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090			_aB-21046
245	1	0	_aTemperature regulation of auxin-related gene expression and its implications for plant growth
490	0		_vJournal of Experimental Botany, 74(22), p.7015-7033, 2023
520	3		_aTwenty-five years ago, a seminal paper demonstrated that warm temperatures increase auxin levels to promote hypocotyl growth in Arabidopsis thaliana. Here we highlight recent advances in auxin-mediated thermomorphogenesis and identify unanswered questions. In the warmth, PHYTOCHROME INTERACTING FACTOR 4 (PIF4)and PIF7 bind the YUCCA8 gene promoter and, in concert with histone modifications, enhance its expression to increase auxin synthesis in the cotyledons. Once transported to the hypocotyl, auxin promotes cell elongation. The meta-analysis of expression of auxin-related genes in seedlings exposed to temperatures ranging from cold to hot shows complex patterns of response. Changes in auxin only partially account for these responses. The expression of many SMALL AUXIN UP RNA (SAUR)genes reaches a maximum in the warmth, decreasing towards both temperature extremes in correlation with the rate of hypocotyl growth. Warm temperatures enhance primary root growth, the response requires auxin, and the hormone levels increase in the root tip but the impacts on cell division and cell expansion are not clear. A deeper understanding of auxin-mediated temperature control of plant architecture is necessary to face the challenge of global warming.
650	1	4	_aAUXIN
650	1	4	_aHYPOCOTYL GROWTH
650	1	4	_aLEAF HYPONASTY
650	1	4	_aMETA-ANALYSIS
650	1	4	_aROOT GROWTH
650	1	4	_aTEMPERATURE AND GENE EXPRESSION
650	1	4	_aTHERMOMORPHOGENESIS
700	1	2	_aBianchimano, L.
700	1	2	_aDe Luca, M. B.
700	1	2	_aBorniego, M. B.
700	1	2	_aIglesias, M. J.
700	1	2	_aCasal, J. J.
856	4	0	_uhttps://drive.google.com/open?id=1ai1gxS2dyfpemqet-Lyii08BSKpvrD-h&usp=drive_copy _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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