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Authors Leperlier, C; Riviere, JNE; Lacroix, S; Fock-Bastide, I
Author Full Name Leperlier, Cedric; Riviere, Jean-Noel Eric; Lacroix, Stephane; Fock-Bastide, Isabelle
Title Overcoming germination barriers in four native Malvaceae shrub species of Reunion island to improve restoration in arid habitats
Source GLOBAL ECOLOGY AND CONSERVATION
Language English
Document Type Article
Author Keywords Conservation; Germination; Malvaceae; Physical dormancy; Restoration
Keywords Plus PHYSICAL DORMANCY BREAK; SEED-GERMINATION; LA REUNION; ESTABLISHMENT SUCCESS; INVASIVE GRASS; CLIMATE-CHANGE; BIODIVERSITY; SAVANNA; LIGHT; TREE
Abstract Islands are well-known to house an incredible biodiversity, higher level of threatened species and extinctions than mainlands. Because of human activities and climate change, these endangered regions required advanced conservation and restoration strategies. In this study, we investigated seed germination ecology of four native Malvaceae species (Dombeya acutangula, Dombeya populnea, Ruizia cordata and Thespesia populneoides) of degraded dry lowlands of Reunion Island. We measured seed imbibition, investigated the dormancy class of seeds, determined light requirements for germination and identified treatments to improve germination of these species. For this purpose, germination tests were performed over 32 days and two photoperiods (12 h/12 h or 0 h/24 h), by using seeds treated with H2O2, gibberellic acid and smoke water. Mechanical and chemical scarifications as well as heat treatment were also carried out. Germination percentages were analyzed by fitting generalized linear models (GLMs) with a logit link function. For the four species, a significant mass increase is detected for scarified seeds after a week imbibition (>60% mass increase). Germination percentages of seeds treated with H2O2, GA(3) and smoke water were not significantly different from control seed. On the contrary, scarified seeds exhibited significantly higher germination percentages than control seeds. In addition, germination speed was also significantly higher for scarified seeds. These results are congruent with a physical dormancy phenomenon of seeds of the four Malvaceae shrubs. In addition, no particular light requirement was observed for germination. Artificial methods to break dormancy and stimulate germination described in this study could improve establishment success in arid habitats. (C) 2019 The Authors. Published by Elsevier B.V.
Author Address [Leperlier, Cedric; Fock-Bastide, Isabelle] Univ La Reunion, UMR PVBMT, F-97410 St Pierre, Reunion, France; [Leperlier, Cedric; Riviere, Jean-Noel Eric] CIRAD, UMR PVBMT, F-97410 St Pierre, Reunion, France; [Leperlier, Cedric; Lacroix, Stephane] SCEA Pepiniere Theatre, F-97434 St Gilles Les Bains, Reunion, France
Reprint Address Fock-Bastide, I (corresponding author), Univ La Reunion, UMR PVBMT, F-97410 St Pierre, Reunion, France.
E-mail Address isabelle.fock-bastide@univ-reunion.fr
Funding Agency and Grant Number European Union: European regional development fund (ERDF); Conseil Regional de La ReunionEuropean Commission; Centre de Cooperation Internationale en Recherche Agronomique pour le Developpement (CIRAD); ANRT (Association Nationale de la Recherche et de la Technologie)French National Research Agency (ANR); Ministere de l'Enseignement Superieur, de la Recherche et de l'Innovation, France
Funding Text This researchwas co-funded by the European Union: European regional development fund (ERDF), by the Conseil Regional de La Reunion and by the Centre de Cooperation Internationale en Recherche Agronomique pour le Developpement (CIRAD). The first author appreciates the financial support from the ANRT (Association Nationale de la Recherche et de la Technologie), Ministere de l'Enseignement Superieur, de la Recherche et de l'Innovation, France. The authors greatly acknowledge the Plant Protection Platform (3P, IBISA). We thank Antoine FRANCK (CIRAD, La Reunion) for providing us with the seed photographs. We also thank the personnel of Pepiniere du The atre for assisting us in harvesting seeds used in this study.
Publisher ELSEVIER
Publisher City AMSTERDAM
Publisher Address RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN 2351-9894
29-Character Source Abbreviation GLOB ECOL CONSERV
ISO Source Abbreviation Glob. Ecol. Conserv.
Publication Date MAR
Year Published 2020
Volume 21
Article Number e00855
Digital Object Identifier (DOI) 10.1016/j.gecco.2019.e00855
Page Count 11
Web of Science Category Biodiversity Conservation; Ecology
Subject Category Biodiversity & Conservation; Environmental Sciences & Ecology
Document Delivery Number KR7RT
Unique Article Identifier WOS:000517814100054
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