ArticleFrontiers in plant science2026
Maintaining genetic stability in sweet potato: epigenetic insights into propagation and drought tolerance.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sweetpotato is propagated vegetatively via traditional vine cutting or tissue culture using node or meristematic tissues, yet phenotypic variations among the plants are observed irrespective of the propagation method due to environmental interactions leading to mutations and/or epigenetic modifications. Methylation-mediated epigenetic modification refers to the addition of methyl groups to DNA, primarily at cytosine bases, which regulates gene expression without altering the DNA sequence. The present study focused on understanding how various propagation methods and environmental stressors (drought) affect DNA methylation patterns and epigenetic stability in commercial varieties and half-sib progenies using bisulfite sequencing. This study revealed genotype-specific DNA methylation responses to tissue culture and drought stress in sweetpotato, reflecting genotype-dependent epigenetic plasticity. Statistical analyses revealed that methylation patterns remained largely stable during tissue culture, with only minor, genotype-specific fluctuations across Meristem initiated and conventional nodal cultures. In contrast, drought stress induced unpredictable, variety-dependent methylation remodeling, reflecting active epigenetic reprogramming. Prolonged tissue culture resulted in DNA methylation enhancement, most likely due to cumulative
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