scholarly journals Handing off iron to the next generation: how does it get into seeds and what for?

2020 ◽  
Vol 477 (1) ◽  
pp. 259-274
Author(s):  
Stéphane Mari ◽  
Christophe Bailly ◽  
Sébastien Thomine
Keyword(s):  
Seed Quality ◽  
Current Knowledge ◽  
Next Generation ◽  
Plant Seeds ◽  
Long Term Storage ◽  
Fe Content ◽  
New Generation ◽  
Fe Storage ◽  
Term Storage

To ensure the success of the new generation in annual species, the mother plant transfers a large proportion of the nutrients it has accumulated during its vegetative life to the next generation through its seeds. Iron (Fe) is required in large amounts to provide the energy and redox power to sustain seedling growth. However, free Fe is highly toxic as it leads to the generation of reactive oxygen species. Fe must, therefore, be tightly bound to chelating molecules to allow seed survival for long periods of time without oxidative damage. Nevertheless, when conditions are favorable, the seed's Fe stores have to be readily remobilized to achieve the transition toward active photosynthesis before the seedling becomes able to take up Fe from the environment. This is likely critical for the vigor of the young plant. Seeds constitute an important dietary source of Fe, which is essential for human health. Understanding the mechanisms of Fe storage in seeds is a key to improve their Fe content and availability in order to fight Fe deficiency. Seed longevity, germination efficiency and seedling vigor are also important traits that may be affected by the chemical form under which Fe is stored. In this review, we summarize the current knowledge on seed Fe loading during development, long-term storage and remobilization upon germination. We highlight how this knowledge may help seed Fe biofortification and discuss how Fe storage may affect the seed quality and germination efficiency.

12. Experience of long-term storage of diverse plant seeds by cryostorage in permafrost soils in Yakutsk

Cryobiology ◽  
2010 ◽  
Vol 61 (3) ◽  
pp. 365
Author(s):  
E.S. Khlebnyy ◽  
B.I. Ivanov ◽  
B.M. Kerschengolts ◽  
A.N. Zhuravskaja ◽  
M.M. Shashurin
Keyword(s):  
Plant Seeds ◽  
Long Term Storage ◽  
Permafrost Soils ◽  
Term Storage ◽  
Diverse Plant

scholarly journals Long Term Storage of Dry versus Frozen RNA for Next Generation Molecular Studies

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e111827 ◽  
Author(s):  
Eric Seelenfreund ◽  
William A. Robinson ◽  
Carol M. Amato ◽  
Aik-Choon Tan ◽  
Jihye Kim ◽  
...  
Keyword(s):  
Next Generation ◽  
Long Term Storage ◽  
Molecular Studies ◽  
Term Storage

Response of Longleaf Pine Seeds to Storage Conditions and Pregermination Treatments

1993 ◽  
Vol 17 (4) ◽  
pp. 174-179 ◽  
Author(s):  
James P. Barnett ◽  
John P. Jones
Keyword(s):  
Seed Quality ◽  
Longleaf Pine ◽  
Pinus Palustris ◽  
Storage Conditions ◽  
Operational Conditions ◽  
Long Term Storage ◽  
Processing And Storage ◽  
And Storage ◽  
Term Storage

Abstract Although longleaf pine (Pinus palustris Mill.) seeds are considered the most susceptible of the southern pines to damage during collection, processing, and storage, results of these studies show that high seed quality can be assured for periods up to 20 yr through proper handling and storing techniques. Recommendations for long-term storage include drying seeds to moisture contents of 10% or less and storing at subfreezing temperatures, preferably near 0°F. Reevaluation of stratification treatments applied under operational conditions indicates that the soaking in water that is necessary for seed imbibition reduces total germination in an amount proportional to the length of the soak. Stratification is not recommended except under very controlled conditions. South. J. Appl. For. 17(4):174-179.

scholarly journals Chemical treatment of papaya seeds aiming at long-term storage and control of damping off

Revista CERES ◽  
2014 ◽  
Vol 61 (3) ◽  
pp. 384-391
Author(s):  
Silvia de Carvalho Campos Botelho ◽  
Silvaldo Felipe da Silveira ◽  
Roberto Ferreira da Silva ◽  
Alexandre Pio Viana
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Seed Vigor ◽  
Control Group ◽  
Damping Off ◽  
Effective Measure ◽  
Long Term Storage ◽  
Papaya Seeds ◽  
Term Storage

Damping off is a nursery disease of great economic importance in papaya and seed treatment may be an effective measure to control. The aim of this work was to evaluate the quality of papaya seeds treated with fungicides and stored under two environmental and packaging conditions. Additionally, the efficiency of fungicide treatments in the control of damping-off caused by Rhizoctonia solani was evaluated. Papaya seeds were treated with the fungicides Captan, Tolylfluanid and the mixture Tolylfluanid + Captan (all commercial wettable powder formulations). Seeds of the control group were not treated. The seeds were stored for nine months in two conditions: packed in aluminum coated paper and kept at 7 ± 1ºC and in permeable kraft paper and kept in non-controlled environment. At the beginning of the storage and every three months the seed quality (germination and vigor tests), emergence rate index, height, dry mass and damping of plants in pre and post-emergence (in contaminated substrate and mycelia-free substrate) were analyzed. Both storage conditions as well as the fungicide treatments preserved the germination and seed vigor. In the infested substrate, seedling emergence was favored by fungicides, but in post-emergence, fungicides alone did not control the damping off caused by R. solani. Symptoms of damping off were not observed in the clean substrate. The results showed that the fungicide treatments may be used to pretreat papaya seed for long-term storage and commercialization.

