Study on physiological characteristics of three different cold-resistant tomato strains | 3种不同耐寒番茄品系的生理特性研究
2010
Sun Jiajia, Hefei University of Technology, Hefei (China), School of Biotechnology and Food Engineering | Zhang Qi’an, Anhui Academy of Agricultural Sciences, Hefei (China), Horticulture Research Institute | Jiang Li, Hefei University of Technology, Hefei (China), School of Biotechnology and Food Engineering
[Objective] The aim was to study cold-resistant indexes and physiological characters of three different cold-resisitant tomato strains selected under natural conditions. [Method] With 3-4 weeks tomato seedlings as tested materials, through simulating external environment conditions by the cold treatment in lab, the survival ratio and growth status of seedlings were identified; by studying the morphological change in vitro leaves after cold treatment and determining the relative conductivity, the cold-resistant degree of different tomato strains was identified and the correlation between conductivity and survival rate was analyzed; the variation of soluble sugar and praline content in plant of tomato was determined under the condition of cold stress. [Result] The results showed that leaf morphological changes, size of conductivity and growth status of different tomato strains after cold treatment have significant differences; the variation of soluble sugar contents in plant has significant differences, while the variation of praline content has no significant differences. [Conclusion] There is a certain correlation between conductivity and survival rate under cold treatment conditions, and plant cold tolerance is related to accumulation of soluble sugar content.
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