Super Eco

Abiotic stress is defined as nonliving environmental factors—such as drought, extreme cold or heat, and high winds—that have harmful effects on plants. Abiotic stress on crops affects the world's food supply. Drought is one of the most significant abiotic stresses. Forty percent of the world's agricultural land lies in arid or semi-arid regions. Other stresses include salt, cold, and environmental contaminants such as heavy metals.

Scientists explore the genetic diversity of crop plants in order to breed varieties adapted to abiotic stresses. For example, the US Department of Agriculture sponsors research to address the problem of wheat's sensitivity to drought and heat.

(Photo Credit: Lars Plougmann, Flickr)