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

Rebah, Fedia and Ouhibi, Chayma and Alamer, K. H. and Msilini, Najoua and Nasri, Mouhiba Ben and Stevens, Rebecca and Attia, Houneida (2018) Comparison of the responses to NaCl stress of three tomato introgression lines. Acta Biologica Hungarica, 69 (4). pp. 464-480. ISSN 0236-5383 (print); 1588-256X (online)


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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 Ca2+. 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.

Item Type: Article
Additional Information: MTA KFB támogatási szerződés alapján archiválva
Uncontrolled Keywords: antioxidant enzymes; ascorbate; introgression lines; salinity; tomatoes; variability
Subjects: Q Science / természettudomány > QH Natural history / természetrajz
Depositing User: Violetta Baliga
Date Deposited: 06 Mar 2019 09:45
Last Modified: 31 Dec 2019 00:35

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