Physiological Evaluation of Different Rice Genotypes to Two Salinity Level during Seedling Stage under Hydroponic System

Main Article Content

S. Lakshmi
V. Ravichandran
L. Arul
K. Krishna Surendar

Abstract

Hydroponics study was conducted to screen eight rice genotypes (CO 51, ADT 53, ADT 37, IR 64, CO 43, ASD 16, Pokkali; TRY 3) under salinity stress on early seedling stage. Two Saline treatments (75 and 100 mM NaCl) were given at 15 days old seedling; observations were recorded at 10 days after salt stress. Results showed that shoot length, root length, total fresh and dry weight, shoot and root fresh weight, shoot and root dry weight and root- shoot ratio were reduced under saline conditions compared to control. Na+ ion Concentration and Na+/ k+ ratio was higher in saline treatments than control. However, K+ ion absorption decreased with increasing salinity level. Electrolyte leakage and osmotic potential had increasing trend with increasing level of salinity. In this study, rice genotypes Pokkali, TRY 3 and CO 43 perform as tolerant; CO 51, ADT 53 and ASD 16 perform as moderately tolerant; ADT 37 is susceptible and IR 64 is highly susceptible. This type of study is required to develop salt tolerant genotypes at salt stress during seedling stage; to increase the growth and yield of rice there by satisfy the need of country’s requirement.

Keywords:
Rice, salinity, hydroponics, Na / k ratio, tolerant, susceptible

Article Details

How to Cite
Lakshmi, S., Ravichandran, V., Arul, L., & Surendar, K. K. (2020). Physiological Evaluation of Different Rice Genotypes to Two Salinity Level during Seedling Stage under Hydroponic System. International Journal of Plant & Soil Science, 32(8), 42-56. https://doi.org/10.9734/ijpss/2020/v32i830317
Section
Original Research Article

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