134 lines
25 KiB
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134 lines
25 KiB
XML
<document id="7B6D4867A201099C008A3596F707B329" ID-DOI="10.1111/j.1096-3642.2008.00385.x" ID-ISSN="0024-4082" ID-Zenodo-Dep="5447636" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1630462615209" checkinUser="felipe" docAuthor="Healy, John M., Mikkelsen, Paula M. & Bieler, Rüdiger" docDate="2008" docId="131887E2633D1E2F1BB84CF8FDACFA1F" docLanguage="en" docName="j.1096-3642.2008.00385.x.pdf" docOrigin="Zoological Journal of the Linnean Society 153 (2)" docSource="https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2008.00385.x" docStyle="DocumentStyle:0DD8C314D74634CE09062A86991413F8.2:ZoolJLinnSoc.2002-2009.journal_article" docStyleId="0DD8C314D74634CE09062A86991413F8" docStyleName="ZoolJLinnSoc.2002-2009.journal_article" docStyleVersion="2" docTitle="Donax (Plebidonax) deltoides" docType="treatment" docVersion="4" lastPageNumber="333" masterDocId="EF21FF9A63351E271B6E4855F943FFD8" masterDocTitle="Sperm ultrastructure in Hemidonax pictus (Hemidonacidae, Bivalvia, Mollusca): comparison with other heterodonts, especially Cardiidae, Donacidae and Crassatelloidea" masterLastPageNumber="347" masterPageNumber="325" pageNumber="333" updateTime="1699279852295" updateUser="plazi" zenodo-license-document="CC-BY-4.0" zenodo-license-figures="CC-BY-4.0">
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<mods:title id="48E1535B29550558399191C2310756B5">Sperm ultrastructure in Hemidonax pictus (Hemidonacidae, Bivalvia, Mollusca): comparison with other heterodonts, especially Cardiidae, Donacidae and Crassatelloidea</mods:title>
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<mods:namePart id="1C77E771E5DECF632E1F6B9015B4CF31">Healy, John M.</mods:namePart>
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<mods:namePart id="D7CD090857A2C256F4FAC5BCC996F1E9">Mikkelsen, Paula M.</mods:namePart>
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<mods:namePart id="4D47763B569103FCCD7F9F35B4635080">Bieler, Rüdiger</mods:namePart>
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<mods:title id="C4702F97E67828F54AE330C7B7525876">Zoological Journal of the Linnean Society</mods:title>
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<mods:date id="04304C895B7775E2284B7C6EEE1E33CC">2008</mods:date>
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<mods:number id="5E7F0F81845BCC9D3EDA6016BD873FAE">2008-06-30</mods:number>
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<mods:number id="74DFFF7C1BCD52AC6B85EA46783DE33A">153</mods:number>
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<treatment id="131887E2633D1E2F1BB84CF8FDACFA1F" ID-DOI="http://doi.org/10.5281/zenodo.5492654" ID-Zenodo-Dep="5492654" LSID="urn:lsid:plazi:treatment:131887E2633D1E2F1BB84CF8FDACFA1F" httpUri="http://treatment.plazi.org/id/131887E2633D1E2F1BB84CF8FDACFA1F" lastPageNumber="333" pageId="8" pageNumber="333">
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<subSubSection id="D3AB657F633D1E2F1BB84CF8F828FB30" pageId="8" pageNumber="333" type="nomenclature">
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<paragraph id="9B0E36F4633D1E2F1BB84CF8FBF3FB1B" blockId="8.[214,688,1197,1219]" box="[214,688,1197,1219]" pageId="8" pageNumber="333">
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<heading id="C0468198633D1E2F1BB84CF8FBF3FB1B" box="[214,688,1197,1219]" centered="true" fontSize="9" level="2" pageId="8" pageNumber="333" reason="2">
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<taxonomicName id="5CB14D77633D1E2F1BB84CF8FB12FB19" baseAuthorityName="Lamarck" baseAuthorityYear="1818" box="[214,593,1197,1218]" class="Liliopsida" family="Marantaceae" genus="Donax" kingdom="Plantae" order="Zingiberales" pageId="8" pageNumber="339" phylum="Tracheophyta" rank="species" species="deltoides" subGenus="Plebidonax">
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<emphasis id="A9C5EAE6633D1E2F1BB84CF8F866FB19" box="[214,293,1197,1218]" italics="true" pageId="8" pageNumber="333">DONAX</emphasis>
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(
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<emphasis id="A9C5EAE6633D1E2F1A564CE4F880FB19" box="[312,451,1201,1217]" italics="true" pageId="8" pageNumber="333">PLEBIDONAX</emphasis>
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)
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<emphasis id="A9C5EAE6633D1E2F1ABB4CE4FB12FB19" box="[469,593,1201,1217]" italics="true" pageId="8" pageNumber="333">DELTOIDES</emphasis>
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</taxonomicName>
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(
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<figureCitation id="038A2A71633D1E2F190D4CF8FBEBFB1B" box="[611,680,1197,1219]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">FIG. 6</figureCitation>
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)
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</heading>
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</paragraph>
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<paragraph id="9B0E36F4633D1E2F1BFE4C86F828FB30" blockId="8.[144,759,1235,1777]" box="[144,363,1235,1256]" pageId="8" pageNumber="333">
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<emphasis id="A9C5EAE6633D1E2F1BFE4C86F828FB30" box="[144,363,1235,1256]" italics="true" pageId="8" pageNumber="333">Acrosomal complex</emphasis>
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</paragraph>
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</subSubSection>
