Aberrant protein phosphatase 2C leads to abscisic acid insensitivity and high transpiration in parasitic Striga

Nature Plants
Hijiri FujiokaYukihiro Sugimoto

Abstract

Striga parasitizes major crops in arid regions, depriving the host crop of nutrients through the transpiration stream and causing vast agricultural damage. Here, we report on the mechanism underlying how Striga maintains high transpiration under drought conditions. We found that Striga did not respond to abscisic acid, the phytohormone responsible for controlling stomatal closure. Protein phosphatase 2C of Striga (ShPP2C1) is not regulated by abscisic acid receptors, and this feature is attributable to specific mutations in its amino acid sequence. Moreover, Arabidopsis transformed with ShPP2C1 showed an abscisic acid-insensitive phenotype, indicating that ShPP2C1 functions as a dominant negative regulator of abscisic acid signal transduction. These findings suggest that ShPP2C1 interrupts abscisic acid signalling in Striga, resulting in high transpiration and subsequent efficient absorption of host nutrients under drought conditions.

References

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Citations

Jul 18, 2019·Plant, Cell & Environment·Govinal Badiger BhaskaraPaul E Verslues
Oct 13, 2019·Physiologia Plantarum·Frank FörsteKirsten Krause
Nov 21, 2019·Proceedings of the National Academy of Sciences of the United States of America·Yufei SunAssaf Mosquna
Aug 6, 2020·Frontiers in Plant Science·Yufei SunAssaf Mosquna
Apr 26, 2019·Scientific Reports·Gil WiseglassAssaf Mosquna
Apr 10, 2020·Annals of Botany·Igor CesarinoMarc Somssich
Apr 16, 2019·Plant Signaling & Behavior·Hijiri FujiokaYukihiro Sugimoto
Nov 18, 2020·The New Phytologist·J Musembi MutukuKen Shirasu
Feb 3, 2021·Journal of Experimental Botany·Irene Garcia-MaquilonPedro L Rodriguez
Sep 17, 2019·Current Biology : CB·Satoko YoshidaKen Shirasu
Apr 2, 2021·Plant Physiology·Guillaume BrunPhilippe Delavault
Jun 3, 2021·Plants·Rafael Ruiz-PartidaJorge Lozano-Juste
Mar 31, 2021·Plant Physiology·Kaori Miyashima FurutaSatoko Yoshida

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Methods Mentioned

BETA
transgenic
chemical treatment

Software Mentioned

InfReC Analyzer NS9500
Striga

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