Light signals generated by vegetation shade facilitate acclimation to low light in shade-avoider plants

Autor: Sandi Paulišić, Manuel Rodríguez-Concepción, Wenting Qin, Luca Morelli, Irma Roig-Villanova, Igor Florez-Sarasa, Jaime F. Martínez-García, Ariadna Iglesias-Sanchez
Přispěvatelé: Universitat Politècnica de Catalunya. Departament d'Enginyeria Agroalimentària i Biotecnologia, Fundación 'la Caixa', China Scholarship Council, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Generalitat de Catalunya, Ministerio de Economía y Competitividad (España), Producció Vegetal, Genòmica i Biotecnologia
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
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Plant Physiol
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Digital.CSIC. Repositorio Institucional del CSIC
Dipòsit Digital de Documents de la UAB
Universitat Autònoma de Barcelona
IRTA Pubpro. Open Digital Archive
Institut de Recerca i Tecnologia Agroalimentàries (IRTA)
Popis: When growing in search for light, plants can experience continuous or occasional shading by other plants. Plant proximity causes a decrease in the ratio of R to far-red light (low R:FR) due to the preferential absorbance of R light and reflection of FR light by photosynthetic tissues of neighboring plants. This signal is often perceived before actual shading causes a reduction in photosynthetically active radiation (low PAR). Here, we investigated how several Brassicaceae species from different habitats respond to low R:FR and low PAR in terms of elongation, photosynthesis, and photoacclimation. Shade-tolerant plants such as hairy bittercress (Cardamine hirsuta) displayed a good adaptation to low PAR but a poor or null response to low R:FR exposure. In contrast, shade-avoider species, such as Arabidopsis (Arabidopsis thaliana), showed a weak photosynthetic performance under low PAR but they strongly elongated when exposed to low R:FR. These responses could be genetically uncoupled. Most interestingly, exposure to low R:FR of shade-avoider (but not shade-tolerant) plants improved their photoacclimation to low PAR by triggering changes in photosynthesis-related gene expression, pigment accumulation, and chloroplast ultrastructure. These results indicate that low R:FR signaling unleashes molecular, metabolic, and developmental responses that allow shade-avoider plants (including most crops) to adjust their photosynthetic capacity in anticipation of eventual shading by nearby plants.
L.M. received a predoctoral fellowships from La Caixa Foundation (INPhINIT fellowship LCF/BQ/IN18/11660004). W.Q. is a recipient of a predoctoral Chinese Scholarship Council (CSC) fellowship. A.I.-S. is supported by a predoctoral fellowship from MICINN (PRE2018-083610). I.F.-S. has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 753301. Our research is supported by grants from MICINN-FEDER (BIO2017-85316-R, and BIO2017-84041-P) and AGAUR (2017-SGR1211, 2017-SGR710 and Xarba) to J.F.M.-G. and M.R.-C. We also acknowledge the support of the MINECO for the “Centro de Excelencia Severo Ochoa 2016-2019” award SEV-2015-0533 and by the CERCA Programme/Generalitat de Catalunya.
Databáze: OpenAIRE
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