Upregulation of a KN1 homolog by transposon insertion promotes leafy head development in lettuce

作者：Changchun Yu, Chenghuan Yan, Yuling Liu, Yali Liu, Yue Jia, Dean Lavelle, Guanghui An, Weiyi Zhang, Lei Zhang, Rongkui Han, Robert M. Larkin, Jiongjiong Chen, Richard W. Michelmore, Hanhui Kuang · 发表于：Proceedings of the National Academy of Sciences · 年份：2020 · DOI：10.1073/pnas.2019698117 · 被引用次数：69 · 研究领域：Chromosomal and Genetic Variations、Plant Molecular Biology Research、Plant nutrient uptake and metabolism

Significance Heading, which facilitates harvest and contributes to taste and shelf life, is an important trait in some vegetable crops. However, litter is known about its genetic and molecular mechanism. Here, we report the genetic cloning of a key regulator ( LsKN1 ) of heading in lettuce, which is homologous to the knotted 1 ( KN1 ) gene in maize. The LsKN1 gene is upregulated by the insertion of a CACTA-like transposon. Its enhanced expression suppressed the LsAS1 gene and consequently altered leaf polarity and led to a heading phenotype.