Title:	Stigma structure and receptivity in papaya (Carica papaya L.).
Authors:	FERREIRA, J. A. B. LEDO, C. A. da S. SOUZA, F. V. D. CONCEIÇÃO, J. Q. ROSSI, M. L. SOUZA, E. H.
Affiliation:	JACQUELINE A.B. FERREIRA; CARLOS ALBERTO DA SILVA LEDO, CNPMF; FERNANDA VIDIGAL DUARTE SOUZA, CNPMF; JOSIMARE Q. CONCEIÇÃO; MONICA L. ROSSI; EVERTON H. SOUZA.
Date Issued:	2021
Citation:	Anais da Academia Brasileira de Ciências, v.93, n.1, e20190605 [2021?].
Description:	The objective of this study was to evaluate the stigma morphoanatomy and receptivity in ten promising papaya accessions, to expand knowledge useful for genetic improvement of the culture. The morphoanatomy was analyzed by light and scanning electron microscopy, and the stigma receptivity was investigated by application of hydrogen peroxide and α-naphthyl-acetate with fast blue B salt, in pre-anthesis, anthesis and post-anthesis. The papaya accessions presented dry stigma surface, presence of one to six erect stigmatic lobes, with structures joined to the upper base of the style and covered with numerous elongated unicellular tubular papillae, distributed on both faces of the epidermis. The morphoanatomy had a similar pattern in all the accessions, differing only in the timing of floral development. The stigma receptivity in some accessions occurred even before floral opening, continuing with greater intensity in anthesis and post-anthesis. Pre-anthesis is the stage least propitious for controlled hybridizations due to the weak or absent stigmatic receptivity. The results obtained provide information on the floral stage that is most propitious for fertilization, as well as supporting future investigations of the botanical morphology of the species.
Thesagro:	Mamão
ISSN:	1678-2690
DOI:	10.1590/0001-3765202120190605
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMF)