History of the Germ Line in Male and Female Thrips

Heming, B. S.

doi:10.1007/978-1-4899-1409-5_79

Cited by 14 publications

(12 citation statements)

References 53 publications

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“…Further studies are required to firmly establish the origin of the anterior anchoring structure; because of its apical position it would correspond to an acrosome, but there is no evidence of an active Golgi system during spermiogenesis. We conclude that thrips spermatozoa of the examined species are devoid of an acrosome but provided with an elongated dense structure, already mentioned by Heming [1995]. As this structure seems to be connected to the centriole adjunct material, it might be related to the accessory body observed in many insect spermatozoa [Jamieson et al, 1999].…”

Section: The Three-flagellated Transient Stagesupporting

confidence: 57%

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Ultrastructural analysis of the aberrant axoneme morphogenesis in thrips (Thysanoptera, Insecta)

Paccagnini

Mencarelli

Mercati

et al. 2007

Cell Motil. Cytoskeleton

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Thrips spermiogenesis is characterized by unusual features in the differentiating spermatid cells. Three centrioles from which three individual short flagella are initially assembled, make the early spermatid a tri-flagellated cell. Successively, during spermatid maturation, the three basal bodies maintain a position close to the most anterior end of the elongating nucleus, so that the three axonemes are progressively incorporated in the spermatid cytoplasm, where they run in parallel to the main nuclear axis. Finally, the three axonemes amalgamate to form a microtubular bundle. The process starts with the formation of rifts at three specific points in each axonemal circumference, corresponding to sites 1,3,7 and leads to the formation of 9 microtubular rows of different length, i.e. 3 "dyads", 3 "triads" and 3 "tetrads". In the spermatozoon, the nucleus, the mitochondrion and the bundle of microtubules are arranged in a helicoidal pattern. The elongation of the spermatozoon is allowed by the deep anchorage of the spermatid to the cyst cell through a dense mass of material which, at the end of spermiogenesis, becomes a long anterior cylindrical structure. This bizarre "axoneme" does not show any trace of progressive movement but it is able to beat. According to the presence of dynein arms, sliding can take place only within each row and not between the rows. The possible molecular basis underlying the peculiar instability of thrips axonemes is discussed in light of the present knowledge on the organization of the axoneme in mutant organisms carrying alterations of the tubulin molecule.

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Section: The Three-flagellated Transient Stagesupporting

confidence: 57%

“…In Tubulifera each cluster of spermatids is surrounded by a cyst cell, which, during spermiogenesis, progressively reduces its cytoplasm to a thin layer. In contrast, Terebrantia contain in the testis a single spermatid cyst [Heming, 1995].…”

Section: The Tri-flagellated Spermatidmentioning

confidence: 98%

Ultrastructural analysis of the aberrant axoneme morphogenesis in thrips (Thysanoptera, Insecta)

Paccagnini

Mencarelli

Mercati

et al. 2007

Cell Motil. Cytoskeleton

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Section: Conditions That Promote Resistancementioning

confidence: 99%

“…Finally, WFT has a reproduction system based on haplodiploidy, whereby males are produced uniparentally from unfertilised, haploid eggs, and females are produced biparentally from fertilised, diploid eggs 33–35. Female WFT are diploid, whereas male WFT are haploid 34, 35. A primary consequence of a haplodiploid reproduction is that resistance genes arising by mutation are exposed to selection from the outset in hemizygous males, irrespective of intrinsic dominance or recessiveness,32 which tends to accelerate (although not always) resistance to insecticide development 33, 35–39.…”

Section: Conditions That Promote Resistancementioning

confidence: 99%

Insecticide resistance management strategies against the western flower thrips, Frankliniella occidentalis

Bielza¹

2008

Pest Management Science

192

131

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Western flower thrips (WFT), Frankliniella occidentalis (Pergande), is an economically important pest of a wide range of crops grown throughout the world. Insecticide resistance has been documented in many populations of WFT. Biological and behavioural characteristics and pest management practices that promote insecticide resistance are discussed. In addition, an overview is provided of the development of insecticide resistance in F. occidentalis populations and the resistance mechanisms involved. Owing to widespread resistance to most conventional insecticides, a new approach to insecticide resistance management (IRM) of F. occidentalis is needed. The IRM strategy proposed consists of two parts. Firstly, a general strategy to minimise the use of insecticides in order to reduce selection pressure. Secondly, a strategy designed to avoid selection of resistance mechanisms, considering cross-resistance patterns and resistance mechanisms.

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“…This hypothesis is based on the large degree of morphological divergence between these two groups, and on a small number of characters whose reliability as indicators of relationship is open to question (Hood, 1915;Priesner, 1928;Lewis, 1973;Moritz, 1989Moritz, , 1991; see also Vance, 1974;Wilson, 1975). The presence of two axonemes per sperm flagellum in tubuliferans (two species) and three axonemes per flagellum in terebraniians (three species of Thripidae, one Aeolothripidae and one Merothripdae) clearly supports this hypothesis (Bode, 1983(Bode, , 1988Heming, 1995). However, few thrips taxa have been examined for this trait and convergence of sperm structure may not be rare (Boudreaux, 1979. pp.…”

Section: Introductionmentioning

confidence: 91%

Molecular phylogenetics of Thysanoptera

Crespi

Carmean

Vawter

et al. 1996

Systematic Entomology

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Analyses of morphological data on the higher‐level phylogenetics of Thysanoptera have suggested two alternative hypotheses: (1) sister‐taxon status of the monophyletic suborders Terebrantia and Tubulifera. and (2) paraphyly of Terebrantia with respect to Tubulifera. Analyses of nucleotide sequence data from the mitochondrial gene cytochrome oxidase I and the nuclear gene I8S rONA using maximum parsimony. neighbour joining. and maximum likelihood provide strong support for the hypothesis of a sister‐taxon relationship between the Terebrantia and Tubulifera. These data resolve this long‐standing controversy in thysanopteran phylogenetics and provide a framework for further studies of higher‐level relationships in this order.

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History of the Germ Line in Male and Female Thrips

Cited by 14 publications

References 53 publications

Ultrastructural analysis of the aberrant axoneme morphogenesis in thrips (Thysanoptera, Insecta)

Ultrastructural analysis of the aberrant axoneme morphogenesis in thrips (Thysanoptera, Insecta)

Insecticide resistance management strategies against the western flower thrips, Frankliniella occidentalis

Molecular phylogenetics of Thysanoptera

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