Biochemical attributes of Indian mustard (Brassica juncea) and rapeseed (B. napus) as influenced by salicylic acid and benzothiadiazole
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Abstract
A field experiment was conducted during 2011-12 at Punjab Agricultural University, Ludhiana, India to assess the effect of foliar application of elicitors viz., salicylic acid (SA) and benzothiadiazole (BTH) on biochemical constituents of Brassica seeds. Seeds of Brassica juncea and B. napus were sown in the field during rabi season. Four different treatments of elicitors along with a fungicide and control were given to 10 week old plants up to four consecutive weeks. After harvesting, the seeds were analyzed for oil, total soluble protein and glucosinolate content. Results indicated that the elicitor treatments increased the oil, total soluble protein and glucosinolate content in seeds of both the Brassica species. In B. juncea, BTH (7 ppm) + SA (17 ppm) showed 12.5% higher oil content than control. In B. napus, the combinations of elicitors viz., BTH (3 ppm) + SA (33 ppm) and BTH (7 ppm) + SA (17 ppm) exhibited 15% increase in oil content compared to control. Treatment containing BTH (3 ppm) + SA (33 ppm) showed 18.72 and 15.86% higher total soluble protein content in B. juncea and B. napus seeds, respectively compared to control. In B. juncea, BTH (3 ppm) + SA (33 ppm) exhibited 7.13% higher glucosinolate content compared to control. In B. napus, BTH (7 ppm) + SA (17 ppm) showed 11.23% higher glucosinolate content than control. In conclusion, the application of elicitors, i.e., SA and BTH could be a useful tool for improving the nutritive value of B. juncea and B. napus seeds.
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Benzothiadiazole, Brassica, Glucosinolate, Oil, Total soluble protein, Salicylic acid
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