Trading direct for indirect defense? Phytochrome B inactivation in tomato attenuates direct anti-herbivore defenses whilst enhancing volatile-mediated attraction of predators

Autor: Carlos L. Ballaré, Marcel Dicke, Berhane T. Weldegergis, Leandro Emanuel Cortés, Hernán E. Boccalandro
Rok vydání: 2016
Předmět:
0106 biological sciences
0301 basic medicine
Physiology
tritrophic interaction
FR ratio [R]
Plant Science
01 natural sciences
chemistry.chemical_compound
Solanum lycopersicum
Gene Expression Regulation
Plant
Phytochrome B
Bioassay
INDIRECT DEFENSE
Jasmonate
Laboratory of Entomology
media_common
Methyl jasmonate
TRITROPHIC INTERACTION
biology
Phytochrome
food and beverages
Discriminant Analysis
Trichomes
PHYTOCHROME
PE&RC
Attraction
defense
Lepidoptera
TOMATO (SOLANUM LYCOPERSICUM)
tomato (Solanum lycopersicum)
CIENCIAS NATURALES Y EXACTAS
DEFENSE
media_common.quotation_subject
Otras Ciencias Biológicas
Cyclopentanes
FR RATIO [R ]
volatile
Competition (biology)
Ciencias Biológicas
03 medical and health sciences
R : FR ratio
Botany
Animals
Herbivory
Oxylipins
Least-Squares Analysis
phytochrome
Volatile Organic Compounds
fungi
JASMONATE
VOLATILE
biology.organism_classification
Laboratorium voor Entomologie
Trichome
jasmonate
Plant Leaves
030104 developmental biology
chemistry
Predatory Behavior
Solanum
EPS
indirect defense
010606 plant biology & botany
Zdroj: New Phytologist 212 (2016) 4
New Phytologist, 212(4), 1057-1071
ISSN: 1469-8137
0028-646X
Popis: Under conditions of competition for light, which lead to the inactivation of the photoreceptor phytochrome B (phyB), the growth of shade-intolerant plants is promoted and the accumulation of direct anti-herbivore defenses is down-regulated. Little is known about the effects of phyB on emissions of volatile organic compounds (VOCs), which play a major role as informational cues in indirect defense. We investigated the effects of phyB on direct and indirect defenses in tomato (Solanum lycopersicum) using two complementary approaches to inactivate phyB: illumination with a low red to far-red ratio, simulating competition, and mutation of the two PHYB genes present in the tomato genome. Inactivation of phyB resulted in low levels of constitutive defenses and down-regulation of direct defenses induced by methyl jasmonate (MeJA). Interestingly, phyB inactivation also had large effects on the blends of VOCs induced by MeJA. Moreover, in two-choice bioassays using MeJA-induced plants, the predatory mirid bug Macrolophus pygmaeus preferred VOCs from plants in which phyB was inactivated over VOCs from control plants. These results suggest that, in addition to repressing direct defense, phyB inactivation has consequences for VOC-mediated tritrophic interactions in canopies, presumably attracting predators to less defended plants, where they are likely to find more abundant prey. Fil: Cortés, Leandro Emanuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Weldegergis, Berhane T.. Wageningen University; Países Bajos Fil: Boccalandro, Hernan Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina Fil: Dicke, Marcel. Wageningen University; Países Bajos Fil: Ballare, Carlos Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; Argentina
Databáze: OpenAIRE
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