کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4570579 1332050 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
NPY Genes Play an Essential Role in Root Gravitropic Responses in Arabidopsis
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
NPY Genes Play an Essential Role in Root Gravitropic Responses in Arabidopsis
چکیده انگلیسی

ABSTRACTPlants can sense the direction of gravity and orient their growth to ensure that roots are anchored in soil and that shoots grow upward. Gravitropism has been studied extensively using Arabidopsis genetics, but the exact mechanisms for gravitropism are not fully understood. Here, we demonstrate that five NPY genes play a key role in Arabidopsis root gravitropism. NPY genes were previously identified as regulators of auxin-mediated organogenesis in a genetic pathway with the AGC kinases PID, PID2, WAG1, and WAG2. We show that all five NPY genes are highly expressed in primary root tips. The single npy mutants do not display obvious gravitropism defects, but the npy1 npy2 npy3 npy4 npy5 quintuple mutants show dramatic gravitropic phenotypes. Systematic analysis of all the npy double, triple, and quadruple combinations demonstrates that the five NPY genes all contribute to gravitropism. Our work indicates that gravitropism, phototropism, and organogenesis use analogous mechanisms in which at least one AGC kinase, one NPH3/NPY gene, and one ARF are required.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 4, Issue 1, January 2011, Pages 171–179
نویسندگان
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