What question did this study set out to answer?

To determine whether Group A protein phosphatases type 2C (PP2C) mediate intrinsic desiccation tolerance and abscisic acid signalling in the moss Physcomitrella patens.

July 31, 2013Nature CommunicationsOpen Access

Group A PP2Cs evolved in land plants as key regulators of intrinsic desiccation tolerance

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Authors

KKKenji KomatsuKyoto University NSNorihiro SuzukiShowa University MKMayuri KuwamuraTokyo University of Agriculture

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Implication

Experimental study reveals desiccation survival without abscisic acid following Group A PP2C deletion in Physcomitrella patens, suggesting an evolutionary brake on drought tolerance.

Key Points

To determine whether Group A protein phosphatases type 2C (PP2C) mediate intrinsic desiccation tolerance and abscisic acid signalling in the moss Physcomitrella patens.
Generated and evaluated Physcomitrella patens loss-of-function mutants lacking Group A PP2C for survival under full desiccation conditions in the absence of abscisic acid.
Conducted microarray expression profiling to compare Group A PP2C-regulated transcripts with abscisic acid-inducible gene sets.
Assayed abscisic acid-activated kinase activity in mutant moss to determine whether PP2C acts upstream or downstream of key kinases.
Elimination of Group A PP2C was sufficient to confer survival to complete desiccation without abscisic acid supplementation, although vegetative growth was severely hindered.
Microarray analysis revealed that genes regulated by Group A PP2C exclusively overlapped with transcripts showing high levels of abscisic acid induction.
Disruption of Group A PP2C weakly affected abscisic acid-activated kinase activity, demonstrating that Group A PP2C acts downstream of these kinases in moss.

Cite This Study

Komatsu et al. (2013) studied this question.

synapsesocial.com/papers/6a96e68833d7b00ae7bba546 https://doi.org/10.1038/ncomms3219

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Implication

Experimental study reveals desiccation survival without abscisic acid following Group A PP2C deletion in Physcomitrella patens, suggesting an evolutionary brake on drought tolerance.

Group A PP2Cs evolved in land plants as key regulators of intrinsic desiccation tolerance

Discussion

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Implication

Key Points

Cite This Study

Group A PP2Cs evolved in land plants as key regulators of intrinsic desiccation tolerance

Discussion

Member takes

Implication

Key Points

Cite This Study

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