Dynamics of the Foliar Pigments Content in Some Bean Genotypes, from North-East Romania, under Salt Stress

Beatrice Alexandra MODIGA, Carmenica Doina JITĂREANU, Cristina SLABU, Alina Elena MARTA, Mihaela COVAȘĂ

Abstract


Phaseolus vulgaris L. is a salt-sensitive species. For this reason, the purpose of the face work was to determine the effect of excess NaCl on the content of the chlorophyll pigments as an indicator of salt stress tolerance. Therefore, in the present study, of the influence of saline solutions of 100 mM and 200 mM NaCl was studied on the content of assimilatory pigments, to 7 local populations of common beans, collected from areas with saline soils, from Nord-East of Romania and grown under greenhouse conditions, at the pots. The experiment is part of a broader research, and the determination of pigment content is only one stage of this research, because and other physiological and biochemical parameters are analyzed. 15 days after treatment the content of chlorophyll a, chlorophyll b and carotenoids pigments showed higher values compared with analyzes performed after 30 days. The overall objective of the research is to contribute to a better understanding of the physiological mechanisms involved in the saline stress tolerance of Phaseolus vulgaris L., identification of local populations of salinity-tolerant beans and their use in breeding programs of this species. As novelty, in the current study, new genotypes were found of bean, from Nord-East of Romania, tolerant to this factor.

Keywords


carotenoids; chlorophyll; Phaseolus; salt stress

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DOI: http://dx.doi.org/10.15835/buasvmcn-hort:2019.0007


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