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Article: Pollen structure, tetrad cohesion and pollen-connecting threads in Pseuduvaria (Annonaceae)

TitlePollen structure, tetrad cohesion and pollen-connecting threads in Pseuduvaria (Annonaceae)
Authors
KeywordsAcalymmate tetrads
Crosswall cohesion
Non-sporopollenin threads
Palynology
Pollen masses
Systematics
Taxonomy
Viscin threads
Issue Date2003
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=0024-4074
Citation
Botanical Journal Of The Linnean Society, 2003, v. 143 n. 1, p. 69-78 How to Cite?
AbstractThe structure of the pollen of 42 species of Pseuduvaria (Annonaceae) is described. The pollen is consistently inaperturate, isopolar and radially symmetrical. Four basic patterns of exine sculpturing are identified: rugulate, verrucate, scabrate and psilate. The exine stratification of one representative species, P. macrocarpa, is shown to be entirely ectexinal. The ectexine consists of a discontinuous outer tectal layer, a columellar infratectal layer, and an inner lamellar foliated foot layer; the intine is very thin and fibrillar. The pollen is invariably released as acalymmate tetrads, in which the tectum is absent from the proximal walls. The individual pollen grains within the tetrads are connected by crosswall cohesion, involving both exine and intine; this form of cohesion has not hitherto been reported in the Annonaceae. In addition, pollen grains of neighbouring tetrads are connected in two different ways, viz. short exine connections and non-sporopollenin pollen-connecting threads. Neither of these cohesion mechanisms has previously been reported for the genus. The function of the various forms of cohesion between pollen grains and tetrads in Pseuduvaria is discussed as a mechanism to enhance the efficiency of pollination by enabling the fertilization of multiple ovules following a single pollinator visit. © 2003 The Linnean Society of London.
Persistent Identifierhttp://hdl.handle.net/10722/73346
ISSN
2015 Impact Factor: 2.523
2015 SCImago Journal Rankings: 1.138
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSu, YCFen_HK
dc.contributor.authorSaunders, RMKen_HK
dc.date.accessioned2010-09-06T06:50:25Z-
dc.date.available2010-09-06T06:50:25Z-
dc.date.issued2003en_HK
dc.identifier.citationBotanical Journal Of The Linnean Society, 2003, v. 143 n. 1, p. 69-78en_HK
dc.identifier.issn0024-4074en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73346-
dc.description.abstractThe structure of the pollen of 42 species of Pseuduvaria (Annonaceae) is described. The pollen is consistently inaperturate, isopolar and radially symmetrical. Four basic patterns of exine sculpturing are identified: rugulate, verrucate, scabrate and psilate. The exine stratification of one representative species, P. macrocarpa, is shown to be entirely ectexinal. The ectexine consists of a discontinuous outer tectal layer, a columellar infratectal layer, and an inner lamellar foliated foot layer; the intine is very thin and fibrillar. The pollen is invariably released as acalymmate tetrads, in which the tectum is absent from the proximal walls. The individual pollen grains within the tetrads are connected by crosswall cohesion, involving both exine and intine; this form of cohesion has not hitherto been reported in the Annonaceae. In addition, pollen grains of neighbouring tetrads are connected in two different ways, viz. short exine connections and non-sporopollenin pollen-connecting threads. Neither of these cohesion mechanisms has previously been reported for the genus. The function of the various forms of cohesion between pollen grains and tetrads in Pseuduvaria is discussed as a mechanism to enhance the efficiency of pollination by enabling the fertilization of multiple ovules following a single pollinator visit. © 2003 The Linnean Society of London.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=0024-4074en_HK
dc.relation.ispartofBotanical Journal of the Linnean Societyen_HK
dc.rightsBotanical Journal of the Linnean Society. Copyright © Blackwell Publishing Ltd.en_HK
dc.subjectAcalymmate tetradsen_HK
dc.subjectCrosswall cohesionen_HK
dc.subjectNon-sporopollenin threadsen_HK
dc.subjectPalynologyen_HK
dc.subjectPollen massesen_HK
dc.subjectSystematicsen_HK
dc.subjectTaxonomyen_HK
dc.subjectViscin threadsen_HK
dc.titlePollen structure, tetrad cohesion and pollen-connecting threads in Pseuduvaria (Annonaceae)en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0024-4074&volume=143&spage=69&epage=78&date=2003&atitle=Pollen+structure,+tetrad+cohesion,+and+pollen-connecting+threads+in+Pseuduvaria+(Annonaceae)en_HK
dc.identifier.emailSaunders, RMK: saunders@hkucc.hku.hken_HK
dc.identifier.authoritySaunders, RMK=rp00774en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1046/j.1095-8339.2003.00204.xen_HK
dc.identifier.scopuseid_2-s2.0-0141453400en_HK
dc.identifier.hkuros86135en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0141453400&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume143en_HK
dc.identifier.issue1en_HK
dc.identifier.spage69en_HK
dc.identifier.epage78en_HK
dc.identifier.isiWOS:000187573700007-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridSu, YCF=7404456219en_HK
dc.identifier.scopusauthoridSaunders, RMK=35345489600en_HK

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