Germination and seedling growth of peanut mutants (Arachis hypogaea L.) under salt stress

Résumé

Peanut is an annual plant that self-pollinates.Because of its low genetic variability, it is vulnerable to biotic and abiotic constraints.Salinity is one of the major elements that create an adverse environment for the growth of most legumes, which influences plant development and production.To deal with this limitation, induced mutations have been used to improve tolerant plant varieties for the plants that are resistant and adaptable to changing environmental conditions.Consequently, this study aims to assess the germination, early seedling stage, and development stage along with morphological and physiological traits for three irradiated mutants at doses 100, 150, and 200Gy of two peanut varieties, Kp29 and Fleur11, under saline conditions.To test for salinity tolerance, the peanut plants were subjected to 0, 2.9, 5.8, 8.8 g/l NaCl.The obtained findings clearly show that the mutants irradiated at 150Gy and 200Gy were found to be the most salinity tolerant, having better performance and adaptation with significantly increased germination, plant growth aerial as well as root parts, chlorophyll content, and stomatal resistance, compared to unirradiated ones under salinity.

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