Comparison of the responses to NaCl stress of three tomato introgression lines

Abstract

We aimed to examine the response of three tomato introgression lines (IL925.3, IL925.5 and IL925.6) to NaCl stress. These lines originated from a cross between M82 (Solanum lycopersicum) and the wild salttolerant tomato Solanum pennellii, each line containing a different fragment of the S.pennellii genome. Salt-sensitive phenotypes related to plant growth and physiology, and the response of antioxidants, pigments and antioxidant enzymes were measured. In general, salt stress decreased the fresh weight of leaves, leaf area and leaf number and an increase of Na + accumulation in aerial parts was observed, which caused a reduction in the absorption of K + and Ca 2+. Salt stress also induced a decrease in chlorophyll, carotenoids and lipid peroxidation (MDA) and an increase in anthocyanins and reduced ascorbate, although some differences were seen between the lines, for example for carotenoid levels. Guaiacol peroxidase, catalase and glutathione reductase activity enhanced in aerial parts of the lines, but again some differences were seen between the three lines. It is concluded that IL925.5 might be the most sensitive line to salt stress as its dry weight loss was the greatest in response to salt and this line showed the highest Na + ion accumulation in leaves.

Retraction: Physiological Responses of Pea Plants to Salinity and Gibberellic Acid

“…The carotenoid and chlorophyll assay, which was conducted in this experimental study, showed a saltrelated decrease in carotenoids, chlorophyll a and total chlorophylls. Ozturk et al [47] showed that salt also significantly decreases chlorophyll a, total chlorophyll a and β-carotene content in pea, which is the same in tomato [48]. At the same time, addition of GA3 to culture medium with NaCl did not improve chlorophyll status of leaves, but decreased it further compared to that of leaves treated with salt.…”

Oxidative damage, antioxidant mechanism and gene expression in tomato responding to salinity stress under in vitro conditions and application of iron and zinc oxide nanoparticles on callus induction and plant regeneration

“…The intensification of various abiotic stresses has been changed into a major threat to the sustainable production of agricultural crops [ 4 – 6 ]. Plants show physiological, biochemical, and genetic responses to salinity stress [ 7 , 8 ]. Because of its ability to compete with essential materials, NaCl is one of the most vital factors of soil salinity, which leads to a lack of several nutrients in the plants, and causes toxicity of plants [ 9 ].…”