Influence of inoculation with arbuscular mycorrhizal fungi on stable isotopes of nitrogen in Phaseolus vulgaris

被引:22
|
作者
Redecker, D
vonBerswordtWallrabe, P
Beck, DP
Werner, D
机构
[1] UNIV MARBURG, FACHBEREICH BIOL, D-35032 MARBURG, GERMANY
[2] CTR INTERNACL AGR TROP, CALI AA6713, COLOMBIA
关键词
arbuscular mycorrhiza; legume-rhizobia; symbiosis; N-15 natural abundance; Phaseolus vulgaris; Rhizobium spp; Glomus spp; inoculation;
D O I
10.1007/s003740050255
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
The interactions between Phaseolus vulgaris, Rhizobium spp. strains nodulating P. vulgaris, and arbuscular mycorrhizal (AM) fungi were assessed under greenhouse conditions in a nonsterilized Typic Haplustalf soil from Cauca, Colombia. Our results indicate a specific involvement of AM fungal species in nitrogen acquisition by the legume plants from symbiotic nitrogen fixation and from soil. A significant specific influence of inoculation with Glomus spp. on the N-15/N-14 ratio in plant shoots was dependent on the inoculated rhizobial strain, but AM fungal inoculation had no significant effect on shoot dry weight or nodule occupancy in the two different rhizobial strain treatments. The results imply that in low P soils the effects of an improved mycorrhizal symbiosis may include improved symbiotic N-2 fixation efficiency and/or improved soil N uptake.
引用
收藏
页码:344 / 346
页数:3
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