Mechanisms of heat stress tolerance in maize

Manoj Kandel1*, Surya Kant Ghimire1, Jiban Shrestha2


High temperature has become a global concern because it severely affects the growth and production of crops. It causes an array of morpho-anatomical, physiological and biochemical changes in plants, which affect plant growth and development and may lead to a drastic reduction in economic yield. Plant growth and development involve numerous biochemical reactions that are sensitive to temperature. Heat stress causes an abrupt increase in the expression of stress-associated proteins which provide tolerance by stimulating the defense response in plants. Plants possess a number of mechanisms to cope with high temperature situations. The adverse effects of heat stress can be mitigated by developing crop plants with improved thermotolerance using various genetic approaches. This article reviews the recent information on responses and tolerance to high temperature stress in maize.

Keywords: Gene action, heat stresses, maize (Zea mays L.), tolerance mechanisms