{"created":"2023-07-25T08:12:20.932636+00:00","id":12668,"links":{},"metadata":{"_buckets":{"deposit":"acafac66-83ac-4a50-bc11-d93a8caca22f"},"_deposit":{"created_by":3,"id":"12668","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"12668"},"status":"published"},"_oai":{"id":"oai:ir.kagoshima-u.ac.jp:00012668","sets":["228:262:4853"]},"author_link":["105586","105584","105585"],"item_7_alternative_title_18":{"attribute_name":"別言語のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Fertilization of Mytilus edulis, with Special Reference to the Acrosome Reaction of the Spermatoza"}]},"item_7_biblio_info_5":{"attribute_name":"収録雑誌名","attribute_value_mlt":[{"bibliographicPageEnd":"112","bibliographicPageStart":"105","bibliographicVolumeNumber":"4","bibliographic_titles":[{"bibliographic_title":"鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University"}]}]},"item_7_date_6":{"attribute_name":"作成日","attribute_value_mlt":[{"subitem_date_issued_datetime":"1956-01-30"}]},"item_7_description_4":{"attribute_name":"要約(Abstract)","attribute_value_mlt":[{"subitem_description":"Spawned-out gametes were used throughout the experiments. The observation was made under a phase-contrast microscope. Sperm of Mytilus  edulis undergo acrosome reaction by various stimuli, e.g., contact with eggs or glass surface, addition of egg-sea water, etc. Main morphological changes involved in the reaction are the complete breakdown of the acrosome and the protrusion of a  long  (12p)filament in its place(Figure 1,A,B). \nIn case of fertilization, the sperm react in the acrosomal region when they come into actual contact with the vitelline membrane. It was found that a substance which dissolves the vitelline membrane is released by the breakdown of the acrosome. The filament, though not detected as such, is believed to extend into the egg cytoplasm. A penetrating filament can be observed in case the \nsperm react on the \"vitelline membrane and perivitelline layer preparation\" which is obtained by rupture of the (fertilized or unfertilized) egg. Sperm entrance proceeds  normally when the tail of fertilizing sperm is markedly harmed by a short exposure to hypotonic (30%) sea water immediately after attachment. It is postulated that the fertilizing spermatozoon is passively drawn into the egg with the aid of the filament by a certain dynamical system operating in the egg. The supernumerary spermatozoa also react at the egg surface, the filament likewise penetrating through the egg cortex. In 10-15 seconds after the attachment of the sperm head to the vitelline membrane, the spermatozoa are detached by 4-6  ,u; the filament is clearly visible between the egg and the detached spermatozoa. The detachment does not occur in killed eggs. In a rather dense solution of acrosome substances, not only the vitelline membrane but the perivitelline layer are dissolved away. In such naked eggs, entrance and detachment of sperm occur normally. It may be postulated that the detachment of the supernumerary sperm is also executed with the aid of the acrosome filament by a force produced in the egg protoplasm. The detachment is regarded as a morphological representation of the block to polyspermy. A dynamical system is activated in the egg by a stimulus of  (fertilizing) sperm. The penetration of the acrosome filament is indispensable for the full establishm'  ent of the block to polyspermy. Sperm which have undergone the acrosome reaction before contact with eggs lose their fertilizing capacity (Table 1). The egg has a jelly-hull about 10μ in the thickness. The jelly is supposed to increase the irritability of spermatozoa, to react on the vitelline membrane and thus facilitates fertilization (Table 2).","subitem_description_type":"Other"}]},"item_7_full_name_2":{"attribute_name":"著者よみ","attribute_value_mlt":[{"nameIdentifiers":[{}],"names":[{"name":"ワダ, セイジ"}]}]},"item_7_full_name_3":{"attribute_name":"別言語の著者","attribute_value_mlt":[{"nameIdentifiers":[{}],"names":[{"name":"WADA, Seiji"}]}]},"item_7_publisher_23":{"attribute_name":"公開者・出版者","attribute_value_mlt":[{"subitem_publisher":"鹿児島大学"}]},"item_7_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0453087X","subitem_source_identifier_type":"ISSN"}]},"item_7_source_id_9":{"attribute_name":"NII書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AN00040498","subitem_source_identifier_type":"NCID"}]},"item_7_subject_15":{"attribute_name":"NDC","attribute_value_mlt":[{"subitem_subject":"660","subitem_subject_scheme":"NDC"}]},"item_7_subject_20":{"attribute_name":"NIIsubject","attribute_value_mlt":[{"subitem_subject":"自然科学","subitem_subject_scheme":"Other"}]},"item_7_text_24":{"attribute_name":"公開者よみ","attribute_value_mlt":[{"subitem_text_value":"カゴシマ ダイガク"}]},"item_7_text_25":{"attribute_name":"公開者別名","attribute_value_mlt":[{"subitem_text_value":"Kagoshima University"}]},"item_7_version_type_14":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"和田, 清治"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-10-31"}],"displaytype":"detail","filename":"無題17.pdf","filesize":[{"value":"896.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"無題17.pdf","url":"https://ir.kagoshima-u.ac.jp/record/12668/files/無題17.pdf"},"version_id":"78a5a378-2e9b-464c-a191-dade4e9be40c"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"ムラサキガイの受精、特に精子の尖体反応について","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ムラサキガイの受精、特に精子の尖体反応について"}]},"item_type_id":"7","owner":"3","path":["40","4853"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-07-01"},"publish_date":"2015-07-01","publish_status":"0","recid":"12668","relation_version_is_last":true,"title":["ムラサキガイの受精、特に精子の尖体反応について"],"weko_creator_id":"3","weko_shared_id":3},"updated":"2024-01-30T05:44:33.600444+00:00"}