Home > Archive>Volume 27, Issue 4, 2019 >439-445. DOI:10.11926/jtsb.3989
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Effects of GA3 and Spd on Photosynthetic Characteristics and Antioxidant System during Florescence in Rhododendron simsii
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    Abstract:

    In order to understand the effects of exogenous GA3 and Spd on florescence and flowering quality of Rhododendron simsii, the changes in photosynthetic characters and antioxidant system during the flowering period were studied. The results showed that GA3 had a significant ahead effect on florescence, while Spd delayed. Both of GA3 and Spd could prolong florescence, increase flower diameter and flowering formation rate. Both of GA3 and Spd significantly promoted photosynthetic rate (Pn), stomatal conductance (Gs) and intercellular CO2 concentration (Ci). The transpiration rate (Tr) increased by GA3, but inhibited by Spd. Both of GA3 and Spd had relieve effect on decline of chlorophyll content at the end of the flowering. MDA content in petals significantly decreased treated with GA3 and Spd, and the activities of SOD, POD and CAT increased. At the same time, The decrease of SOD activity in the end flowering stage was slowed down treated with GA3 and Spd, relieved the ageing process, and extended the flowering. In conclusion, it was better with 1 600 mg L-1 GA3 and 0.10 mmol L-1 Spd, could improve effectively the quality of flowers.

    Reference
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徐倩,李华雄,黄文沛,鲜小林,李青,赵胤,陈睿,潘远智. GA3和Spd对杜鹃开花期光合特性和抗氧化系统的影响[J].热带亚热带植物学报,2019,27(4):439~445

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  • Received:September 03,2018
  • Revised:October 28,2018
  • Online: August 08,2019
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