- -

Morphology, anatomy and germination response of heteromorphic achenes of Anthemis chrysantha J. Gay (Asteraceae), a critically endangered species.

RiuNet: Institutional repository of the Polithecnic University of Valencia

Share/Send to

Cited by

Statistics

Morphology, anatomy and germination response of heteromorphic achenes of Anthemis chrysantha J. Gay (Asteraceae), a critically endangered species.

Show simple item record

Files in this item

dc.contributor.author Aguado, Mayra es_ES
dc.contributor.author Martinez-Sanchez, Juan J. es_ES
dc.contributor.author Reig Armiñana, José es_ES
dc.contributor.author García Breijo, Francisco José es_ES
dc.contributor.author Franco, Jose A. es_ES
dc.contributor.author Vicente, Maria J. es_ES
dc.date.accessioned 2013-05-14T12:01:13Z
dc.date.available 2013-05-14T12:01:13Z
dc.date.issued 2011
dc.identifier.issn 0960-2585
dc.identifier.uri http://hdl.handle.net/10251/28830
dc.description.abstract [EN] This study demonstrates that Anthemis chrysantha, a 'Critically Endangered' annual plant, produces two morphs of achenes: white and dark achenes, which differ in size, mass, anatomy and germination behaviour. Fresh white achenes germinated at all temperatures assayed from 10 to 25 degrees C in both continuous darkness and 12-h photoperiod, ranging between 24% at 25 degrees C in darkness and 89% at 12/20 degrees C in light, whereas fresh dark achenes did not germinate under any temperature or light conditions. To identify differences in dormancy type between the two morphs, germination of dry-stored achenes, and achenes stratified at 5 or 25 degrees C for 2 months were tested in both darkness and light at 5, 15 and 12/20 degrees C for dry-stored and warm-stratified (25 degrees C) achenes; and at 15, 25 and 12/20 degrees C for cold-stratified (5 degrees C) achenes. Of the white achenes, 90% germinated during the cold stratification period. In general, dry storage and warm stratification did not increase germination compared to fresh achenes. However, dark achenes did not germinate under any conditions. Dark achene dormancy was only broken by mechanical scarification or by excising the embryo (germination reached 71%). An anatomical study showed that the mesocarp of dark achenes had no intercellular spaces and was much thicker and stronger than that of white achenes, making the entry of water difficult, and also preventing germination by mechanical restriction. This study demonstrated that dormancy in the dark achenes is likely caused by the thickness of their pericarp, physically impeding germination and hampering imbibition of water. es_ES
dc.description.sponsorship This work was financed by the Consejeria de Agricultura y Agua de la Comunidad Autonoma de la Region de Murcia and the Fundacion Seneca de la Region de Murcia (Project 1186/PI/09). en_EN
dc.language Inglés es_ES
dc.publisher Cambridge University Press es_ES
dc.relation Consejeria de Agricultura y Agua de la Comunidad Autonoma de la Region de Murcia es_ES
dc.relation Fundacion Seneca de la Region de Murcia 1186/PI/09 es_ES
dc.relation.ispartof Seed Science Research es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Anthemis es_ES
dc.subject Endangered species es_ES
dc.subject Heteromorphic fruits es_ES
dc.subject Pericarp structure es_ES
dc.subject Seed dormancy es_ES
dc.subject Seed germination es_ES
dc.subject.classification BIOLOGIA VEGETAL es_ES
dc.subject.classification BOTANICA es_ES
dc.title Morphology, anatomy and germination response of heteromorphic achenes of Anthemis chrysantha J. Gay (Asteraceae), a critically endangered species. es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1017/S0960258511000183
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ecosistemas Agroforestales - Departament d'Ecosistemes Agroforestals es_ES
dc.description.bibliographicCitation Aguado, M.; Martinez-Sanchez, JJ.; Reig Armiñana, J.; García Breijo, FJ.; Franco, JA.; Vicente, MJ. (2011). Morphology, anatomy and germination response of heteromorphic achenes of Anthemis chrysantha J. Gay (Asteraceae), a critically endangered species. Seed Science Research. 21(4):283-294. doi:10.1017/S0960258511000183 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1017/S0960258511000183 es_ES
dc.description.upvformatpinicio 283 es_ES
dc.description.upvformatpfin 294 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 21 es_ES
dc.description.issue 4 es_ES
dc.relation.senia 39039


This item appears in the following Collection(s)

Show simple item record