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Maternal temperature during seed maturation affects seed germination and timing of bud set in seedlings of European black poplar

Abstract

The maternal temperature during seed development can significantly affect seed dormancy, germination and seedling performance. While the response of germination and seedling phenology to maternal temperatures has been well studied for annuals and conifers, very few studies focus on deciduous trees. To understand the responses of seedlings to variation in maternal temperature during seed maturation, we assessed the germination, bud phenology (bud burst, bud set) and height of full sib families in a common garden. We performed three controlled crosses between three different pairs of genotypes of European black poplar (Populus nigra) to achieve full sib families in three experiments in warm (+10 °C) and cold (control) maternal environments during crossing and seed maturation. Warmer (+10 °C) maternal temperatures decreased the seed germination success. The seedlings from the warmer maternal environment also displayed later bud burst and earlier bud set, but only in one out of the three crossings (Proven ♀ x Horrues ♂). Our results indicate that the maternal environment can considerably impact on seed germination and the phenological responses of even two-year old seedlings suggesting the existence of a memory of maternal temperature during seed maturation. The seedlings resulting from the colder maternal environment grew taller than those from the warmer environment during the first, but not second, growing season. Our results further our understanding of the responses of deciduous forest trees to rapid climate change, but more research is needed to better understand the mechanisms behind the observed effects of maternal warming.

Details

Aantal pagina's 10
Volume 410
Tijdschrift nummer 126-135
Pagina's (van-tot) 126-135
Type A1: Web of Science-artikel
Categorie Onderzoek
Tijdschrift Forest Ecology and Management
Issns 0378-1127
Uitgeverij Elsevier Science
Taal Engels
Bibtex

@misc{f1f6b28f-9f3a-463e-b072-61bdbadc8acc,
title = "Maternal temperature during seed maturation affects seed germination and timing of bud set in seedlings of European black poplar",
abstract = "Abstract

The maternal temperature during seed development can significantly affect seed dormancy, germination and seedling performance. While the response of germination and seedling phenology to maternal temperatures has been well studied for annuals and conifers, very few studies focus on deciduous trees. To understand the responses of seedlings to variation in maternal temperature during seed maturation, we assessed the germination, bud phenology (bud burst, bud set) and height of full sib families in a common garden. We performed three controlled crosses between three different pairs of genotypes of European black poplar (Populus nigra) to achieve full sib families in three experiments in warm (+10 °C) and cold (control) maternal environments during crossing and seed maturation. Warmer (+10 °C) maternal temperatures decreased the seed germination success. The seedlings from the warmer maternal environment also displayed later bud burst and earlier bud set, but only in one out of the three crossings (Proven ♀ x Horrues ♂). Our results indicate that the maternal environment can considerably impact on seed germination and the phenological responses of even two-year old seedlings suggesting the existence of a memory of maternal temperature during seed maturation. The seedlings resulting from the colder maternal environment grew taller than those from the warmer environment during the first, but not second, growing season. Our results further our understanding of the responses of deciduous forest trees to rapid climate change, but more research is needed to better understand the mechanisms behind the observed effects of maternal warming.",
author = "Sumitra Dewan and Kristine Vander Mijnsbrugge and Pieter De Frenne and Marijke Steenackers and Boudewijn Michiels and Kris Verheyen",
year = "2018",
month = feb,
day = "15",
doi = "https://doi.org/10.1016/j.foreco.2018.01.002",
language = "Nederlands",
publisher = "Elsevier Science",
address = "België,
type = "Other"
}

Auteurs

Sumitra Dewan
Kristine Vander Mijnsbrugge
Pieter De Frenne
Marijke Steenackers
Boudewijn Michiels
Kris Verheyen