Effects of salicylic acid on seedling growth and nitrogen metabolism in cucumber (Cucumis sativus L.)

Effects of salicylic acid on seedling growth and nitrogen metabolism in cucumber (Cucumis sativus L.)

Автор: Singh Pramod Kumar, Chaturvedi Varun Kumar, Bose Bandana

Журнал: Журнал стресс-физиологии и биохимии @jspb

Статья в выпуске: 3 т.6, 2010 года.

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Salicylic acid is involved in the regulation of metabolic activity and defense mechanism in plants under various stress conditions. Present study was conducted to determine the effects of salicylic acid (10 to 500 ƒM) on seedling growth, development and nitrogen use efficiency in cucumber (Cucumis sativus L.) plants with or without nitrogen nutrient. Salicylic acid increased contents of chlorophyll, total non-structural carbohydrate and total nitrogen, as well as nitrate assimilation through the induction of nitrate reductase (EC 1.6.6.1) activity in isolated cucumber cotyledons. Accumulation of salicylic acid was two-fold higher in cotyledons without nitrate supply in comparison to that with nitrate supply. Further 50 ƒM of SA induced enhancement in seed germination and growth characteristics. However higher salicylic acid concentrations inhibited above physiological characteristics. Results show that, field application of salicylic acid need optimum physiological concentration (e.g., 50 ƒM) to increase nitrogen use efficiency particularly during germination and seedling growth.

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Cucumber (cucummis sativus l.), cucumber cotyledons, nitrate-nutrition response, nitrate reductase activity, salicylic acid

Короткий адрес: https://sciup.org/14323485

IDR: 14323485

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