Enhancing plant physiology: Increased water use efficiency

Published on: 15:01PM Sep 03, 2009

Eric Tedford
Enhancing Plant Physiology

During the day, moisture evaporates from plant parts through transpiration. The rate of transpiration is determined by a number of factors, including light intensity, temperature, humidity, wind speed and soil water supply. Azoxystrobin increases the plant’s ability to use water efficiently and effectively, slowing down transpiration and reducing the adverse effects of water stress on yields. As a result, corn and soybean plants are better able to tolerate moisture stress conditions.
Plants regulate the exchange of water and gases through tiny pores called stomata. These pores are equipped with small guard cells that control the flow of water and gases through the opening. The guard cells act as a protective keeper and react in high stress situations to balance out water and gas exchange. In high-temperature or drought situations, the rate of transpiration increases. However, to prevent the plant from losing too much water, guard cells will close to regulate water loss. Azoxystrobin helps plants use this water efficiently and regulate the rate of transpiration.

This photo illustrates the beneficial effects of fungicide treatment (right) on corncobs and stalks relative to untreated corn (left).