Overexpression of the rice <i>Osmyb4</i> gene increases chilling and freezing tolerance of <i>Arabidopsis thaliana</i> plants
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No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
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- Teacher spread
- 0.176 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
The expression of the gene Osmyb4, detected at low level in rice (Oryza sativa) coleoptiles grown for 3 days at 29 degrees C, is strongly induced by treatments at 4 degrees C. At sublethal temperatures of 10 and 15 degrees C, its expression in rice seedlings is already evident, but this effect cannot be vicariated by other stresses or ABA treatment. We demonstrate by transient expression that Myb4 transactivates the PAL2, ScD9 SAD and COR15a cold-inducible promoters. The Osmyb4 function in vivo is demonstrated overexpressing its cDNA in Arabidopsis thaliana plants (ecotype Wassilewskija) under the control of the constitutive CaMV 35S promoter. Myb4 overexpressing plants show a significant increased cold and freezing tolerance, measured as membrane or Photosystem II (PSII) stability and as whole plant tolerance. Finally, in Osmyb4 transgenic plants, the expression of genes participating in different cold-induced pathways is affected, suggesting that Myb4 represents a master switch in cold tolerance.
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The record
- Venue
- The Plant Journal
- Topic
- Plant Stress Responses and Tolerance
- Field
- Agricultural and Biological Sciences
- Canadian institutions
- —
- Funders
- National Research Council CanadaUniversità degli Studi dell'Insubria
- Keywords
- Arabidopsis thalianaColeoptileOryza sativaBiologyTransgeneArabidopsisGenetically modified cropsGene expressionGenetically modified riceCell biologyEcotypeGenePhotosystem IIBotanyMutantGeneticsPhotosynthesis
- Has abstract in OpenAlex
- yes