Field study of the effects of excess copper on wheat photosynthesis and productivity

摘要: Abstract Copper concentration in wheat plants growing a Cu-contaminated area, was 3.5-times higher than that of the control, while total chlorophyll (a + b) content an ore site significantly reduced. The significant decline Cu-stressed relation to decrease a/b ratio indication poor condition those and lack adaptive adjustment pigment concentrations high Cu levels. Plants grown soils displayed smaller height length ear produced fewer seeds spikelets per ear, grain filling development were negatively affected. relative assimilation rate for stressed 90%. Increased levels soil led stomatal conductance (43%) transpiration (10%). water use efficiency (i.e. between leaf photosynthesis transpiration) stre...