Details

Autor(en) / Beteiligte

• Liu, Minmin
• Yu, Huiyang
• Ouyang, Bo
• Shi, Chunmei
• Demidchik, Vadim
• Hao, Zhifeng
• Yu, Min
• Shabala, Sergey

Titel

NADPH oxidases and the evolution of plant salinity tolerance

Ist Teil von

• Plant, cell and environment, 2020-12, Vol.43 (12), p.2957-2968

Ort / Verlag

Chichester, UK: John Wiley & Sons, Ltd

Erscheinungsjahr

2020

Quelle

Access via Wiley Online Library

Beschreibungen/Notizen

• Soil salinization is a major threat to global food security and the biodiversity of natural ecosystems. To adapt to salt stress, plants rely on ROS‐mediated signalling networks that operate upstream of a broad array of physiological and genetic processes. A key player in ROS signalling is NADPH oxidase, a plasma‐membrane‐bound enzyme encoded by RBOH genes. In this study, we have conducted a comprehensive bioinformatic analysis of over 50 halophytic and glycophytic species to link the difference in the kinetics of ROS signalling between contrasting species with the abundance and/or structure of NADPH oxidases. The RBOH proteins were predicted in all the tested plant lineages except some algae species from the Rhodophyta, Chlorophyta and Streptophyta. Within the glycophytic group, the number of RBOH copies correlated negatively with salinity stress tolerance, suggesting that a reduction in the number of RBOH isoforms may be potentially related to the evolution of plant salinity tolerance. While halophytes did not develop unique protein families during evolution, they evolved additional phosphorylation target sites at the N‐termini of NADPH oxidases, potentially modulating enzyme activity and allowing more control over their function, resulting in more efficient ROS signalling and adaptation to saline conditions. Halophytes evolved additional phosphorylation target sites at N‐terminus of NADPH oxidase, potentially modulating enzyme activity and allowing more control over its function needed for more efficient ROS signalling and adaptation to conditions of high salinity.