The aim of PlantNetwork’s Target 8 project is to involve botanic and other collections-led gardensthroughout Britain (and eventually Ireland also) to cultivate nationally threatened vascular ...plantspecies. In this way, if each garden were to ‘adopt’ 2–3 threatened species then the networkof British botanic gardens could collectively cultivate almost all of the 204 threatened speciesfound in Britain, and therefore fulfill the requirements of Target 8 of the Global Strategy for PlantConservation. However, before such a project could start, baseline information on the number anddiversity of threatened plants in British ex situ collections was required. Along with this, speciesdossiers compiling cultivation and conservation details were considered necessary for the successof the project. Furthermore, practical details of the project such as collection and representationneeded to be discussed with curators. This paper describes the background, survey work andpractical aspects of the project.
We examine the distribution of Dracaena cinnabari, the Socotran Dragon’s Blood Tree, an endangered species endemic to the island of Socotra (Yemen)—and we propose an accessibility approach to its ...conservation, taking the proximity of local communities and land users into account. Using the present occurrence of D. cinnabari, we applied a machine learning algorithm (random forest classifier) to estimate the potential distribution of the species across the island (overall validation accuracy of 0.91) based on available climatic and physiographic parameters. In parallel, we used an accessibility methodology to generate a map of the energy cost of accessing potential areas from the villages. This community-focused accessibility map, combined with the potential distribution map of Dracaena cinnabari, could contribute to decision-making processes related to long-term ecological restoration and reforestation activities. With our case study, we wish to emphasize that user-focused efforts and the implementation of sustainable land practices should play key roles in conserving endangered tree species.
We report on how a long-term study of the reproductive biology of the Critically Endangered Schiedea adamantis (Caryophyllaceae), one of Hawai‘i's rarest plant species, was leveraged for conservation ...purposes. Our major goals were to provide seeds with the greatest genetic variation possible for reintroduction and to ensure that both female and hermaphroditic plants of this wind-pollinated species were reintroduced in a manner that maximized both outcrossing and seed production. Schiedea adamantis was one of the first Hawaiian plant species listed under the Endangered Species Act (USA). The species has been studied intensively to test hypotheses addressing the evolution of breeding systems. Information on outcrossing levels and the extent of inbreeding depression was integrated into ongoing reintroduction efforts. Population size peaked in 1994, when 267 flowering individuals were found on Lē‘ahi (Diamond Head Crater). By 2016 only 17 flowering individuals were present, with drought and invasive species being possible causes of this decline. Reintroduction attempts in 1998 using genetically diverse seeds were unsuccessful because of drought and a lack of sufficient supplemental irrigation. Additional reintroduction attempts in 2012 and 2014 were more successful because of increased supplemental irrigation. Plants used in reintroductions represent genotypes long since absent in the natural population, and may contain the genetic variability essential for evolutionary responses to climate change and the spread of invasive species. The destruction of many plants reintroduced in 2015 and 2016 by a fire in March 2016 highlights the need for additional restoration areas at Lē‘ahi and elsewhere, and storage of seeds for future use.
The Global Strategy for Plant Conservation (GSPC), with its 16 plant conservation targets, was originally adopted by the Parties to the Convention on Biological Diversity (CBD) in 2002. It was ...updated and revised in 2010, with targets set to be achieved by 2020. The GSPC's targets are output oriented, specific, and measurable. They address the conservation needs of wild plants as well as those of cultivated crops, pastures, and forests. Although it is generally acknowledged that greater progress has been made in conserving threatened plants than would have been made without the GSPC, there is a continued lack of mainstreaming plant conservation at the national level and a lack of comprehensive information on which plants are threatened and where. With the GSPC reaching the end of its second phase in 2020, it is important to consider how plant conservation can enhance its visibility and generate support in the future. The 2030 Sustainable Development Agenda and associated Sustainable Development Goals (SDGs) were developed to succeed the Millennium Development Goals and were adopted in 2015 by the international community through the United Nations. It is expected that the SDGs will shape the actions taken by governments in the future. This paper reviews and highlights the contribution that plant conservation can make in achieving the SDGs. The SDG framework provides a helpful point of reference to demonstrate the fundamental importance of plants for the planet, and importantly, if plant conservation is not achieved, then the achievement of these goals is put at risk, suggesting that the integration and mainstreaming of biodiversity conservation, ecological restoration of degraded ecosystems, and plant protection in particular, are of fundamental importance to the achievement of sustainability on the planet.
