Response of seedling growth to hot-humid stress in different eco-type cu-cumber cultivars
TONG Peijiang
MENG Huanwen
PAN Yupeng
LIU Hanqiang
CHENG Zhihui
Abstract：To clarify the response of cucumber seedling growth to hot-humid stress,71 cultivars of 3 eco-types were test-ed under 42 ℃/32 ℃+RH 95％hot-humid treatment to measure growth parametrers.The results showed that under hot-humid stress,the growth of plant height in 68 cultivars was enhanced,stem width in 67 cultivars inhibited,leaf area and seedling dry weight in all cultivars were inhibited inordinately.The variable coefficients of the relative values of those indexes were 10.9％,7.9％,12.5％and 9.5％,respectively,compared to the control condition(28 ℃/18 ℃+RH 75％).The differences in plant height,leaf area and seedling dry weight among cultivars and eco-types under hot-humid stress were all significant.The mean value and variable coefficient of hot-humid damage index among 71 cultivars were 0.354 and 49.6％;they were 0.376 and 49.1％,0.409 and 43.3％,0.260 and 56.8％,respectively among North China type,South China type and European greenhouse type.Both the differences among cultivars and eco-types were significant.There-fore,the response of cucumber seedling growth to hot-humid stress is mainly determined by cultivar characteristic,and al-so related to their eco-types.
Keywords：CucumberHot-humid stressCultivar resourcesEco-typeSeedling stage
Publication Date：2023-12-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 47-53 )