A drought stress-induced MYB transcription factor regulates pavement cell shape in leaves of European aspen (Populus tremula)Vise andre og tillknytning
2026 (engelsk)Inngår i: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 251, nr 5, s. 2688-2705Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
- Leaf pavement cells of many plant species develop jigsaw puzzle-like shapes in which neighboring cells interdigitate, providing an ideal model for the study of cell shape regulation. Such shapes are likely to reduce tissue-wide mechanical stress, which is influenced by environmental conditions, such as drought stress.
- We analyzed pavement cell shape complexity in a natural population of European aspen (Populus tremula) genotypes and used a genome-wide association study (GWAS) to identify a candidate gene in cell shape regulation, Potra2n8c18226, encoding the transcription factor MYB305a. We subsequently validated a role for MYB305a in regulating aspen leaf pavement cell shape.
- We then demonstrated that drought stress strongly induces MYB305a promoter expression in these cells and provided evidence that MYB305a plays a role in regulating pavement cell shape in response to drought. Finally, we observed correlations of pavement cell shape complexity with water-use efficiency and average precipitation at the original sampling sites, in the natural aspen population.
- Taken together, our results suggest climatic variables affect shape complexity of pavement cells in aspen leaf and provide a foundation for future mechanistic studies on this process, by implicating the involvement of the transcription factor MY305a.
sted, utgiver, år, opplag, sider
John Wiley & Sons, 2026. Vol. 251, nr 5, s. 2688-2705
Emneord [en]
cell shape, drought, European aspen (Populus tremula), GWAS, leaf pavement cells
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-256747DOI: 10.1111/nph.71399ISI: 001810955300001PubMedID: 42402693Scopus ID: 2-s2.0-105043728469OAI: oai:DiVA.org:umu-256747DiVA, id: diva2:2087110
Forskningsfinansiär
Swedish Research Council, VR-2020-03420The Kempe Foundations, JCK-1732The Kempe Foundations, JCK-1912Knut and Alice Wallenberg FoundationVinnovaEU, European Research Council, ERC-2024-SyG STARMORPH 1011668802026-07-172026-07-172026-09-09bibliografisk kontrollert