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- Title
Effects of exogenous Ca<sup>2+</sup> on leaf photosynthetic apparatus and active oxygen scavenging enzyme system of chrysanthemum under high temperature stress.
- Authors
Sun, X. Z.; Guo, X. F.; Zheng, C. S.; Wang, W. L.; Liang, F.
- Abstract
Taking cut flower chrysanthemum 'Jinba' as test material, the effects of exogenous Ca2+ on its photosynthetic system and antioxidant enzyme activities under high temperature stress were investigated, with the possible action mechanisms of 2+ discussed. The results showed that under high temperature stress, Ca2+ addition greatly inhibited the net photosynthesis rate (Pn) and quantum yield of PS II electron transport (ΦPS II). After 24 h treatment, the Pn and ΦPS II were increased by 31.11% and 21.88% , respectively, and the initial fluorescence (Fo) decreased by 13.19%, compare with the control. Ca2+ addition also greatly enhanced the activities of SOD, POD and CAT, and thus, the active oxygen was scavenged timely. After 24 h treatment, the MDA accumulation and REC were 29.20% and 35.81% lower than the control, respectively. In conclusion, Ca2+ addition could efficiently protect chrysanthemum leaves from the damage in photosynthetic apparatus under short-term high temperature stress.
- Subjects
CUT flowers; CHRYSANTHEMUMS; PHOTOSYNTHESIS; PHOTOSYNTHETIC bacteria; TEMPERATURE; ANTIOXIDANTS; ENZYMES; ELECTRON transport; HORTICULTURAL products
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2008, Vol 19, Issue 9, p1983
- ISSN
1001-9332
- Publication type
Article