2006•Xi'nan Nongye Daxue xuebaoRequires access
PHYSIOLOGICAL MECHANISM ADAPTATION TO SOIL DROUGHT BY THE LEAVES OF WINTER WHEAT SEEDLINGS
Xiujuan Ren
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Abstract
Two winter wheat cultivars were grown in a pot experiment and were subjected to 4 water treatments(normal water supply,light drought, medium drought and severe drought) from seedling emergence to early tillering stage and various physiological indicators of the leaves were determined.Leaf water potential,leaf RWC(relative water content),mean transpiration rate and stomatal conductance decreased with soil water,and leaf WSD(water saturation deficit),soluble sugar content,proline content,permeability of plasma membrane and SOD and POD activities increased with decreasing soil water.It is thus concluded that wheat leaves changed their inner physiological characters and decreased their transpiration rate as a response to water stress.