Selection of rhizobial strains differing in their nodulation kinetics under low temperature in four temperate legume species
作者机构：Agriculture and Agri-Food CanadaQuebec Research and Development CentreQuebec CityQuebecCanada Département de phytologieFacultédes Sciences de l'Agriculture et de l'AlimentationUniversitéLavalQuébec CityQuebecCanada Centre de recherche sur les grains(CÉROM)Saint-Mathieu-de-BeloeilQuebecCanada
出 版 物：《Grassland Research》 (草地研究（英文）)
年 卷 期：2023年第2卷第3期
页 面：197-211页
学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学]
主 题：cold-tolerant rhizobia Lotus corniculatus low temperature Onobrychis viciifolia rhizobium symbiosis Trifolium hybridum Trifolium pratense
摘 要：Background:Winter climate change including frequent freeze-thaw episodes and shallow snow cover will have major impacts on the spring regrowth of perennial ***-bloating perennial forage legume species including sainfoin,birdsfoot trefoil,red clover,and alsike clover have been bred for their adaptation to harsh winter *** parallel,the selection of cold-tolerant rhizobial strains could allow earlier symbiotic nitrogen(N)fixation to hasten spring regrowth of ***:To identify strains forming nodules rapidly and showing high N-fixing potential,60 rhizobial strains in association with four temperate legume species were evaluated over 11 weeks under spring soil temperatures for kinetics of nodule formation,nitrogenase activity,and host ***:Strains differed in their capacity to form efficient nodules on legume hosts over *** showing higher nitrogenase activity were arctic strain N10 with sainfoin and strain L2 with birdsfoot *** clovers,nitrogenase activity was similar for control and inoculated plants,likely due to formation of effective nodules in controls by endophyte rhizobia present in ***:Selection based on nodulation kinetics at low temperature,nitrogenase activity,and yield was effective to identify performant rhizobial strains for legume *** use of cold-tolerant strains could help mitigate winter climatic changes.
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