Symbionts in Mucuna pruriens stimulate plant performance through nitrogen fixation and improved phosphorus acquisition

作     者：Anathi Magadlela Nokhetho Makhaye María Pérez-Fernández Anathi Magadlela;Nokhetho Makhaye;María Pérez-Fernández

作者机构：School of Life SciencesCollege of AgricultureEngineering and ScienceUniversity of KwaZulu-Natal(Westville Campus)Private Bag X54001Durban 4000South Africa Deparment of PhysicalChemical and Natural SystemsUniversidad Pablo de OlavideCarretera de Utrera Km 141013 SevilleSpain 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2021年第14卷第2期

页      面：310-322页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 

基　　金：by the National Research Foundation South Africa(NRF grant no.UID 113576) 

主　　题：Mucuna pruriens P deficiency biological N fixation N source preference C costs 

摘      要：Aims South Africa is mainly dominated by savanna and grasslands ecosystems which have been previously reported to be acidic and nutrient deficient,specifically with regard to phosphorus(P)and nitrogen(N).Mucuna pruriens(L.)DC,commonly known as velvet bean,is an indigenous legume in most African countries and has been reported to withstand these adverse soil *** legume is used in many countries of the world for their medicinal value as well as for soil fertilization *** there are reports on *** growth and establishment in nutrient stressed ecosystems,no investigation has been conducted on *** symbiotic interactions,N source preference and associated growth carbon costs when subjected to P *** this study,we determined the impact of microbial symbionts on N nutrition and growth carbon costs of *** under P *** Microbe inoculation soils were collected from four geographical distinct KwaZulu-Natal ***,seeds were germinated in these natural soils and in early stages of nodule development,then seedlings were transferred in sterile quartz sand and supplied with Long Ashton nutrient media with varying P *** Findings The 16S RNA sequence results revealed that *** was nodulated by Burkholderia sp.,Paenibacillus *** Bacillus irrespective of P *** though P deficiency resulted in decreased overall biomass/growth,the root biomass,nodule number and carbon costs *** addition,low P supplied saplings showed the highest arbuscular mycorrhiza fungi percentage root *** ***,nitrogen derived from atmosphere had a positive correlation with P level and the saplings had a dual reliance on atmospheric derived N and soil derived N with increased reliance on soil N in low P supplied ***,*** exhibited different morphological and microbial symbiosis when subjected to P deficiency.