Abstract
SUMMARYA hydroponic study was conducted to evaluate the performance of fivesunflower hybrids, i.e., PARSUN, SH-3322, XF-4623, SMH-9706 and XF- 4619, at 0, 75 and 150 mM NaCl salinity in root medium. Sunflower (Helianthusannuus L.) seeds were germinated in moist quartz sand, twelve-day old seedlings were foam plugged in lids of plastic pots containing 2.5 l of continuosly aerated half-strength Hoagland’s nutrient solution. The experiment was organized in completely randomized design (CRD) using four replications. Sunflower growth deceased drastically with increasing concentration of NaCl in root medium. Sunflower hybrid XF-4619 registered maximum shoot and root fresh weight, stem diameter and leaf area. Furthermore XF-4619 exhibited the least decrease in these parameters under saline conditions. XF-4619 exhibited 14 and 53% decrease in shoot fresh weight, 11 and 35% decrease in root fresh weight, 6 and 34% decrease in stem length, 12 and 34% decrease in stem diameter, 10 and 40% decrease in leaf area, 2 and 31% decrease in root dry matter and 13 and 50% decrease in shoot dry matter yield at 75 and 150 mM NaCl, respectively, as compared with the control. Moreover, Ca and K were also efficiently taken up by XF-4619 in saline and non-saline root medium. This is indicative of it having better yield potential than the other commercial sunflower hybrids.
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