Physiological and anatomical changes in two rapeseed (Brassica napus L.) genotypes under drought stress conditions |
| |
Authors: | Jiacheng Zhu Dongfang Cai Jianping Wang Jinhua Cao Yancheng Wen Junping He Lei Zhao Dongguo Wang Shufen Zhang |
| |
Affiliation: | Industrial Crops Research Institute, Henan Academy of Agricultural Sciences, Key Laboratory of Oil Crops in Huanghuaihai Plains, Ministry of Agriculture, Key Laboratory of Oil Crop Genetic Improvement in Henan Province, Zhengzhou, Henan, 450002, China |
| |
Abstract: | Understanding the mechanisms of drought resistance in crop species is crucial for the selection and breeding of tolerant rapeseed (Brassica napus L.) varieties. The present study aimed to assess the physiological and anatomical responses of two rapeseed genotypes, P287 (drought-tolerant) and T88 (drought-sensitive) under three intensities of drought stress. All physiological and anatomical parameters related to drought acclimation were significantly altered in both genotypes under stress conditions. At the fourth-leaf stage, the relative water content, chlorophyll content, protein content, malondialdehyde content, and the activities of peroxidase and catalase in P287 were significantly higher than those in T88, particularly under severe drought conditions. After rehydration, all physiological indexes recovered rapidly, especially in P287. In addition, under drought stress, compared with T88, P287 had thicker palisade tissue, thinner spongy tissue, higher ratio of chloroplast length to chloroplast width, higher stomatal density and stomatal closure rate. Overall, the interaction between physiological and anatomical features improved the drought tolerance of P287 under drought stress conditions. |
| |
Keywords: | Drought stress Water recovery Physiological parameters |
本文献已被 ScienceDirect 等数据库收录! |
|