不同强度干旱胁迫对蛋白桑种子萌发的影响  

Response of Seed Germination of Morus alba to Drought Stress

作　　者：段义忠[1] 公静茹 付浩轩 狄龙 DUAN Yi-zhong;GONG Jing-ru;FU Hao-xuan;DI Long(School of Life Sciences,Yulin University,Yulin 719000,China;Yulin Forestry Industry Development Center,Yulin 719099,China)

机构地区：[1]榆林学院生命科学学院,陕西榆林719000 [2]榆林市林业产业开发中心,陕西榆林719099

出　　处：《榆林学院学报》2023年第5期22-26,共5页Journal of Yulin University

基　　金：蛋白饲料桑在矿区采空沉陷区引种、驯化及应用示范(CXY-2021-85);榆林市林业产业开发中心横向课题(2022HX57)。

摘　　要：研究为探索不同强度干旱胁迫对蛋白桑种子的影响,了解干旱胁迫下蛋白桑种子的萌发机制,筛选了若干大小均匀、籽粒饱满的蛋白桑种子作为试验材料,使用聚乙二醇(PEG-6000)溶液模拟干旱胁迫的方法,分别配置0%、1%、5%、10%、15%和20%六个梯度的胁迫液,通过观察并记录试验数据,从而探索蛋白桑种子在不同梯度胁迫液培养下的发芽势、萌发率、发芽指数、胚根长、活力指数变化。结果表明15%的聚乙二醇(PEG-6000)模拟的干旱胁迫对蛋白桑种子的发芽势产生促进作用。20%的聚乙二醇(PEG-6000)模拟的干旱胁迫对蛋白桑种子的发芽势、萌发率、发芽指数、胚根长、活力指数均产生较强的抑制作用,为进一步探索蛋白桑的抗旱机制提供科学依据。本研究为榆林地区发展蛋白桑产业提供数据支持及理论依据。s:In this study,in order to explore the effects of different intensities of drought stress on protein mulberry seeds and understand the germination mechanism of protein mulberry seeds under drought stress,several protein mulberry seeds with uniform size and full grains are selected as experimental materials,and polyethylene glycol(PEG-6000)solution is used to simulate drought stress.Six gradients of 0%,1%,5%,10%,15%and 20%stress solutions are prepared respectively.The germination potential,germination rate,germination index,radicle length and vigor index of protein mulberry seeds under different gradient stress solutions are observed and recorded.The results show that drought stress simulated by 15%polyethylene glycol(PEG-6000)promotes the germination potential of protein mulberry seeds.Drought stress simulated by 20%polyethylene glycol(PEG-6000)has a strong inhibitory effect on the germination potential,germination rate,germination index,radicle length and vigor index of protein mulberry seeds,which provides a scientific basis for further exploring the drought resistance mechanism of protein mulberry.This study provides data support and theoretical basis for the development of protein mulberry industry in Yulin area.

关 键 词：蛋白桑 干旱胁迫 聚乙二醇 萌发 

分 类 号：S888[农业科学—特种经济动物饲养]