Effects of 1-methylcyclopropene on ascorbate-glutathione cycle enzyme activities of postharvest Dendrobium 'Khao Sanan'

被引:0
作者
Chuchoisuwan, P. [1 ]
Sukpitak, C. [1 ]
Jongsri, P. [1 ]
Obsuwan, K. [2 ]
Seraypheap, K. [1 ]
机构
[1] Chulalongkorn Univ, Fac Sci, Ctr Excellence Environm & Plant Physiol, Dept Bot, Bangkok 10330, Thailand
[2] Silpakorn Univ, Fac Sci, Dept Biol, Sanam Chandra Palace Campus, Mueang 73000, Nakhon Pathom, Thailand
来源
III INTERNATIONAL ORCHID SYMPOSIUM | 2019年 / 1262卷
关键词
flower senescence; vase life; antioxidant enzyme; hydrogen peroxide; ethylene; FLOWER ABSCISSION; ANTIOXIDANTS; SENESCENCE; ETHYLENE; 1-MCP; BUD;
D O I
10.17660/ActaHortic.2019.1262.29
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
White orchids, especially Dendrobium 'Khao Sanan', are amongst the most important cut flowers in Thailand. However, owing to the effects of ethylene, such orchids experience rapid flower senescence. This presents a serious problem with regard to the exportability of quality flowers in the cut orchid industry. Following harvesting, 1-methylcyclopropene (1-MCP) is used to inhibit ethylene; thus, the aim of the present study was to determine the effects of 1-MCP on ascorbate-glutathione cycle enzyme activities in Dendrobium 'Khao Sanan'. We treated the inflorescences of white orchids with 0.5 mu L L-1 1-MCP for 3 h and/or 0.4 mu L L-1 ethylene for 24 h. The ascorbate-glutathione cycle underwent a significant increase in the activities of dehydroascorbate reductase (DHAR) and glutathione reductase (GR) in the 1-MCP-treated flowers. These results suggest that 1-MCP has the ability to stimulate certain antioxidant enzymes via the ascorbate-glutathione cycle in Dendrobium 'Khao Sanan', and may be used to retard senescence in this cultivar.
引用
收藏
页码:219 / 224
页数:6
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