Development of pollinated and unpollinated ovules in Ginkgo biloba: unravelling the role of pollen in ovule tissue maturation.

Autor:	Muto A; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata of Rende (Cosenza), Italy., Talarico E; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata of Rende (Cosenza), Italy., D'Apice G; Botanical Garden, University of Padova, 25123 Padova, Italy.; Department of Biology, University of Padova, 35121 Padova, Italy., Di Marzo M; Department of Biosciences, University of Milano, 20133 Milano, Italy., Moschin S; Botanical Garden, University of Padova, 25123 Padova, Italy.; Department of Biology, University of Padova, 35121 Padova, Italy., Nigris S; Botanical Garden, University of Padova, 25123 Padova, Italy.; Department of Biology, University of Padova, 35121 Padova, Italy., Babolin N; Department of Biosciences, University of Milano, 20133 Milano, Italy., Greco E; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata of Rende (Cosenza), Italy., Araniti F; Department of Agricultural and Environmental Sciences - Production, Landscape, Agroenergy (Di.S.A.A.), University of Milano, 20133 Milano, Italy., Chiappetta A; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata of Rende (Cosenza), Italy., Colombo L; Department of Biosciences, University of Milano, 20133 Milano, Italy., Baldan B; Botanical Garden, University of Padova, 25123 Padova, Italy.; Department of Biology, University of Padova, 35121 Padova, Italy., Bruno L; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata of Rende (Cosenza), Italy.
Jazyk:	angličtina
Zdroj:	Journal of experimental botany [J Exp Bot] 2024 Jun 07; Vol. 75 (11), pp. 3351-3367.
DOI:	10.1093/jxb/erae102
Abstrakt:	In gymnosperms such as Ginkgo biloba, the arrival of pollen plays a key role in ovule development, before fertilization occurs. Accordingly, G. biloba female plants geographically isolated from male plants abort all their ovules after the pollination drop emission, which is the event that allows the ovule to capture pollen grains. To decipher the mechanism induced by pollination required to avoid ovule senescence and then abortion, we compared the transcriptomes of pollinated and unpollinated ovules at three time points after the end of the emission of pollination drop. Transcriptomic and in situ expression analyses revealed that several key genes involved in programmed cell death such as senescence and apoptosis, DNA replication, and cell cycle regulation were differentially expressed in unpollinated ovules compared to pollinated ovules. We provide evidence that the pollen captured by the pollination drop affects auxin local accumulation and might cause deregulation of key genes required for the ovule's programmed cell death, activating both the cell cycle regulation and DNA replication genes. (© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
Databáze:	MEDLINE
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