Ultrastructure of Lepidopteran Sperm within Spermathecae1,2

Riemann, John G.; Gassner, George

doi:10.1093/aesa/66.1.154

Cited by 28 publications

(14 citation statements)

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“…The most intriguing implications of this subject matter are the maintenance of types of spermatozoa without the same probability of fertilization. There are some possible explanations for this, as follows: (i) it may enhance male fertilization success as a "mating plug" (Woodward, 1940;Bellis, 1988, 1989;Ladle and Foster, 1992); (ii) provide nutrients to females (Riemann and Gassner, 1973;Sivinski, 1980Sivinski, , 1984; or (iii) represent a fertilization strategy that is different from that of spermatozoa bundles (Joly et al, 1991;Till-Bottraud et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure and heteromorphism of spermatozoa in five species of bugs (Pentatomidae: Heteroptera)

Araújo

Lino‐Neto

Ramalho

et al. 2011

Micron

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Pentatomidae is one of the largest Heteroptera families, comprising about 10% of the species estimated for the suborder. In spite of existing studies, doubts remain regarding the systematics of Pentatomomorpha. In this study, five species of Pentatomidae spermatozoa were examined to achieve characteristics that enable inferences in the phylogeny of the group and in behavioral issues associated with the presence of polymorphisms. Spermatozoa polymorphisms, characterized by two classes of sizes, are found in Podisus nigrispinus, Podisus distinctus, and Brontocoris tabidus, whereas Thynacanta marginata (Dallas) and Supputius cincticeps have single-size spermatozoa. The head region consists of an acrosome, a nucleus, and part of the centriolar adjunct. In the more anterior region, the nucleus is parallel to the centriolar adjunct. In the nucleus-flagellum transition region, the nucleus overlaps the anterior region of the mitochondrial derivatives, just above the axoneme. The mitochondrial derivatives and the axoneme run the entire extent of the flagellum. In species in which the spermatozoa are polymorphic, the larger spermatozoa have derivatives mitochondrial approximately 3-fold larger than the smaller spermatozoa. Characteristics derived from the morphology of spermatozoa indicate synapomorphies and are promising for systematic studies.

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Section: Discussionmentioning

confidence: 99%

Ultrastructure and heteromorphism of spermatozoa in five species of bugs (Pentatomidae: Heteroptera)

Araújo

Lino‐Neto

Ramalho

et al. 2011

Micron

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“…Sperm ultrastructure has been examined in some Micropterigidae and Exoporia (Sonnenschein & Häuser 1990;Friedländer 1983 a, b;Hamon & Chauvin 1992), but monotrysian Heteroneura remain unstudied. Exemplars of several families across the Ditrysia have been surveyed by Phillips (1971): and Riemann & Gassner (1973), while single-species treatments include studies of members of Tortricidae (Friedländer & Benz 1981), Pyralidae (Ashrafl & Roppel 1973;Friedländer 1976Friedländer , 1983Friedländer & Miesel 1977, Wolf 1997, Bombycoidea-Saturniidae (Friedländer et al 1981) and -Bombycidae (Yasuzumi & Oura 1964King & Akai 1971 a, b;Friedländer & Gitay 1972), butterflies (LaiFook 1982 a, Zylberberg 1969, Mancini & Dolder 2001, Noctuoidea-Noctuidae (LaChance & Olstad 1988, Medeiros & Silveira 1996, -Lymantriidae (Leclercq-Smekens 1978 a, b;Garvey 2000) and -Arctiidae (Trandaburu et al 1976). The comprehensive treatise by Jamieson et al (1999) forms the principal basis for the following account, and it must be consulted for further details.…”

Section: Spermatozoamentioning

confidence: 99%

16. Reproductive organs

Kristensen¹

2003

Band 4: Arthropoda, 2 Hälfte: Insecta, Lepidoptera, Moths and Butterflies, Teilband/Part 36, Vol 2: Morphology, Physiology, And

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“…In many animals, the parasperm do not persist in female sperm storage areas, suggesting that these parasperm could break down and serve as a nutritional gift to the fertilizing sperm, the female and/or to offspring (Schrader, 1960; Richards, 1963; Riemann & Gassner, 1973; Sivinski, 1980; Buckland‐Nicks, 1998). The likelihood of insect parasperm serving this function is low primarily because most sperm heteromorphic insects transfer sperm in packages containing energetically expensive seminal fluids that probably provide much more nutrition than the simple parasperm could (Swallow & Wilkinson, 2002).…”

Section: Nutritive Contributionmentioning

confidence: 99%

Pollen and sperm heteromorphism: convergence across kingdoms?

Till–Bottraud

Joly

Lachaise

et al. 2005

J of Evolutionary Biology

102

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Sperm competition theory predicts that males should produce many, similar sperm. However, in some species of animals and plants, males exhibit a heteromorphism that results in the production of at least two different types of sperm or pollen grains. In animals, sperm heteromorphism typically corresponds to the production of one fertile morph and one (or more) sterile morph(s), whereas in plants two or more pollen morphs (one of which can be either sterile or fertile) are produced in all flowers but sometimes in different anthers. Heteromorphism has arisen independently several times across phyla and at different phylogenetic levels. Here, we compare and contrast sperm and pollen heteromorphism and discuss the evolutionary hypotheses suggested to explain heteromorphism in these taxa. These hypotheses include facilitation, nutritive contribution, blocking, cheap filler, sperm flushing or killing for animals; outcrossing and precise cross‐pollen transfer or bet‐hedging strategy for plants; cryptic female choice for both. We conclude that heteromorphism in the two phyla is most likely linked to a general evolutionary response to sexual selection, either to increase one male's sperm or pollen success in competition with other males, or mediate male/female interactions. Therefore, although sperm and pollen are not homologous, we suggest that heteromorphism represents an example of convergence across kingdoms.

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Ultrastructure of Lepidopteran Sperm within Spermathecae1,2

Cited by 28 publications

References 0 publications

Ultrastructure and heteromorphism of spermatozoa in five species of bugs (Pentatomidae: Heteroptera)

Ultrastructure and heteromorphism of spermatozoa in five species of bugs (Pentatomidae: Heteroptera)

16. Reproductive organs

Pollen and sperm heteromorphism: convergence across kingdoms?

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