Assessment of salinity tolerance on chili pepper genotypes

Abstract

Population diversity is necessary in selecting salinity tolerant plants. The objective of the study was to evaluate the tolerance of chili pepper (Capsicum sp.) to salinity stress. The evaluation was carried out artificially in a greenhouse. Twenty-four accessions of chili were grown on hydroponic media with stress treatment of 3000 ppm and 6000 ppm NaCl. As a comparison, the control was planted without NaCl. Nutrients were given from the AB mix nutrient solution containing macro and micronutrients. The study used a completely randomized design with 3 replications. To evaluate the ability of the genotype to adapt to NaCl stress, the difference between control and observations at 6000 ppm NaCl stress was calculated. The results showed that the growth of chili pepper genotypes under NaCl stress varied widely. There was an interaction between the genotype and the stress level of NaCl on leaf greenness and the number of stomata. In general, the stress of 3000 ppm NaCl significantly reduced chili performance starting from 6 weeks after transplanting. The stress of 6000 ppm NaCl caused some sensitive plants to die at 8 weeks after transplanting. The tolerant genotypes at 6000 ppm NaCl stress were A10, A21, and A33.

The Impact of Reducing Salt Stress on the Yield and Quantitative Characteristics of Capsicum annuum L. Chilli Pepper Using Polyamine and Salicylic Acid

“…This occurs due to an imbalance in ions, which causes the plant to accumulate toxic ions such as sodium and chlorine [29] and reduces the absorption of important nutrients such as calcium, phosphorus, nitrogen, and others. [30] Physiological processes are also disrupted [31] as the soil is examined for untreated plant (control), it caused a buildup of sodium chloride and adversely affected the majority of plant features. Our result are consistent with [31,32].…”

“…[30] Physiological processes are also disrupted [31] as the soil is examined for untreated plant (control), it caused a buildup of sodium chloride and adversely affected the majority of plant features. Our result are consistent with [31,32]. By increasing salt stress, it causes inhibition of the photosynthesis process as a result of the partial closure of stomata and decreased gas exchange, which affects the growth of chloroplasts and an imbalance in the concentration of pigments, including chlorophyll pigment.…”