{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T09:11:55Z","timestamp":1773047515860,"version":"3.50.1"},"reference-count":27,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2001,3,23]],"date-time":"2001-03-23T00:00:00Z","timestamp":985305600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microscopy Res &amp;amp; Technique"],"published-print":{"date-parts":[[2001,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Although having a similar developmental pattern, the pineal gland of tropical birds varies in shape, size, and morphology, probably more than any other part of the avian brain. Following the old classification, we noted a solid follicular (transitional) type of the pineal gland in the nocturnal bird <jats:italic>Athene brama,<\/jats:italic> and a tubulo\u2010follicular and elongated tubular types of pineal gland in diurnal birds <jats:italic>Perdicula asiatica<\/jats:italic> and <jats:italic>Euroloncha punchulata,<\/jats:italic> respectively. Detailed light (LM) and electron microscopic (EM) studies of the pineal gland from these tropical birds revealed the presence of a well\u2010developed, functionally active gland in nocturnal birds (contrary to reports available until now). Unlike diurnal birds, the nocturnal bird <jats:italic>A. brama<\/jats:italic> has no deep pineal in the posterior region (near the habenular commissure). It could be that the deep encephalic receptors have no\/fewer functions in nocturnal birds. At present, we were unable to define the significance of deep pineal in these tropical avian species. A notable difference in the proximodistal orientation of intrapineal follicles and parenchymatous cells was noted among these birds due to different habitats. Ultrastructurally, the pinealocytes exhibited great similarities in terms of secretory organelles, except for the presence of some peculiar membranous structure in <jats:italic>E. punchulata<\/jats:italic>. The pinealocytes have rudimentary photoreceptive features (e.g., outer segment) along with cytoplasmic organelles for secretory activity, suggesting both photosensory and photosecretory types of function. The present study also suggests more heterogenicity in pineal gland morphology (cellular architecture) among diurnal birds than the nocturnal one. Microsc. Res. Tech. 53:25\u201332, 2001. \u00a9 2001 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/jemt.1065","type":"journal-article","created":{"date-parts":[[2002,8,25]],"date-time":"2002-08-25T17:30:12Z","timestamp":1030296612000},"page":"25-32","source":"Crossref","is-referenced-by-count":10,"title":["Comparative view of pineal gland morphology of nocturnal and diurnal birds of tropical origin"],"prefix":"10.1002","volume":"53","author":[{"given":"C.","family":"Haldar","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.S.","family":"Bishnupuri","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2001,3,23]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"396","article-title":"Some aspects of vascularization and chemical histology of the pineal glands in Gallus","volume":"118","author":"Beattie CW","year":"1966","journal-title":"Anat Anz"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5320(69)90003-3"},{"key":"e_1_2_1_4_1","first-page":"1","article-title":"Avian pineal gland, an enigma","volume":"12","author":"Chakravarty S","year":"1980","journal-title":"Indian Biologists"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/0016-6480(89)90128-7"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/9780470715376.ch5"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1006\/gcen.1996.6845"},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1679\/aohc1950.29.271"},{"key":"e_1_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/0016-6480(90)90216-9"},{"key":"e_1_2_1_10_1","first-page":"1","article-title":"The avian pineal organ: with special reference to tropical avian pineal organ","volume":"32","author":"Ghosh M","year":"1994","journal-title":"PAVO"},{"key":"e_1_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1556\/ABiol.52.2001.1.1"},{"key":"e_1_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.1076\/brhm.30.5.508.1400"},{"key":"e_1_2_1_13_1","first-page":"1","article-title":"Pineal morphology of the Indian jungle bush quail, P. asiatica: a light and electromicroscopic study","volume":"61","author":"Haldar C","year":"1991","journal-title":"Proc Natl Acad Sci USA"},{"key":"e_1_2_1_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/1097-010X(20000701)287:2<145::AID-JEZ4>3.0.CO;2-K"},{"key":"e_1_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.1080\/09291019309360194"},{"key":"e_1_2_1_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0940-9602(11)80520-0"},{"key":"e_1_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.1080\/09291019509360327"},{"key":"e_1_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00406266"},{"key":"e_1_2_1_19_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00335683"},{"key":"e_1_2_1_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0079-6123(08)63447-0"},{"key":"e_1_2_1_21_1","first-page":"363","article-title":"Comparative and experimental studies on the pineal structure and cytology of passeriformes birds","volume":"56","author":"Quay WB","year":"1963","journal-title":"Riv Biol"},{"key":"e_1_2_1_22_1","first-page":"371","article-title":"Pineal ultrastructure in Melopsittacus undulatus with particular regard to cell types and functions","volume":"61","author":"Quay WB","year":"1968","journal-title":"Riv Biol"},{"key":"e_1_2_1_23_1","doi-asserted-by":"publisher","DOI":"10.1093\/icb\/10.2.217"},{"key":"e_1_2_1_24_1","series-title":"Lehrbuch der vergleichenden miknoskopischen Anatomic der mirbeltiere oppel A","first-page":"1","author":"Studnicka FK","year":"1905"},{"key":"e_1_2_1_25_1","doi-asserted-by":"publisher","DOI":"10.1016\/0006-8993(93)90169-N"},{"key":"e_1_2_1_26_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00307048"},{"key":"e_1_2_1_27_1","first-page":"91","article-title":"The pineal gland and synchronization of reproductive cycles with variation of environmental climatic condition with special reference to temperature pineal","volume":"1","author":"Vivien\u2010Roels B","year":"1983","journal-title":"Res Rev"},{"key":"e_1_2_1_28_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-81525-6_7"}],"container-title":["Microscopy Research and Technique"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fjemt.1065","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/jemt.1065","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T19:09:26Z","timestamp":1760641766000},"score":1,"resource":{"primary":{"URL":"https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/10.1002\/jemt.1065"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2001,3,23]]},"references-count":27,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2001,4]]}},"alternative-id":["10.1002\/jemt.1065"],"URL":"https:\/\/doi.org\/10.1002\/jemt.1065","archive":["Portico"],"relation":{},"ISSN":["1059-910X","1097-0029"],"issn-type":[{"value":"1059-910X","type":"print"},{"value":"1097-0029","type":"electronic"}],"subject":[],"published":{"date-parts":[[2001,3,23]]}}}