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- Title
Paclobutrazol Can Enhance the Thermal-Tolerant on Herbaceous Peony (Paeonia lactiflora).
- Authors
Meng, J. S.; Li, M.; Hao, Z. J.; Zhao, D. Q.; Tao, J.
- Abstract
As an excellent ornamental flower, herbaceous peony (Paeonia lactiflora Pall.) was introduced to south region of the Yangtze River with continuous high temperature in summer. However, herbaceous peony is adaptable to cool and dry environment but not adaptable to high temperature in summer. Therefore, how to alleviate the high temperature stress injury to herbaceous peony is an urgent problem to be solved. In this study, the effects of exogenous paclobutrazol (PBZ) on alleviate the high temperature stress injure to herbaceous peony were examined under high temperature stress. The results showed that exogenous PBZ treatment on herbaceous peony under high temperature can reduce the electrolyte leakage rate and the degree of membrane lipid peroxidation, restrain the production of superoxide anion () and the hydrogen peroxide (H2O2), and increase the activities of catalase (CAT) and superoxide dismutase (SOD). Additionally, comprised with control, exogenous PBZ could improve the photosynthesis, reduce the damage degree of cell structure. Moreover, PBZ induced high temperature-tolerant related genes expression to different degrees. These results indicated that PBZ decreased the deleterious effect of high temperature stress on herbaceous peony growth by reducing membrane lipid peroxidation, activating photosynthesis, and protecting cell structures. These findings indicate the crucial role of PBZ in high temperature stress mitigation and its potential application for managing high temperatures in herbaceous peony cultivation.
- Subjects
LIPID peroxidation (Biology); PACLOBUTRAZOL; MEMBRANE lipids; PEONIES; HIGH temperatures; SUPEROXIDE dismutase; HYDROGEN peroxide
- Publication
Russian Journal of Plant Physiology, 2022, Vol 69, Issue 3, p1
- ISSN
1021-4437
- Publication type
Article
- DOI
10.1134/S1021443722030104