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Mechanisms of lysigenous aerenchyma formation under abiotic stress

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Lysigenous aerenchyma is a gas space created by cortical cell death that enables efficient oxygen diffusion within plants and reduces the energy costs associated with root cells. Recent studies have demonstrated the benefits of aerenchyma formation under flooding, drought, and nutrient deficiency, although further studies will be necessary to understand the mechanisms involved.

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Acknowledgments

This work was supported by the Japan Science and Technology Agency PRESTO grants JPMJPR17Q8 to T.Y. and Grant-in-Aid for Transformative Research Areas (A) (MEXT KAKENHI grant JP20H05912) to M.N.

Declaration of interests

The authors declare no conflicts of interest.

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    Consequently, NS may regulate oxygen production (i.e., the oxygen source of ROL), and thus may affect the redox environment in CWs. From the perspective of morphogenesis, root aerenchyma can effectively supply oxygen from the aboveground to the root, ensuring normal life activities of the root, and radially releasing excess oxygen to the rhizosphere [12]. NS can increase or decrease plant root biomass and porosity to alter aerenchyma development [7,13].

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