articleGenes & DevelopmentJul 1, 2006DIAMOND OA

Auxin biosynthesis by the YUCCA flavin monooxygenases controls the formation of floral organs and vascular tissues in Arabidopsis

YCYoufa ChengXDXinhua DaiYZYunde Zhao

University of California San Diego

PubMed
Indexed incrossrefpubmed

Abstract

Auxin biosynthesis in plants has remained obscure although auxin has been known for decades as a key regulator for plant growth and development. Here we define the YUC gene family and show unequivocally that four of the 11 predicted YUC flavin monooxygenases (YUC1, YUC2, YUC4, and YUC6) play essential roles in auxin biosynthesis and plant development. The YUC genes are mainly expressed in meristems, young primordia, vascular tissues, and reproductive organs. Overexpression of each YUC gene leads to auxin overproduction, whereas disruption of a single YUC gene causes no obvious developmental defects. However, yuc1yuc4, yuc2yuc6, all of the triple and quadruple mutants of the four YUC genes, display severe…

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Topics & keywords

Topics
Keywords
  • Auxin
  • Biology
  • Yucca
  • Primordium
  • Meristem
  • Arabidopsis
  • Vascular tissue
  • Gene
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