A protocol to determine seed storage behaviour

This publications provides an approach by which conservationists can determine whether or not long-term seed storage is feasible for a particular species, i.e. whether or not that species shows orthodox seed storage behaviour. It provides advice on the implementation of the protocol, examples of ways in which the results from seed storage studies could be misinterpreted due to confounding factors, as well as several alternative approaches for estimating seed storage behaviour prior to carrying out actual investigations with the seeds. In particular, the latter section introduces the concept of a multicriteria approach for estimating seed storage behaviour. It is intended to be used along with the Compendium (see IPGRI Handbooks for Genebanks No.4 - Seed Storage behaviour: a Compendium); these two publications are essentially complementary. The overall aim of the protocol is to guide and encourage further work in this area of seed physiology (particularly for species on which relatively less work has been done to date)m with the objective to expanding on/up-dating the type of species-specific data compiled in the compendium

Seed storage behavior: a compendium

This handbook provides an introduction to seed storage physiology for those responsible for plant genetic conservation and a selective summary of the literature on seed survival in storage, and thus on seed storage behaviour, for over 7000 species from 251 families. Part IA summarizes progress in our understanding of seed physiology in relation to seed storage for genetic conservation in the past 17 years since the publication of The Storage of Recalcitrant Seeds: Achievements and Possible Approaches by King and Roberts (1979), and particularly the various problems that may result in the misclassification of seed storage behaviour. Part IB provides a compendium of information on seed survival during storage and attempts to classify plant species into the several categories of seed storage behaviour. You can search the data on seed storage behavio

Chiral restoration effects on the shear viscosity of a pion gas

We investigate the shear viscosity of a pion gas in relativistic kinetic theory, using the Nambu-Jona-Lasinio model to construct the pion mass and the pi-pi interaction at finite temperature. Whereas at low temperatures the scattering properties and, hence, the viscosity are in agreement with lowest-order chiral perturbation theory, we find strong medium modifications in the crossover region. Here the system is strongly coupled and the scattering lengths diverge, similarly as for ultra-cold Fermi gases at a Feshbach resonance. As a consequence, the ratio eta/s is found to be strongly reduced as compared to calculations without medium-modified masses and scattering amplitudes. However, the quantitative results are very sensitive to the details of the applied approximations.Comment: 15 pages, 12 figures; v2: extended discussions of the dressed sigma propagator and the low-temperature limit, typos corrected, accepted versio

Handbook of Seed Technology for Genebanks: Volume I: principles and methodology

This first volume of seed technology for genebanks deals with many of the principles of seed testing which need to be understood when monitoring the viability of seed accessions maintained in genebanks. It is the second in a general series of genebank handbooks. (Reprinted 1989

Handbook of seed technology for genebanks: Volume II: compendium of specific germination information and test recommendation

This second volume on seed technology for genebanks provides general approaches, detailed information, guidance and, when available, prescriptions for removing dormancy and germinating the seeds. It is the third in a general series of genebank handbooks. (Reprinted 1989