EFFECTS OF SALINITY ON SEED GERMINATION OF HARICOT BEAN (PHASEOLUS VULGARIS L.)

Abstract

A Salinity is a dominant obstacle to the proper germination of seeds, growth of seedlings,and, consequently, the production of crops. The priming of seeds with different treating agents can effificiently impart salinity tolerance. Haricot bean a nutritious legume or vegetable crop in the world. Literature shows that salt stress negatively disturbs the germination of haricot beans. In the present research, we investigated the potentiality of haricot bean alleviate the salinity-inhibited germination . The seeds were treated with SA (0 mM and 1 mM,2 mM and 3 mM) adding with normal tap water . In addition, for the control experiment, untreated seeds were used. Finally, salt added seeds were subjected to salt stress (3 mM NaCl). Our results exhibited that salt stress considerably lowered the percentage of germination (GP), germination index (GI) shoot length (SL), root length (RL). The results also exhibited that salt stress significantly decreased the relative water content (RWC) and photosynthetic pigments such as chlorophyll, carotenoids, lycopene, and beta-carotene contents. The SA- and H2O2- stimulated the GP, GI, SL, RL. Data also revealed that the supplementation of SA and H2O2 enhanced RWC . When compared to other treatments, pretreatment with 1 mM SA was determined to be comparatively more effective at imparting the salt tolerance of haricot beans. Overall, these results, principal component analysis, an exogenous applications of SA and H2O2 can improve salt tolerance and enhance germination and seedling characteristics of haricot bean beans.