Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (1): 63-68.DOI: 10.3969/j.issn.1000-2561.2020.01.009

• Phytophysiology and Biochemistry • Previous Articles     Next Articles

Integrative Assessments on Physiological Response and Cold Tolerance of Different Sugarcane Varieties to Low Temperature

QUAN Yiji,FAN Xian,LI Rudan,YANG Shaolin,DENG Jun()   

  1. Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan, Yunnan 661600, China
  • Received:2019-06-24 Revised:2019-07-25 Online:2020-01-25 Published:2020-01-21
  • Contact: DENG Jun


Three sugarcane hybrid varieties (ROC22, Co281, KQ01-1390) and three original breeding varieties (28NG16, 57NG155, 96NG16) were used to assess the ability of cold tolerance through investigating the effects of low temperature on mature sugarcane appearance, relative permeability of leave plasma, contents of osmotic adjustment substances and activities of antioxidant enzymes in sugarcane stems. Treated at -3 ℃ for three days at nigh, symptoms such as withered and curly leaves, broken and black growth point, black and soft lateral bud appeared. Moreover, water boiling symptom in inner stem tissues was observed after ripping sugarcane stem. The relative electrical conductivity of the leaves increased, the contents of malonaldehyde (MAD) and proline (Pro), and the activities of catalase (CAT) increased, but the activity of superoxide dismutase (SOD) and peroxidase (POD) decreased in sugarcane stems under cold stress. Membership function method was used to assess the ability of cold tolerance, the results showed the order of cold tolerance was KQ01-1390>Co281>ROC22>28NG16>57NG155>96NG16, indicating that the original breeding were more sensitive to low temperature and showed weaker ability of cold tolerance than the hybrid varieties.

Key words: sugarcane, variety, low temperature stress, physiological character

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