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One of the methodsto determine the tolerance of plants to water stress is the observation of germinationof seeds under stress induced in laboratory conditions. Thus, the aim was toevaluate the response of four common bean cultivars to water deficit simulatedunder laboratory conditions. Two common landrace genotypes acquired fromfarmers FORT 07 and FORT 08 and two commercial cultivars, IAPAR 81 andSerrano were evaluated. The different levels of water deficit were induced withmannitol solution. The experimental design was completely randomized and a factorialscheme 5 × 4 osmoticpotential x genotypes, with four replications. The characteristics: primaryroot protrusion, seed vigor, normal and abnormal seedling, seedling and rootlength, fresh and dry weight of seedling and root were evaluated. By reducingthe osmotic potential seedling vigor bean was more affected than the primaryroot protrusion. Regardless of cultivar, there was a significant andprogressive reduction in the normal seedlings percentage from potential -0.3 MPa. The IAPAR81 and FORT 07 cultivars showed higher tolerance to water deficit compared toother cultivars.


Phaseolus vulgaris L., Mannitol, Water Stress

Cite this paper

Cabral, P. , Santos, L. , Vieira, H. , Soares, T. , Bremenkamp, C. and Rodrigues, W. 2014 Effect of Osmotic Stress on the Initial Development of Bean Seedlings. American Journal of Plant Sciences, 5, 1973-1982. doi: 10.4236-ajps.2014.513211.

Autor: Pablo Diego Silva Cabral, Leonardo N. S. dos Santos, Henrique Duarte Vieira, Tais Cristina Bastos Soares, Cintia Aparecida Bremen

Fuente: http://www.scirp.org/


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