Identification and selection of the salt tolerance of melon varieties at ger-mination stage
In order to understand the salt tolerance of different melon varieties and clarify the evaluation indicators of salt tolerance during germination,8 melon varieties were subjected to 5 days of salt stress treatment during germination using NaCl solutions with 6 concentration gradients of 0,50,100,150,200,and 250 mmol·L-1,and 200 mmol·L-1 was selected as the appropriate concentration for salt stress.213 varieties were subjected to 5 days germination stress treatment with 0 and 200 mmol·L-1 NaCl solutions and 6 indicators,including germination potential,germination rate,germination index,root length,fresh mass,and vitality index,were investigated for each melon variety.Correlation analysis,principal compo-nent analysis,membership function analysis,and systematic clustering were used to evaluate their salt tolerance.The re-search results indicate that the principal component analysis method integrates 6 salt tolerance indicators into 1 principal component,which can represent 79.23％of the original data information of salt tolerance.Germination rate,germination potential,germination index,and root length are important indicators for identifying salt tolerant varieties during the ger-mination period.207 materials can be divided into 4 levels successfully,namely 39 salt tolerant,73 relatively salt tolerant,40 salt sensitive,and 55 salt extremely sensitive varieties.This study provides material and methodological support for the identification,cultivation,and gene mining of salt tolerant melon varieties.
万方数据
维普
