Diapause in Anthonomus grandis Boh.

Brazzel, J. R.; Newsom, L. D.

doi:10.1093/jee/52.4.603

Cited by 86 publications

(50 citation statements)

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“…typically increase (Ring, 1981;Cannon and Block, 1988;Lee and Denlinger, 1991), although this reduction may only reflect increases in lipid stores (Danks, 2000). For example, in studies of the boll weevil, Anthonomus grandis Boh., an increase in fat correlated to a decrease in body water (Brazzel and Newsom, 1959).…”

Section: September 2004mentioning

confidence: 88%

Characterization of triacylglycerols from overwintering prepupae of the alfalfa pollinator Megachile rotundata (Hymenoptera: Megachilidae)

Buckner¹,

Kemp²,

Bosch³

2004

Arch Insect Biochem Physiol

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Alfalfa leafcutting bees, Megachile rotundata (F.), overwinter as prepupae. The internal lipids were extracted from prepupae that had been wintered at 4°C for 7 months. Megachile rotundata prepupae possessed copious quantities of internal lipids (20% of the fresh weight) that were extracted with CHCl 3 /methanol (2:1). Transmission electron microscopy revealed that lipids were stored within very large intracellular vacuoles. Separation by silica chromatography revealed that 88% of the internal lipids were triacylglycerols. Ester derivatives of fatty acids from triacylglycerol components were analyzed by gas chromatography-mass spectrometry and 15 fatty acid constituents were identified. The majority (76%) of the triacylglycerol fatty acids were unsaturated fatty acids. The major triacylglycerol fatty acid constituent (30%) was the C 16 monounsaturated fatty acid, palmitoleic acid (16:1, hexadec-9-enoic acid), with substantial amounts of linolenic acid (18:3, octadec-9,12,15-trienoic acid, 15%), palmitic acid (16:0, hexadecanoic acid, 14%) and oleic acid (18:1, octadec-9-enoic acid, 13%). Palmitoleic acid as the major fatty acid of an insect is an unusual occurrence as well as the presence of the 16-carbon polyunsaturated fatty acids, 16:2 and 16:3. The major intact triacylglycerol components were separated and identified by high performance liquid chromatography-mass spectrometry. A complex mixture of approximately 40 triacylglycerol components were identified and major components included palmitoyl palmitoleoyl oleoyl glycerol, palmitoyl palmitoleoyl palmitoleoyl glycerol, myristoyl palmitoleoyl palmitoleoyl glycerol, myristoleoyl palmitoyl palmitoleoyl glycerol, and palmitoyl palmitoleoyl linolenoyl glycerol. Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the U.S. Department of Agriculture. U.S. Department of Agriculture, Agricultural Research Service, Northern Plains Area, is an equal opportunity/ affirmative action employer and all agency services are available without discrimination.Abbreviations used: BSA = N,O-bis-(trimethylsilyl) acetamide; FAME = fatty acid methyl ester; L = linoleic acid; La = lauric acid; Ln = linolenic acid; M = myristic acid; Mo = myristoleic acid; O = oleic acid; P = palmitic acid; Po = palmitoleic acid; P L = palmitlinoleic acid; P Ln = palmitlinolenic acid; S = stearic acid; TAG = triacylglycerol; t-BME = tert-butylmethylether; TMS = trimethylsilyl.

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Section: September 2004mentioning

confidence: 88%

Characterization of triacylglycerols from overwintering prepupae of the alfalfa pollinator Megachile rotundata (Hymenoptera: Megachilidae)

Buckner¹,

Kemp²,

Bosch³

2004

Arch Insect Biochem Physiol

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“…As regards the weevils, oocyte resorption has been mentioned in relation to Anthonomus grandis Boheman (Brazzel & Newsom 1959), Conotrachelus nenuphar (~erbst) (Smith & Salkeld 1964), and Hypera posuca (Gyllenhal) (Litsinger & Apple 1973). However, no details have been provided on the resorption bodies or on the concomitant implications of oocyte resorption.…”

Section: Introductionmentioning

confidence: 99%

Implications of oöcyte resorption bodies in the ovarioles of Argentine stem weevil,Listronotus bonariensis(Coleoptera: Curculionidae)

Goldson

1983

New Zealand Journal of Zoology

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Yellow-orange inclusions were occasionally found in the ovariolar constrictions of Listronotus bonariensis (Kuschel). Investigation established that they were probably crystals of f)-carotene, for which a liquid precursor was present in very high concentrations. Such inclusions are often found in the ovarioles of acridids, and can arise from the resorption of terminal oocytes. Caging, which suppresses egg production, increased the proportion of weevils with resorption crystals. In a naturally occurring reproductive population the crystals became prevalent at the onset of diapause, and were demonstrable in 30% of the total population throughout the winter. The incidence of crystals indicates that the female population was of mixed sexual maturity, which may have been due to differences in age. Almost invariably only fertilised females contained resorption crystals, indicating that advanced vitellogenesis and egg production take place after mating rather than before.

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“…Diapausing females and males of the cotton boll weevil, Anthonomus grandis. have sperm in their spermathecae and seminal vesicles, respectively, but whether the males mate prior to winter is not known [8]. In this study, the sperm in females were observed not to survive winter; females from another population of this species, however, have been observed to store viable sperm for as long as 7 months [9].…”

Section: Discussionmentioning

confidence: 58%

Mexican bean beetles mate successfully in diapause

Taylor

1984

International Journal of Invertebrate Reproduction and Developm

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This paper reports that male Mexican bean beetles in diapause contain mature sperm, which is probably produced, at least in part, during early adulthood when they can be distinguished from non-diapause males. Diapause males will mate with both diapause and nondiapause females. Diapause females do not contain mature eggs but they will mate. The sperm carried by diapause females can survive cold temperatures and subsequently produce viable offspring. The evolutionary factors that may maintain these behaviors are discussed.Mexican bean beetle; Coccinellidae; Epilachna uariuestis; diapause; mating behavior

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Diapause in Anthonomus grandis Boh.

Cited by 86 publications

References 0 publications

Characterization of triacylglycerols from overwintering prepupae of the alfalfa pollinator Megachile rotundata (Hymenoptera: Megachilidae)

Characterization of triacylglycerols from overwintering prepupae of the alfalfa pollinator Megachile rotundata (Hymenoptera: Megachilidae)

Implications of oöcyte resorption bodies in the ovarioles of Argentine stem weevil,Listronotus bonariensis(Coleoptera: Curculionidae)

Mexican bean beetles mate successfully in diapause

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