scholarly journals SEED QUALITY EVALUATION IN THE COLLECTION OF CYAMOPSIS TETRAGONOLOBA AFTER LONG¬TERM STORAGE UNDER UNCONTROLLED CONDITIONS

2020 ◽  
Vol 180 (4) ◽  
pp. 48-58
Author(s):  
N. V. Rakovskaya ◽  
O. N. Zabegayeva ◽  
E. A. Dzyubenko
Keyword(s):  
Seed Quality ◽  
Seed Viability ◽  
Growing Season ◽  
Cyamopsis Tetragonoloba ◽  
Monthly Temperature ◽  
Germination Energy ◽  
Long Term Storage ◽  
Seed Hardness ◽  
Term Storage

Background. Guar or clusterbean (Cyamopsis tetragonoloba (L.) Taub.) is an annual leguminous plant cultivated for feed, food and industrial purposes. Its seed endosperm is used to extract guar gum, so the guar genetic resources stored in the VIR collection are of strategic importance for the import substitution policy in Russia in the context of their prospective introduction into cultivation in the country’s southern areas. Most of the guar accessions had been preserved by VIR for 40 years or more, so the task was to assess their germination rates and restore their viability. In the process of screening, seed quality parameters of the accessions were examined and analyzed.Materials and methods. VIR’s collection of C. tetragonoloba, initiated by N. I. Vavilov, now contains 111 accessions. Percentage seed viability, germination energy and seed hardness were evaluated in the Long-Term Storage Laboratory for 50 accessions reproduced in 2018 and for 263 older reproductions of 89 guar accessions. In total, 313 seed samples reproduced across 18 different years were analyzed. Statistica 10 software was used to perform a single-factor analysis of variance and find out how germination energy, seed viability and seed hardness correlated with the age of seeds, mean monthly temperature and mean rainfall during the growing season.Results and discussion. After more than 40 years of storage, the guar accessions did not entirely lost their viability under laboratory and field conditions. Very high positive correlations were found for their percentage viability and germination energy with the mean monthly temperature in the year of reproduction. A weak positive correlation was observed between seed hardness and the year of reproduction. Correlations between seed viability and rainfall during the growing season were weak, with a weak negative correlation between seed hardness and rainfall. The viability level of 30-year-old seeds was 50%, so guar may be regarded as belonging to the group of macrobiotic plants.

Germination of pretreated Scots pine seeds after long-term storage

2003 ◽  
Vol 33 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Anu Hilli ◽  
Eila Tillman-Sutela ◽  
Anneli Kauppi
Keyword(s):  
Scots Pine ◽  
Seed Quality ◽  
Seed Orchard ◽  
Forest Stand ◽  
Plant Production ◽  
Long Term Storage ◽  
The Impact ◽  
Germination Indices ◽  
Term Storage

Improvement of seed quality by pretreatments is indispensable in current mechanized plant production. Pretreated seeds are usually sown immediately, but in some cases they also have to be stored. The aim of our work was to study the changes in germination indices of pretreated Scots pine (Pinus sylvestris L.) seeds and the impact of the incubation temperature on germination after long-term storage. Pretreated and nontreated Scots pine seeds of three forest stands and a seed orchard were stored for about 10 years at the temperatures of 2°C and –18°C. The changes in germination indices were studied using germination tests and radiography. The germination indices of both pretreated and nontreated seeds were impaired during long-term storage. In general the changes were greater in cold than in frozen storage. Decline of the germination indices was more obvious in pretreated seed orchard than in forest stand seeds. The germination indices of forest stand seeds, whether pretreated or not, was preserved equally well in cold storage, while in orchard seeds germination indices prevailed better in nontreated seed batches. Forest stand seeds incubated at 10°C maintained their germination indices better than seeds incubated at 5°C, while in orchard seeds the effect was not as obvious.

Modelling of Moisture Movement in Wood during Outdoor Storage

2001 ◽  
Vol 6 (2) ◽  
pp. 3-14 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
I. Juodeikienė ◽  
A. Kajalavičius
Keyword(s):  
Experimental Data ◽  
Finite Difference ◽  
Climatic Conditions ◽  
Two Dimensional ◽  
Moisture Movement ◽  
Finite Difference Technique ◽  
Long Term Storage ◽  
Space Formulation ◽  
Term Storage

A model of moisture movement in wood is presented in this paper in a two-dimensional-in-space formulation. The finite-difference technique has been used in order to obtain the solution of the problem. The model was applied to predict the moisture content in sawn boards from pine during long term storage under outdoor climatic conditions. The satisfactory agreement between the numerical solution and experimental data was obtained.

Trehalose: a cryoprotectant that enhances recovery and preserves function of human pancreatic islets after long-term storage

Diabetes ◽  
1997 ◽  
Vol 46 (3) ◽  
pp. 519-523 ◽  
Author(s):  
G. M. Beattie ◽  
J. H. Crowe ◽  
A. D. Lopez ◽  
V. Cirulli ◽  
C. Ricordi ◽  
...  
Keyword(s):  
Pancreatic Islets ◽  
Human Pancreatic Islets ◽  
Long Term Storage ◽  
Term Storage
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