Growth, photosynthetic activity, and potassium and sodium concentration in rice plants under salt stress

• DOI: 10.4025/actasciagron.v34i3.13687
• Publication Date: 2012-05-03T20:52:09Z
• Authors: Soledad García Mo...; Libia Iris Trejo-...; Fernando Carlos G...; Camila Caldana; David Espinosa-Vi...; Braulio Edgar Her...
• Keywords: Dry weight

Salt stress affects crop growth and productivity. In this study, we determined the growth, yield of photosystem II (PSII), K+ Na+ concentration in root, stem, old leaves, young leaves two Mexican varieties rice, Tres Ríos Cotaxtla. addition, K+/Na+ ratio stem root both was determined. The experiment conducted a chamber under controlled conditions, completely randomized distribution, with 2 x (Variety Salinity) factorial arrangement 12 replications. Plants were grown hydroponic solution for 15 days then some them treated 100 mM NaCl; control plants (without NaCI treatment) parallel. caused 20 15% reductions length, respectively, variety Ríos, while Cotaxtla no significant differences observed these variables compared to control. Dry matter weight decreased by 24% Ríos. quantum PSII 30% third day treatment application, varieties. significantly (p ≤ 0.05) higher NaCI-treated plants. eradicated six after implementation, older also lowest K+/ recorded, which could indicate that it is more susceptible salinity than