Seed Germination Ecophysiology of Acacia dealbata Link and Acacia mearnsii De Wild.: Two Invasive Species in the Mediterranean Basin

Acacia dealbata and A. mearnsii are two invasive species found in coastal, mountain, and riparian Mediterranean habitats. Seed biology and germination traits are important drivers of the competitive performance of plants and may significantly contribute to biolo...

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Autores principales:	Ludovica Dessì, Lina Podda, Giuseppe Brundu, Vanessa Lozano, Antoine Carrouée, Elizabete Marchante, Hélia Marchante, Yohan Petit, Marco Porceddu, Gianluigi Bacchetta
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	germination capacity invasive alien species exotic trees physical dormancy seed ecology Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/642e919a5eba40d29932bf6810055fa8
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spelling	oai:doaj.org-article:642e919a5eba40d29932bf6810055fa82021-11-11T19:21:34ZSeed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin10.3390/su1321115882071-1050https://doaj.org/article/642e919a5eba40d29932bf6810055fa82021-10-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/21/11588https://doaj.org/toc/2071-1050<i>Acacia dealbata</i> and <i>A. mearnsii</i> are two invasive species found in coastal, mountain, and riparian Mediterranean habitats. Seed biology and germination traits are important drivers of the competitive performance of plants and may significantly contribute to biological invasions. The seeds of <i>Acacia</i> s.l. have physical dormancy due to an impermeable epidermal layer. The aim of this study was to assess the germination capacity of scarified and non-scarified seeds of <i>A. dealbata</i> and <i>A. mearnsii</i> from different areas of the Mediterranean Basin. To test the seed imbibition capacity, the increase in mass was evaluated. Non-scarified seeds were tested at 15, 20, and 25 °C in light conditions. Scarified seeds were tested at 5, 10, 15, 20, and 25 °C and 25/10 °C in light and dark conditions. Scarified seeds increased in mass more than non-scarified seeds. Both species showed a higher germination capacity at 25 °C in non-scarified seeds; <i>A. dealbata</i> reached a germination maximum of 55%, while <i>A. mearnsii</i> reached 40%, showing a difference among these populations. Scarified seeds of both species reached germination percentages >95% at all temperatures except at 5 °C in dark conditions. Scarification was necessary to break dormancy and promote germination. The present study provides new knowledge about the seed ecology and germinative behaviour of the two <i>Acacia</i> species under different pre-treatment, temperature, and photoperiod regimes, contributing to the understanding of their invasive behaviour.Ludovica DessìLina PoddaGiuseppe BrunduVanessa LozanoAntoine CarrouéeElizabete MarchanteHélia MarchanteYohan PetitMarco PorcedduGianluigi BacchettaMDPI AGarticlegermination capacityinvasive alien speciesexotic treesphysical dormancyseed ecologyEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 11588, p 11588 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	germination capacity invasive alien species exotic trees physical dormancy seed ecology Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	germination capacity invasive alien species exotic trees physical dormancy seed ecology Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Ludovica Dessì Lina Podda Giuseppe Brundu Vanessa Lozano Antoine Carrouée Elizabete Marchante Hélia Marchante Yohan Petit Marco Porceddu Gianluigi Bacchetta Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin
description	<i>Acacia dealbata</i> and <i>A. mearnsii</i> are two invasive species found in coastal, mountain, and riparian Mediterranean habitats. Seed biology and germination traits are important drivers of the competitive performance of plants and may significantly contribute to biological invasions. The seeds of <i>Acacia</i> s.l. have physical dormancy due to an impermeable epidermal layer. The aim of this study was to assess the germination capacity of scarified and non-scarified seeds of <i>A. dealbata</i> and <i>A. mearnsii</i> from different areas of the Mediterranean Basin. To test the seed imbibition capacity, the increase in mass was evaluated. Non-scarified seeds were tested at 15, 20, and 25 °C in light conditions. Scarified seeds were tested at 5, 10, 15, 20, and 25 °C and 25/10 °C in light and dark conditions. Scarified seeds increased in mass more than non-scarified seeds. Both species showed a higher germination capacity at 25 °C in non-scarified seeds; <i>A. dealbata</i> reached a germination maximum of 55%, while <i>A. mearnsii</i> reached 40%, showing a difference among these populations. Scarified seeds of both species reached germination percentages >95% at all temperatures except at 5 °C in dark conditions. Scarification was necessary to break dormancy and promote germination. The present study provides new knowledge about the seed ecology and germinative behaviour of the two <i>Acacia</i> species under different pre-treatment, temperature, and photoperiod regimes, contributing to the understanding of their invasive behaviour.
format	article
author	Ludovica Dessì Lina Podda Giuseppe Brundu Vanessa Lozano Antoine Carrouée Elizabete Marchante Hélia Marchante Yohan Petit Marco Porceddu Gianluigi Bacchetta
author_facet	Ludovica Dessì Lina Podda Giuseppe Brundu Vanessa Lozano Antoine Carrouée Elizabete Marchante Hélia Marchante Yohan Petit Marco Porceddu Gianluigi Bacchetta
author_sort	Ludovica Dessì
title	Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin
title_short	Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin
title_full	Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin
title_fullStr	Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin
title_full_unstemmed	Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin
title_sort	seed germination ecophysiology of <i>acacia dealbata</i> link and <i>acacia mearnsii</i> de wild.: two invasive species in the mediterranean basin
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/642e919a5eba40d29932bf6810055fa8
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Seed Germination Ecophysiology of <i>Acacia dealbata</i> Link and <i>Acacia mearnsii</i> De Wild.: Two Invasive Species in the Mediterranean Basin

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