Background and AimsExtended seed longevity in the dry state is basis for ex situ conservation of 'orthodox' seeds. However, even under identical storage conditions there wide variation life-span between species. Here, effects traits environmental at site collection on explored for195 wild species from 71 families environments ranging cold deserts to tropical forests.

Effective seed storage after sourcing (harvesting or purchasing) is critical to restoration practitioners and native producers, as it key maintaining viability. Inadequate can lead a waste of both natural economic resources when seeds poor quality are sown. When working with species unknown behavior, general assumptions be made based on studies related species, standard practices may applied caution; however, an investigation should conducted understand if specific requirements needed for...

Moisture content determination is one of the most important and common assessments made on seeds. It contributes to estimation value a seed lot in commercial settings physiological status seeds research conservation. The method for determining moisture by measuring change weight sample after drying at constant temperature set period time. This, however, renders unusable other purposes, such as viability testing. Here, we review various methods assessing seeds, including non-destructive...

Abstract For many decades, seed germination data have been modelled by probit analysis. In particular, it is the basis of viability equation used, in first instance, to describe decline seeds storage, but then also rate decline, depending on moisture content and temperature storage. The underlying assumption a model that response follows normal distribution, this case, loss ability germinate over time. Probit analysis takes into account binomial error associated with data. Many statistical...

Background and AimsMost priming studies have been conducted on commercial seed lots of unspecified uniformity maturity, subsequent longevity has reported to both increase decrease. Here a lot Digitalis purpurea L. with relatively uniform maturity known history was used analyse the effects in air-dry storage.

Background and AimsAlpine plants are considered one of the groups species most sensitive to direct indirect threats ecosystems caused by land use climate change. Collecting banking seeds plant is recognized as an effective tool for providing propagating material re-establish wild populations habitat repair. However, from cold wet environments have been shown be relatively short lived in storage, therefore successful long-term seed conservation alpine may difficult. Here, life spans 69 lots...

Premise of research. Orchids are among the most enigmatic plant species. Yet Orchidaceae comprises more species at risk extinction than any other family. The collection and storage orchid germplasm—principally seeds associated mycorrhizal fungi but also protocorm-like bodies using encapsulation vitrification techniques—allows for secure ex situ conservation. This article reviews approaches techniques used conservation germplasm, with a focus on seed banking use cryopreservation to improve...

Understanding variation in seed longevity, especially within closely related germplasm, will lead to better understanding of the molecular basis this trait, which is particularly important for genebanks, but also relevant anyone handling seeds. We therefore set out determine relative longevity diverse Indica rice accessions through storage experiments. Since antioxidants are purported play a role storability, antioxidant activity and phenolic content caryopses were determined.Seeds 299...

The effects of different drying methods on desiccation tolerance and longevity in seeds foxglove (Digitalis purpurea L.) were assessed from just prior to mass maturity (when have attained maximum dry weight), at intervals during the post-abscission phase development. Tolerance under seed conservation conditions (15% relative humidity, RH, 15 °C), was acquired close 36 d after flowering (DAF). Increases induced when delayed for 4 by placing a near-saturated atmosphere (approx. 100% RH), or if...

The quality of seed-conservation collections, and hence their value for species reintroduction or restoration, is critically dependent on factors operating in the period between point collection arrival at environmentally controlled processing storage facilities. timing acquisition desiccation tolerance seed longevity air-dry storage, relation to mass maturity time natural dispersal, varies across species. In some wild plant species, continues improve up to, possibly beyond, dispersal....

In obligate seeding species, the germination niche is crucial for colonization and population survival. It a high-risk phase in plant's life cycle, directly regulated by temperature. Seeds germinate over range of temperatures within which there an optimum temperature, with thresholds above below no occurs. We suggest that abrupt changes temperature associated warming climate may cause disconnect between seeds experience able to occur, rendering species vulnerable decline extinction. Using...

Resilience of rice cropping systems to potential global climate change will partly depend on the temperature tolerance pollen germination (PG) and tube growth (PTG). Pollen high temperature-susceptible Oryza glaberrima Steud. (cv. CG14) sativa L. ssp. indica IR64) temperature-tolerant O. aus N22), was assessed a 5.6-45.4 °C gradient system. Mean maximum PG 85% at 27 with 1488 μm PTG 25 °C. The hypothesis that in each grain, minimum requirements (Tn ) limits (Tx for operate independently...

Abstract Probit-based models relating a proportional response variable to temporal explanatory variable, assuming that the times are normally distributed within population, have been used in seed biology for describing rate of loss viability during ageing and progress germination over time environmental signals (e.g. water, temperature). These may be expressed as generalized linear (GLMs) with probit (cumulative normal distribution) link function, and, using GLM fitting procedures current...

The fruit biology of Quercus subgenus has received considerable attention. However, considerably less is known about the (hereafter referred to as seed) Cyclobalanopsis which distributed mainly in tropical and sub-tropical Asia. Consequently, we investigated responses desiccation seeds 11 species from compared these with both China Europe. Similar Quercus, found that all had desiccation-sensitive (recalcitrant) seeds. For 22 species, seed dry masses spanning 0.57 6.41 g, there were wide...

Seed viability monitoring, usually through a germination test, is key aspect of genebank management; low result triggers the regeneration an accession in order to ensure that genetic diversity conserved and available for distribution. However, regular monitoring large collections costly terms seeds, labour other resources. Genebanks differ how they conduct their collect, manage store data are generated. In this article, we propose alternatives current norm conducting initial test soon after...

Seed longevity, a fundamental plant trait for ex situ conservation and persistence in the soil of many species, varies across populations generations that experience different climates. This study investigates extent to which differences seed longevity are due genetic and/or modified by adaptive responses environmental changes. Seeds two wild Silene vulgaris from alpine (wA) lowland (wL) locations seeds originating their cultivation common garden (cA1, cL1, cA2 cL2) were exposed controlled...

Abstract Understanding the relative longevity of different seed lots, perhaps species or genotypes, but also following production under environments using cultivation methods, post-harvest treatments, is relevant to anyone concerned with retention lot viability and vigour during storage. However, scientists over years have used conditions assess longevity, as well variables measure ‘longevity.’ Here, we give some backgrounds how two standard protocols, an open closed system respectively,...

Seeds from ten terrestrial orchid species, nine the south-west Australian biodiversity hotspot (Caladenia arenicola, Caladenia flava, huegelii, Diuris laxiflora, Microtis media ssp. media, Pterostylis recurva, sanguinea, Thelymitra crinita and macrophylla) one south-east Australia (Diuris fragrantissima), were placed into experimental storage to assess their relative longevity likely optimal conditions for long-term conservation seed banking. all species desiccation tolerant, germinating...

Background and AimsUsing two parental clones of outcrossing Trifolium ambiguum as a potential model system, we examined how during seed development the maternal parent, number seeds per pod, position within pod inflorescence influenced individual fresh weight, dry water content, germinability, desiccation tolerance, hardseededness, subsequent longevity seeds.