ATHB2 is a negative regulator of germination in Arabidopsis thaliana seeds
| Autor: | Javier Francisco Botto, Ida Ruberti, Rocío Soledad Tognacca, Giorgio Morelli, Monica Carabelli |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Molecular biology Science Arabidopsis Germination Genes Plant 01 natural sciences Article 03 medical and health sciences chemistry.chemical_compound Auxin Gene Expression Regulation Plant Botany Arabidopsis thaliana Author Correction Transcription factor Abscisic acid chemistry.chemical_classification Multidisciplinary biology Arabidopsis Proteins fungi ARABIDOPSIS THALIANA food and beverages biology.organism_classification 030104 developmental biology chemistry Seeds Medicine Imbibition Gibberellin Plant sciences 010606 plant biology & botany GERMINATION Abscisic Acid Signal Transduction Transcription Factors |
| Zdroj: | Scientific Reports Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) Vol.11 art.9688,13p. FAUBA Digital (UBA-FAUBA) Universidad de Buenos Aires. Facultad de Agronomía instacron:UBA-FAUBA |
| ISSN: | 2045-2322 |
| Popis: | Tognacca, Rocío Soledad. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Tognacca, Rocío Soledad. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Tognacca, Rocío Soledad. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE). Buenos Aires, Argentina. Tognacca, Rocío Soledad. CONICET – Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE). Buenos Aires, Argentina. Carabelli, Mónica. National Research Council. Institute of Molecular Biology and Pathology. Rome, Italy. Morelli, Giorgio. Council for Agricultural Research and Economics (CREA). Research Centre for Genomics and Bioinformatics. Rome, Italy. Ruberti, Ida. National Research Council. Institute of Molecular Biology and Pathology. Rome, Italy. Botto, Javier Francisco. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Botto, Javier Francisco. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. The germination timing of seeds is of the utmost adaptive importance for plant populations. Light is one of the best characterized factors promoting seed germination in several species. The germination is also fnely regulated by changes in hormones levels, mainly those of gibberellin (GA) and abscisic \nacid (ABA). Here, we performed physiological, pharmacological, and molecular analyses to uncover the role of ATHB2, an HD-ZIP II transcription factor, in germination of Arabidopsis seeds. Our study demonstrated that ATHB2 is a negative regulator and sustains the expression of transcription factors to block germination promoted by light. Besides, we found that ATHB2 increases ABA sensitivity. Moreover, ABA and auxin content in athb2-2 mutant is higher than wild-type in dry seeds, but the diferences disappeared during the imbibition in darkness and the frst hours of exposition to light, respectively. Some ABA and light transcription factors are up-regulated by ATHB2, such as ABI5, ABI3, XERICO, SOMNUS and PIL5/PIF1. In opposition, PIN7, an auxin transport, is down-regulated. The role of ATHB2 as a repressor of germination induced by light afecting the gemination timing, could have diferential efects on the establishment of seedlings altering the competitiveness between crops and weeds in the feld. il., grafs. |
| Databáze: | OpenAIRE |
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