Classification of seed storage behaviour of 67 Amazonian tree species

Lima, Mdjvj; Hong, T. D.; Arruda, Yêda Maria Boaventura Corrêa; Mendes, A. M. S.; Ellis, R. H.

doi:10.15258/sst.2014.42.3.06

Cited by 17 publications

(8 citation statements)

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“…This method accurately predicted desiccation tolerance for small seeds with relatively low moisture content, and desiccation sensitivity for large seeds with high moisture content, but could not distinguish between desiccation responses for seeds in the middle of the range for both characters. Similar results were obtained using this model by Ellis et al (2007) and Lima et al (2014). Daws et al (2006) developed a model utilising dry seed weight and seed coat ratio to derive a value for the probability of desiccation sensitivity (P D-S ).…”

Section: Introductionsupporting

confidence: 62%

“…As in previous studies, the relationships observed here between storage behaviour and fresh seed moisture content, dry weight and P D-S only allowed reliable prediction of desiccation response at one or both ends of the range for each variable (e.g. Daws et al 2006;Ellis et al 2007;Lima et al (2014); the difficulty in predicting storage responses for species falling within the middle of those ranges remained. While other characteristics, such as tree habit and fleshy fruit, were shown to significantly increase the likelihood of desiccation sensitivity, these still did not make reliable predictors for the purpose of seed banking.…”

Section: In Minitab V16supporting

confidence: 47%

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Assessing the storage potential of Australian rainforest seeds: a decision-making key to aid rapid conservation

et al. 2021

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Seed banking of rainforest species is hindered by lack of knowledge as to which species are tolerant of desiccation and freezing. We assessed 313 Australian rainforest species for seed banking suitability by comparing the germination percentage of fresh seeds to seeds dried at 15% RH and seeds stored at −20 °C after drying. We then compared desiccation responses to environmental, habit, fruit and seed characteristics to identify the most useful predictors of desiccation sensitivity. Of 162 species with ≥ 50% initial germination, 22% were sensitive to desiccation, 64% were tolerant and 10% were partially tolerant; the responses of 4% were uncertain. Of 107 desiccation tolerant species tested for response to freezing, 24% were freezing sensitive or short-lived in storage at −20 °C. Median values for fresh seed moisture content (SMC), oven dry weight (DW) and the likelihood of desiccation sensitivity (PD-S) were significantly greater for desiccation sensitive than desiccation tolerant seeds. Ninety-four to 97% of seeds with SMC < 29%, DW < 20 mg or PD-S < 0.01 were desiccation tolerant. Ordinal logistic regression of desiccation response against environmental, habit, fruit and seed characteristics indicated that the likelihood of desiccation sensitivity was significantly increased by a tree habit, fleshy fruit, increasing fresh SMC and increasing PD-S. The responses observed in this study were combined with earlier studies to develop a simple decision key to aid prediction of desiccation responses in untested rainforest species.

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Section: Introductionsupporting

confidence: 62%

Section: In Minitab V16supporting

confidence: 47%

Assessing the storage potential of Australian rainforest seeds: a decision-making key to aid rapid conservation

et al. 2021

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“…studies of tropical seed storage behavior did not identify any species with seed freeze sensitivity (Pritchard et al, 2004;Daws et al, 2005) or only identified one species (Lima et al, 2014). Seven of 53 species from South Florida, United States, were classified as freeze sensitive, but based on predictive models using single accessions, desiccated and frozen only 3 and 7 days, respectively (Salazar et al, 2018).…”

Section: Freeze-sensitive Seed Storage Behavior In the Tropics-previousmentioning

confidence: 98%

“…Relatively few species have been identified with intermediate seed storage behavior, comprising <2% of any compendium of over 800 species Tweddle et al, 2003;, and account for only 0.6% of the 24,242 species with designated storage behavior in the Millennium Seed Bank's Seed Information Database (Royal Botanic Gardens Kew, 2019b). However, in studies of tropical and subtropical floras, intermediate seed storage behavior may comprise up to 22% of species classified (Pritchard et al, 2004;Ellis et al, 2007;Lima et al, 2014;Salazar et al, 2018). Studies that identify multiple species with temperature-intermediate seeds are less common (but see Hong and Ellis, 1995;Lin, 1996;Ellis et al, 2007), but there are also a few studies that identify single species with temperature-intermediate seeds (e.g., Ellis et al, 1991a;Crane et al, 2003;Magistrali et al, 2013;Zhang et al, 2014).…”

mentioning

confidence: 99%

Seed freeze sensitivity and ex situ longevity of 295 species in the native Hawaiian flora

