Jasmonates induce growth and modulation in pigments and vitamins of Brassica oleracea var. capitata, italica and botryti
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BIOCHEMISTRY & PHYSIOLOGY - ORIGINAL ARTICLE
Jasmonates induce growth and modulation in pigments and vitamins of Brassica oleracea var. capitata, italica and botrytis edible heads (foliage/inflorescence) Geetika Sirhindi1 · Shruti Kaushik1 · Ruqia Mushtaq1 · Poonam Sharma1 · Neha Dogra1 Received: 5 March 2020 / Revised: 27 July 2020 / Accepted: 5 September 2020 / Published online: 6 October 2020 © Botanical Society of Sao Paulo 2020
Abstract Jasmonates (JAs) are a rising class of lipid-derived signalling molecules with varied functions ranging from induction of abiotic and biotic stress-responsive genes to regulation of plant growth and development under natural condition. The rationale of present study was to investigate the nutritional importance of JAs in inducing and triggering accumulation of carbohydrates, sugars, nutritional pigments and vitamins in three varieties of Brassica oleracea L. (variety botrytis, capitata, italica) edible heads. Exogenous application of Jasmonic acid (JA) and methyl ester of Jasmonic acid (Me–JA), made edible heads of var. botrytis, capitata and italica nutritionally more accrete as compared to control untreated edible heads. Results showed that the treatment of JA and Me-JA enhanced growth of edible heads in terms of head diameter, head length, fresh weight, dry weight, moisture content, total protein, total starch, total carbohydrates, total soluble sugar, non-reducing sugar, vitamins C, A, E and B2 in var. botrytis but at the same time dramatic decline in reducing sugar, beta-carotene and lycopene was seen. In var. capitata certain reduction in vitamin E accumulation was recorded by the exogenous application of JA and Me–JA while overall growth of edible heads was accelerated which could also be supported by enhanced nutritional and productivity level. In variety italica, JAs reduced total starch and vitamin C, but overall growth was surged along with productivity. Both JA and Me-JA could be attributed to induce growth and enhance the nutritional potential of edible heads in three varieties of Brassica oleracea as compared to their untreated control edible heads. From the present results, it has been suggested that these two eco-friendly oxylipins can be further explored for enhancing the growth and nutritional value of these vegetables by exogenous application of JAs in μM to pM concentration. Keywords Carbon skeleton · Exogenous application · Nutritional importance
1 Introduction Nutrient composition of vegetables like Brassica can be attributed to diverse metabolic activities occurring in plants during their various stages of growth and development. The metabolites produced in plants can be classified broadly into two levels as primary and secondary metabolites such as carbohydrates, sugars and amino acids are the intermediates or the end products of one or other level of primary metabolism of photosynthesis and respiration. These primary metabolites act as precursor for secondary metabolites such as vitamins, proteins, phenols and other phytochemicals * Geetika Sirhind
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