Dynamics of Plant Water Uptake Under Modified Environment

The environmental control of crop physiology increases relative sensitivity of crop water movement within the soil plant atmosphere continuum (SPAC), so as the dynamics of crop water usage under modified climate. The variable environmental conditions determines the relative direction of change. Elevated CO2 exposure depressed the water movement of transpiration flux through reduced stomatal conductance and facilitate partial stomatal closure. However, the net impact may not be ensued the significant reduction in crop water usage at the end of crop season due to modified leaf area dynamics, but with obvious rise in crop water use efficiency (WUE). Thermal stress are often combined with drought events depressed crop WUE beyond a threshold sourced from adverse impact on total dry matter production under elevated temperature condition. The pathogenic role O3 exposure induced stomatal sluggishness and reduction in dry matter accumulation (or yield) are sourced from reduced photosynthetic assimilation and aberration in stomtal conductance thereby reduction in crop WUE under well-watered condition. However, the protective role of other co-existing abiotic stress factors are subjected to more explanatory research. The genetic resilience towards such climate change induced abiotic stress factors and supportive field management options will provide our future facets of sustainable crop production towards higher crop WUE under variable environmental conditions.