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- W2338383822 abstract "The leaf axil in Passiflora L. (Passifloraceae) bears a complex structure: a tendril and one or more flowers seem to arise from the same growing point. In addition, vegetative bud is also present. There are many different interpretations for the origin of the tendril in this group, ranging from modifications of flowers to side shoots. Also, the ontogeny of these structures is often understood as a single meristem which subdivides into a bud complex, comprising the tendril and flower meristems. Recently, the expression of the LEAFY ortholog was demonstrated in the axillary, tendril and floral meristems of two Passiflora species. In Arabidopsis and many angiosperms, this gene is responsible for the shift between vegetative and reproductive phase. Therefore, the present work aimed to describe, in detail, the ontogeny of the bud complex in Passiflora species belonging to different subgenera, including different life stages. The expression of the ortholog of APETALA1, a gene typically related to floral meristem identity and sepal/petal specification was also assessed. As results, we propose a different interpretation for the ontogeny of the bud complex, based on the production of bracts and their associated meristems by the original axillary meristem, which then turns into the tendril meristem. We also demonstrate that expression of AP1 is much broader than that of the Arabidopsis model, and possibly have many other functions related to cell indeterminacy." @default.
- W2338383822 created "2016-06-24" @default.
- W2338383822 creator A5043292449 @default.
- W2338383822 date "2015-01-01" @default.
- W2338383822 modified "2023-09-24" @default.
- W2338383822 title "Ontogênese do complexo de gemas em Passiflora L. (Passifloraceae) e expressão de PasAP1, ortólogo de APETALA1 Ontogenesis of the bud complex in Passiflora L. (Passifloraceae) and expression of PasAP1, APETALA1 ortholog" @default.
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