Effect of previous cropping of rapeseed (Brassica napusL.) on soybean (Glycine max) root mycorrhization, nodulation, and plant growth

VALETTI, L.; IRIARTE,L.; FABRA, A.

EUROPEAN JOURNAL OF SOIL BIOLOGY

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

Lugar: Paris; Año: 2016 vol. 76 p. 103 - 106

1164-5563

Arbuscular mycorrhizal fungi (AMF) improve the uptake of immobile mineral nutrients such as phosphate, thereby enhancing the growth of most plants. However, plants belonging to the Brassicaceae family such as rapeseed (Brassica napus L.) do not associate with AMF. In Argentina, one of the crops frequently used in rotation with rapeseed is soybean (Glycine max L.). The aim of this study was to evaluate the impact of the non-mycorrhizal rapeseed (inoculated with the phosphorus solubilizing bacteria Bacillus sp. LRCP-4 or Arthrobacter sp LRCP-11) as the preceding crop, on soybean plants growth, nodulation and AMF colonization. Greenhouse experiments were done using soil samples from rapeseed cultivated fields to growth soybean plants. Results indicated that the soybean interaction with the microsymbiont Bradyrhizobium japonicum E109 was not affected and that the growth of plants in soil previously planted with rapeseed inoculated with Bacillus sp. LRCP-4 was increased. However, it was evident from this study that inclusion of rapeseed in the soybean-based system may decrease AMF soybean root colonization.