Solar ultraviolet-B radiation alters the attractiveness of Arabidopsis plants to diamondback moths (Plutella xylostella L.): impacts on oviposition and involvement of the jasmonic acid pathway

Caputo, Carla; Rutitzky, Mariana; Ballaré, Carlos L.

doi:10.1007/s00442-006-0422-3

Cited by 87 publications

(84 citation statements)

References 48 publications

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“…This effect is not pronounced at the seed stage and was not detectable in our experiments during a window during germination, hypocotyl elongation, and cotyledon expansion that occurred before the appearance of the first leaves. These observations are consistent with the fact that light quality can strongly affect plant-insect interactions (23).…”

Section: Insects and Isopod Crustaceans Can Prey On Arabidopsis Seed supporting

confidence: 79%

Detritivorous crustaceans become herbivores on jasmonate-deficient plants

Farmer

Dubugnon

2009

Proc. Natl. Acad. Sci. U.S.A.

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The jasmonate signal pathway is known to control defenses against herbivores, such as leaf eaters (folivores). Does the reach of the pathway extend to defense against other types of animal? Among the arthropods attracted to seed baits placed below flowering Arabidopsis thaliana plants are 2 largely nocturnal isopod crustaceans generally considered as detritivores: Porcellio scaber and Armadillidium vulgare. Parallel laboratory experiments identified the isopods as being capable of predation on intact plants. Isopod feeding was strongly facilitated in jasmonate-deficient Arabidopsis and rice plants. The feeding activity of isopods revealed potentially detritivore-sensitive, jasmonate-protected Achilles' heels in these architecturally different plants (petioles and inflorescence stems in Arabidopsis, and lower stem and mesocotyl in rice). The work addresses the question of what stops 2 detritivores from attacking living plants and provides evidence that it is, in part, the jasmonate signal pathway. Furthermore, senescent leaves from an Arabidopsis jasmonate mutant were consumed more rapidly than senescent wild-type leaves, suggesting that past activity of the jasmonate signal pathway in leaves may slow carbon recycling through detritivory.detritivory ͉ isopods ͉ jasmonic acid ͉ plant defense ͉ senescence H erbivory is one of the most important processes in the biosphere, whereby carbon fixed by plants is transferred to higher trophic levels (1, 2). In many cases the largest category of herbivores on the vegetative tissues of plants tends to be insects (3). Additionally, many organisms are known to prey on seeds or otherwise affect seed fate (4). However, herbivores are not the only organisms associated with plants, and only a proportion of the animals associated with plants eat living plant tissues. Another important category of organisms found associated with plants are the detritivores: feeders on dead and dying material (5). Detritivory of plant material is a second major environmental process releasing carbon from plants to higher trophic levels. Like herbivory, this is one of the truly large-scale processes in nature. Detritivores, generally considered apart from herbivores, may actively survey the plant and its vicinity looking for senescent, decaying, or otherwise compromised plant tissues. Furthermore, there is no clear division in nature between detritivory and herbivory, and many arthropods are omnivores feeding at more than one trophic level (6). It is possible that some detritivores, if given the opportunity, might be facultative herbivores. Indeed, it is conceivable that defense barriers against detritivores would be provided by the jasmonate signal pathway, because this pathway operates on the expression of hundreds of wound-inducible defense and survival genes (7) and underlies a major defense system against many herbivores (8).Through field observations we first identified arthropods potentially capable of devouring Arabidopsis seeds. These were early-stage juveniles of the nocturnal dermapteran (e...

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Section: Insects and Isopod Crustaceans Can Prey On Arabidopsis Seed supporting

confidence: 79%

Detritivorous crustaceans become herbivores on jasmonate-deficient plants

Farmer

Dubugnon

2009

Proc. Natl. Acad. Sci. U.S.A.

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“…Also as expected, npr1 and jar1 did not show an increase in HRF after MeSA or MeJA treatments, respectively, whereas jar1 responded with a relatively large increase in HRF in response to MeSA. Consistent with these data, jar1 plants were previously shown to be unable to establish a UV-B-induced protective response against herbivores (Caputo et al, 2006), suggesting a requirement for the jar1-encoded JA-amino acid conjugase in both response to pathogens and to abiotic stress-induced changes in HRF after exposure to UV light.…”

Section: Mesa and Meja Are Key Signaling Volatiles But Not The Only Osupporting

confidence: 73%

“…Moreover, UV-triggered changes in PR gene expression and activation of SA have been documented for several plant species (Green and Fluhr, 1995;Jenkins, 2009), and UV-induced transition to flowering has been found to be SA dependent (Martínez et al, 2004). Finally, UV exposure can activate defense mechanisms against insect herbivory in a JAdependent manner (Stratmann et al, 2000;Agrawal et al, 2003;Caputo et al, 2006;Foggo et al, 2007;Clarke et al, 2009;Demkura et al, 2010). All in all, these data suggest that UVinduced systemic recombination signal and SWS may share common signaling molecules.…”

Section: Online)mentioning

confidence: 74%

UV-C–Irradiated Arabidopsis and Tobacco Emit Volatiles That Trigger Genomic Instability in Neighboring Plants

et al. 2011

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We have previously shown that local exposure of plants to stress results in a systemic increase in genome instability. Here, we show that UV-C–irradiated plants produce a volatile signal that triggers an increase in genome instability in neighboring nonirradiated Arabidopsis thaliana plants. This volatile signal is interspecific, as UV-C–irradiated Arabidopsis plants transmit genome destabilization to naive tobacco (Nicotiana tabacum) plants and vice versa. We report that plants exposed to the volatile hormones methyl salicylate (MeSA) or methyl jasmonate (MeJA) exhibit a similar level of genome destabilization as UV-C–irradiated plants. We also found that irradiated Arabidopsis plants produce MeSA and MeJA. The analysis of mutants impaired in the synthesis and/or response to salicylic acid (SA) and/or jasmonic acid showed that at least one other volatile compound besides MeSA and MeJA can communicate interplant genome instability. The NONEXPRESSOR OF PATHOGENESIS-RELATED GENES1 (npr1) mutant, defective in SA signaling, is impaired in both the production and the perception of the volatile signals, demonstrating a key role for NPR1 as a central regulator of genome stability. Finally, various forms of stress resulting in the formation of necrotic lesions also generate a volatile signal that leads to genomic instability.

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“…The strongest evidence for a role of JA in some defense responses triggered by natural doses of UV-B radiation comes from studies using mutants or transgenic lines impaired in JA biosynthesis or signaling. Disruption of the JA signaling pathway in Arabidopsis (Caputo et al, 2006) and Nicotiana attenuata (Demkura et al, 2010) was shown to eliminate the effect of solar UV-B inducing plant protection against herbivorous insects. In contrast, a recent case was reported in which a positive effect of UV-B radiation on plant resistance against pathogens was conserved in JA-response mutants , suggesting that UV-B radiation likely influences plant defense via multiple pathways.…”

Section: Uv-b and Uvr8mentioning

confidence: 99%