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ISHS Acta Horticulturae 1112: XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014): International Symposia on Water, Eco-Efficiency and Transformation of Organic Waste in Horticultural Production

Drought stress alleviation of cabbage seedlings by citric acid application

Author:   K. Miyazawa
Keywords:   Brassica oleracea var. capitata, ozone, oxidation, hydrogen peroxide, transplanting, plug seedling
DOI:   10.17660/ActaHortic.2016.1112.14
Abstract:
The application of citric acid (CA) to cabbage seedlings can alleviate drought stress imposed at transplanting. To understand the mechanisms of drought stress alleviation, soil water depletion, growth, nutrient uptake, and hydrogen peroxide concentration of seedlings were evaluated with and without the application of CA. When applied as a pre-transplanting treatment with withholding of irrigation afterwards, the application of CA did not reduce soil water depletion after. As a pre-transplanting treatment but without subsequent drought stress, CA had no effect on seedling growth but increased phosphorus uptake. However, hydrogen peroxide accumulation showed a slight decline when CA was applied. The application of exogenous CA may reduce drought stress via oxidative stress alleviation.

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