Alleviation Of Salinity Stress In The Seeds Of Some Brassica Species

Abstract

Uptake of various salt and sugar solutions by Brassica varies with change in species and temperature. The seeds of B. nigra show a dormancy period of 6 months, whereas other species germinated immediately. The seeds generally not sensitive to photoperiod, however, exposure to extended dark period reduced seed germination. Brassica nigra and B. juncea show medium tolerance up to 1 percent salinity level but at 1.5 percent level tolerance decreases by 32 %. An application of IAA and GA 3 alleviates the salinity stress up to 1.5 % level and to some extent at 2% level. Alleviation of salt stress occurred more in B. juncea than B. nigra. In B. oleracea var. botrytis and B. oleracea var. oleracea the application of growth regulators improves germination and seedling growth.