An assessment of the life time biosynthesis potential of the male boll weevil

Hedin, P. A.; Hardee, D. D.; Thompson, A. C.; Gueldner, R. C.

doi:10.1016/0022-1910(74)90200-5

Cited by 15 publications

(6 citation statements)

References 12 publications

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“…This is similar to the observed increase in pheromone production during this time frame (Hedin et al, 1974b;Gueldner and Wiygul, 1978). In bark beetles, HMG-R is a key regulated enzyme involved in controlling isoprenoid pheromone production and much higher amounts are observed in whole insect and isolated midgut tissue after JH III treatment (Tillman et al, 1998(Tillman et al, , 2004Hall et al, 2002a;Tittiger et al, 2003Tittiger et al, , 2005.…”

Section: Northern Analysis Of Day 1 To Day 20 Malessupporting

confidence: 80%

“…Although variability was detected between samples, HMG-R expression levels were significantly (Dunnetts test, P < 0.05) higher at days 7, 10, 12, 15, 16, and 20 compared to day 1. The increase observed in HMG-R expression correlates with pheromone production increasing rapidly with age until day eight and then slowly through the 30th day (Hedin et al, 1974b;Gueldner and Wiygul, 1978). weevils is the site of pheromone production (Wiygul et al, , 1990Wiygul and Siklorowski, 1985).…”

Section: Northern Analysis Of Day 1 To Day 20 Malesmentioning

confidence: 86%

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Site of pheromone biosynthesis and isolation of HMG‐CoA reductase cDNA in the cotton boll weevil, Anthonomus grandis

Taban

Blake

et al. 2006

Arch Insect Biochem Physiol

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Isolated gut tissue from male cotton boll weevil, Anthonomus grandis (Coleoptera: Curculionidae), incorporated radiolabeled acetate into components that co-eluted with monoterpenoid pheromone components on HPLC. This demonstrates that pheromone components of male A. grandis are produced de novo and strongly suggests that pheromone biosynthesis occurs in gut tissue. A central enzyme in isoprenoid biosynthesis is 3-hydroxy-3-methylglutaryl-CoA reductase (HMG-R), and a full-length HMG-R cDNA was isolated from A. grandis. The predicted translation product was 54 and 45% identical to HMG-R from Ips paraconfusus and Drosophila melanogaster, respectively. HMG-R gene expression gradually increased with age in male A. grandis, which correlates with pheromone production. However, topical application of JH III did not significantly increase HMG-R mRNA levels.

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Section: Northern Analysis Of Day 1 To Day 20 Malessupporting

confidence: 80%

Section: Northern Analysis Of Day 1 To Day 20 Malesmentioning

confidence: 86%

Site of pheromone biosynthesis and isolation of HMG‐CoA reductase cDNA in the cotton boll weevil, Anthonomus grandis

Taban

Blake

et al. 2006

Arch Insect Biochem Physiol

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“…However, bark beetles release unusually large amounts of pheromones compared to most insects, perhaps partly because a large part of bark beetle pheromones are not synthesised de novo but extracted from the host tree (Landolt & Phillips, 1997) which might reduce metabolic costs. By comparison, the approximate lifetime cost of pheromone production for a male boll weevil, Anthonomus grandis , is 0.2 % of his body mass (Hedin et al , 1974). A search for more general costs of pheromone production needs to account for the amount of resources and energy needed for synthesising small amounts of chemicals.…”

Section: Key Criteria For Mate Assessment Pheromonesmentioning

confidence: 99%

The role of chemical communication in mate choice

2007

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Chemical signals are omnipresent in sexual communication in the vast majority of living organisms. The traditional paradigm was that their main purpose in sexual behaviour was to coordinate mate and species recognition and thus pheromones were conserved in structure and function. In recent years, this view has been challenged by theoretical analyses on the evolution of pheromones and empirical reports of mate choice based on chemical signals. The ability to measure precisely the quantity and quality of chemicals emitted by single individuals has also revealed considerable individual variation in chemical composition and release rates, and there is mounting evidence that prospecting mates respond to this variation. Here, we review the evidence for pheromones as indicators of mate quality and examine the extent of their use in individual mate assessment. We begin by briefly defining the levels of mate choice--species recognition, mate recognition and mate assessment. We then explore the degree to which pheromones satisfy the key criteria necessary for their evolution and maintenance as cues in mate assessment; that is, they should exhibit variation across individuals within a sex and species; they should honestly reflect an individual's quality and thus be costly to produce and/or maintain; they should display relatively high levels of heritability. There is now substantial empirical evidence that pheromones can satisfy all these criteria and, while measurements of the actual metabolic cost of pheromone production remain to some degree lacking, trade-offs between pheromone production and various fitness-related characters such as growth rate, immunocompetence and longevity have been reported for a range of species. In the penultimate section, we outline the growing number of studies where the consequences of chemical-based mate assessment have been investigated, specifically focussing on the reported direct and genetic benefits accrued by the receiver. Finally, we highlight potential areas for future research and in particular emphasise the need for interdisciplinary research that combines exploration of chemical, physiological and behavioural processes to further our understanding of the role of chemical cues in mate assessment.

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“…Previous reports of pheromone composition, based on fecal extractions, have varied widely. For example, Tumlinson et al (1970) reported component ratios of 52.4:39.3:4.1:4.1, whereas Hedin et al (1974) reported a composition of 6:6:2:1 (l:ll:lll:lV). McGovern et al (1976) combined components Ill and IV and reported a composition of 46:10:44 (l:ll:lll+lV).…”

Section: Discussionmentioning

confidence: 99%

Pheromone Production by the Boll Weevil (Coleoptera: Curculionidae) Fed Cotton Squares and Bolls

Spurgeon

Suh

2009

Journal of Entomological Science

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The boll weevil, Anthonomus grand/s Boheman, produces pheromone on a variety of diets, but access to flower buds (squares) or small fruit (boils) of cotton, Gossypium hirsutum L., is thought necessary for high levels of pheromone production. However, estimates of the pheromone emitted by weevils fed boils are not available. We used headspace collections to determine (1) whether male weevils already emitting pheromone could sustain production on boils, and (2) whether pheromone emission could be initiated on a boll diet. Male weevils switched to a diet of small (12 -15 mm diam) or medium (20 -23 mm diam) sized boils after feeding on squares (5 -7 mm diam) for 7 d maintained pheromone releases at levels > that of weevils remaining on squares through the 13 1 ' day of adulthood. Pheromone composition did not vary substantially among the diets. When the diets were provided beginning at adult eciosion, weevils initiated pheromone emission similarly on all diets, but weevils fed small boils released the most pheromone by day 9 of adulthood. No difference in pheromone composition was observed among the diet treatments. in addition, weevils that entered diapause by the end of the experiments produced only small amounts of pheromone. The high levels of pheromone production by weevils fed boils may be ecologically important in ensuring that potential overwintering females are mated before emigrating from maturing cotton. Our findings also suggest that diminished competition between naturally-produced pheromone and traps is not an adequate explanation for commonly observed increases in late-season captures by pheromone traps.

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An assessment of the life time biosynthesis potential of the male boll weevil

Cited by 15 publications

References 12 publications

Site of pheromone biosynthesis and isolation of HMG‐CoA reductase cDNA in the cotton boll weevil, Anthonomus grandis

Site of pheromone biosynthesis and isolation of HMG‐CoA reductase cDNA in the cotton boll weevil, Anthonomus grandis

The role of chemical communication in mate choice

Pheromone Production by the Boll Weevil (Coleoptera: Curculionidae) Fed Cotton Squares and Bolls

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