PEG-6000模拟干旱胁迫对酸浆种子萌发及幼苗生长的影响  

Influence of PEG-6000 Simulated Drought Stress on Seed Germination and Seeding Growth of Physali alkekengi

作　　者：于爽[1] 郝婧玮[1] 李帅[1] 张雨晴 高剑[1] 才忠喜[1] YU Shuang;HAO Jing-wei;LI Shuai;ZHANG Yu-qing;GAO Jian;CAI Zhong-xi(College of Life Science and Technology,Mudanjiang Normal College,Mudanjiang 157011,Heilongjiang,China)

机构地区：[1]牡丹江师范学院生命科学与技术学院,黑龙江牡丹江157011

出　　处：《湖北农业科学》2018年第12期81-84,共4页Hubei Agricultural Sciences

基　　金：牡丹江师范学院科研项目(YB201606);黑龙江省教育厅科研项目(12541838);牡丹江市科技局项目(Z20170094)

摘　　要：为探明酸浆(Physalis alkekengi L.)种子对不同干旱处理的响应,为耐旱酸浆资源的开发利用提供科学依据,以酸浆的2个品种粒粒甜和铁把种子为材料,采用PEG-6000(质量分数分别为0、5%、10%、15%、20%、30%)模拟干旱胁迫的方法 ,比较了在干旱条件下酸浆2个品种种子的萌发和幼苗生长情况。结果表明,在5%的PEG-6000处理下,铁把种子的发芽势、发芽指数、芽长和对照相比有所上升,当处理质量分数超过10%时,以上指标以及根长均随着PEG-6000质量分数的升高而急剧下降,当PEG-6000质量分数达到30%时,酸浆种子萌发受到显著的抑制。2个品种的种子活力指数差异较大,其中粒粒甜种子活力指数先上升后下降,铁把的种子活力指数持续下降。说明在干旱胁迫下,粒粒甜种子的萌发能力强于铁把。In order to explore the physiological response mechanism of Physalis alkekengi L. to different drought treatments,and provide scientific references for exploration and utilization of drought tolerant varieties, the seedlings of two P. alkekengi varieties, P. alkekengi cv. Lilitian and P. alkekengi cv. Tieba, were used as materials. Under the PEG-6000（mass fraction0, 5%, 10%, 15%, 20%, 30%） simulated drought stress, seed germination and seeding growth characteristics were measured.The research indicates that, at the concentration of 5% PEG-6000, the germination energy, germination index, bud length of the P. alkekengi cv. Tieba seed pulp were significantly increased compared with the control. When the treatment concentration was higher than 10%, the above indexes as well as root length decreased sharply with the increase of PEG-6000 concentration. When the concentration of PEG-6000 reached to 30%, the indexes of P. alkekengi seed were all at a very low level.The seed vigor index of the two varieties was different as the seed vigor of P. alkekengi cv. Lilitian increased first and then decreased; while the activity of P. alkekengi cv. Tieba seed decreased continuously. Under drought stress, the seed germination capacity of P. alkekengi cv. Lilitian is stronger than that of P. alkekengi cv. Tieba.

关 键 词：酸浆(Physalis alkekengi L.) PEG-6000 种子萌发 幼苗生长 

分 类 号：S641.478[农业科学—蔬菜学]