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Salt Tolerance Evalution of Pumpkin Hybrid Cultivars during Seed Germination Stage

SUN Yong-dong,HAO Feng-ge,XU Bin(College of Horticulture and Landscape,Henan Institute of Science and Technology,Xinxiang 453003,China)  
Twenty-two pumkin hybrid cultivars were treated with 120 mmol/L Ca(NO3)2 concentration,and measured five indexes related to salt tolerance such as saltstress index root length,later root number,relative water content and relative conductivity to study their tolerance to salt during seed germination.Salt tolerance was evaluated using subordinate function and cluster analysis.The results showed that subordinate function values could analysis the salt tolerance of pumkin completely and avoid the shortage of single index.Of 22 pumkin hybrid cultivars,Hui 4×229-1 was salt tolerance cultivar,whereas 045-3×Yunnan 4,072-2×Hui 4,041-1×229-1,635-1×229-1,058-1×229-1 and 041-1×450 were moderately salt tolerance cultivars,but 007-2×Chang 2,042-1×229-1 and 072-2×229-1 were salt sensitive cultivars.
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