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Journal article
Seed science and banking networks for plant conservation: the role of the Royal Botanic Gardens, Kew.
Pritchard, Hugh W. ; Sacandé, Moctar ; Kranner, Ilse ; Seaton, Phil ; Ulian, Tiziana
Millennium Seed Bank Project, Plant conservation, Seed science, Seed banking, and Royal Botanic Gardens, Kew
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Journal article
Thermal buffering capacity of the germination phenotype across the environmental envelope of the Cactaceae.
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Journal article
Assessing seed desiccation responses of native trees in the Caribbean
Native trees from the Caribbean were tested for seed desiccation responses, by adapting the “100-seed test” protocol. Ninety-seven seed lots of 91 species were collected in the Dominican Republic and tested for germination immediately after collecting, and after drying and moist storage. Seed desiccation sensitivity was assessed as a continuous... -
Journal article
Rainfall, not soil temperature, will limit the seed germination of dry forest species with climate change
Drylands are predicted to become more arid and saline due to increasing global temperature and drought. Although species from the Caatinga, a Brazilian tropical dry forest, are tolerant to these conditions, the capacity for germination to withstand extreme soil temperature and water deficit associated with climate change remains to be... -
Journal article
Lipid Thermal Fingerprints of Long-term Stored Seeds of Brassicaceae
Thermal fingerprints for seeds of 20 crop wild relatives of Brassicaceae stored for 8 to 44 years at the Plant Germplasm Bank—Universidad Politécnica de Madrid and the Royal Botanic Gardens, Kew’s Millennium Seed Bank—were generated using differential scanning calorimetry (DSC) and analyzed in relation to storage stability. Relatively poor storing... -
Journal article
The Cryobiotechnology of Oaks: An Integration of Approaches for the Long-Term Ex Situ Conservation of Quercus Species
Conventional dry seed storage is unlikely for about one third of all tree species (and nearly half of evergreen rain forest trees) as they probably produce desiccation sensitive (recalcitrant) seeds. Consequently, international ex situ conservation targets for threatened trees will be difficult to achieve without innovation, especially in cryobiotechnology. We...Ballesteros, Daniel ; Pritchard, Hugh W.
recalcitrant seeds, cryopreservation, pollen, embryonic axes, DOE, tree genetic resources, shoot tips, in vitro culture, and dormant buds
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Journal article
Storage of orchid pollinia with varying lipid thermal fingerprints
Orchid pollinia have the potential to make a valuable contribution to current techniques of germplasm storage and assisted reproduction, yet information regarding their preservation and their ability to remain viable over time is currently limited. Dactylorhiza fuchsii and Disa uniflora were used as models for investigating potential techniques for storing...Custodio, Ceci Castilho ; Machado-Neto, Nelson B. ; Singer, Rodrigo B. ; Pritchard, Hugh W. ; Seaton, Philip T. …
Orchidaceae, Conservation , Germplasm, and Pollen germination
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Journal article
Comparative Seed Morphology of Tropical and Temperate Orchid Species with Different Growth Habits
Seed morphology underpins many critical biological and ecological processes, such as seed dormancy and germination, dispersal, and persistence. It is also a valuable taxonomic trait that can provide information about plant evolution and adaptations to different ecological niches. This study characterised and compared various seed morphological traits, i.e., seed and...Diantina, Surya ; McGill, Craig ; Millner, James ; Nadarajan, Jayanthi ; Pritchard, Hugh W. …
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Journal article
Lack of adequate seed supply is a major bottleneck for effective ecosystem restoration in Chile: friendly amendment to Bannister et al. (2018)
We argue that the need for a quality seed supply chain is a major bottleneck for the restoration of Chile's native ecosystems, thus supplementing the list of bottlenecks proposed by Bannister et al. in 2018. Specifically, there is a need for defining seed transfer zones, developing standards and capacities for...León‐Lobos, Pedro ; Bustamante‐Sánchez, Marcela A. ; Nelson, Cara R. ; Alarcón, Diego ; Hasbún, Rodrigo …
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Journal article
Dry architecture: towards the understanding of the variation of longevity in desiccation-tolerant germplasm
Desiccation-tolerant (DT) plant germplasm (i.e. seeds, pollen and spores) survive drying to low moisture contents, when cytoplasm solidifies, forming a glass, and chemical reactions are slowed. DT germplasm may survive for long periods in this state, though inter-specific and intra-specific variation occurs and is not currently explained. Such variability has...Ballesteros, Daniel ; Pritchard, Hugh W. ; Walters, Christina
solidified cytoplasm, seeds, oxidative stress, photosynthetic stress, spores, and lipid crystallization
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Journal article
Seed Survival at Low Temperatures: A Potential Selecting Factor Influencing Community Level Changes in High Altitudes under Climate Change
In alpine ecosystems, imbibed seeds are often exposed to temperatures as low as −35 °C, challenging their survival in the soil. Here, we show that seeds have mechanisms to survive cold climate prevalent in alpine ecosystems and have identified three such mechanisms from existing literature, including two forms of freezing avoidance...Jaganathan, Ganesh K. ; Dalrymple, Sarah E. ; Pritchard, Hugh W.
Boreal, supercooling, freezing tolerance, freezing avoidance, and species migration
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Journal article
Comparative in vitro seed germination and seedling development in tropical and temperate epiphytic and temperate terrestrial orchids
Ex situ conservation of orchid seeds requires the application of modern biotechnology to determine seed quality and to optimise in vitro regeneration. The nutrient requirements for germination and seedling growth in vitro can be species-specific and influenced by life history traits and habitats. Therefore, this study aimed to explore in... -
Journal article
The negative effect of a vertically-transmitted fungal endophyte on seed longevity is stronger than that of ozone transgenerational effect
Seed morphology underpins many critical biological and ecological processes, such as seed dormancy and germination, dispersal, and persistence. It is also a valuable taxonomic trait that can provide information about plant evolution and adaptations to different ecological niches. This study characterised and compared various seed morphological traits, i.e., seed and...Dantas, Barbara F. ; Moura, Magna S. B. ; Gundel, Pedro E. ; McGill, Craig ; Seal, Charlotte E. …
Maternal effect, Lolium multiflorum, Italian ryegrass, and Epichloë occultans
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Journal article
Differential Interpretation of Mountain Temperatures by Endospermic Seeds of Three Endemic Species Impacts the Timing of In Situ Germination
Predicting seed germination in the field is a critical part of anticipating the impact of climate change on the timing of wild species regeneration. We combined thermal time and soil heat sum models of seed germination for three endemic Mediterranean mountain species with endospermic seeds and morphophysiological dormancy: Aquilegia barbaricina,...
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