Elevated Carbon Dioxide Alleviates Aluminum Toxicity by Decreasing Cell Wall Hemicellulose in Rice (Oryza sativa).

ABSTRACT: Carbon dioxide (CO₂) is involved in plant growth as well as plant responses to abiotic stresses; however, it remains unclear whether CO₂ is involved in the response of rice (Oryza sativa) to aluminum (Al) toxicity. In the current study, we discovered that elevated CO₂ (600 μL·L^-1) significantly alleviated Al-induced inhibition of root elongation that occurred in ambient CO₂ (400 μL·L^-1). This protective effect was accompanied by a reduced Al accumulation in root apex. Al significantly induced citrate efflux and the expression of OsALS1, but elevated CO₂ had no further effect. By contrast, elevated CO₂ significantly decreased Al-induced accumulation of hemicellulose, as well as its Al reten

SUBMITTER: Zhu XF 

PROVIDER: S-EPMC5513963 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature