ABSTRACT

Perennial woody plants are subjected to a variety of stresses (both bi­ otic and abiotic) throughout the year. Cold winters, hot and dry sum­ mers, insect pests, and diseases-all take their toll on fruit trees, forest plantings, and especially those landscape trees and shrubs that grow in poor edaphic conditions of urban situations and/or are exposed to stress­ ful city microclimates. Woody plants are enormously important and beneficial to our well-being (as source of food, fiber, lumber, pulp, rec­ reation and visual aesthetics, just to name few). Therefore, we must gain fundamental understanding (at molecular level) of how these plants re­ spond to various stresses, and strive to develop tougher plants with im­ proved resistance to environmental stress and/or the strategies to protect them from stressful conditions.