Tasselseed5 overexpresses a wound-inducible enzyme, ZmCYP94B1, that affects jasmonate catabolism, sex determination, and plant architecture in maize
| Autor: | Abraham J.K. Koo, China Lunde, Sarah Hake, Samuel Leiboff, Athen Kimberlin |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
2. Zero hunger Regulation of gene expression 0303 health sciences Positional cloning Jasmonic acid Mutant Wild type Medicine (miscellaneous) Biology 01 natural sciences Phenotype Article General Biochemistry Genetics and Molecular Biology Cell biology 03 medical and health sciences chemistry.chemical_compound lcsh:Biology (General) chemistry Jasmonate General Agricultural and Biological Sciences lcsh:QH301-705.5 Gene 030304 developmental biology 010606 plant biology & botany |
| Zdroj: | Communications Biology, Vol 2, Iss 1, Pp 1-11 (2019) Communications Biology |
| ISSN: | 2399-3642 |
| DOI: | 10.1038/s42003-019-0354-1 |
| Popis: | Maize is monecious, with separate male and female inflorescences. Maize flowers are initially bisexual but achieve separate sexual identities through organ arrest. Loss-of-function mutants in the jasmonic acid (JA) pathway have only female flowers due to failure to abort silks in the tassel. Tasselseed5 (Ts5) shares this phenotype but is dominant. Positional cloning and transcriptomics of tassels identified an ectopically expressed gene in the CYP94B subfamily, Ts5 (ZmCYP94B1). CYP94B enzymes are wound inducible and inactivate bioactive jasmonoyl-L-isoleucine (JA-Ile). Consistent with this result, tassels and wounded leaves of Ts5 mutants displayed lower JA and JA-lle precursors and higher 12OH-JA-lle product than the wild type. Furthermore, many wounding and jasmonate pathway genes were differentially expressed in Ts5 tassels. We propose that the Ts5 phenotype results from the interruption of JA signaling during sexual differentiation via the upregulation of ZmCYP94B1 and that its proper expression maintains maize monoecy. China Lunde et al. used cloning, transcriptomics, and metabolomics to identify the Tasselseed5 (Ts5) gene in maize, and its role in the jasmonate metabolism. They find that the phenotype of the Ts5 mutants is the result of interrupted jasmonic acid signaling during sexual differentiation. |
| Databáze: | OpenAIRE |
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