We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
喷施拉肖皂苷C提高烟草幼苗抗干旱胁迫能力的生理机制.
- Authors
丁丹阳; 张艺洁; 王凯悦; 刘志宏; 鲁宇童; 邵惠芳
- Abstract
In order to reveal the physiological mechanism of laxogenin C (LG-C), which has the function of brassinosteroids and improving tobacco drought resistance, this paper took variety Yuyan 10 as material, conducted hydroponic experiment by spraying on leaf surface; and detected the effects of spraying LG-C on membranous peroxide level, osmotic regulation substances content, antioxidant enzyme activity, and photosynthetic characteristics of tobacco seedlings under drought stress. The results showed that drought stress treatment increased the leaf malondialdehyde (MDA) content of tobacco seedlings, improved the activity of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and the content of soluble protein, proline, and soluble sugar, while the photosynthesis was restrained. Spraying exogenous LG-C under drought stress had improved the activity of SOD, POD, CAT and the accumulation of osmotic regulation substances; increased the chlorophyll content, photosynthetic rate and leaf moisture content; reduced MDA content and relative conductivity. Therefore, LG-C could alleviate the harm of drought stress on tobacco seedlings by accumulating osmotic substances, increasing activity of antioxidant enzymes, removing peroxide, and enhancing photosynthetic ability.
- Subjects
OSMOREGULATION; SUPEROXIDE dismutase; PHYSIOLOGY; PHOTOSYNTHETIC rates; BRASSINOSTEROIDS; CATALASE; CHLOROPHYLL
- Publication
Journal of Agricultural Science & Technology (1008-0864), 2018, Vol 20, Issue 12, p36
- ISSN
1008-0864
- Publication type
Article
- DOI
10.13304/j.nykjdb.2017.0843