干旱胁迫对速生刺槐‘民刺1号’光合及生理特征的影响

为研究速生刺槐‘民刺 1 号’的抗干旱能力，对比6 个刺槐品系(‘民刺 1 号’、‘豫刺 1 号’、M3、M24、R5、M30)在持续干旱胁迫下的生理响应。 结果：持续干旱胁迫下，‘民刺 1号’和‘豫刺 1 号’叶片 Pn 保持在相对较高的水平，叶片 Pn 、Tr 的降低及产生气孔限制和非气孔限制的时间均迟于其他品种，两者土壤含水量临界值分别仅为 3. 75% 和 4. 04% ，低于其他刺槐品种 20. 32% 以上，‘民刺 1 号’和‘豫刺 1 号’叶片 MDA、游离脯氨酸含量相对较低，达到峰值时间迟于其他品种；‘民刺 1 号’、M3 和‘豫刺 1 号’叶片 SOD、POD 活性始终高于其他刺槐品种,出现峰值时间相对滞后。 综合评价抗干旱能力为:‘民刺 1 号’ >‘豫刺 1 号’ > M3 > M30 > R5 > M24。To investigate the drought resistance of fast-growing Robinia pseudoacacia 'Minci 1', a comparative analysis was conducted on the physiological responses of six Robinia pseudoacacia lines ('Minci 1', 'Yuci 1', M3, M24, R5, M30) under continuous drought stress. Results: Under continuous drought stress, 'Minci 1' and 'Yuci 1' maintained relatively high leaf net photosynthetic rate (Pn). The reductions in leaf Pn and transpiration rate (Tr), as well as the timing of stomatal and non-stomatal limitations occurring, were delayed compared to other varieties. Their critical soil water contents were merely 3.75% and 4.04% respectively, which were over 20.32% lower than those of other Robinia pseudoacacia varieties. The leaf malondialdehyde (MDA) and free proline contents of 'Minci 1' and 'Yuci 1' were relatively low, and the time taken to reach their peak levels was later than that of other varieties. The activities of leaf superoxide dismutase (SOD) and peroxidase (POD) in 'Minci 1', M3 and 'Yuci 1' remained consistently higher than those of other Robinia pseudoacacia lines, with their peak occurrence times relatively delayed. The comprehensive drought resistance ranking is as follows: 'Minci 1' > 'Yuci 1' > M3 > M30 > R5 > M24.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于评估速生刺槐‘民刺1号’的抗干旱能力，通过对比六个刺槐品系在持续干旱胁迫下的光合及生理特征响应。研究结果显示，‘民刺1号’在光合效率、生理指标及综合抗干旱能力上表现突出，属于‘油松等速生建筑材林高效培育技术研究’项目的一部分。