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<subSubSection id="D3AB657F633D1E2F1BFE4CA7FDACFA1F" pageId="8" pageNumber="333" type="description">
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<paragraph id="9B0E36F4633D1E2F1BFE4CA7F8E7F929" blockId="8.[144,759,1235,1777]" pageId="8" pageNumber="333">
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The acrosomal vesicle measures approximately 1.16 ± 0.02 Mm (
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<emphasis id="A9C5EAE6633D1E2F1A3E4D44F827FAFE" box="[336,356,1297,1318]" italics="true" pageId="8" pageNumber="333">N</emphasis>
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= 4) in length, has a maximum diameter of 0.85 ± 0.05 Mm (
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<emphasis id="A9C5EAE6633D1E2F1A8A4D65F8BBFA9D" box="[484,504,1328,1349]" italics="true" pageId="8" pageNumber="333">N</emphasis>
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= 4) (about one-third of the distance from the vesicle base) and rests within a broad depression of the nuclear apex (depth 0.24 ± 0.03 Mm,
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<emphasis id="A9C5EAE6633D1E2F1A3A4DD9F82BFA79" box="[340,360,1420,1441]" italics="true" pageId="8" pageNumber="333">N</emphasis>
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= 4) (
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<figureCitation id="038A2A71633D1E2F1AD64DDEFB18FA78" box="[440,603,1419,1441]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A–C, E</figureCitation>
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). A narrow invagination runs almost the full length of the vesicle and is filled with longitudinally fibrous subacrosomal material. Contents of the acrosomal vesicle can be differentiated into a very electron-dense, basal ring (curved-cylindrical in longitudinal profile) and homogeneous, less dense material – the latter enclosing the basal ring and filling the anterior region of the vesicle. The basal ring shows an internal structure of fine, parallel layers (approximately
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<quantity id="5C499B11633D1E2F19444ECBFBCDF96C" box="[554,654,1694,1716]" metricMagnitude="-1" metricUnit="m" metricValue="7.62" metricValueMax="8.89" metricValueMin="6.35" pageId="8" pageNumber="333" unit="in" value="30.0" valueMax="35.0" valueMin="25.0">25–35 in</quantity>
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number) (
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<figureCitation id="038A2A71633D1E2F1BF64EE8F9A8F90B" box="[152,235,1725,1747]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A</figureCitation>
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) that in transverse section (
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<figureCitation id="038A2A71633D1E2F190A4EE8FBF4F90B" box="[612,695,1725,1747]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6B</figureCitation>
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) are arranged concentrically.
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</paragraph>
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<paragraph id="9B0E36F4633D1E2F1BFE4F49F9A8F8E9" blockId="8.[144,759,1820,1903]" box="[144,235,1820,1841]" pageId="8" pageNumber="333">
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<emphasis id="A9C5EAE6633D1E2F1BFE4F49F9A8F8E9" box="[144,235,1820,1841]" italics="true" pageId="8" pageNumber="333">Nucleus</emphasis>
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</paragraph>
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<paragraph id="9B0E36F4633D1E2F1BFE4F6FFAF7FCC6" blockId="8.[144,759,1820,1903]" lastBlockId="8.[806,1421,501,799]" pageId="8" pageNumber="333">
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The nucleus is short [length 1.4 ± 0.1 Mm (
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<emphasis id="A9C5EAE6633D1E2F19C44F6EFBFDF888" box="[682,702,1851,1872]" italics="true" pageId="8" pageNumber="333">N</emphasis>
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= 4), inclusive of an overlap region with the acrosomal complex] and squat (maximum diameter 1.5 ± 0.04 Mm,
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<emphasis id="A9C5EAE6633D1E2F18FD4A40FAE4FDF2" box="[915,935,533,554]" italics="true" pageId="8" pageNumber="333">N</emphasis>
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= 4), with highly electron-dense contents (
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<figureCitation id="038A2A71633D1E2F18404A66FA87FD91" box="[814,964,563,585]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A, C–E</figureCitation>
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). The apical surface is broadly indented to receive the basal portion (0.2 ± 0.05 Mm,
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<emphasis id="A9C5EAE6633D1E2F1E474A07FC7EFDBF" box="[1321,1341,594,615]" italics="true" pageId="8" pageNumber="333">N</emphasis>
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= 4) of the acrosomal vesicle, while posteriorly, shallow indentations act as contact surfaces for the midpiece mitochondria and the anterior edge of the proximal centriole. Irregularly shaped electron-lucent lacunae are present throughout, though largest posteriorly (
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<figureCitation id="038A2A71633D1E2F18404B5CFAEBFCC6" box="[814,936,777,799]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A, D</figureCitation>
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).
