›› 2018, Vol. 30 ›› Issue (7): 1168-1174.DOI: 10.3969/j.issn.1004-1524.2018.07.09

• Horticultural Science • Previous Articles     Next Articles

Physiological response to heat stress and heat resistances evaluation of 14 Capsicum varieties

HU Nengbing, PANG Dandan, SUI Yihu, SHU Yingjie, HE Keqin, ZHU Xiaomei   

  1. College of Agriculture, Anhui Science and Technology University, Fengyang 233100, China
  • Received:2017-08-11 Online:2018-07-20 Published:2018-08-02

Abstract: Under the heat stress of 38 ℃, the heat damage index and chlorophyll fluorescence parameters of 14 Capsicum varieties at different processing time (24, 48, 72 and 96 h) were studied, and furthermore their abilities of heat resistance were evaluated and the best Capsicum varieties were selected by dealing with the data above. The results showed that, with the increase of high temperature treatment time, the thermal damage index(TDI) and water loss rate(WLR) of pepper increased and fluorescence parameter of Fv/Fm decreased. It was concluded by the membership analysis method and the parameters of chlorophyll fluorescence method by heat injury index that variety 2, 6, 1 can be used as the germplasm resisting high temperature stress and variety 11, 10 would be eliminated, with the coincidence rate reached 75% of the two methods, which could screen the optimum combination and verify the reliability of the two methods.

Key words: heat stress, Capsicum annuum L., heat damage index, fluorescence parameter

CLC Number: