水杨酸对温度胁迫下紫御谷幼苗根系活力及根系形态指标的影响研究  

Influence of Salicylic Acid on the Roots Activity and Root Morphology Indicators of Pennisetum glaucum ‘Purple Majesty' Under Temperature Stress

作　　者：江林玲 马永甫[1] 杨丙贤[2] 宗学凤[2] 

机构地区：[1]重庆文理学院林学与生命科学学院(星湖校区),重庆402160 [2]西南大学农学与生物科技学院,重庆400715

出　　处：《中国农学通报》2014年第1期174-177,共4页Chinese Agricultural Science Bulletin

基　　金：重庆文理学院2012年学生科研立项"紫御谷草的生理及环境适应性研究"(XZ20120009)

摘　　要：为了给紫御谷在重庆的育苗、种植和应用提供参考,并为其他草坪草植被资源的筛选和研究以及为进一步丰富重庆地区园林地被资源做出贡献,以紫御谷幼苗为材料,设置高温胁迫和低温胁迫,研究水杨酸对温度胁迫下紫御谷幼苗根系活力及根系形态指标的影响。结果表明:(1)高温和低温胁迫影响根系活力,使根系活力迅速下降,水杨酸处理能显著提高高温胁迫第3天和第5天以及低温胁迫第5天和第7天紫御谷幼苗的根系活力。(2)温度胁迫处理抑制了紫御谷幼苗根系的生长,使紫御谷幼苗的根总长、根表面积和根体积降低,低温胁迫对根总长造成的影响要大于高温胁迫。水杨酸处理能显著提高高温胁迫下植株的根表面积。To provide reference for the seedlings,planting and application of Pennisetum glaucum‘Purple Majesty＇in Chongqing,for screening and research of other turf grass vegetation,and contribute to enrich the Chongqing garden ground resources,Pennisetum glaucum‘Purple Majesty＇was used as the material,and the author set high temperature stress and low temperature stress to study roots activity and root morphology indicators of purple pearl millet seedlings under temperature stress.The results indicated that：（1） high and low temperature stress made root activity decrease rapidly,salicylic acid treatment significantly improved the seedlings root activity at 3rd and 5th day under high temperature stress,5th and 7th day at the stress of low temperature.（2） High and low temperature stress inhibited the root system growth of Pennisetum glaucum ‘Purple Majesty＇seedlings roots,the total root length,root surface area and root volume reduced,the impacts of low temperature stress on the total root length were greater than high temperature stress.Salicylic acid treatment significantly increased the surface area of the root under high temperature stress.

关 键 词：水杨酸 高温 低温 根系活力 根系形态指标 

分 类 号：S6[农业科学—园艺学]