Published in Scientific Papers. Series B, Horticulture, Vol. LXIII, Issue 2
Written by Beatrice Alexandra MODIGA, Mihaela COVAȘĂ, Cristina SLABU, Alina Elena MARTA, Carmenica Doina JITĂREANU
Surfaces affected by excess salinity arrived at 200 million ha., at the level of the whole planet and to about 400.000 ha in Romania; around 7% of the world's total the surface area is affected by salinity. Salinization is a frequent process and is a major constraint for food production because it limits yield of the crops. Cl- ion is dominant in saline substrates; it is essential as a microelement for all higher plants, but the high concentration of this ion leads to toxicity to the salt-sensitive plants; the stress caused by salinity is also a stress of dehydration. High salinity causes an internal water shortage, and plants that are affected by saline stress can sometimes develop xeromorphic structures. Therefore, in present study was pursued the influence of saline solutions of 100 mM and 200 mM NaCl on productivity of 7 local populations of common beans, collected from areas with saline soils, from North-East of Romania and grown under greenhouse conditions, in 2018. Thus, they were analyzed after 15 and 30 days of saline stress: the largest/ lowest amount of chlorine, the number of pods/plant and the weight of the grains/plant, elements that define productivity. As a result, the concentration of 100 mM and 200 mM NaCl negatively influenced the fruit weight against the control variant, to all the genotypes studied, and the Trușești 2, Blăgești, Săveni and Moșna genotypes recorded the highest number of grains/plants for the 100 mM variant and 200 mM.
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