Pheromones in relation to aggregation and reproduction in desert locusts

Ferenz, Hans‐Jörg; Seidelmann, Karsten

doi:10.1046/j.1365-3032.2003.00318.x

Cited by 56 publications

(34 citation statements)

References 51 publications

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“…In one case, a male passed paired locusts as if he had not noticed the presence of the female, the situation being similar to what has been reported in the laboratory (Seidelmann and Ferenz, 2002;Ferenz and Seidelmann, 2003).…”

Section: Ovipositing Behavior and Adult Body Colorationsupporting

confidence: 75%

Upsurges of desert locust populations in Mauritania: Body coloration, behavior and morphological characteristics

Tanaka

Maeno

Mohamed

et al. 2010

Appl. Entomol. Zool.

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A short excursion was made to the western part of Mauritania to investigate increasing populations of the desert locust, Schistocerca gregaria, in October 2009. The size of locust populations observed ranged from Ͻ1 to Ͼ20 individuals per 25 m 2 . Adults from low-and high-density populations were similar in morphometric ratios of F/C and E/F (F, hind femur length; C, maximum head width; E, fore wing length) and the ratios were similar to those reported for solitarious forms. However, locusts from high-density populations were mostly yellow, while those from low-density populations were brown or whitish. The former were observed ovipositing in groups. These observations, together with the fact that some of the females from high-density populations had ovarian eggs significantly larger than those found in females from low-density populations, suggested that gregarization might have occurred after adult emergence. Aggregations of nymphs were observed at many sites, and nymphs with black patterns typically observed in transient and gregarious populations were found together with those with solitarious body coloration, i.e. green or brown. A prompt action of locust control by National Locust Control Center was likely to have contributed to prevent further upsurges in the locust populations in the following seasons.

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Section: Ovipositing Behavior and Adult Body Colorationsupporting

confidence: 75%

Upsurges of desert locust populations in Mauritania: Body coloration, behavior and morphological characteristics

Tanaka

Maeno

Mohamed

et al. 2010

Appl. Entomol. Zool.

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“…The transition between the two phases is reversible before they reach the fourth or fifth instar (10). The gregarious traits and behavior are also regulated by pheromones (11,12), neuropeptides (13,14), and pigmentotrophin (15)(16)(17)(18). Even artificial physical stimulation on the hind legs of the desert locust can trigger phase transformation (11).…”

mentioning

confidence: 99%

The analysis of large-scale gene expression correlated to the phase changes of the migratory locust

Kang

Chen

Zhou

et al. 2004

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

188

218

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The migratory locust is one of the most notorious agricultural pests that undergo a well known reversible, density-dependent phase transition from the solitary to the gregarious. To demonstrate the underlying molecular mechanisms of the phase change, we generated 76,012 ESTs from the whole body and dissected organs in the two phases. Comparing 12,161 unigene clusters, we identified 532 genes as phase-related (P < 0.01). Comprehensive assessment of the phase-related expression revealed that, whereas most of the genes in various categories from hind legs and the midgut are down-regulated in the gregarious phase, several gene classes in the head are impressively up-regulated, including those with peptidase, receptor, and oxygen-binding activities and those related to development, cell growth, and responses to external stimuli. Among them, a superfamily of proteins, the JHPH superfamily, which includes juvenile hormone-binding protein, hexamerins, prophenoloxidase, and hemocyanins, were highly expressed in the heads of the gregarious hoppers and hind legs of the solitary hoppers. Quantitative PCR experiments confirmed in part the EST results. These differentially regulated genes have strong functional implications that numerous molecular activities are involved in phase plasticity. This study provides ample molecular markers and genomic information on hemimetabolous insects and insights into the genetic and molecular mechanisms of phase changes in locusts.solitary phase ͉ gregarious phase ͉ EST ͉ unigene

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“…These observations have been confirmed by similar studies (Simpson et al, 2001;Lester et al, 2005). Pheromones play a role in the control of behavior in locusts (Loher, 1990;Byers, 1991;Pener, 180 S. TANAKA 1991; Pener and Yerushalmi, 1998) and their chemical structures and significance were intensively studied in the last decade (Torto et al, 1994(Torto et al, , 1996Ferenz and Seidelmann, 2003;Hassanali et al, 2005). Recently, it was demonstrated that prolonged pre-copulatory mounting increases the length of copulation, which in turn increases the P 2 , the proportion of offspring sired by the second male to mate, in L. migratoria showing multiple mating .…”

Section: Phase Polyphenismmentioning

confidence: 61%

Corazonin and locust phase polyphenism

Tanaka

2006

Appl. Entomol. Zool.

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Phase polyphenism is an adaptive phenomenon in which some traits vary continuously in response to population densities. In locusts, two extreme phases, solitarious and gregarious, that occur at a low and a high density, respectively, are known and intermediate forms called transient phase also occur in a transition between the two phases or at an intermediate density. Establishment of an albino strain of Locusta migratoria led to the discovery of a neuropeptide, corazonin that is involved in the control of the expression of some phase-related traits in this and another locust, Schistocerca gregaria. This paper describes a summary of phase polyphenism research with a particular emphasis on recent studies about the roles of corazonin in locusts. In L. migratoria, injection of the neuropeptide causes albino nymphs to express various body colors often observed in not only solitarious but also gregarious forms irrespective of the rearing density. Both juvenile hormone and corazonin are necessary to express the green solitarious form normally observed in the field. It has also been suggested that this neuropeptide may be involved in the control of phase-related morphometric ratios of F/C and E/F (Fϭhind femur length; Cϭmaximum head width; Eϭelytron length) as well as the development of antennal olfactory sensilla in the two locusts: injection of the peptide mimics crowding effects, thus inducing gregarious characteristics in solitarious (isolated-reared) locusts. Corazonin and related compounds are widespread among insects. Transplantation of the brain and corpora cardiaca from various donors to albino locusts indicates the presence of corazonin or corazonin-like substances in all 18 insect orders so far screened except for the Coleoptera.

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Pheromones in relation to aggregation and reproduction in desert locusts

Cited by 56 publications

References 51 publications

Upsurges of desert locust populations in Mauritania: Body coloration, behavior and morphological characteristics

Upsurges of desert locust populations in Mauritania: Body coloration, behavior and morphological characteristics

The analysis of large-scale gene expression correlated to the phase changes of the migratory locust

Corazonin and locust phase polyphenism

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