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Plant-herbivore interactions and defense responses mediated by the jasmonates.

Plants have very effective mechanisms to defend themselves from phytophagous insects and pathogenic microorganisms. We are interested in understanding the ecological signals that modulate the expression of these defenses.

Plant defenses are frequently based on the accumulation toxic secondary compounds, and their expression is orchestrated by a number of defense-related hormones. The jasmonates (JA) are a group of lipid regulators that play a key role in activating plant defenses against chewing insects and certain types of plant pathogens. JA-inducible defenses impose an energy cost on the plant; therefore, the expression of these defenses may compromise the ability of the plant to grow and compete with other plants. This tradeoff is known as "the dilemma of plants" (i.e., to grow or defend). We investigate the mechanisms that control the expression of JA-inducible plant defenses in response to light signals that plants use to "measure" the risk of competition.

Special Issue on Plant Interactions with other Organisms, Austin & Ballaré (2014)
I. Cerrudo, M. E. Caliri-Ortiz, M. M. Keller, M. E. Degano, P. V. Demkura, C. L. Ballaré
Exploring growth-defense tradeoffs in Arabidopsis. Phytochrome B inactivation requires JAZ10 to suppress plant immunity but not to trigger shade avoidance responses
Plant Cell And Environment, 40: 635-644.
C. L. Ballaré and R. Pierik
The shade avoidance syndrome: Multiple signals and ecological consequences
Plant, Cell and Environment, accepted
D. A. Bastias, M. A. Martínez-Ghersa, C. L. Ballaré, P. E. Gundel
Epichloe Fungal Endophytes and Plant Defenses: Not Just Alkaloids
Trends in Plant Science
C. L. Ballaré
Phytochrome Responses: Think Globally, Act Locally
Trends in Plant Science
A. T. Austin, M. S. Méndez and C. L. Ballaré
Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
Proceedings of the National Academy of Sciences, 113: 4392-4397
L. E. Cortés, B. T. Weldegergis, H. E. Boccalandro, M. Dicke, and C. L. Ballaré
Trading direct for indirect defense? Phytochrome B inactivation in tomato attenuates direct anti-herbivore defenses whilst enhancing volatile-mediated attraction of predators
New Phytologist, 212: 1057-1071
C. A. Mazza, C. L. Ballaré
Photoreceptors UVR8 and phytochrome B cooperate to optimize plant growth and defense in patchy canopies
New Phytologist, 207: 4-9
C. L. Ballaré
Light Regulation of Plant Defense
Annual Review of Plant Biology 65, 335-363
J. E. Moreno, C. L. Ballaré
Phytochorme regulation of plant immunity in vegetation canopies
Journal of Chemical Ecology, 40: 848-857
M. D. Cargnel, P. V. Demkura, C. L. Ballaré
Linking phytochrome to plant immunity: low red:far-red ratios increase Arabidopsis susceptibility to Botrytis cinerea by reducing the biosynthesis of indolic glucosinolates and camalexin
New Phytologist, 204: 342-345
R. Pierik, C. L. Ballaré and M. Dicke
Ecology of plant volatiles: taking a plant community perspective
Plant, Cell and Environment, 37: 1845-1853
C. A. Mazza, P. I. Giménez, A. G. Kantolic and C. L. Ballaré
Beneficial effects of solar UV-B radiation on soybean yield mediated by reduced insect herbivory under field conditions
Physiologia Plantarum 147, 307-315.
M. M. Izaguirre, C.A. Mazza, M. S. Astigueta, A. M. Ciarla and Ballaré C. L.
No time for candy: passionfruit (Passiflora edulis) plants down-regulate damage-induced extra floral nectar production in response to light signals of competition
Oecologia 173, 213-221
C. L. Ballaré, C. A. Mazza, A. T. Austin and R. Pierik
Canopy light and plant health
Plant Physiology 160, 145-155 (commissioned Update)
I. Cerrudo, M. M. Keller, M. D. Cargnel, P. V. Demkura, M. de Wit, M. S. Patitucci, R. Pierik, C. M. J. Pieterse and C. L. Ballaré
Low Red:Far-Red ratios reduce Arabidopsis resistance to Botrytis cinerea and jasmonate responses via a COI1-JAZ10-dependent, salicylic acid-independent mechanism
Plant Physiology 158, 2042-2052.
P. V. Demkura and C. L. Ballaré
UVR8 mediates UV-B-induced Arabidopsis defense responses against Botrytis cinerea by controlling sinapate accumulation
Molecular Plant 5, 642-652.
C. L. Ballaré
Jasmonate-induced defenses: a tale of intelligence, collaborators and rascals
Trends in Plant Science 16, 249-257.
C. A. Mazza, M. M. Izaguirre, J. Curiale and C. L. Ballaré
A look into the invisible: ultraviolet-B sensitivity in an insect (Caliothrips phaseoli) revealed through a behavioural action spectrum
Proceedings of the Royal Society B-Biological Sciences 277, 367-373.
P. Balint-Kurti, S. J. Simmons, J. E. Blum, C. L. Ballaré and A. E. Stapleton
Maize leaf epiphytic bacteria diversity patterns are genetically correlated with resistance to fungal pathogen infection
Molecular Plant-Microbe Interactions 23, 473-484.
P. V. Demkura, G. Abdala, I. T. Baldwin and C. L. Ballaré
Jasmonate-dependent and -independent pathways mediate specific effects of solar ultraviolet-B radiation on leaf phenolics and antiherbivore defense
Plant Physiology 152, 1084-1095.
C. L. Ballaré
Illuminated behaviour: phytochrome as a key regulator of light foraging and plant anti-herbivore defence
Plant Cell and Environment 32, 713-725.
J. E. Moreno, Y. Tao, J. Chory and C. L. Ballaré
Ecological modulation of plant defense via phytochrome control of jasmonate sensitivity
Proceedings of the National Academy of Sciences of the United States of America 106, 4935-4940.
M. M. Izaguirre, C. A. Mazza, A. Svatos, I. T. Baldwin and C. L. Ballaré
Solar ultraviolet-B radiation and insect herbivory trigger partially overlapping phenolic responses in Nicotiana attenuata and Nicotiana longiflora
Annals of Botany 99, 103-109.
M. M. Izaguirre, C. A. Mazza, M. Biondini, I. T. Baldwin and C. L. Ballaré
Remote sensing of future competitors: impacts on plant defenses
Proceedings of the National Academy of Sciences of the United States of America 103, 7170-7174.