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Nitric oxide deficiency decreases C-repeat binding factor-dependent and -independent induction of cold acclimation.


ABSTRACT: Plant tolerance to freezing temperatures is governed by endogenous components and environmental factors. Exposure to low non-freezing temperatures is a key factor in the induction of freezing tolerance in the process called cold acclimation. The role of nitric oxide (NO) in cold acclimation was explored in Arabidopsis using triple nia1nia2noa1-2 mutants that are impaired in the nitrate-dependent and nitrate-independent pathways of NO production, and are thus NO deficient. Here, we demonstrate that cold-induced NO accumulation is required to promote the full cold acclimation response through C-repeat Binding Factor (CBF)-dependent gene expression, as well as the CBF-independent expression of other cold-responsive genes such as Oxidation-Related Zinc Finger 2 (ZF/OZF2). NO deficiency also altered abscisic acid perception and signaling and the cold-induced production of anthocyanins, which are additional factors involved in cold acclimation.

SUBMITTER: Costa-Broseta A 

PROVIDER: S-EPMC6598078 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Nitric oxide deficiency decreases C-repeat binding factor-dependent and -independent induction of cold acclimation.

Costa-Broseta Álvaro Á   Perea-Resa Carlos C   Castillo Mari-Cruz MC   Ruíz M Fernanda MF   Salinas Julio J   León José J  

Journal of experimental botany 20190601 12


Plant tolerance to freezing temperatures is governed by endogenous components and environmental factors. Exposure to low non-freezing temperatures is a key factor in the induction of freezing tolerance in the process called cold acclimation. The role of nitric oxide (NO) in cold acclimation was explored in Arabidopsis using triple nia1nia2noa1-2 mutants that are impaired in the nitrate-dependent and nitrate-independent pathways of NO production, and are thus NO deficient. Here, we demonstrate th  ...[more]

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