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Research Article Open Access
Influence of brassinosteroid correspondent viz. 24-epiBL and 28-homoBL were studied on morpho-physiological constraints of 10th DAS of Brassica oleracea viz. (cabbage, cauliflower and broccoli). Seed priming treatments with various concentrations of 24-epiBL and 28-homoBL (10–6 M, 10–9 M and 10–12 M) were applied and observed that BRs treatments encourages seed germination significantly as compared to untreated seeds on 3 and 4th DAS. Seed priming treatments with above mention concentrations of 24-epiBL and 28-homoBL exaggerated the morphology of 10th seedlings of cabbage, cauliflower and broccoli on various extents, as root length was found to be inhibited by all treatments in all the varieties but shoot length enhanced significantly in all varieties with all the treatments. Results also suggested that BRs works best on optimal concentration, i.e., 10–9 M in 24-epiBL. Photosynthetic pigments i.e. total chlorophyll, chlorophyll a and b, carotenoids were also influenced by the treatments of 24-epiBL and/or 28-homoBL but the influence was very much dose dependent and optimum dose was varying variety to variety. As there is a direct correlation between the photosynthetic pigment and carbohydrate synthesis so study also suggest that the accumulation of carbohydrate also ameliorated after seed priming treatments. In conclusion it was found that BRs works in dose dependent manner and optimum dose varying variety to variety. Broccoli responded most efficient to BRs treatments and 24-epiBL has more potential to promote morpho-physiological parameters of Brassica oleracea varieties.
24-epiBL, 28-homoBL, Brassica oleracea, Cabbage, Cauliflower, Broccoli, Photosynthetic pigments, Proteins, Carbohydrates, Applied Biochemistry