| Autor: |
Shi Y; College of Agriculture, Guangxi University, Nanning 530004, China., Zhang D; College of Agriculture, Guangxi University, Nanning 530004, China., Liang R; College of Agriculture, Guangxi University, Nanning 530004, China., Xiao D; College of Agriculture, Guangxi University, Nanning 530004, China.; Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Guangxi University, Nanning 530004, China.; Key Laboratory of Crop Cultivation and Tillage, Guangxi University, Nanning 530004, China., Wang A; College of Agriculture, Guangxi University, Nanning 530004, China.; Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Guangxi University, Nanning 530004, China.; Key Laboratory of Crop Cultivation and Tillage, Guangxi University, Nanning 530004, China., He L; College of Agriculture, Guangxi University, Nanning 530004, China.; Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Guangxi University, Nanning 530004, China.; Key Laboratory of Crop Cultivation and Tillage, Guangxi University, Nanning 530004, China., Zhan J; College of Agriculture, Guangxi University, Nanning 530004, China.; Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Guangxi University, Nanning 530004, China.; Key Laboratory of Crop Cultivation and Tillage, Guangxi University, Nanning 530004, China. |
| Abstrakt: |
Aluminum (Al 3+ ) toxicity in acidic soils reduces root growth and can lead to a considerable reduction in peanut plants ( Arachis hypogea L.). The caseinolytic protease (Clp) system plays the key role in abiotic stress response. However, it is still unknown whether it is involved in peanut response to Al 3+ stress. The results from this study showed that Adenosine 5'-triphosphate (ATP)-dependent caseinolytic protease proteolytic subunit 6 (AhClpP6) in peanut plants was involved in the Al 3 stress response through its effects on leaf photosynthesis. The AhClpP6 expression levels in the leaf and stem significantly increased with the Al 3+ treatment times. Knockdown AhClpP6 peanut lines accumulated significantly more Al 3+ when exposed to Al 3+ stress, which reduced leaf photosynthesis. Furthermore, in response to Al 3+ treatment, knockdown of AhClpP6 resulted in a flattened shape of chloroplasts, disordered and flattened thylakoid, and accumulating more starch grains than those of the wild-type (WT) peanut lines. Taken together, our results suggest that AhClpP6 regulates Al 3+ tolerance by maintaining chloroplast integrity and enhancing photosynthesis. |
