Data/hora: 26/06/2024 16:08:25

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	23/05/2011	
Data da última atualização: 	23/05/2011	
Autoria: 	FINATTO, T.; SANTOS, K. L.; STEINER, N.; BIZZOCHI, L.; HOLDERBAUM, D.; DUCROQUET, J. P. H. J.; GUERRA, M. P.; NODARI, R. O.	
Afiliação: 	Epagri	
Título: 	Lateacting selfincompatibility in Acca sellowiana Myrtaceae.	
Ano de publicação: 	2011	
Fonte/Imprenta: 	Australian Journal of Botany , v. 59, p. 53-60, 2011.	
Idioma: 	Inglês	
Conteúdo: 	Acca sellowiana (Berg) Burret is a predominantly allogamous species with hermaphrodite&#64258; owers that has barriers to self-fertilisation such as dichogamy by protogyny and self-incompatibility. This study aimed to identify when
self-incompatibility occursin A.sellowiana&#64258; owers submitted to self-pollinations.Pollinations were made using nine known self-incompatible accessions in several treatments including manual cross-pollination, manual self-pollination, no
pollination and natural pollination. Flowers were pollinated and pistils collected at times ranging from 1 to 30 days after pollination (DAP). In both cross- and self-pollinations the fertilisation occurred from 18 DAP and the zygote was visualised at 24 and 26DAP, respectively. The abscissionof theself-pollinated&#64258; owers increasedfrom 26DAPonwards, when signi&#64257;cant differences (P<0.05) were found for the percentage of abscission among self-pollinated and crosspollinated&#64258; owers.At30DAP,72% of self-pollinated&#64258; owerswereabscised.The size of ovules and o ariesofself-pollinated #64258;owersshowednosigni&#64257;cantdifferencefromthoseofnon-pollinated&#64258;owersthroughout30DAP,whilethosefromcrosspollinated&#64258;owersweresigni&#64257;cantlylarger(P<0.05)thantheothertreatmentsfrom22and24DAP,respectively.After40
DAP,therewasnofruitdevelopmentinself-pollinationandnon-pollinationtreatments.Ourstudybringsgreaterclaritytothe
mechanism of self-incompatibility in A. sellowiana, indicating late-acting self-incompatibility occurring through the
rejection/abscission of self-pollinated&#64258;owers precisely after syngamy and zygote formation.
	
Palavras-Chave: 	Feijoa sellowiana; Reproductive biology.	
Categoria do assunto: 	--	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_2022.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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