RESUMO
MAIN CONCLUSION: A powerful acquired thermotolerance response in potato was demonstrated and characterised in detail, showing the time course required for tolerance, the reversibility of the process and requirement for light. Potato is particularly vulnerable to increased temperature, considered to be the most important uncontrollable factor affecting growth and yield of this globally significant crop. Here, we describe an acquired thermotolerance response in potato, whereby treatment at a mildly elevated temperature primes the plant for more severe heat stress. We define the time course for acquiring thermotolerance and demonstrate that light is essential for the process. In all four commercial tetraploid cultivars that were tested, acquisition of thermotolerance by priming was required for tolerance at elevated temperature. Accessions from several wild-type species and diploid genotypes did not require priming for heat tolerance under the test conditions employed, suggesting that useful variation for this trait exists. Physiological, transcriptomic and metabolomic approaches were employed to elucidate potential mechanisms that underpin the acquisition of heat tolerance. This analysis indicated a role for cell wall modification, auxin and ethylene signalling, and chromatin remodelling in acclimatory priming resulting in reduced metabolic perturbation and delayed stress responses in acclimated plants following transfer to 40 °C.
Assuntos
Resposta ao Choque Térmico , Reguladores de Crescimento de Plantas/metabolismo , Proteínas de Plantas/metabolismo , Solanum tuberosum/fisiologia , Termotolerância , Parede Celular/metabolismo , Montagem e Desmontagem da Cromatina , Eletrólitos/metabolismo , Etilenos/metabolismo , Perfilação da Expressão Gênica , Genótipo , Proteínas de Choque Térmico/genética , Proteínas de Choque Térmico/metabolismo , Resposta ao Choque Térmico/genética , Resposta ao Choque Térmico/efeitos da radiação , Temperatura Alta , Ácidos Indolacéticos/metabolismo , Metabolômica , Oxirredução , Fenótipo , Proteínas de Plantas/genética , Transdução de Sinais/genética , Transdução de Sinais/efeitos da radiação , Solanum tuberosum/genética , Solanum tuberosum/efeitos da radiação , Termotolerância/genética , Termotolerância/efeitos da radiaçãoRESUMO
The article A reversible light- and genotype-dependent acquired thermotolerance response protects the potato plant from damage due to excessive temperature, written by Almudena Trapero-Mozos, Laurence J. M. Ducreux, Craita E. Bita, Wayne Morris, Cosima Wiese, Jenny A. Morris, Christy Paterson, Peter E. Hedley, Robert D. Hancock, and Mark Taylor, was originally published electronically on the publisher's internet portal (currently SpringerLink) on 8 March 2018 without open access. With the author(s)' decision to opt for Open Choice the copyright of the article changed on 30 April 2018 to © The Author(s) 2018 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/ ), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.The âoriginal âarticle âhas âbeen âcorrected.