[Effect of the addition of specific lectin on the symbiosis of Rhizobium leguminosarum and Phaseolus vulgaris].
The effect of specific lectin addition on Rhizobium leguminosarum-Phaseolus vulgaris symbiosis characteristics was studied. Two alternatives were selected for comparison: a) P. vulgaris seedling roots treated with lectin were inoculated with R. leguminosarum and b) P. vulgaris seedling roots were inoculated with R. leguminosarum incubated with lectin for 3 h and 72 h. The following parameters were evaluated: number and dry weight of nodules and dry matter and nitrogen content of shoot. In lectin treatments, the weight of nodules (from 13% to 35%), dry matter (from 6% to 18%) and nitrogen content (from 5% to 28%) increased significantly. The results suggest a stimulation in the formation of functional-nodules, specially in root (a) and Rhizobium (b) 72 h treatments. That is consistent with a model in which the lectin functions as an extracellular matrix component of the root interacting with roots and Rhizobium s.p. receptors.
Mestrallet
M G
MG
Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Argentina. aabril@agro.uncor.edu
Defilpo
S S
SS
Abril
A
A
D007887:Fabaceae / Q000187:drug effects* / Q000382:microbiology / Q000502:physiology; D009584:Nitrogen / Q000032:analysis; D009586:Nitrogen Fixation / Q000187:drug effects*; D010835:Phytohemagglutinins / Q000494:pharmacology*; D037121:Plant Lectins; D018517:Plant Roots / Q000187:drug effects / Q000382:microbiology; D010946:Plants, Medicinal; D016961:Rhizobium leguminosarum / Q000187:drug effects* / Q000502:physiology; D013559:Symbiosis / Q000187:drug effects*
D010835:Phytohemagglutinins; D037121:Plant Lectins; C067494:erythroagglutinating phytohemagglutinin; D009584:Nitrogen
Efecto de la adición de lectina específica sobre la simbiosis Rhizobium leguminosarum--Phaseolus vulgaris.