Preliminary Study on Low Temperature Tolerance in Watermelon Seedling

doi:10.3321/j.issn:1000-7091.1997.02.018

Abstract

Abstract: In Beijing watermelon seedlings are often affected by low temperature in early spring.It is imperative to study the effects of low temperature on watermelon seedlings.Cold tests at the 3 leaf seedling stage were conducted in growth chambers maintained at 0℃,10℃,or 15℃ temperature with 100μmol·m^-2 ·s^-1 or 200μmol·m^-2 ·s^-1 light intensity.The results showed that there were significant difference on cold tolerance among the different watermelon cultivars.The wild watermelon germplasms PI482322,PI482261,PI282299,PI482308,PI494528,PI494532 appeared to be cold resistant.The cultivated cultivars were commonly cold sensitive.The leaves of the cold sensitive cultivars growing at low temperature displayed mosaic like variegation,shrinking,yellowing or wilting.The chilling symptoms were significantly activated by the higher light intensity.The optimum selecting condition for cold tolerance on watermelon seedlings was 10℃ temperature and 100 μmol·m^-2 ·s^-1 light intensity or 15℃ temperature and 200 μmol·m^-2 ·s^-1 light intensity.

Key words: Watermelon seedling, Low temperature, Determination

CLC Number:

S561.04

Xu Yong, Wang Yongjian, Zhang Feng, Zhang Lirong. Preliminary Study on Low Temperature Tolerance in Watermelon Seedling[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1997, 12(2): 93-96. doi: 10.3321/j.issn:1000-7091.1997.02.018.

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