Chlorophyll content index of some NE-Romania Phaseolus vulgaris L. local cultivars, under salt stress

Abstract

Soil salinity is a significant limiting factor affecting crop productivity in many areas of the world. The development of salt-resistant crops has made very limited progress despite tremendous efforts. From this reason, the capitalization of salt tolerance variability in local landraces should be a first step in plant breeding for the improvement of salt tolerance of cultivated species. Phaseolus vulgaris L is a species particularly sensitive to salt stress A decrease in chlorophyll content under salt stress is reported as a commonly phenomenon in various studies. For this reason, the aim of this work was to determinate the effect of NaCl excess on chlorophyll content index at 19 common bean local landraces, at different growth stages, as an indicator of salt stress tolerance. After NaCl treatments, the most salt sensitive local landraces were Tudora 1, Bals 1, Copalău 2 and 3, Iezer 2, Mosna 6, and the most tolerant Coropceni 1 and 2, Iezer 4 and 5, Mosna 3 and 5, Săveni 1 and 7 and Trusesti 5.