Relationship between flower characteristics and androsporogenesis in wild species and interspecific hybrids of Passiflora

• Published in: Revista brasileira de botânica Vol. 36; no. 2; pp. 125 - 133
• Main Authors: Abreu, Priscilla Patrocínio, Souza, Margarete Magalhães, de Almeida, Alex-Alan Furtado, Lessa, Vilma Ferreira, de Melo, Cláusio Antônio Ferreira
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-06-2013
• Subjects: Biomedical and Life Sciences; Life Sciences; Plant Systematics/Taxonomy/Biogeography; Androspores; Meiosis; Androphytes; Passifloraceae; Passion flowers
• ISSN: 0100-8404; 1806-9959
• DOI: 10.1007/s40415-013-0018-1

This study was carried out aiming to characterize the different stages of androsporogenesis (meiotic) and androgametogenesis (post-meiotic), and analyze the relationship between the lengths of the flower bud and the anther in relation to the development stages of gametophytes in wild species of
Passiflora
of ornamental potential and interspecific hybrids F
1
, to generate subsidies for researches with anther culture and genetic improvement programs. Due to overlaps between the lengths of the buds and anthers and the stages of meiosis I and II, the analyses have allowed only the differentiation of five different classes: prophase I, meiocytes with cells in metaphase I to telophase II, tetrad, androspores, and androphyte I. The use of the anther length was more indicated for differentiation between the androsporogenesis and androgametogenesis than bud length. The occurrence of symmetric binucleate androphyte was considered an anomaly in view of its low occurrence (lower than 7.5 %). There was no association between the different locations of anther sections and developmental stages of androgametogenesis, with overlaps between these variables.