Drought-Induced Responses of Physiology, Metabolites, and PR Proteins in Triticum aestivum

Journal of Agricultural and Food Chemistry
Zuzana GregorováIldikó Matušíková

Abstract

The impact of severe drought stress (13% soil moisture) on the physiological responses, metabolic profile, and pathogenesis-related (PR) proteins in wheat above- and below-ground biomass after 20 days of treatment was studied. Drought depleted growth, assimilation pigments, and majority of free amino acids in the shoots (but proline increased considerably, +160%). On the contrary, root growth parameters were elevated, and free amino acids did not decrease, indicating investment of metabolites into the growth of roots under water deficiency. Mineral nutrients were only slightly influenced. Profiling of pathogenesis-related (PR) proteins revealed that chitinases (EC 3.2.1.14) and glucanases (EC 3.2.1.39) were activated in wheat by drought. Individual isoforms and their activity were rather stimulated under drought, especially in shoots. The expression of selected genes is in agreement with enzymatic data and suggests an organ (tissue) specific- and opposing behavior of these two types of defense components in drought-stressed wheat. Metabolic analyses at the level of phenolics showed an increase in the free and bound fraction of phenolic acids almost exclusively in the shoots and flavonoid isoorientin increased considerably: prot...Continue Reading

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Citations

Feb 12, 2020·International Journal of Molecular Sciences·Bhakti PrinsiLuca Espen
Aug 25, 2018·Scientific Reports·Albert Gargallo-GarrigaJosep Peñuelas
Jun 27, 2020·International Journal of Molecular Sciences·Hui WangPeisheng Mao
Oct 20, 2020·Ecology and Evolution·Caroline PonsCaroline Müller
Oct 16, 2020·Scientific Reports·Michael ItamHisashi Tsujimoto

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