Biotic and abiotic stress tolerance in plants
Answers
give brainliest answer and thanks
Tolerance of plant refers to its capacity to survive and reproduce under environmental stresses . Plants are subjected to many forms of environmental stress. Some are abiotic physicochemical, such as drought, cold, heat and high salinity, and some are biotic such as bacteria, viruses, fungi, parasites, beneficial and harmful insects, weeds, and cultivated or native plants.
Explanation:
A crucial step in plant defense is the timely perception of the stress in order to respond in a rapid and efficient manner. After recognition, the plants’ constitutive basal defense mechanisms lead to an activation of complex signaling cascades of defense varying from one stress to another .
Specific ion channels and kinase cascades are activated, reactive oxygen species (ROS) phytohormones like abscisic acid (ABA), salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) accumulate, and a reprogramming of the genetic machinery results in adequate defense reactions and an increase in plant tolerance in order to minimize the biological damage caused by the stress .