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Evaluations morphological, physiological and biochemical of three tomato varieties (Lycopersicum esculentum) under salt stress at the University Jean Lorougnon Guede (Côte d’Ivoire)

By: Ayolié Koutoua, Kouassi N’dri Jacob, Yapo Sopie Edwige Salomé, N’guessan Affoué Sylvie Rachelle, Kouakou Tano hilaire, Kouadio Yatty Justin

Key Words: Salt stress, NaCl, Tomato, Lycopersicom esculentum, Greenhouse

Int. J. Biosci. 9(3), 99-107, September 2016.

DOI: http://dx.doi.org/10.12692/ijb/9.3.99-107

Abstract

Tomato, Lycopersicom esculentum Mill is a glycophyte plant, sensitive to salinity. However, the accentuated climate change causes abiotic (salinity) and biotic stress reducing plants production. Methodology: To better tame these plants, it is important to understand the mechanisms revealed during stress. Indeed, four concentrations of NaCl (0, 2, 4 and 6 g/L) were applied to seedlings of three tomatoes varieties grown in pots under greenhouse. Thus, morpho-physiological and biochemical behavior of varieties (Petomech, UC82B and Tropimech) were evaluated. Results: The results show that NaCl significantly reduces the morphological parameters. However, this reduction is pronounced in 6 g /L (NaCl). In physiological level, the NaCl significantly reduced water content of plant, chlorophyll a, b and total and the carotenoid. This reduction is independent of variety studied. Moreover, at biochemical level, proline increases with increasing salt concentration. Other side, catalase and ascorbate peroxidase, activity decreases significantly with increasing NaCl. After this work, all parameters studied were used to explain mechanisms involved in metabolism of tomato plants grown under salt stress.

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