Nodule bacteria (Bradyrhizobium japonicum) of various activities were preincubated with homologous lectin and then used for inoculating soybean (Glycine max (L.) Merrill) seeds. The effect of this inoculation on the photosynthetic rate, lectin activity in leaves, and plant development at different supply of mineral nitrogen was investigated under the conditions of pot experiments. There was a positive relationship between the photosynthetic rate and the lectin activity of proteins isolated from soybean leaves. Under the conditions of effective symbiosis, activation of functioning of the symbiotic apparatus by preincubation of the rhizobia with lectin exerted an additional stimulating effect on the photosynthetic rate. It is suggested that a relationship between the effectiveness of legume-rhizobium symbiosis and the lectin activity in leaves is mediated by the regulation of photosynthesis through a demand for assimilates in the source-sink system of soybean plants.
Russian Journal of Plant Physiology – Springer Journals
Published: Mar 24, 2006
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