HD-Zip proteins modify floral structures for self-pollination in tomato.

Autor: Wu M; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Bian X; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Huang B; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Du Y; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.; College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Hu S; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Wang Y; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.; College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Shen J; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Wu S; College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2024 Apr 05; Vol. 384 (6691), pp. 124-130. Date of Electronic Publication: 2024 Apr 04.
DOI: 10.1126/science.adl1982
Abstrakt: Cleistogamy is a type of self-pollination that relies on the formation of a stigma-enclosing floral structure. We identify three homeodomain-leucine zipper IV (HD-Zip IV) genes that coordinately promote the formation of interlocking trichomes at the anther margin to unite neighboring anthers, generating a closed anther cone and cleistogamy (flower morphology necessitating strict self-pollination). These HD-Zip IV genes also control style length by regulating the transition from cell division to endoreduplication. The expression of these HD-Zip IV genes and their downstream gene, Style 2.1 , was sequentially modified to shape the cleistogamy morphology during tomato evolution and domestication. Our results provide insights into the molecular basis of cleistogamy in modern tomato and suggest targets for improving fruit set and preventing pollen contamination in genetically modified crops.
Databáze: MEDLINE
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