期刊
DEVELOPMENTAL BIOLOGY
卷 346, 期 2, 页码 181-195出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ydbio.2010.07.016
关键词
NPA; Replum; Carpel margin meristem; TAA1; PHABULOSA; Homeodomain-leucine zipper
资金
- National Science Foundation [IOS 0821896]
- National Research Initiative of the U.S. Department of Agriculture [2006-03378]
- U.S. Department of Agriculture, Agricultural Research Service [NC06759]
In flowering plants the gynoecium is the female reproductive structure and the site of oogenesis, fertilization, and maturation of the embryo and the seed. Proper development of the gynoecium requires that the early gynoecial primordium be partitioned into distinct spatial domains with divergent fates. Regulated transport of the phytohormone auxin previously has been shown to play a role in the Patterning of spatial domains along the apical-basal axis of the gynoecium. Here we establish a role for auxin transport in patterning along the medio-lateral axis of the gynoecial ovary. We demonstrate that auxin transport is required for the development of the medial ovary domain that contains the carpel margin meristem, a vital female reproductive structure. Disruptions in auxin transport enhance the medial domain defects observed in aintegumenta and revoluta mutant genotypes. AINTEGUMENTA and REVOLUTA are likely to function in parallel and partially overlapping pathways required for medial domain development. Our data indicate that different ovary domains are differentially sensitive to the reduction of polar auxin transport and the loss of AINTEGUMENTA and REVOLUTA activity. We suggest that an auxin-mediated positional cue is important for the differential specification of the medial and lateral ovary domains. (C) 2010 Elsevier Inc. All rights reserved.
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