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A microscopic scenario on recovery mechanisms under waterlogging and submergence stress in rice

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Abstract

Main conclusion

Adaptive traits in rice responding to flooding, a compound stress, are associated with morpho-anatomical and physiological changes which are regulated at the genetic level. Therefore, understanding submergence stress tolerance in rice will help development of adapted cultivars that can help mitigate agricultural losses.

Abstract

Rice is an important dietary component of daily human consumption and is cultivated as a staple crop worldwide. Flooding is a compound stress which imposes significant financial losses to farmers. Flood-affected rainfed rice ecosystems led to the development of various adaptive traits in different cultivars for their optimal growth and survival. Some cultivars can tolerate hypoxia by temporarily arresting elongation and conserving their energy sources, which they utilize to regrow after the stress conditions subside. However, few other cultivars rapidly elongate to escape hypoxia using carbohydrate resources. These contrasting characters are regulated at the genetic level through different quantitative trait loci that contain ERF transcription factors (TFs), Submergence and Snorkels. TFs can simultaneously activate the transcription of various genes involved in stress and development responses. These TFs are of prime importance because the introgressed and near-isogenic lines showed promising results with increased submergence tolerance without affecting yield or quality. However, the entire landscape of submergence tolerance is not entirely depicted, and further exploration in the field is necessary to understand the mechanism in rice completely. Therefore, this review will highlight the significant adaptive traits observed in flooded rice varieties and how they are regulated mechanistically.

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Abbreviations

AR:

Adventitious root

ERF:

Ethylene-response factor

LOQS:

Low-oxygen quiescence syndrome

LOES:

Low-oxygen escape syndrome

QTL:

Quantitative trait loci

ROL:

Radial oxygen loss

SUB1:

Submergence1

TF:

Transcription factor

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Authors

Contributions

UJP and SJ contributed to the draft of this manuscript. BL, CL and PKS contributed to, critically reviewed and edited the manuscript. All the authors have read and approved the final version of the manuscript.

Corresponding author

Correspondence to Bendangchuchang Longchar.

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The authors declare that they do not have any competing interests.

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Communicated by Dorothea Bartels.

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Phukan, U.J., Jindal, S., Laldinsangi, C. et al. A microscopic scenario on recovery mechanisms under waterlogging and submergence stress in rice. Planta 259, 9 (2024). https://doi.org/10.1007/s00425-023-04285-y

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  • DOI: https://doi.org/10.1007/s00425-023-04285-y

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