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Drought stress memory and its relationship with morpho-physiological, biochemical and molecular changes in crop plants
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Fatemeh Saeidnia   , Rasmieh Hamid |
| Field and Horticultural Crops Science Research Department, Khorasan-e-Razavi Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization, Mashhad, Iran |
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Abstract: (72 Views) |
The uneven distribution of rainfall caused by global warming will lead to more irregular and multiple abiotic stresses such as heat, drought, cold stresses or the combination of them. Developing stress-tolerant plants is the purpose of most plant breeders to develop cultivars that are high yielding with yield stability. Plant responses to drought stress have been evaluated in many different species, but the occurrence of stress memory as well as the potential mechanisms for memory regulation have not yet been well described. It has been observed that plants are able to memorize past events in a way that adjusts their response to new challenges without changing their genetic constitution. This ability could enable the plants to face upcoming challenges. A better understanding of the mechanisms associated with the stress memory leading to change in gene expression and how they link to physiological, biochemical, metabolic and morphological changes would initiate diverse opportunities to plant breeders to develop stress-tolerant genotypes through molecular breeding or biotechnological methods. In this perspective, this review discusses different types of stress memory in crop plants and gives an overall view using general examples. Moreover, with focusing on drought stress, we demonstrate coordinated changes in epigenetic and molecular gene expression control mechanisms, the associated transcription memory responses at the genome level and integrated biochemical and physiological responses at cellular level following recurrent drought stress exposures. Indeed, coordinated epigenetic and molecular changes of expression of gene networks link to biochemical and physiological responses that facilitate acclimation and survival of crop plants during repeated drought stress.
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| Keywords: Drought stress, Epigenetic, Climate change, Intergenerational memory and Transgenerational memory |
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Full-Text [PDF 1079 kb]
(33 Downloads)
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Type of Study: Review |
Subject:
Special
Received: 2024/03/2 | Accepted: 2024/07/31 | Published: 2024/07/31
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