›› 2017, Vol. 29 ›› Issue (4): 575-582.DOI: 10.3969/j.issn.1004-1524.2017.04.09

• Horticultural Science • Previous Articles     Next Articles

Physiological and biochemical characteristics of Curcuma alismatifolia bulbs and effects of some chemicals on its cold resistance

LIU Jianxin, XU Xiaohan, DING Huaqiao   

  1. Research and Development Centre of Flower, Zhejiang Academy of Agricultural Sciences, Hangzhou 311202, China
  • Received:2016-11-03 Online:2017-04-20 Published:2017-04-27

Abstract: Research and Development Centre of Flower, Zhejiang Academy of Agricultural Sciences, Hangzhou 311202, China)Abstact: Curcuma alismatifolia is a new kind of tropical flowers. However, winter in most areas in China is too cold to preserve bulbs naturally. In order to clarify cold-resistance physiology of Curcuma alismatifolia bulbs, and to find out methods to enhance bulbs cold-resistance, various physiological and biochemical indexes of bulbs which were treated with different low temperature stress were detected, and cold-resistance chemicals screening experiment for bulbs were carried out. The results of physiological and biochemical tests showed that Curcuma alismatifolia bulbs began to be stressed at 9 ℃. According to changes of antioxidant enzyme system and osmotic adjustment system, these bulbs mobilized their own stress-resistant system to resist adverse effects at 5 and 1 ℃, respectively, While various stress-resistant related indexes reduced to the lowest point at -3 ℃, which might be beyond the tolerance limit of bulbs. The cold-resistant chemicals screening experiment showed that all chemicals treatments including abscisic acid, salicylic acid, brassinolide, 6-BA, paclobutrazol could enhance cold tolerance of bulbs. According to cell damage degree analysis, 1 mg·L-1 ABA immerged bulbs for 24 h had the best protective effect to bulbs. 0.08 mg·L-1 6-BA treatment also could protect membrane permeability, but the oxidation degree of membrane lipid was very high.

Key words: Curcuma alismatifolia, Chiang Mai Pink, bulb, cold resistance, abscisic acid

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