Systemic Induction of Terpenoid Aldehydes in Cotton Pigment Glands by Feeding of Larval Spodoptera exigua

McAuslane, Heather J.; Alborn, Hans T.; Toth, John P.

doi:10.1023/a:1022575313325

Cited by 77 publications

(92 citation statements)

References 31 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: 93%

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: 93%

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Zebelo

Disi

Balusu

et al. 2017

Journal of Plant Interactions

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“…However, the PCSO concentrations observed in healthy leaves from damaged plants were not as high as those observed in injured leaves. Systemic induction of secondary compounds has been reported in numerous other plants (Green and Ryan, 1972;Baldwin, 1988b;Turlings and Tumlinson, 1992;Potting et al, 1995;Cortesero et al, 1997;McAuslane et al, 1997;Mattiacci et al, 2001;Neveu et al, 2002).…”

Section: Discussionmentioning

confidence: 92%

Increased Sulfur Precursors and Volatiles Production by the Leek Allium porrum in Response to Specialist Insect Attack

et al. 2005

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Abstract-To defend themselves against herbivory, plants use a variety of direct and indirect strategies involving induced increases in secondary substances. Species of the Allium genus (Alliaceae), such as the leek Allium porrum (L.), produce nonprotein sulfur amino acids derived from cysteine, i.e., alk(en)yl-cysteine sulfoxides that are precursors of volatile thiosulfinates and disulfides. These defend most species including the specialist leek moth, Acrolepiopsis assectella. We determined by measuring the increase in the sulfur precursor propyl-cysteine sulfoxide (PCSO) if production of this precursor is induced in response to moth attack and mechanical wounding. The concentration of PCSO was determined by HPLC in 2-or 6-mo-old leeks after attacks of various intensity either by the specialist leek moth or by a generalist moth, Agrotis ipsilon. Injury-induced release of sulfur volatiles was measured by GC/MS after the attacks. Results showed an increase in the production of sulfur compounds in both the precursor and volatile form, occurring only in association with intensive attacks by leek moths. The increase in sulfur precursors also led to an increase in the release of sulfur volatiles. This induced response may provide an effective defense strategy against the plant's main natural enemy, both directly and indirectly by attracting entomophagous insects.

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“…44 These plants face two different types of insect herbivores: the leaf miner Chromatomyia platensis (Brethes) (Diptera: Agromyzidae) and the cecydomid gall insect (Diptera: Cecydomyiidae). [48][49][50] The concentration of terpenoids in different parts of the plant affected by leaf miner insect and undamaged leaves as well as leaves from stems with and without galls was determined. The monoterpenes pulegone and menthone accounted for about 70%.…”

Section: Plant Defense Systems Against Herbivoresmentioning

confidence: 99%

Animal plant warfare and secondary metabolite evolution

Wöll

Kim

Greten

et al. 2013

Nat. Prod. Bioprospect.

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Abstract:The enduring discussion, why plants produce secondary metabolites with pharmacologically and toxicologically active towards mammals traces back to the eminent role of medicinal plants in the millennia-old history of manhood. In recent years, the concept of an animal plant warfare emerged, which focused on the co-evolution between plants and herbivores. As a reaction to herbivory, plants developed mechanical defenses such as thorns and hard shells, which paved the way for adapted animal physiques. Plants evolved further defense systems by producing chemicals that exert toxic effects on the animals that ingest them. As a result of this selective pressure, animals developed special enzymes, e.g. cytochrome P450 monooxigenases (CYP450) that metabolize xenobiotic phytochemicals. As a next step in the evolutionary competition between plants and animals, plants evolved to produce non-toxic pro-drugs, which become toxic only after ingestion by animals through metabolization by enzymes such as CYP450. Because these sequestered evolutionary developments call to mind an arms race, the term animal plant warfare has been coined. The evolutionary competition between plants and animals may help to better understand the modes of action of medicinal plants and to foster the efficient and safe use of phytotherapy nowadays.

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Systemic Induction of Terpenoid Aldehydes in Cotton Pigment Glands by Feeding of Larval Spodoptera exigua

Cited by 77 publications

References 31 publications

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Spodoptera exigua modulates gossypol biosynthesis in cotton Gossypium hirsutum

Increased Sulfur Precursors and Volatiles Production by the Leek Allium porrum in Response to Specialist Insect Attack

Animal plant warfare and secondary metabolite evolution

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