Abstract
The effect of homobrassinolide (HBL) sprayed in four different concentrations viz., viz., 0.5µM, 1.0µM, 2.0µM, and 3.0µM on the metabolites viz., chlorophyll pigments, carbohydrate fractions (reducing sugars, non-reducing sugars, total sugars and starch) and soluble proteins present in turmeric plants grown in the semi-arid tropics of Nizamabad was studied. The soil of Nizamabad is known to posses high concentrations of salt and the place is usually a semi-arid tropical area where the crops are prone to drought and salt stresses and foliar application of HBL is to ameliorate these stresses and improve the metabolites of turmeric plant. All the four concentrations of HBL played a very positive role in ameliorating the saline stress and enhanced the metabolite contents viz., chlorophyll pigments, carbohydrate fractions (reducing sugars, total sugars, total sugars and starch), and soluble proteins in turmeric plants. HBL at 3.0μM was found most effective in increasing chlorophyll pigments, carbohydrates and soluble proteins compared to the other treatments as well as control plants.
Highlights
Plant Growth Regulators (PGRs) organize and help in adjustment of the physiological, atomic and biochemical instruments to build pressure resilience for development and improvement in crop plants [1, 2] and among the recently included PGRs, BRs have been the subject of sharp enthusiasm for plant scientists for their role in growth and metabolism of plants under normal as well as stressful environment
The present research study is undertaken to give an insight on the application of homobrassinolide (HBL) on metabolites viz., chlorophyll pigments, carbohydrate fractions and soluble proteins present in turmeric plants grown in the semi-arid tropics of Nizamabad
All the four concentrations of homobrassinolide (HBL) increased the total chlorophylls content of turmeric leaves as compared to untreated control leaves of turmeric (Table 1). 3.0 μM HBL was found to be most effective in enhancing the chlorophyll levels of turmeric plant
Summary
Plant Growth Regulators (PGRs) organize and help in adjustment of the physiological, atomic and biochemical instruments to build pressure resilience for development and improvement in crop plants [1, 2] and among the recently included PGRs, BRs have been the subject of sharp enthusiasm for plant scientists for their role in growth and metabolism of plants under normal as well as stressful environment. Brassinosteroids (BRs) are fundamental low molecular weight PGRs (plant growth regulators) that are omnipresent all through the plant kingdom [3] and were first reported by Mitchell et al [4] in ‘Nature’ depicting the growth promoting activity of Brassica napus L. pollen extricates at very low amounts. The cascades of research on these potential PGRs is gaining much importance and the research studies on BRs clearly depict their ability to mitigate various biotic (bacteria, virus, fungi, nematodes) and abiotic (temperature, salt, drought, metal, water) in plants [5, 6, 7,]. Turmeric (Curcuma longa L.) plant belongs to ginger family (Zingiberaceae). Curcuma longa L. is sterile as is incapable of producing seeds. It is widely propagated from its rhizomes. The present research study is undertaken to give an insight on the application of homobrassinolide (HBL) on metabolites viz., chlorophyll pigments, carbohydrate fractions (reducing sugars, non-reducing sugars, total sugars and starch) and soluble proteins present in turmeric plants grown in the semi-arid tropics of Nizamabad
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