The Role of Plant Hormones as Modifiers of Sensitivity to Air Pollutants

1996

22 Lit. Ang.

Unselbständiges Werk

5943

200101806

The sensitivity of a plant to a particular pollutant depends upon the uptake capacity and the effectiveness of internal defence mechanisms. In this review we consider some of the ways in which plant hormones may be important in determining these qualities. Factors affecting the control of stomatal opening by ABA, and the manner in which pollutants might disrupt this regulation are discussed in the light of recent findings. Other hormones, e.g. volatile organic compounds such as ethylene, can enhance the injury potential of oxidising pollutants by directly reacting with them to form more harmful products.