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Plant Physiol. 2018 Sep;178(1):163-173. doi: 10.1104/pp.18.00443. Epub 2018 Aug 1.

Long-Day Photoperiod Enhances Jasmonic Acid-Related Plant Defense.

Author information

1
Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura, Facultad de Agronomía, C1417DSE Buenos Aires, Argentina.
2
Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, C1405BWE Buenos Aires, Argentina.
3
Laboratorio de Fisiología Vegetal, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Rio Cuarto, X5804BY Cordoba, Argentina.
4
Institute of Synthetic Biology and CEPLAS, University of Düsseldorf, Duesseldorf D-40225, Germany.
5
Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Biología Molecular y Celular de Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2000 Rosario, Argentina.
6
Howard Hughes Medical Institute, Salk Institute for Biological Studies, La Jolla, California 92037.
7
Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-UPV, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain.
8
Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura, Facultad de Agronomía, C1417DSE Buenos Aires, Argentina casal@ifeva.edu.ar.

Abstract

Agricultural crops are exposed to a range of daylengths, which act as important environmental cues for the control of developmental processes such as flowering. To explore the additional effects of daylength on plant function, we investigated the transcriptome of Arabidopsis (Arabidopsis thaliana) plants grown under short days (SD) and transferred to long days (LD). Compared with that under SD, the LD transcriptome was enriched in genes involved in jasmonic acid-dependent systemic resistance. Many of these genes exhibited impaired expression induction under LD in the phytochrome A (phyA), cryptochrome 1 (cry1), and cry2 triple photoreceptor mutant. Compared with that under SD, LD enhanced plant resistance to the necrotrophic fungus Botrytis cinerea This response was reduced in the phyA cry1 cry2 triple mutant, in the constitutive photomorphogenic1 (cop1) mutant, in the myc2 mutant, and in mutants impaired in DELLA function. Plants grown under SD had an increased nuclear abundance of COP1 and decreased DELLA abundance, the latter of which was dependent on COP1. We conclude that growth under LD enhances plant defense by reducing COP1 activity and enhancing DELLA abundance and MYC2 expression.

Comment in

PMID:
30068539
PMCID:
PMC6130044
[Available on 2019-09-01]
DOI:
10.1104/pp.18.00443
[Indexed for MEDLINE]

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