Waterlogging is an important factor influencing yield and yield components in wheat. The objective of this study was to evaluate the effect of waterlogging on yield, yield components, protein and proline content, and chlorophyll a and b in wheat. In the study, seven levels of waterlogging treatment, 0, 5, 10, 15, 20, 25 and 60 days of flooding were applied. Increasing waterlogging stress decreased yield, spike number per m 2 , seed weight and number per spike, protein content, and chlorophyll a and b; and caused increase in proline content. Results indicated significant linear responses for yield, spike number per m 2 , seed weight and number per spike, protein content, chlorophyll a and b.
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