Systemic induction of feeding deterrents in cotton plants by feeding ofSpodoptera SPP. Larvae

Alborn, Hans T.; Röse, Ursula S. R.; McAuslane, Heather J.

doi:10.1007/bf02029945

Cited by 56 publications

(56 citation statements)

References 17 publications

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“…Furthermore, higher level of gossypol showed negative consequences on subsequent feeding by S. exigua larvae and eventually increased larval mortality. The results of this study are in agreement with previous findings by McAuslane et al (1997) and Alborn et al (1996) which showed that S. exigua and Spodoptera littoralis larvae-damaged cotton plants contained much greater quantities of gossypol than control plants and were less preferred in feeding bioassays.…”

Section: Discussionsupporting

confidence: 83%

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Zebelo

Disi

Balusu

et al. 2017

Journal of Plant Interactions

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Cotton plants induce high levels of gossypol in response to herbivore damage. However, little is known about the mechanisms by which insect herbivory modulates gossypol biosynthesis in cotton plants. Here, we report the mechanism by which herbivore damage or insect-originated elicitors modulate the biosynthesis of gossypol and jasmonic acid (JA) in plants. Spodoptera exigua larval-damaged (HD) cotton plants and mechanically damaged plants treated with S. exigua oral secretion (MDOS) showed higher levels of gossypol and JA as well as increased transcript levels of genes involved in the biosynthesis of both secondary plant metabolites, compared to undamaged (UD) or mechanically damaged (MD) plants. In correlation with the observed induction of gossypol and JA, S. exigua larvae that fed on HD and MDOS cotton plants showed significantly reduced weight. The findings provide a better insight into the molecular mechanisms mediating herbivoreinduced plant defense. ARTICLE HISTORY

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Section: Discussionsupporting

confidence: 83%

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Zebelo

Disi

Balusu

et al. 2017

Journal of Plant Interactions

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“…Various studies have shown that damage induces changes in cotton plants which reduces their suitability to herbivores. Such induced resistance has been found in response to both mechanical damage (Croxford et al, 1989) and actual herbivory (Alborn et al, 1996). A comparative study was conducted by Karban (1985), which showed that mechanical damage was as effective in inducing resistance to the two-spotted spider mite as was previous spider mite infestation.…”

Section: Discussionmentioning

confidence: 98%

“…Palatability decreased both with time following damage (over 7 days) and with increasing proximity to the damage site. Alborn et al (1996) reported that both herbivory by S. littoralis and S. exigua resulted in localized as well as systemic induction of feeding deterrency. Karban (1988) reported similar responses by S. exigua to mite-damaged cotton.…”

Section: Discussionmentioning

confidence: 99%

Induction of cotton extrafloral nectar production in response to herbivory does not require a herbivore‐specific elicitor

Wäckers

Wunderlin

1999

Entomologia Exp Applicata

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The production of extrafloral nectar is thought to represent an indirect plant defense, as it allows plants to recruit natural enemies which can protect the plant against herbivore attacks. In previous work we demonstrated that plants may show a strong increase in extrafloral nectar secretion in response to herbivory. Here we address the question of whether this induction is herbivory-specific, or simply a general response to tissue damage. We compared the level of induction in Gossypium herbaceum (L.) (Malvaceae) following either herbivory by Spodoptera littoralis (Boisduval) (Lepidoptera; Noctuidae) or mechanical damage with and without the addition of S. littoralis regurgitate. Both herbivore feeding and mechanical damage significantly raised nectar production. No difference in volume or pattern of nectar secretion was found between natural and mechanical damage, nor between artificially damaged plants treated with regurgitate or water. Our findings indicate that the induction of extrafloral nectar secretion constitutes a general response by the plant to tissue damage, rather than representing a herbivory-specific mechanism. The costs and benefits of such a non-specific strategy for the plant are discussed.

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“…The plastic induction of defense implies an unavoidable time lag between information acquisition (i.e., initial herbivore damage) and plant response (i.e., activation of defense), potentially resulting in ineffective protection of the plant under attack (DeWitt et al 1998). Depending on the study system, this time lag can range from hours (Baldwin et al 1994;Alborn et al 1996) and days (McAuslane et al 1997;Underwood 1998;Agrell et al 2003) to whole seasons (Zvereva et al 1997). Nevertheless, initial damage is usually a reliable cue for future herbivory risk (Karban & Adler 1996;Karban et al 1999), and hence can be used as predictive signal for subsequent damage.…”

Section: Introductionmentioning

confidence: 99%

Timing of induced resistance in a clonal plant network

2010

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After local herbivory, plants can activate defense traits both at the damaged site and in undamaged plant parts such as in connected ramets of clonal plants. Since defense induction has costs, a mismatch in time and space between defense activation and herbivore feeding might result in negative consequences for plant fitness. A short time lag between attack and defense activation is important to ensure efficient protection of the plant. Additionally, the duration of induced defense production once the attack has stopped is also relevant in assessing the cost–benefit balance of inducible defenses, which will depend on the absence or presence of subsequent attacks. In this study we quantified the timing of induced responses in ramet networks of the stoloniferous herb Trifolium repens after local damage by Mamestra brassicae larvae. We studied the activation time of systemic defense induction in undamaged ramets and the decay time of the response after local attack. Undamaged ramets became defense‐induced 38–51 h after the initial attack. Defense induction was measured as a reduction in leaf palatability. Defense induction lasted at least 28 days, and there was strong genotypic variation in the duration of this response. Ramets formed after the initial attack were also defense‐induced, implying that induced defense can extend to new ramet generations, thereby contributing to protection of plant tissue that is both very vulnerable to herbivores and most valuable in terms of future plant growth and fitness.

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Systemic induction of feeding deterrents in cotton plants by feeding ofSpodoptera SPP. Larvae

Cited by 56 publications

References 17 publications

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Induction of cotton extrafloral nectar production in response to herbivory does not require a herbivore‐specific elicitor

Timing of induced resistance in a clonal plant network

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