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Title: SYMBIOTIC COMPETENCE OF RHIZOBIUM LEGUMINOSARUM ON DIVERSE GENOTYPES OF FABA BEAN.

Author
item Van Berkum, Peter
item DADSON, ROBERT - UNIV. OF MD EASTER SHORE
item HASHEM, FAWZY - UNIV. OF MD EASTER SHORE
item WAHAB, S.M. - ARC, EGYPT
item MAHMOUD, A - ARC, EGYPT

Submitted to: American Society of Agronomy
Publication Type: Abstract Only
Publication Acceptance Date: 9/15/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Twenty-seven genotypes of faba bean, Vicia faba L., were inoculated with two different R. leguminosarum biovar viceae legume inoculants, and grown in the greenhouse. At six weeks, plants were uprooted and their vigor, dry weight and N content were determined. Nodulation and symbiotic competence of the Rhizobium inoculants on faba bean genotypes were also studied. R. leguminosarum inoculants varied significantly in their symbiotic competence with the faba bean genotypes. However, when plants were exposed to elevated heat stress their symbiotic ability was significantly decreased. With most cultivars in a field trial, both inoculants significantly improved plant growth and increased seed yield over plants which received 36 kg N/ha. However, they failed to effectively nodulate V. faba cv. Giza 843. In this study, nodulation of faba beans by both inoculants was cultivar specific.