为研究不同紫苏品种种子在萌发期对干旱胁迫的响应，给评价紫苏种子的抗旱性和栽培管理提供理论依据，以紫苏品种TS003号和贵苏4号为试料，采用不同浓度的PEG-6000溶液模拟干旱胁迫，分别测定2个品种的种子发芽率、发芽势、发芽指数、活力指数、胚根长和鲜重等指标。结果表明，不同浓度的PEG-6000干旱胁迫处理对TS003号、贵苏4号的发芽率、发芽势、发芽指数、活力指数、胚根长和鲜重均产生抑制作用，均随着PEG-6000浓度的增加呈下降趋势。与蒸馏水空白对照相比，在低浓度PEG-6000(3%、6%)干旱胁迫下，各指标值下降幅度差异不显著(P ＞ 0.05)，PEG-6000浓度在12%及以上时显著下降(P < 0.05)，尤其在PEG-6000浓度为24%(重度干旱胁迫)处理下紫苏种子发芽完全受到抑制。

In order to study the response and drought resistance of seeds of different perilla varieties to drought stress during the germination period, TS003 and Guisu 4 were used as experimental materials. PEG-6000 solution with different concentrations was used to simulate drought stress, and the germination rate, germination potential, germination index, vigor index, embryo root length and fresh weight were measured, respectively. The results showed that different concentrations of PEG-6000 solutions had inhibitory effects on the germination rate, germination potential, germination index, vigor index, radicle length and fresh weight of the two perilla varieties. With the increase of PEG-6000 concentration, it showed a downward trend. Compared with the control i.e., distilled water, the decrease of indexes under low concentration of PEG-6000 solutions(3% and 6%) was not significant(P ＞ 0.05), while the decrease of indexes was significantly(P < 0.05) when the concentration of PEG-6000 solutions was at or above 12%, especially when the concentration of PEG-6000 solution was at 24%(severe drought stress), the germination of perilla seeds was completely inhibited.

S565.8

陇东学院青年科技创新项目(XYZK202002)。