Abstract
Gradient creation of external osmotic potential with NaCI reveals physiological traits of a plant species. Brassica campestris (cv. BSA) and B. juncea (cv. BARD-1) were grown for six weeks in nutrient solution of various osmotic concentrations (- 0.19, - 0.27, - 0.31 and - 0.42 MPa) using NaCI. Shoot and root length of B. campestris and root length of B. juncea declined with increasing osmotic potential as compared to control. In B. juncea, ~ 0.19 MPa \lis favored accumulation of K+ and dry mass besides maintaining higher relative water contents. Shoot of B. juncea maintained higher concentration of Ca2 +and K+ ions than that of B. campestris at all levels of external osmotic potential. Sodium ion was in antagonistic relation with K+, Ca2 +, P and S. In shoot of B. juncea K+ and Ca2 + were in synergistic relation with Na+ up to - 0.31MPa, above this, both the nutrients started to decline. Under increasing osmotic conditions relative growth rate, leaf area ratio and relative water contents of both the species were affected.

Rehana Asghar, M Salim. (2006) Growth and ionic relations of Brassica campestris and B. juncea (L.) czern and coss, , Volume 43, Issue 3,4.
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