Increased Rubisco content in maize mitigates chilling stress and speeds recovery.

ABSTRACT: Many C₄ plants, including maize, perform poorly under chilling conditions. This phenomenon has been linked in part to decreased Rubisco abundance at lower temperatures. An exception to this is chilling-tolerant Miscanthus, which is able to maintain Rubisco protein content under such conditions. The goal of this study was to investigate whether increasing Rubisco content in maize could improve performance during or following chilling stress. Here, we demonstrate that transgenic lines overexpressing Rubisco large and small subunits and the Rubisco assembly factor RAF1 (RAF1-LSSS), which have increased Rubisco content and growth under control conditions, maintain increased Rubisco content and growth during chilling stress. RAF1-LSSS plants exhibited 12% higher CO₂ assimi

SUBMITTER: Salesse-Smith CE 

PROVIDER: S-EPMC7207003 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature