The circadian clock contributes to diurnal patterns of plant indirect defense in nature

Joo, Youngsung; Goldberg, Jay K; Chrétien, Lucille T. S.; Kim, Sang‐Gyu; Baldwin, Ian T.; Schuman, Meredith C.

doi:10.1111/jipb.12725

Cited by 11 publications

(12 citation statements)

References 16 publications

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“…Since this assay was conducted in a climate-controlled room, and illumination was uniformly and continuously supplied during the whole assay duration, we hypothesize that the parasitoids’ circadian rhythm imposed these effects, which is worthy of further investigation. The prominent impact of circadian rhythm on chemical communication interaction within a tritrophic context has been noted ( Joo et al 2019 ), but associated information on the tritrophic levels of aphids-aphid parasitoids-plants is still lacking.…”

Section: Discussionmentioning

confidence: 99%

Host-Seeking Behavior of Aphidius gifuensis (Hymenoptera: Braconidae) Modulated by Chemical Cues Within a Tritrophic Context

Song

Liu

Cai

et al. 2021

Journal of Insect Science

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Aphidius gifuensis Ashmaed is a generalist endoparasitoid that parasitizes a variety of aphid species. In China, it is widely used as a biological control agent to protect vegetables and tobaccos in open fields; control efficiency is largely dependent on its host-seeking ability. In this study, a six-choice olfactometer was used to investigate the olfactory responses of A. gifuensis to tobacco plants that had suffered damage (either varying degrees of mechanical damage or from aphid-feeding at different time intervals) and tobacco volatiles with different dosages. Furthermore, the regularity of A. gifuensis females’ response toward an aphid/tobacco complex was monitored using a Y-tube olfactometer. Our findings suggest that tobacco plants are significantly attractive to A. gifuensis after they have been punctured with 50 holes, or housed with Myzus persicae (Sulzer) at a density of 400 aphids, except at an infestation time of 12 h. Moreover, aphid density had a more significant effect on the response than the time interval since aphid application. Aphidius gifuensis was found to be active during the daytime and preferred to search for their aphid hosts at 14:00 h. Five EAG-active tobacco volatiles (trans-2-hexenal, methyl salicylate, benzaldehyde, cis-3-hexen-1-ol, and 1-hexanal) were found to significantly attract A. gifuensis females at different concentration ranges. The practical implications of these results are discussed in the framework of the sustainable biological control of pest aphids in agricultural production systems.

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Section: Discussionmentioning

confidence: 99%

Host-Seeking Behavior of Aphidius gifuensis (Hymenoptera: Braconidae) Modulated by Chemical Cues Within a Tritrophic Context

Song

Liu

Cai

et al. 2021

Journal of Insect Science

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“…The release of HIPVs requires time. In a wild tobacco, the release of terpenes is regulated by circadian clock (Joo et al, 2019). In tomato, significant increases in the emission of β‐myrcene, ρ‐cymene and β‐caryophyllene, only started 5 days after initial infestation (Zhang et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Herbivore‐induced DMNT catalyzed by CYP82D47 plays an important role in the induction of JA‐dependent herbivore resistance of neighboring tea plants

Jing

Gao

et al. 2020

Plant Cell & Environment

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Herbivore‐induced plant volatiles play important ecological roles in defense against stresses. However, if and which volatile(s) are involved in the plant–plant communication in response to herbivorous insects in tea plants remains unknown. Here, plant–plant communication experiments confirm that volatiles emitted from insects‐attacked tea plants can trigger plant resistance and reduce the risk of herbivore damage by inducing jasmonic acid (JA) accumulation in neighboring plants. The emission of six compounds was significantly induced by geometrid Ectropis obliqua, one of the most common pests of the tea plant in China. Among them, (E)‐4,8‐dimethyl‐1,3,7‐nonatriene (DMNT) could induce the accumulation of JA and thus promotes the resistance of neighboring intact plants to herbivorous insects. CsCYP82D47 was identified for the first time as a P450 enzyme, which catalyzes the final step in the biosynthesis of DMNT from (E)‐nerolidol. Down‐regulation of CsCYP82D47 in tea plants resulted in a reduced accumulation of DMNT and significantly reduced the release of DMNT in response to the feeding of herbivorous insects. The first evidence for plant–plant communication in response to herbivores in tea plants will help to understand how plants respond to volatile cues in response to herbivores and provide new insight into the role(s) of DMNT in tea plants.

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“…Volatiles, which have a diurnal release pattern, are subject to multiple control mechanisms regulating their release (Cheng et al, 2007; Christensen et al, 2013; Gouinguene & Turlings, 2002; Joo et al, 2018; Joo et al, 2019; Kolosova et al, 2001; Zeng et al, 2017). Apart from hypothetical transporters as proposed above, emission of diurnal volatiles is often correlated with the light‐driven stomatal opening (Niinemets et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Herbivore‐induced and constitutive volatiles are controlled by different oxylipin‐dependent mechanisms in rice

Mujiono

Tohi

Sobhy

et al. 2021

Plant Cell & Environment

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Despite the importance of volatile organic compounds (VOCs) for plants, control mechanisms for their basal and stress-induced biosynthesis and release remain unclear. We sampled and characterized headspace and internal leaf volatile pools in rice (Oryza sativa), after a simulated herbivory treatment, which triggers an endogenous jasmonate burst. Certain volatiles, such as linalool, were strongly upregulated by simulated herbivory stress. In contrast, other volatiles, such as β-caryophyllene, were constitutively emitted and fluctuated according to time of day. Transcripts of the linalool synthase gene transiently increased 1-3 h after exposure of rice to simulated herbivory, whereas transcripts of caryophyllene synthase peaked independently at dawn. Unexpectedly, although emission and accumulation patterns of rice inducible and constitutive VOCs were substantially different, both groups of volatiles were compromised in jasmonate-deficient hebiba mutants, which lack the allene oxide cyclase (AOC) gene. This suggests that rice employs at least two distinct oxylipindependent mechanisms downstream of AOC to control production of constitutive and herbivore-induced volatiles. Levels of the JA precursor, 12-oxo-phytodienoic acid (OPDA), were correlated with constitutive volatile levels suggesting that OPDA or its derivatives could be involved in control of volatile emission in rice.

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The circadian clock contributes to diurnal patterns of plant indirect defense in nature

Cited by 11 publications

References 16 publications

Host-Seeking Behavior of Aphidius gifuensis (Hymenoptera: Braconidae) Modulated by Chemical Cues Within a Tritrophic Context

Host-Seeking Behavior of Aphidius gifuensis (Hymenoptera: Braconidae) Modulated by Chemical Cues Within a Tritrophic Context

Herbivore‐induced DMNT catalyzed by CYP82D47 plays an important role in the induction of JA‐dependent herbivore resistance of neighboring tea plants

Herbivore‐induced and constitutive volatiles are controlled by different oxylipin‐dependent mechanisms in rice

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