Expression Dynamics of Genes and microRNAs at Different Growth Stages and Heat Treatments in Contrasting High Temperature Responsive Rice Genotypes

The global warming-driven climate change is becoming a major challenge for rice cultivation in Asia and Africa. High-temperature stress impairs the physiology and growth of rice plant, and ultimately results in reduced grain yield. This study was aimed to decipher the physiological and molecular cha...

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Bibliographic Details
Published in:Journal of plant growth regulation 2022, Vol.41 (1), p.74-91
Main Authors: Bhogireddy, Sailaja, Babu, M. Suchandranath, Swamy, K. N., Vishnukiran, T., Subrahmanyam, D., Sarla, N., Voleti, S. R., Rao, P. Raghuveer, Mangrauthia, Satendra K.
Format: Article
Language:English
Subjects:
Agriculture
Biomedical and Life Sciences
Chlorophyll
Climate change
Crop yield
Cultivars
Cultivation
Gas exchange
Gene expression
Gene regulation
Genes
Genetic modification
Genome editing
Genomes
Genotypes
Global warming
Grain cultivation
Heat
Heat resistance
Heat stress
Heat tolerance
Heat treatment
Heat treatments
High temperature
Life Sciences
miRNA
Molecular machines
Physiology
Plant Anatomy/Development
Plant breeding
Plant Physiology
Plant Sciences
Rice
Seedlings
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Summary:The global warming-driven climate change is becoming a major challenge for rice cultivation in Asia and Africa. High-temperature stress impairs the physiology and growth of rice plant, and ultimately results in reduced grain yield. This study was aimed to decipher the physiological and molecular changes occurring during different growth stages of heat-tolerant (N22) and -susceptible (Vandana) rice cultivars under three different heat treatments. Chlorophyll content, membrane integrity, gas exchange parameters and expression of genes and miRNAs were analyzed in N22 and Vandana at seedling, vegetative, and reproductive growth stages after exposing to short and long duration of high temperature stress, and recovery. A number of genes and miRNAs showed dynamic changes in their expression patterns at different growth stages and heat treatments, highlighting the necessity to understand gene regulation before employing the genes for modification through transgenic or gene editing approaches. Predominantly N22 showed distinct and unique capability to reprogram its physiological and molecular machinery during prolonged heat stress at reproductive stage, suggesting that the dynamics in gene regulation is crucial to determine its heat tolerant ability. The study has larger implications in deploying genes for the development of heat tolerant rice cultivars through breeding, transgenic, and genome editing approaches.
ISSN:0721-7595
1435-8107
DOI:10.1007/s00344-020-10282-2