Salt Resistance of Tomato (Lycopersicon esculentum Mill.) Cultivars Produced in Benin at Germination Stage

Abstract

Aims: In this research study, salt resistance level of seven tomato cultivars grown in Benin, namely Akikon, Tounvi; F1 Mongal, Petomech, Padma, TLCV 15 and Thorgal was evaluated at the germination stage.
 Study Design: The experiment was laid out as a completely randomized design with four replications.
 Place and Duration of Study: The experiment was carried out in the Laboratory of Plant Physiology and Abiotic Stresses Study of University of Abomey-Calavi, Republic of Benin from May to June, 2017.
 Methodology: Seeds were submitted to treatment with four NaCl concentrations (0; 30; 60 and 90 mM NaCl) in Petri dishes. Seed germination was checked every day during ten days incubation period. Four replicates of 40 seeds each were used.
 Results: NaCl reduced seed germination rate in all cultivars from day 2 to day 10 and the germination index proportionately to NaCl concentration. At the end of the 10 days, salt stress reduced the final germination percentages with a significant difference among cultivars: cultivars F1 Mongal followed by Akikon, Thorgal, TLCV15 and Tounvi were less affected in comparison with the two other cultivars. Salt Tolerance Index was significantly variable according to the cultivar with the highest values for cultivars F1 Mongal (1.086), Akikon (1.028), TLCV15 (1.005) and Tounvi (0.989) and the weakest value for cultivar Petomech (0.436).
 Conclusion: NaCl stress delayed seed germination and reduced the rate of final germination. Salt Tolerance Index was variable among the seven cultivars. Based on this criterion, cultivars F1 Mongal, Akikon, TLCV15 and Tounvi were the most salt-resistant whereas Petomech was the most salt-sensitive at germination stage.

Response of seven tomato (Lycopersicon esculentum Mill.) cultivars produced in Benin to salinity stress at young plant stage

“…Crop production in saline areas largely depends upon successful germination, seedling emergence and establishment and efficient reproductive phase (Bartels and Sunkar, 2005). Although most and eventually all cultivated plants are glycophyte species, their overall responses to increasing NaCl dose appear to be species-specific (Wouyou et al, 2016 and2017;Kpinkoun et al, 2018 andKinsou et al, 2019). Moreover, within a given species, a substantial variation in salt sensitivity may occur among cultivars (Ould Mohandi et al, 2011;Manaa et al, 2011).…”

Evaluación del Sargazo (Sargassum spp.) como componente de sustratos agrícolas

“…Así mismos, la apariencia de las plántulas coincide con lo descrito por Kinsou et al (2019) y Baruah et al (2019) quienes mencionan que algunos síntomas por exceso de metales son: desarrollo limitado o deformación de radícula, quemaduras de testas y/o radículas SUSTAINABLE AGRICULTURE (visualmente identificado por oscurecimiento o coloración intensa) y supresión del desarrollo del embrión reflejado en una disminución en el porcentaje de germinación o en la velocidad de esta.…”

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“…However, despite a substantial amount of literature on response of tomato to salinity stress, little information is available on salt resistance of tomato cultivars produced in Benin. In our previous study, we have demonstrated that there is a variability of relative salt-stress resistance among the same tomato cultivars at the germination stage (Kinsou et al, 2019). Since salt-resistance at the germination stage is not necessarily correlated with salinity resistance at subsequent developmental stages, the present study aims at evaluating NaCl stress effects on young plant growth of the same seven tomato cultivars grown in Benin.…”