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Micro-morphology of common bean Phaseolus vulgaris L nodules undergoing senescence


, : Micro-morphology of common bean Phaseolus vulgaris L nodules undergoing senescence. Acta Physiologiae Plantarum 30(4): 545-552

We studied morphological changes over time by nodules formed on the root system of the common bean (Phaseolus vulgaris L.). Two cultivars, Bayomex and Cacahuate 72 with growth habit Type I and the Rhizobium etli strain CE-3 were used. The results showed the collapse of the infected zone, degradation of the cell walls and membranes, changes in the number and distribution of the starch granules, appearance of protein granules, and disintegration of the central tissue of the nodule with ageing. Additionally, we describe the influence of time on the progress of the nodular senescence.

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DOI: 10.1007/s11738-008-0153-7


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