摘要
土壤盐渍化是世界性的生态环境问题之一。关于丛枝菌根真菌(AM真菌)对盐胁迫下白芨生长和养分吸收的影响研究相对较少。以白芨幼苗为研究对象,设置盐处理(0 mM和200 mM)和AM真菌处理(不接种AM真菌和接种摩西球囊霉)各两个水平共计4个处理组合,探讨盐胁迫下AM真菌对白芨幼苗生长和养分吸收的影响。结果表明,盐胁迫显著降低白芨根系侵染率、总干重和地上部分P含量分别约56.1%、48.9%和10%;在对照盐浓度下,接种AM真菌显著提高了白芨根系侵染率、总干重、地上部分N含量及地上部分P含量分别约14%、56.1%、10.8%和8.2%而在高盐浓度下,接种AM真菌则显著提高白芨根系侵染率、总干重、地上部分N含量及地下部分P含量分别约42.7%、30.7%、12.1%和11%,说明接种AM真菌可降低盐胁迫对白芨的生长和养分吸收的抑制作用。以上结果表明,接种AM真菌有助于提高白芨的耐盐能力,这对应用菌根技术提高白芨在盐化生境的种植和管理具有理论和实践指导意义。
Saline soil is one of the serious environmental problems around the world.However,few studies were explored about the effects of arbuscular mycorrhizal fungi on the growth and nutrient uptake of Bletilla striata under saline stress.Aiming to solve this problem,greenhouse experiment was conducted to study the effects of salt treatment(0 mM and 200 mM)and AM fungi treatment(inoculated with sterilized AM fungi and Glomus mosseae)on the growth and nutrient acquisition of Bletilla striata.The results showed that salinity significantly decreased root colonization,total dry weight and P concentration of shoot of B.striata seedlings by 56.1%,48.9%and 10%,respectively;under control saline conditions,inoculation with AM fungi significantly increased the root colonization,total dry weight,N concentration and P concentration of shoot of the plants by 14%,56.1%,10.8%and 8.2%,respectively.While under high salinity levels,AM fungi inoculation significantly increased the root colonization,total dry weight,N concentration of the shoot and P concentration of the root by 42.7%,30.7%,12.1%and 11%,respectively,indicating that inoculation with AM fungi could somehow reduce the detrimental effects of salt stress.In conclusion,AMF colonization has improved the saline tolerance of B.striata plants,and this study can provide theoretical and practical guidelines for the plantation and management of B.striata under saline environment.
作者
张欣磊
邱雅静
王艳红
宋垚彬
吴爱平
苏秀
ZHANG Xinlei;QIU Yajing;WANG Yanhong;SONG Yaobin;WU Aiping;SU Xiu(State Key Laboratory of Subtropical Silviculture,Zhejiang A&F University,Hangzhou 311300,China;Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration,Hangzhou Normal University,Hangzhou 310036,China;College of Bioscience&Biotechnology,Hunan Agricultural University,Changsha 410128,China)
出处
《生态科学》
CSCD
2020年第5期1-8,共8页
Ecological Science
基金
国家自然科学基金项目(31400366)
浙江农林大学学生科研训练项目(2013200033)
浙江省科技厅重点研发项目(2017C02028)
浙江省自然科学基金项目(LQ17C160003)。
关键词
白芨
盐胁迫
AM真菌
养分吸收
Bletilla striata
salt stress
arbuscular mycorrhizal fungi
nutrient acquisition
