HSPs have also been found to be upregulated by various other abiotic stresses such
as heavy metals, flooding, oxidative stress, etc.
1.4
Conclusions
Various abiotic stresses affect plant’s phenology, disrupt metabolic activities at
physiological, cellular, and molecular levels. Such changes unfavourably affect the
growth and development of plants and in field crop species even significantly reduce
the crop yield. The various stress factors are transduced through signal transduction
pathways. The components involved in such pathways are calcium, ROS, protein
kinase, etc. The stress signals further regulate transcription factors and thereby
controlling gene regulation. Future studies are required focussing on different crop
plants, to explore regulatory mechanisms; for example, MiRNA, alternative splicing,
and cross-talk between different pathways. Such biotechnological studies using
molecular approach would help to develop stress resistant and tolerant crops.
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