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Worldwide about one third of all plant species is estimated to be threatened with extinction. Plants are generally under-represented in conservation. However, the global strategy for plant conservation (GSPC) sets forth 16 targets to halt the current and continuing loss of plant diversity within a framework for actions at global, regional, national and local levels. Target 8 of the GSPC directs that at least 75 % of threatened plant species be present in ex situ collections by 2020, but this target is far from being met. By analyzing where gaps in ex situ collections and research exist relative to diversity hotspots of threatened species, it is possible to identify and prioritize action. We undertake a gap analysis of ex situ collection needs in the genus Magnolia, a relatively well-known and valuable genus. Results indicate three main areas of biodiversity (China, Vietnam and Colombia) for the endangered Magnolia taxa. The present paper provides a critical overview of recent conservation activities carried out in the genus Magnolia throughout the world, focusing on genetic diversity analyses of the species

Target 8 of the Global Strategy for Plant Conservation calls for ‘at least 75 per cent of threatened plant species in ex situ collections, preferably in the country of origin, and at least 20 per cent available for recovery and restoration programmes by 2020’.Botanic gardens make a significant contribution to ex situ conservation of wild species with more than a third of plant species represented in botanic gardens collections. These collections are a combination of living collection and seed banked material. Seed banking can provide an efficient form of conservation for wild plant genetic diversity.Information from Botanic Gardens Conservation International's (BGCI) databases (GardenSearch, PlantSearch, ThreatSearch and GlobalTreeSearch) has been analysed as well as survey data to report on global, regional and national seed banking trends.Information from BGCI's databases indicates that there are at least 350 seed banking botanic gardens in 74 countries. In total 56,987 taxa have been banked including more than 9000 taxa that are threatened with extinction. 6881 tree species are stored in ex situ seed bank collections. More than half (3562) of these tree species are single country endemics and represent species from more than 166 countries.This study suggests that institutions are increasingly conserving plant species via seed banking. However the majority of species in collections that have a conservation assessment are not threatened with extinction. This disjunction between species that are threatened and those conserved in seed banks needs to be addressed. Data from BGCI's databases can be used to enable prioritisation of threatened plant species for collection and conservation in seed banks. Further recommendations for botanic gardens involved in seed conservation are presented.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

The Global Strategy for Plant Conservation (GSPC) with its 16 outcome-orientated targets aimed at achieving a series of measurable goals was adopted by the Conference of the Parties to the Convention on Biological Diversity (CBD) at its sixth meeting (COP-6) in 2002. In 2010, at COP-10, these targets were updated, taking into account progress at the time. To date, a number of countries have developed national responses to contribute to the GSPC, including several mega-diverse countries and other plant rich countries and regions. Additionally, a number of global initiatives have been established to promote the implementation of the GSPC. This paper provides an overview of progress at the global level towards the GSPC targets, highlighting actions that have taken place at a supra-national level, as well as providing examples of good practice in national implementation. The GSPC has been widely adopted, particularly by the botanic garden community, and while unlikely to achieve its ultimate goal of halting the loss of plant diversity by 2020, has achieved many successes, not least in allowing and facilitating many individuals and organisations from the botanical community to engage with the CBD and to contribute to the achievement of its objectives, targets and priorities.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Botanic gardens and arboreta are valuable but currently under‐utilized resources in plant health research. Within their vast collections of living plants, gardens play host to expatriate plant species from across the world. These plants offer unique opportunities to study damaging pest and pathogen threats before their introduction into a region where they would be considered invasive aliens. Through these studies, scientists can determine vital information related to these organisms, which can in turn be used to strengthen understanding, contribute to pest risk analysis activities and put in place appropriate quarantine measures or other management programmes. The International Plant Sentinel Network (IPSN) has been working for the last 3 years to provide the support and resources needed for gardens to contribute to such research. The next phase of the IPSN will be to coordinate this research; it will identify, facilitate and provide the already developed tools to contributing gardens. In this way, the IPSN will provide meaningful and valuable information to plant health experts which could help mitigate, or stop altogether, the damaging impacts of new and emerging invasive alien organisms.

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