Shading is one of the management practices for preventing the damage or injury of plant seedlings during extreme weather and climate events, such as very high temperatures and heat stress. In this ...study, we investigated the effects of different shading conditions on the photosynthetic characteristics of the endangered plant Horsfieldia hainanensis in Guangxi, China. The H. hainanensis seedlings in this study underwent five shading treatments, including 20% (L1), 40% (L2), 60% (L3), 80% (L4), and 100% (control) of full sunlight. The net growth of their diameter and height, and photosynthetic gas exchange parameters including their photosynthesis rate (Pn), transpiration rate (Tr), intercellular COsub.2 concentration (Ci), and water use efficiency (WUE) were measured for the examined seedlings. The OJIP curve and 820 nm light absorption curve, and the osmotic substances and products of membrane lipid peroxidation were employed to assess photosynthetic capacity, identify the factors constraining photosynthetic carbon assimilation, and investigate the mechanisms influencing photosystem II (PSII) and photosystem I (PSI) in the seedlings under shade stress. The results showed that the seedlings in the L2 treatments had the highest net growth and Pn, the best photosynthetic performance, and the best coordination between PSII and PSI. The net photosynthesis (Pn) levels exhibited a declining trend in the following order: L2 > L3 > L4 > L1. In the L1 treatment, non-stomatal factors emerged as the primary determinant affecting the Pn of the seedlings. The performance index (potential) of PSII, representing the conservation of absorbed photon energy to intersystem electron acceptor reduction (PIABS and ΔI/I0) of the seedlings, decreased in the order of L2 > L3 > L4 > L1. The photosystem performance and the coordination between PSII and PSI (Φ(PSI/PSII)) of the seedlings decreased in the order of L2 > L1 > L3 > L4. Under the low and moderate shading stresses (L1–L3), more serious damages occurred in PSII than in PSI, including on the donor side of PSII and in the electron transfer from Qsub.B to the acceptor side of PSI. In contrast, more considerable injury occurred in PSI than in PSII under the stress of the heavy shading treatment (L4). Considering the alterations in their leaf osmotic regulatory substances and membrane lipid peroxidation products, our findings indicate that the L2 treatment was the most conducive to the growth of the H. hainanensis seedlings. In contrast, the L1 treatment subjected H. hainanensis seedlings to the most significant stress, resulting in substantial damage to their growth and photosynthetic mechanisms. Our research provides a scientific insight into and a practical guide for the selection of an appropriate light intensity for the conservation and cultivation of endangered plant species, such as H. hainanensis.
Medicinal plants are globally valuable sources of herbal products, and they are disappearing at a high speed. This article reviews global trends, developments and prospects for the strategies and ...methodologies concerning the conservation and sustainable use of medicinal plant resources to provide a reliable reference for the conservation and sustainable use of medicinal plants. We emphasized that both conservation strategies (e.g. in situ and ex situ conservation and cultivation practices) and resource management (e.g. good agricultural practices and sustainable use solutions) should be adequately taken into account for the sustainable use of medicinal plant resources. We recommend that biotechnical approaches (e.g. tissue culture, micropropagation, synthetic seed technology, and molecular marker-based approaches) should be applied to improve yield and modify the potency of medicinal plants.
The collection and conservation of chickpea and lentil germplasm has great importance due to their role as a staple food for millions of people. Nowadays, the largest chickpea collection, 41.2% of ...the total accessions, is held by ICRISAT, while the main lentil collection is stored by ICARDA. The main fraction of both collections is constituted by Indian landraces. In recent decades, several efforts have been made to integrate all genebanks into a global conservation system of plant genetic resources. The release of informatics platforms allowed the creation of virtual genebanks, which are powerful tools routinely consulted by germplasm users. The information available for the chickpea and lentil accessions included in the Genesys and EURISCO platforms has been taken into consideration in this mini review. This review also presents and discusses the strengths and drawbacks of the worldwide collections of both species emerging from the analysis of data obtained by enquiring these two platforms. The availability of core collections is of great utility for germplasm users, while the lack of origin and biological status for a significant fraction of accessions are the main drawbacks. Moreover, this review highlights the necessity of sharing as much as possible of the non-omic and omic characterization data.
Plants are a hyperdiverse clade that plays a key role in maintaining ecological and evolutionary processes as well as human livelihoods. Biases, gaps and uncertainties in plant occurrence information ...remain a central problem in ecology and conservation, but these limitations remain largely unassessed globally. In this synthesis, we propose a conceptual framework for analysing gaps in information coverage, information uncertainties and biases in these metrics along taxonomic, geographical and temporal dimensions, and apply it to all c. 370 000 species of land plants. To this end, we integrated 120 million point‐occurrence records with independent databases on plant taxonomy, distributions and conservation status. We find that different data limitations are prevalent in each dimension. Different metrics of information coverage and uncertainty are largely uncorrelated, and reducing taxonomic, spatial or temporal uncertainty by filtering out records would usually come at great costs to coverage. In light of these multidimensional data limitations, we discuss prospects for global plant ecological and biogeographical research, monitoring and conservation and outline critical next steps towards more effective information usage and mobilisation. Our study provides an empirical baseline for evaluating and improving global floristic knowledge, along with a conceptual framework that can be applied to study other hyperdiverse clades.
Although both international conservation policymakers and conservation geneticists have the shared goal of halting the loss of biodiversity, currently these communities have very little interaction. ...Because the targets of international conservation policy focus very little on the conservation of genetic diversity in wild species, they have received little attention from the plant conservaton genetics community. Conservation policymakers should more explicitly include the conservation of genetic diversity of wild species in future targets to ensure that this important aspect of biodiversity is not overlooked for the majority of species on earth and to attain more buy-in from the plant conservation genetics community; I highlight specific ways in which policymakers may more explicitly include genetic diversity in international policy targets. For their part, conservation geneticists need to conduct work that will advance the big-picture goals of conservation policy; here, I discuss specific actions that plant conservation geneticists can take, such as measuring the proportion of genetic diversity that is protected, designing experiments in such a way to measure genetic erosion, and developing protocols to increase the efficiency of ex situ collection efforts. By working together, plant conservation geneticists and conservation policymakers will more effectively accomplish the shared goal of halting the loss of plant biodiversity.
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