Chau

Chambers²,

Weisenberger

et al. 2019

American J of Botany

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Conservation of plant biodiversity requires in situ protection of native habitat and ex situ conservation methods to secure collections of propagules for restoration and reintroduction. Integrating both in situ and ex situ strategies is essential in Hawai'i, where over half the native flora is at risk of endangerment or extinction due to threats such as alien invasive species, habitat modification, climate change, and other human impacts (Sakai et al., 2002; Fortini et al., 2013; Weisenberger and Keir, 2014b; IUCN [International Union for the Conservation of Nature], 2018). The recent commencement of widespread in situ recovery efforts across the state has not yet stemmed rapid decline within remaining populations of many endemic species (IUCN, 2018). In fact, the number of federally listed Threatened and Endangered (T&E) plants in Hawai'i has increased by 56% over the last decade (USFWS, 2018). Accordingly, maintaining viable propagules as an ex situ "genetic safety net" until appropriate habitat can be protected is often the only way to prevent further extinctions (Havens et al., 2004). Restoration outplantings are often experimental, testing site suitability and mixing source material to determine which combinations are most effective (Guerrant and Kaye, 2007). One limiting factor biodiversity managers need to overcome to successfully restore habitats and populations is obtaining enough propagules to maximize genetic diversity. Thus, managers are increasingly dependent on ex situ germplasm storage to accumulate collections from small fragmented subpopulations, so that plant material collected from maternal founders over multiple seasons can be recombined

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“…Rare plant species growing in tropical and subtropical habitats often have unknown storage behaviour and few seeds available for experimentation. Determining seed storage behaviour is essential for developing plant biodiversity conservation strategies as seed bank collections may not be possible for all species (Lima et al , 2014).…”

Section: Introductionmentioning

confidence: 99%

Seed germination of 53 species from the globally critically imperiled pine rockland ecosystem of South Florida, USA: effects of storage, phylogeny and life-history traits

et al. 2018

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Germination studies at the community level are crucial for understanding and predicting changes in species distribution patterns, particularly in endangered plant communities. We investigated the effects of dry (11–25% relative humidity) and freezing (–18°C) storage conditions, phylogeny and plant life-history traits (life-form, life-span, microhabitat and seed dispersal mode) on seed germination percentage (GP) and time to reach 50% germination (T50) of 53 species native to pine rocklands in South Florida, USA, a globally critically imperiled ecosystem. Most species we studied (68%) withstood dry and freezing storage conditions and thus ex situ seed banking can assist their long-term conservation. Bayesian mixed effect models revealed that there was a significant phylogenetic signal in GP and T50 across species. Life-history covariates did not explain significant additional variation in GP in models controlling for the phylogenetic relationships among species. T50 differed among species with contrasting dispersal modes, with animal-dispersed seeds exhibiting more delayed germination than wind-dispersed or unassisted seeds. Differential germination responses across species with different seed dispersal modes have implications for potential shifts in species composition under disturbance and climate change. Thus, knowledge of species-relatedness and some life-history traits such as seed dispersal mode can significantly assist management decisions regarding seed storage and conservation of subtropical endangered plants.

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Classification of seed storage behaviour of 67 Amazonian tree species

Cited by 17 publications

References 0 publications

Assessing the storage potential of Australian rainforest seeds: a decision-making key to aid rapid conservation

Assessing the storage potential of Australian rainforest seeds: a decision-making key to aid rapid conservation

Seed freeze sensitivity and ex situ longevity of 295 species in the native Hawaiian flora

Seed germination of 53 species from the globally critically imperiled pine rockland ecosystem of South Florida, USA: effects of storage, phylogeny and life-history traits

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