保水剂和丛枝菌根真菌异形根孢囊霉对紫花苜蓿生长与抗旱性的影响  

Effects of arbuscular mycorrhizal fungi Rhizophagus irregularis and super absorbent polymers on growth and drought tolerance of Medicago sativa

作　　者：于萌[1,2] 张永帅 付伟 吴照祥[1,4] 谢伟 张莘[1] 郝志鹏 陈保冬[1,2] YU Meng;ZHANG Yong-Shuai;FU Wei;WU Zhao-Xiang;XIE Wei;ZHANG Xin;HAO Zhi-Peng;CHEN Bao-Dong(State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Food Science,Henan Institute of Science and Technology,Xinxiang,Henan 453003,China;Institute of Biological Resources,Jiangxi Academy of Sciences,Nanchang,Jiangxi 330096,China)

机构地区：[1]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [2]中国科学院大学,北京100049 [3]河南科技学院食品学院,河南新乡453003 [4]江西省科学院生物资源研究所,江西南昌330096

出　　处：《菌物学报》2019年第11期1976-1991,共16页Mycosystema

基　　金：国家自然科学基金(41571250);国家重点研发计划(2016YFC0500702)~~

摘　　要：为探讨保水剂(super absorbent polymers,SAP)和丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)对植物生长和抗旱性的影响,以紫花苜蓿Medicago sativa为供试植物,开展了温室盆栽试验。植物播种时设置土壤添加和不添加聚丙烯酰胺型SAP(BJ2101)处理,以及接种和不接种异形根孢囊霉Rhizophagus irregularis处理,通过称重法维持12%的土壤含水量(正常供水),植物生长30d,各处理一半植物接受干旱胁迫(6%的土壤含水量),另一半仍正常供水,持续30d后收获。结果表明,在干旱胁迫下,接种AMF显著增加了紫花苜蓿的植株干重,促进了植物对矿质元素的吸收,提高了叶片中叶绿素和脯氨酸含量,增强了植物的抗旱性。SAP抑制了R.irregularis对植物根系的侵染;与单接种AMF相比,SAP和AMF的联合施用降低了紫花苜蓿的生物量,影响了植物对矿质元素的吸收。本研究中,SAP和AMF的联合施用并没有表现出协同增效作用,这一方面可能是因为研究设定的土壤水分管理模式,另一方面SAP与AMF共同施用的适宜条件还需进一步探索优化。To investigate the interactive effects of arbuscular mycorrhizal fungi(AMF)and super absorbent polymers(SAP)on Medicago sativa plant growth and drought resistance,a pot experiment was conducted under greenhouse conditions.Treatment with or without Rhizophagus irregularis and addition or without addition of polyacrylamide type SAP(BJ2101)to the soil were designed under well-watered(12%water content)or drought conditions(6%water content).Results showed that the inoculation with AMF significantly increased plant dry weight under drought stress,facilitated the uptake of mineral elements,and increased the leaf chlorophyll and proline concentration.However,SAP inhibited the root colonization of R.irregularis.Compared with single inoculation of AMF,SAP combined with AMF reduced plant biomass and negatively affected the absorption of mineral elements by plants under drought stress.The combined application of SAP and AMF did not show synergistic effects,and this might be due to the defective soil moisture management.The co-application of SAP and AMF required further optimization.

关 键 词：丛枝菌根真菌 保水剂 紫花苜蓿 植物生长 抗旱性 

分 类 号：S54[农业科学—作物学]