ABSTRACT
Extreme temperature and water conditions, polluted soils along with high salt concentrations are the climatic conditions detrimental to plant growth and development, causing severe yield losses for food crops also. Drought is a severe harm toward crop productivity and yield; it must be a major emphasis of research. About 27.6% crop yield reduction had to be faced in 2012 by the US. Pfannschmidt reported plastidial retrograde signaling between metabolically active plastid and nucleus. There is a regular communication between organelles and nucleus because most of the enzymes catalyzing in these organelles translated from the nucleus. Drought stress alters the biochemical features of the plants along with the operation of concerned genes and proteins. Drought stress signaling has been studied thoroughly at all the cellular levels. Signaling in stress also highlights the inherent capability of the plant to cope with the extreme environment.
