Rhizobitoxine Production by Bradyrhizobium elkanii Enhances Nodulation and Competitiveness on Macroptilium atropurpureum

Author:

Yuhashi Ken-Ichi12,Ichikawa Norikazu1,Ezura Hiroshi2,Akao Shoichiro3,Minakawa Yasuo4,Nukui Noriyuki1,Yasuta Tsuyoshi1,Minamisawa Kiwamu14

Affiliation:

1. Institute of Genetic Ecology, Tohoku University, Katahira, Aoba-ku, Sendai, 980-8577,1

2. Plant Biotechnology Institute, Ibaraki Agricultural Center, Ago, Iwama, Nishi-Ibaraki, 319-0292,2

3. Department of Plant Physiology, National Institute of Agrobiological Resources, Tsukuba, Ibaraki, 305-8602;3 and

4. School of Agriculture, Ibaraki University, Ami, Ibaraki, 300-0393,4 Japan

Abstract

ABSTRACT Application of 1-aminoocyclopropane-1-carboxylic acid, an ethylene precursor, decreased nodulation of Macroptilium atropurpureum by Bradyrhizobium elkanii. B. elkanii produces rhizobitoxine, an ethylene synthesis inhibitor. Elimination of rhizobitoxine production in B. elkanii increased ethylene evolution and decreased nodulation and competitiveness on M. atropurpureum . These results suggest that rhizobitoxine enhances nodulation and competitiveness of B. elkanii on M. atropurpureum .

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

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