%0 Journal Article %A ZHU Shiyang %A ZHANG Xiaoling %A LIU Qing %A LUO Tiankuan %A TANG Zheng %A ZHONG Weijie %A ZHU Zhujun %T Germination Characteristics and Drought Resistance of Cauliflower Germplasms Under PEG Simulated Drought Stress %D 2019 %R 10.11869/j.issn.100-8551.2019.09.1833 %J Journal of Nuclear Agricultural Sciences %P 1833-1840 %V 33 %N 9 %X Twelve cauliflower materials were used to evaluate their drought tolerance by examining their relative germination percentage (RGP), relative germination rate (RGR), relative germination index (RGI), relative vigor index (RVI), relative seedling height (RSH) and relative root length (RRL) under different PEG concentrations including 0(CK), 100, 150 and 200 g·L-1 by method of subordinate function. The results showed that, 100 g·L-1PEG stress presented lower effect on seed germinating, while 150~200 g·L-1PEG stress significantly inhibited seed germinating. The 100~150 g·L-1PEG stress had a promoting effect on RRL, while 150~200 g·L-1PEG stress presented significant inhibition on RSH. Therefore, 150~200 g·L-1 PEG was most suitable for screening drought resistance of cauliflower at germination stage. According to comprehensive evaluation of subordinate function method based on RGP, RGR, RGI, RVI, RSH and RRL, the drought resistance of the 12 cauliflower materials followed the order of P3>P6>A1>P8>P7>P2>P1>P4>P5>A2>A3>P9. These results provide theoretical evidence for breeding of drought resistance in cauliflower. %U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2019.09.1833