Effect of arbuscular mycorrhizas on P use efficiency for growth and N2 fixation in common bean (Phaseolus vulgaris L.)

Scientific Research and Essays

Fatma Tajini¹ 

关键词:  ;    Acaulospora mellea;    Arbuscular mycorrhizal fungi;     ;    Glomus intraradices;     ;    Gigaspora rosea;    nitrogen fixation;     ;    Phaseolus vulgaris;    phosphorus;    rhizobia;     ;    Stylosanthes guianensis;     ;    symbiosis.;   

DOI  :  10.5897/SRE12.093

学科分类：社会科学、人文和艺术（综合）

来源: Academic Journals

【 摘 要 】

This study assessed the tripartite symbiosis of common bean(Phaseolus vulgarisL.)with rhizobia andarbuscular mycorrhizal fungi (AMF) in hydroaeroponic culture under sufficientversusdeficient P supplies(250versus75 µmol P plant-1week-1). The effects of three AMF species on the mycorrhizal root colonization, rhizobial nodulation, plant growth and phosphorus useefficiency were compared in thebean recombinant inbred line (RIL) 147 after transfer from initial sand culture. AlthoughGlomus intraradiceswell colonized roots of RIL147, in both P levels,Gigaspora roseaweakly colonized roots,and no root-colonization was found withAcaulospora mellea.Mycorrhization byGlomuswas also obtained by contact with mycorrhizedStylosanthes guianensis.Significant differences among colonization and nodulation of the roots and plant growth were found between AMF species. Although the results showed that the double inoculation induced a significant increase in all parameters whatever the phosphorussupply in comparison to control.Nevertheless, the highest phosphorus use efficiency and plant total nitrogen were found under P deficiency in both AMF treatments (by contact or by inoculant). It is concluded that phosphorus use efficiency for plant growth and nitrogen fixation could be improved by compatibilitybetween both symbionts(AMF and rhizobia) and common bean genotype.

【 授权许可】

CC BY