant development. The regulated degradation of pectins is required for many cell separation events in plants, but the role of pectin degradation in cell expansion is poorly defin...

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Arabidopsis microtubule destabilizing protein40 is involved in brassinosteroid regulation of hypocotyl elongation.

The brassinosteroid (BR) phytohormones play crucial roles in regulating plant cell growth and morphogenesis, particularly in hypocotyl cell elongation. The microtubule cytoskeleton is also known to participate in the regulation of hypocotyl elongation. However, it is unclear if BR regulation of hypocotyl elongation involves the microtubule cytoskeleton. In this study, we demonstrate that BRs me...

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ژورنال

عنوان ژورنال: The Plant Journal

سال: 2017

ISSN: 0960-7412,1365-313X

DOI: 10.1111/tpj.13453