Breeding for improved nitrogen fixation : Improving soybean x Bradyrhizobium symbiosis for cool growing regions

Affiliation
Research Institute of Organic Agriculture (FiBL), Switzerland
Messmer, Monika M.;
Affiliation
Research Institute of Organic Agriculture (FiBL), Switzerland
Hertenstein, Florian;
Affiliation
Research Institute of Organic Agriculture (FiBL), Switzerland
Berset, Estelle;
GND
1059140918
Affiliation
Julius Kühn-Institute (JKI), Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Groß Lüsewitz, Germany
Balko, Christiane;
Affiliation
Naturland e. V., Germany
Vogt-Kaute, Werner;
Affiliation
FiBL Deutschland e. V., Germany
Wilbois, Klaus-Peter

Protein yield of soybean depends heavily on successful symbiosis with Bradyrhizobium bacteria able to fix atmospheric nitrogen. Low temperature limits the growth of soybeans but also the efficiency of biological nitrogen fixation (BNF). Cold tolerant Bradyrhizobium strains could be identified, and significant differences in BNF were found for Bradyrhizobium and for soybean genotypes allowing selection for improved BNF. Significant soybean x Bradyrhizobium interactions were found in mesocosm and field trials, as well as complex temperature dependent interactions with mycorrhiza strains. More studies are needed to elucidate the important plant – rhizosphere interactions.

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