Abstract
To investigate the effect of saline and/or sodic waters on growth and ionic concentration in sunflower, ten genotypes were grown in solution culture. Five treatments of irrigation water viz. T1 (control), T2 (EC 10 dS m-1), T3 (SAR 20 mmol L-1) 1/2, T4 (RSC 5.4 meL-1), T5 (EC 10 dS m-1) + (SAR 20 mmol L-1) 1/2 + (RSC 5.4 meL-1), having different ECiw, SAR and RSC were used. Root/shoot fresh and dry weight and K+ /Na+ in plant samples were determined. Growth parameters and ionic analysis showed a differential response to varying levels of salinity and/or sodicity. Also variations existed among genotypes for their response to all stress levels. SF-187 was ranked as tolerant because this genotype produced the maximum shoot fresh weight (SFW) and K+ /Na+ ratio at all stress levels. The genotypes Hysun-33 was ranked as salt sensitive along with Hysun-38 which was at par with Hysun-33.
S.A. Hussain*, * , J. Akhtar, , M. Anwar-ul-Haq, , M.A. Riaz , Z.A. Saqib. (2008) Ionic concentration and growth response of sunflower (Helianthus annuus L.) genotypes under saline and/or sodic water application , The Journal Soil & Environment , Volume 27, Issue 2.
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