The study presented in this thesis focuses on the distribution of the hormone auxin in the female reproductive tissues during ovule development in Ginkgo biloba. Ovules were collected from a centuries-old specimen located at the Botanical Garden of the University of Padua on March 19 and 26, 2025, corresponding to the pre-pollination stage. Samples were fixed, embedded in Technovit® resin, sectioned using a microtome, and observed under a microscope after staining with toluidine blue. Morphological analysis and the detailed description of the tissues composing the ovule subsequently allowed, through the use of an immunolocalization technique with a specific antibody, the investigation of auxin distribution across the different tissues at this specific developmental stage. The results contribute to a broader study aimed at understanding, also from an evolutionary perspective, the role of this hormone in the developmental dynamics of reproductive structures in the most ancestral spermatophytes.
Lo studio, presentato in questo elaborato, si concentra sulla distribuzione dell’ormone auxina nei tessuti riproduttivi femminili durante lo sviluppo dell’ovulo in Ginkgo biloba. Gli ovuli sono stati raccolti da un esemplare pluricentenario presente presso l’Orto Botanico dell’Università di Padova nelle date del 19 e 26 marzo 2025, corrispondenti allo stadio di pre-impollinazione. I campioni sono stati fissati, inclusi in resina Technovit®, sezionati al microtomo e osservati al microscopio dopo colorazione con blu di toluidina. L’analisi morfologica e la descrizione dettagliata dei tessuti che compongono l’ovulo hanno permesso successivamente di comprendere, utilizzando la tecnica di immuno-localizzazione con un anticorpo specifico, la distribuzione dell’ormone auxina nei diversi tessuti a questo specifico stadio. I risultati si collocano in uno studio più ampio per comprendere, anche dal punto di vista evolutivo, il ruolo di questo ormone nelle dinamiche di sviluppo delle strutture riproduttive nelle spermatofite più ancestrali.
Immuno-localizzazione dell’ormone auxina in ovuli di Ginkgo biloba L.
DI VITO, SARA
2025/2026
Abstract
The study presented in this thesis focuses on the distribution of the hormone auxin in the female reproductive tissues during ovule development in Ginkgo biloba. Ovules were collected from a centuries-old specimen located at the Botanical Garden of the University of Padua on March 19 and 26, 2025, corresponding to the pre-pollination stage. Samples were fixed, embedded in Technovit® resin, sectioned using a microtome, and observed under a microscope after staining with toluidine blue. Morphological analysis and the detailed description of the tissues composing the ovule subsequently allowed, through the use of an immunolocalization technique with a specific antibody, the investigation of auxin distribution across the different tissues at this specific developmental stage. The results contribute to a broader study aimed at understanding, also from an evolutionary perspective, the role of this hormone in the developmental dynamics of reproductive structures in the most ancestral spermatophytes.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/104223