农业环境科学学报2016，Vol.35Issue(10)：1881-1887,7.DOI:10.11654/jaes.2016-0302
放线菌Act12对Pb胁迫下黑麦草根系生长及抗性生理的影响
Effects of actinomycetes Act12 on the root growth and resistant physiology of perennial ryegrass under Pb stress
摘要
Abstract
An inoculation pot experiment was conducted to investigate the effects of actinomycetes Act12 on the growth and resistant physi-ology of perennial ryegrass under Pb stress. Results showed that different levels of Pb stress affected the growth and physiological character-istics of ryegrass roots to various degrees. However, when inoculated with actinomycetes the root tiller number and root fresh weight were in-creased by 12.3%~44.2%and 19.2%~94.6%, respectively compared to control, indicating that actinomycetes could significantly promote root growth.Actinomycetes- inoculation increased root enzyme activities of catalase(CAT), superoxide dismulase(SOD)and peroxidase (POD)compared to control as well particularly in high level Pb stress(500~1000 mg·kg-1). Moreover, actinomycetes- inoculation de-creased root malondiadehyde(MDA)content and increased root activity significantly.The study indicates that inoculation with Act12 could increase root antioxidant enzyme activities, reduce peroxidation damage of plasma membrane, improve root activity and Pb tolerance, and thus significantly promote root growth of ryegrass under Pb stress.关键词
Pb胁迫/放线菌/黑麦草/根系生长/抗性生理Key words
Pb stress/actinomycetes/perennial ryegrass/root growth/resistant physiology分类
资源环境引用本文复制引用
曹书苗,王文科,王非,张军..放线菌Act12对Pb胁迫下黑麦草根系生长及抗性生理的影响[J].农业环境科学学报,2016,35(10):1881-1887,7.基金项目
国家自然科学基金重点项目（41230314）；长江学者与中国教育部创新团队项目（IRT0811）；教育部重点实验室和陕西省地下水与生态环境工程中心开放基金 （）
