Light spectrum modifies the drought-induced changes of glutathione and free amino acid levels in wheat

Abstract The proposed spectral control of the adaptive metabolic responses to drought was tested by comparison two wheat genotypes with different stress tolerance. White light used as reference see effects three altered ratios blue, red, and far-red components, which conditions are referred pink, lights. Under all conditions, greatly reduced growth both genotypes. However, glutathione content decreased proline level increased, independently spectrum, only in sensitive genotype. Far-red amount cystine disulphide during resulted their lower compared forms tolerant maintained more reducing redox environment contributes its better In light, induced a greater accumulation several free amino acids (mHis, Val, Ile, Leu, Asn, His, Tyr, Lys, Arg) genotype, while smaller one genotype other conditions. transcript genes related acid metabolism also between under this condition. present results indicate adjustment levels observation can serve basis for spectrum-dependent modification protective metabolites (glutathione, proline) crops reduce stress-induced damages.