Amelioration of drought stress by ascorbic acid, thiamin or aspirin in wheat plants
2000
Hamada, A.M. (Assiut University, Egypt (India). Botany Department)
The effect of water deficit (100%, 70%, 50% and 30% field capacity) and ascorbic acid, thiamin or salicylic acid (100 ppm) and their interaction on some relevant metabolic changes of wheat plants (Triticum aestivum L.) were studied. Most of the cell wall components (pectin, hemicellulose, cellulose and lignin) of shoots and roots, soluble protein of shoots and other free amino acids of roots were reduced with the reduction of soil moisture content for 15 days, in the range studied. On the other side, the decreasing of soil moisture content induced progressive increase in soluble sugars, starch, proline contents of shoots and roots, other free amino acids of shoots and soluble protein of roots. Soaking of wheat grains in 100 ppm ascorbic acid, thiamin or salicylic acid before sowing did not improve pectin, hemicellulose of shoots and roots, cellulose of shoots, lignin of roots, other free amino acids of roots and soluble protein of shoots, whereas cellulose of root and lignin of shoots of soaked seedlings increased with decreasing soil moisture content. However, soluble protein, proline of roots and proline and other free amino acids of shoots was increased with the decrease of soil moisture content, but these effects were lowered to a greater extent under drought with vitamins or aspirin than drought only.
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