Effects of PEG Simulated Drought Stress on Seed Germination of Different Cucumber Varieties
XU Yao-zhao1,2, ZENG Xiu-cun3*, WANG Qin-li1,2, LU Jing-lin1,2, WANG Zhi-jiang1，2, ZHANG
Ke-duo1
1Department of Agronomy, Hexi College, Zhangye 734000, Gansu, China; 2Institute of Hexi Oasis Agriculture, Zhangye 734000, Gansu, China; 3Department of Life Science and Engineering, Hexi College, Zhangye 734000, Gansu, China
Abstract：Taking the seeds of cucumber（Cucumis sativus L.）varieties‘Zhongnong No.16’,
‘Jinyuan No.6’and‘Shuchunbaoyou No.26’as experimental materials, by using different
concentration PEG6000 to simulate drought stress conditions, we studied the effects of
drought stress on seed germination rate, germination index, vigor index, radicle length,
hypocotyl length, lateral root number, electrolyte leakage rate, the dry weight of
radicle. The results showed that the low osmotic potential treatment had significant
promotion effect on germination rate, germination index, vigor index, radicle length,
hypocotyl length, lateral root number and the dry weight of radicle. While the high
osmotic potential treatment had obvious inhibition role on the germination rate,
germination index, vigor index, radicle length, hypocotyl length, lateral root number and
the dry weight of radicle, However, the electrolyte leakage rate is reduced with the
increase of osmotic potential treatment. The drought resistance sequence of different
cucumber species is‘Zhongnong No.16’>‘Jinyuan No.6’>‘Shuchunbaoyou No.26’.
