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VOL. 11, ISSUE 2 (2026)
Mechanisms of Tolerance to Acidic Soil Stress in Joha Rice Cultivars
Authors
Sharmistha Sarma Kalita, Bhaben Tanti
Abstract
Soil acidity is a major abiotic stressor that
significantly limits rice growth and productivity, particularly in acid-prone
regions where low soil pH, nutrient imbalances, and aluminium toxicity
adversely affect plant development and performance. This review summarises the
morpho-physiological, biochemical, and molecular responses underlying acidic
soil stress tolerance in rice, with particular emphasis on Joha rice cultivars.
Acidic stress impairs root development, photosynthetic efficiency, biomass
accumulation, and membrane stability through oxidative damage, ion toxicity,
and metabolic disruption. In contrast, tolerant cultivars exhibit enhanced
growth performance, robust antioxidant defence systems, greater accumulation of
osmoprotectants, and efficient activation of stress-responsive signalling
pathways compared with sensitive cultivars. Key tolerance mechanisms include
reactive oxygen species detoxification, maintenance of cellular pH homeostasis,
aluminium exclusion and detoxification, and the activation of signalling
networks mediated by Ca²⁺, abscisic acid (ABA), mitogen-activated protein
kinases (MAPKs), and OsART1-regulated transcriptional responses. A
comprehensive understanding of these adaptive mechanisms provides valuable
insights for the identification, screening, and breeding of acid-tolerant rice
cultivars, thereby contributing to sustainable rice production in acid-affected
soils.
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Pages:358-362
How to cite this article:
Sharmistha Sarma Kalita, Bhaben Tanti "Mechanisms of Tolerance to Acidic Soil Stress in Joha Rice Cultivars". International Journal of Botany Studies, Vol 11, Issue 2, 2026, Pages 358-362
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