Published in Scientific Papers. Series B, Horticulture, Volume LXII
Written by Beatrice Alexandra MODIGA, Carmenica Doina JITĂREANU, Cristina SLABU, Alina Elena MARTA, Mihaela COVAȘĂ
From the environmental stress factors, salinity is one of the most important causes which affects the security of mankind. Impact of soils with excessive salinity on the productivity of different cultures is sometimes disastrous, which determines the identification and the creation of new genotypes of plants tolerant to osmotic stress conditions. From the viewpoint of stress concept, chlorine (Cl- ) is viewed as being biologically aggressive osmolite, based on its small ionic diameter and its strong tendencies to attract water (high hydration capacity). High concentrations of these ions in apoplast lead to imbalances in hydric and ionic relationships. For these reasons, stress caused by salinity is also a dehydration stress and ionic stress. In present study, it was pursued the influence of saline solutions of 100 mM and 200 mM NaCl on Cl- concentration and productivity, to 7 local populations of common beans (Phaseolus vulgaris L.) collected from areas with saline soils, in North-East of Romania and grown under greenhouse conditions, at the pots, analyzing the largest/lowest amount of chlorine in the leaves and the correlations between the chlorine content and the average number of pods/plants, the average number of grains/pods, the average weight of the grains/pods and the average yield/plant, indicators that define productivity.
[Read full article] [Citation]
