Impact of waterlogging stress on yield components and chemical characteristics of Barley (Hordeum vulgare)

The aim of this trial was to assess the effect of waterlogging on spike weight, grain weight per spike, dry leave weight, dry culm weight, total weight, contents of chlorophyll and mineral, amino acids and organic acids in barley. Barley under waterlogging stresses exhibited growth reduction and photosynthesis declination as reflected by decline in spike weight grain weight per spike dry leave weight dry culm weight total weight and chlorophyll content. Prolonging waterlogging caused decrease in N, P, K, Ca, Mg, Na, Zn and total amount of minerals; whereas toxic minerals, Fe, Cu and Mn increased. Increased timing in excess water made a considerable increase in levels of amino acids organic acids. While oxalic, propionic, butyric, lactic, citric, malic and abscisic acids increased; decreases were recorded in levels of giberellic, salicylic, indole acetic acids and total organic acids with increasing timing of waterlogging. In conclusion, prolonging waterlogging has significant effect on yield components, levels of minerals, amino acids and organic acids in barley. Ince genotype showed better performance and more resistance to waterlogging than Kalayci.