Generally in gymnosperms pollination and fertilization events are temporally separated and the developmental processes leading the switch from ovule integument into seed coat are still unknown. The single ovule integument of Ginkgo biloba acquires the typical characteristics of the seed coat long before the fertilization event. In this study we investigated whether pollination triggers the transformation of the ovule integument into the seed coat. Transcriptomics and metabolomics analyses performed on ovules just prior and after pollination lead to the identification of changes occurring in Ginkgo ovules during this specific time. A morphological atlas describing the developmental stages of ovule development is presented. The metabolic pathways involved in the lignin biosynthesis and in the production of fatty acids are activated upon pollination suggesting that the ovule integument starts its differentiation into a seed coat before the fertilization. Omics analyses allowed an accurate description of the main changes that occur in Ginkgo ovules during the pollination time frame suggesting the crucial role of the pollen arrival on the progression of ovule development.

The role of pollination in controlling Ginkgo biloba ovule development / G. D’Apice, S. Moschin, F. Araniti, S. Nigris, M. Di Marzo, A. Muto, C. Banfi, L. Bruno, L. Colombo, B. Baldan. - In: NEW PHYTOLOGIST. - ISSN 0028-646X. - (2021 Sep 24). [Epub ahead of print] [10.1111/nph.17753]

The role of pollination in controlling Ginkgo biloba ovule development

F. Araniti;M. Di Marzo;C. Banfi;L. Colombo;
2021

Abstract

Generally in gymnosperms pollination and fertilization events are temporally separated and the developmental processes leading the switch from ovule integument into seed coat are still unknown. The single ovule integument of Ginkgo biloba acquires the typical characteristics of the seed coat long before the fertilization event. In this study we investigated whether pollination triggers the transformation of the ovule integument into the seed coat. Transcriptomics and metabolomics analyses performed on ovules just prior and after pollination lead to the identification of changes occurring in Ginkgo ovules during this specific time. A morphological atlas describing the developmental stages of ovule development is presented. The metabolic pathways involved in the lignin biosynthesis and in the production of fatty acids are activated upon pollination suggesting that the ovule integument starts its differentiation into a seed coat before the fertilization. Omics analyses allowed an accurate description of the main changes that occur in Ginkgo ovules during the pollination time frame suggesting the crucial role of the pollen arrival on the progression of ovule development.
Ginkgo Biloba; gymnosperms; metabolomics; ovule development; ovule morphology; pollination; transcriptomics
Settore AGR/13 - Chimica Agraria
PRIN201719LCOLO_01 - Evolution of molecular networks controlling seed coat differentiation - COLOMBO, LUCIA - PRIN2017 - PRIN bando 2017 - 2019
24-set-2021
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/870512
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