Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (2): 267-274.DOI: 10.3969/j.issn.1000-2561.2020.02.009

• Phytophysiology and Biochemistry • Previous Articles     Next Articles

Effects of Exogenous Ca 2+ on Leaf Physiological Indexes in Black Pepper Under Low Temperature Stress

WU Baoduo1,2,TANG Hu3,HU Lisong1,2,FAN Rui1,2,YANG Jianfeng1,4,ZHOU Yanfei3,HAO Chaoyun1,2,4,*()   

  1. 1. Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning, Hainan 571533, China
    2. Key Laboratory of Genetic Resources Utilization of Spice and Beverage Crops, Ministry of Agriculture and Rural Affairs, Wanning, Hainan 571533, China
    3. School of Tropical Crops, Yunnan Agricultural University, Pu’er, Yunnan 665000, China
    4. Hainan Provincial Key Laboratory of Genetic Improvement and Quality Regulation for Tropical Spice and Beverage Crops, Wanning, Hainan 571533, China
  • Received:2019-04-18 Revised:2019-08-29 Online:2020-02-25 Published:2020-03-21
  • Contact: HAO Chaoyun


Piper nigrum cv. Reyin1 is widely planted in China and is sensitive to cold stress. Five different concentrations of calcium chloride treatments including 0, 7, 14, 21, 28 mmol/L were set to spray black pepper. All the materials were treated with low temperature (10 ℃/5 ℃, 12 h/12 h) for four days and recovery training (28 ℃/20 ℃, 12 h/12 h) for six days. The phenotype and physiological indexes were analyzed. Calcium chloride treatment of 7 mmol/L could improve the cold damage phenotype and net photosynthetic rate of black pepper. With Ca 2+ concentration increasing, the cold damage phenotype gradually aggravated and net photosynthetic rate became lower. Compared with CK, the 7 mmol/L Ca 2+ treatment could significantly improve the activity of antioxidant enzymes, increase the soluble sugar content and reduce the malondialdehyde content. With the Ca 2+ treatment concentration increasing, the activity of antioxidant enzymes and the soluble sugar content became lower, and the malondialdehyde content became higher. The results would provide a reference for cold resistance technical guidance and cold resistance molecular breeding in black pepper production.

Key words: Piper nigrum cv. Reyin1, calcium chloride, cold stress

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