【摘要】 利用PEG高渗溶液法研究不同抗旱性柱花草品种的萌发特性。结果表明:除质量浓度为100g/L的PEG对热研2号和热研10号的种子萌发有轻微的促进作用外,其余质量浓度PEG对种子的萌发、胚芽和胚根的生长都有抑制作用。胚根抑制率和根芽比的变化幅度基本反映了柱花草的抗旱性,可作为抗旱性评价的参考指标;质量浓度为250g/L的PEG处理下的相对根芽比差异非常显著,可作为柱花草抗旱性评价的可靠指标。更多还原

【Abstract】 Germination Characteristics of Stylosanthes spp.with Different Drought Resistance in Hyperosmotic Solution$$$$ZHANG Xuyuan1,2) LIU Guodao2) HUAN Shuanqian1,2) MO Hanyan1) LUO Youli1)(1 College of Agronomy, SCUTA, Danzhou, Hainan 571737;2 Tropical Crop Genetic Resources Institute, CATAS, Danzhou, Hainan 571737)Abstract Germination characteristics of Stylosanthes spp. with different drought resistantce was studiedusing PEG hyperosmotic solution. The results suggested that PEG restrained seed germination, growthof embryo and radicle but 10% mass concentration PEG promoted seed germination of Stylosanthesguianensis cv. Reyan No.2 and S. guianensis cv. Reyan No.10. The retarding rate of radicle and range ofvariation of root/shoot can be used as reference index of drought resistance of Stylosanthes because theyreflected roughly drought resistance of Stylosanthes. The relative root/shoot ratio in 25% PEG can beused as a reliable index of drought resistance of Stylosanthes because difference of it was significant.keywords Stylosanthes Sw. ; PEG ; germination characteristic ; drought resistance更多还原