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</paragraph>
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<paragraph id="9B0E36F4633D1E2F18484B1CFACFFC86" blockId="8.[806,1421,841,1292]" box="[806,908,841,862]" pageId="8" pageNumber="333">
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<emphasis id="A9C5EAE6633D1E2F18484B1CFACFFC86" box="[806,908,841,862]" italics="true" pageId="8" pageNumber="333">Midpiece</emphasis>
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</paragraph>
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<paragraph id="9B0E36F4633D1E2F18484B3DFD6AFAD3" blockId="8.[806,1421,841,1292]" pageId="8" pageNumber="333">
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The midpiece exhibits four, roughly spherical, mitochondria (showing prominent cristae) in addition to a pair of orthogonally arranged centrioles (
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<figureCitation id="038A2A71633D1E2F1E7E4BF0FA7AFC01" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A, E, F</figureCitation>
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). Each centriole is composed of microtubular triplets set in a dense matrix (
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<figureCitation id="038A2A71633D1E2F1F114BB7FD90FC20" box="[1151,1235,994,1016]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6F</figureCitation>
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). The proximal centriole is loosely connected via a diffuse deposit to a shallow indentation of the nuclear base, and is also attached to the distal centriole (
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<figureCitation id="038A2A71633D1E2F1FFC4C6BFC45FB8C" box="[1170,1286,1086,1108]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A, E</figureCitation>
|
||
). The distal centriole is anchored to the plasma membrane via nine satellite fibres and is continuous with the doublets of the flagellar axoneme (
|
||
<figureCitation id="038A2A71633D1E2F1FCC4CCFFDBAFB68" box="[1186,1273,1178,1200]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A</figureCitation>
|
||
). The entire midpiece region has a length of approximately 0.6– 0.7 Mm and a maximum diameter (of mitochondrial cluster) of 1.6–1.8 Mm.
|
||
</paragraph>
|
||
<paragraph id="9B0E36F4633D1E2F18484D63FAD9FA93" blockId="8.[806,1421,1334,1479]" box="[806,922,1334,1355]" pageId="8" pageNumber="333">
|
||
<emphasis id="A9C5EAE6633D1E2F18484D63FAD9FA93" box="[806,922,1334,1355]" italics="true" pageId="8" pageNumber="333">Flagellum</emphasis>
|
||
</paragraph>
|
||
<paragraph id="9B0E36F4633D1E2F18484D00FDACFA1F" blockId="8.[806,1421,1334,1479]" pageId="8" pageNumber="333">
|
||
The flagellum consists of a 9 + 2 microtubular configuration axoneme, sheathed by the plasma membrane (
|
||
<figureCitation id="038A2A71633D1E2F18174DC7FA93FA70" box="[889,976,1426,1448]" captionStart="Figure 6" captionStartId="14.[144,223,198,217]" captionText="Figure 6. Ultrastructure (TEM) of spermatozoa of Donax (Plebidonax) deltoides. A, longitudinal section (LS) showing acrosomal complex, nucleus, midpiece (with proximal and distal centrioles) and proximal portion of flagellum. Note prominent depression at nuclear apex accommodating base of acrosomal complex. B, transverse section (TS) through acrosomal complex, showing parallel internal layers within basal ring, and homogeneous (less electron-dense) inner material. C, LS of acrosomal complex. Note longitudinally fibrous nature of subacrosomal material. D, TS of nucleus. E, LS of acrosomal complex, nucleus, midpiece and proximal portion of flagellum. F, TS of midpiece showing four mitochondria and triplet structure of distal centriole. Abbreviations: a, acrosomal complex; av, acrosomal vesicle; ax, axoneme; br, basal ring (of acrosomal vesicle contents); dc, distal centriole; f, flagellum; m, mitochondrion of midpiece; n, nucleus; nl, nuclear lacuna; pc, proximal centriole; pm, plasma membrane; sf, satellite fibres; sm, subacrosomal material. ·" pageId="8" pageNumber="333">Fig. 6A</figureCitation>
|
||
). From light microscopic observations, flagellar length is 46 ± 3.0 Mm (
|
||
<emphasis id="A9C5EAE6633D1E2F1FFB4DE7FDEAFA1F" box="[1173,1193,1458,1479]" italics="true" pageId="8" pageNumber="333">N</emphasis>
|
||
= 10).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |