Screening of Assessment Indexes on Heat Tolerance in Different Chinese Flowering Cabbage Cultivars(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Screening of Assessment Indexes on Heat Tolerance in Different Chinese Flowering Cabbage Cultivars

Author(s):: LI Guang-guang¹; ZHANG Cai-shun²; ZHENG Yan-song¹; 1.Guangzhou Institute of Agricultural Science,Guangzhou,Guangdong 510308；
2.College of Horticulture,South China Agricultural University,Guangzhou，Guangdong 510642

Keywords:: Chinese flowering cabbage; heat tolerance; heat injury index; comprehensive membership function method

Abstract:: The effects of high temperature stress on agronomic characters about plant height(PH)，width，base leaf No.(BLN),seed stalk leaf No.(SSLN)，leaf length(LL)，petiole length(PL)，leaf width(LW)，petiole width(PW)，leaf thickness(LT)，seed stalk height(SSH)，seed stalk diameter(SSD)，seed stalk weight(SSW)，total weight(TW)，survival rate(SR) and physiological biochemical character about malon dialdehyde(MDA) content，proline(Pro) content，electric conductivity(EC)，chlorophyll(Ch) content during Chinese flowering cabbages seedling stage and harvesting time in heat stress plastic shelter were investigated in 6 cultivars.The significantly related indicators were screened with the heat injury by the membership function method.The results showed that 4 indexes，were significant negative correlation with the heat injury index,could be used to identify the heat resistance of Chinese flowering cabbages.It included the HT-PH,HT-SSLN,HT-TW and HT-SR in heat stress plastic shelter during the cultivars harvesting time.The heat tolerance of the tested 6 cultivars could be divided into three types.The ‘Sijiu-19caixin’ and ‘Sijiuhuangcaixin’ were heat resistant type,‘Youlv50tiancaixin’ and ‘Youlv501caixin’ were general heat tolerance，‘Youlv701caixin’ and ‘Teqingchixin4’ were heat-sensitive.

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Last Update: 2014-08-29