It appears you don't have support to open PDFs in this web browser. To view this file, Open with your PDF reader
Abstract
Leaf angle is an important agronomic trait affecting photosynthesis efficiency and crop yield. Although the mechanisms involved in the leaf angle control are intensively studied in monocots, factors contribute to the leaf angle in dicots are largely unknown. In this article, we explored the physiological roles of an Arabidopsis glucosyltransferase, UGT74D1, which have been proved to be indole-3-acetic acid (IAA) glucosyltransferase in vitro. We found that UGT74D1 possessed the enzymatic activity toward IAA glucosylation in vivo and its expression was induced by auxins. The ectopically expressed UGT74D1 obviously reduced the leaf angle with an altered IAA level, auxin distribution and cell size in leaf tissues. The expression of several key genes involved in the leaf shaping and leaf positioning, including PHYTOCHROME KINASE SUBSTRATE (PKS) genes and TEOSINTE BRANCHED1, CYCLOIDEA, and PCF (TCP) genes, were dramatically changed by ectopic expression of UGT74D1. In addition, clear transcription changes of YUCCA genes and other auxin related genes can be observed in overexpression lines. Taken together, our data indicate that glucosyltransferase UGT74D1 could affect leaf positioning through modulating auxin homeostasis and regulating transcription of PKS and TCP genes, suggesting a potential new role of UGT74D1 in regulation of leaf angle in dicot Arabidopsis.
You have requested "on-the-fly" machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Show full disclaimer
Neither ProQuest nor its licensors make any representations or warranties with respect to the translations. The translations are automatically generated "AS IS" and "AS AVAILABLE" and are not retained in our systems. PROQUEST AND ITS LICENSORS SPECIFICALLY DISCLAIM ANY AND ALL EXPRESS OR IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES FOR AVAILABILITY, ACCURACY, TIMELINESS, COMPLETENESS, NON-INFRINGMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Your use of the translations is subject to all use restrictions contained in your Electronic Products License Agreement and by using the translation functionality you agree to forgo any and all claims against ProQuest or its licensors for your use of the translation functionality and any output derived there from. Hide full disclaimer
Details
1 Qingdao Agricultural University, College of Life Sciences, Qingdao, China (GRID:grid.412608.9) (ISNI:0000 0000 9526 6338); Shandong University, The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, College of Life Sciences, Qingdao, China (GRID:grid.27255.37) (ISNI:0000 0004 1761 1174)
2 Shandong University, The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, College of Life Sciences, Qingdao, China (GRID:grid.27255.37) (ISNI:0000 0004 1761 1174)
3 Linyi University, School of Pharmacy, College of Pharmacy, Linyi, China (GRID:grid.410747.1) (ISNI:0000 0004 1763 3680); Shandong University, The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, College of Life Sciences, Qingdao, China (GRID:grid.27255.37) (ISNI:0000 0004 1761 1174)