Hormonal regulation of temperature-induced growth in Arabidopsis Export

@article{citeulike:5630099, abstract = {Successful plant survival depends upon the proper integration of information from the environment with endogenous cues to regulate growth and development. We have investigated the interplay between ambient temperature and hormone action during the regulation of hypocotyl elongation, and we have found that gibberellins (GAs) and auxin are quickly and independently recruited by temperature to modulate growth rate, whereas activity of brassinosteroids (BRs) seems to be required later on. Impairment of GA biosynthesis blocked the increased elongation caused at higher temperatures, but hypocotyls of pentuple DELLA knockout mutants still reduced their response to higher temperatures when BR synthesis or auxin polar transport were blocked. The expression of several key genes involved in the biosynthesis of GAs and auxin was regulated by temperature, which indirectly resulted in coherent variations in the levels of accumulation of nuclear GFP2013RGA (repressor of GA1) and in the activity of the DR5 reporter. DNA microarray and genetic analyses allowed the identification of the transcription factor PIF4 (phytochrome-interacting factor 4) as a major target in the promotion of growth at higher temperature. These results suggest that temperature regulates hypocotyl growth by individually impinging on several elements of a pre-existing network of signaling pathways involving auxin, BRs, GAs, and PIF4.}, address = {Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, N1432s, Norway,; Instituto de Biologa Molecular y Celular de Plantas (CSIC-UPV), Edificio E8, Campus Universitat Politecnica de Valencia, Av de los Naranjos sn, 46022-Valencia, Spain,; RIKEN Plant Science Center, Yokohama City, Kanagawa 230-0045, Japan; Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan}, author = {Stavang, Jon A. and Gallego-Bartolom\'{e}, Javier and G\'{o}mez, Mar\'{\i}a D. and Yoshida, Shigeo and Asami, Tadao and Olsen, Jorunn E. and Garc\'{\i}a-Mart\'{\i}nez, Jos\'{e} L. and Alabad\'{\i}, David and Bl\'{a}zquez, Miguel A.}, citeulike-article-id = {5630099}, citeulike-linkout-0 = {http://dx.doi.org/10.1111/j.1365-313X.2009.03983.x}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/122519509/ABSTRACT}, doi = {10.1111/j.1365-313X.2009.03983.x}, issn = {1365-313X}, journal = {The Plant Journal}, keywords = {della, ga1, hormone, pif4, temperature}, number = {9999}, posted-at = {2009-08-24 09:44:07}, priority = {2}, title = {Hormonal regulation of temperature-induced growth in Arabidopsis}, url = {http://dx.doi.org/10.1111/j.1365-313X.2009.03983.x}, volume = {9999}, year = {2009} }

TY - JOUR ID - citeulike:5630099 L3 - citeulike-article-id:5630099 N2 - Successful plant survival depends upon the proper integration of information from the environment with endogenous cues to regulate growth and development. We have investigated the interplay between ambient temperature and hormone action during the regulation of hypocotyl elongation, and we have found that gibberellins (GAs) and auxin are quickly and independently recruited by temperature to modulate growth rate, whereas activity of brassinosteroids (BRs) seems to be required later on. Impairment of GA biosynthesis blocked the increased elongation caused at higher temperatures, but hypocotyls of pentuple DELLA knockout mutants still reduced their response to higher temperatures when BR synthesis or auxin polar transport were blocked. The expression of several key genes involved in the biosynthesis of GAs and auxin was regulated by temperature, which indirectly resulted in coherent variations in the levels of accumulation of nuclear GFP2013RGA (repressor of GA1) and in the activity of the DR5 reporter. DNA microarray and genetic analyses allowed the identification of the transcription factor PIF4 (phytochrome-interacting factor 4) as a major target in the promotion of growth at higher temperature. These results suggest that temperature regulates hypocotyl growth by individually impinging on several elements of a pre-existing network of signaling pathways involving auxin, BRs, GAs, and PIF4. IS - 9999 JF - The Plant Journal SN - 1365-313X AD - Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, N1432s, Norway,; Instituto de Biologa Molecular y Celular de Plantas (CSIC-UPV), Edificio E8, Campus Universitat Politecnica de Valencia, Av de los Naranjos sn, 46022-Valencia, Spain,; RIKEN Plant Science Center, Yokohama City, Kanagawa 230-0045, Japan; Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan TI - Hormonal regulation of temperature-induced growth in Arabidopsis VL - 9999 KW - della KW - ga1 KW - hormone KW - pif4 KW - temperature AU - Stavang, Jon AU - Gallego-Bartolomé, Javier AU - Gómez, María AU - Yoshida, Shigeo AU - Asami, Tadao AU - Olsen, Jorunn AU - García-Martínez, José AU - Alabadí, David AU - Blázquez, Miguel PY - 2009/// UR - http://dx.doi.org/10.1111/j.1365-313X.2009.03983.x ER -