Seed quality as cause for differences in longevity behaviour after seed pretreatment in wheat (Triticum aestivumL.)

1994 ◽  
Vol 4 (3) ◽  
pp. 323-328 ◽  
Author(s):  
P. Hofmann ◽  
A. M. Steiner
Keyword(s):  
Seed Quality ◽  
Germination Rate ◽  
The Other ◽  
High Quality ◽  
Viability Loss ◽  
Seed Deterioration ◽  
Seed Pretreatment ◽  
Subsequent Storage ◽  
Wheat Seeds

AbstractHydration-dehydration seed pretreatments are well-known to improve germination rate, germination and vigour. However, contradictory results have been reported concerning the effect of a pretreatment on longevity. The present paper shows that the effect of a seed pretreatment on longevity is largely dependent on the quality of the seed at the time of pretreatment. Pretreating wheat seeds of high quality increased the rate of viability loss during subsequent storage. On the other hand, pretreating wheat seeds of relatively low quality decreased the rate of seed deterioration during subsequent storage. In the light of these findings, hitherto contradictory results in the literature could be explained.

scholarly journals Using Regulatory Flexibility to Address Market Informality in Seed Systems: A Global Study

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 377
Author(s):  
Katrin Kuhlmann ◽  
Bhramar Dey
Keyword(s):  
Seed Quality ◽  
Regulatory Environment ◽  
Control Mechanisms ◽  
Seed Systems ◽  
High Quality ◽  
Design And Implementation ◽  
Key Dimensions ◽  
Regulatory Flexibility

Seed rules and regulations determine who can produce and sell seeds, which varieties will be available in the market, the quality of seed for sale, and where seed can be bought and sold. The legal and regulatory environment for seed impacts all stakeholders, including those in the informal sector, through shaping who can participate in the market and the quality and diversity of seed available. This paper addresses a gap in the current literature regarding the role of law and regulation in linking the informal and formal seed sectors and creating more inclusive and better governed seed systems. Drawing upon insights from the literature, global case studies, key expert consultations, and a methodology on the design and implementation of law and regulation, we present a framework that evaluates how regulatory flexibility can be built into seed systems to address farmers’ needs and engage stakeholders of all sizes. Our study focuses on two key dimensions: extending market frontiers and liberalizing seed quality control mechanisms. We find that flexible regulatory approaches and practices play a central role in building bridges between formal and informal seed systems, guaranteeing quality seed in the market, and encouraging market entry for high-quality traditional and farmer-preferred varieties.

scholarly journals MATURATION STAGES OF FRUITS AND PHYSIOLOGICAL SEED QUALITY OF Physalis ixocarpa BROT. EX HORMEN

2017 ◽  
Vol 39 (3) ◽  
Author(s):  
NATÁLIA DOS SANTOS BARROSO ◽  
MANUELA OLIVEIRA DE SOUZA ◽  
LAURA CAROLINA DA SILVA RODRIGUES ◽  
CLAUDINÉIA REGINA PELACANI
Keyword(s):  
Seed Quality ◽  
Germination Rate ◽  
Development Stage ◽  
Physiological Changes ◽  
Ripe Fruit ◽  
Maturation Stages ◽  
Chlorophyll A And B ◽  
Dark Green ◽  
Dry Matter Weight

ABSTRACT Physalis is represented by species that produce fruits with relevant potential for national and international marketing. The species are normally grown from seeds, so maturation studies are important to assist the point of harvest, as well as seeds with a high physiological potential, since the fruits remain enclosed within a cup throughout their development. Despite the nutraceutical importance of fruits and medicinal potential of many species of Physalisinformation on the physiological seeds quality are scarce. This study aimed to monitor the physical and physiological changes of maturation and the viability of seeds during fruit development stages. The fruits of P. ixocarpa were collected in 15, 25, 35, 45, 55 days after anthesis (DAA). Length, diameter, fresh weight, skin and cup coloring characterization, TSS content, number and weight of seeds per fruit were obtained at each development stage. We also evaluated and correlated the coloring and pigment content of the cup (chlorophyll a and b). Water content, dry matter weight and germination rate were measured from fresh and dry seeds (room conditions, 72 hours). The main physical and physiological changes during maturation occurred within 35 DAA. The maximum physiological seeds quality was achieved within 45 DAA when the cup is completely or partially broken with coloring between yellowish-green and light-yellowish-brown and the ripe fruit in dark-green.

QUALITY OF RUSSIAN WILD RYEGRASS SEED AS INFLUENCED BY TIME AND METHOD OF HARVESTING

1960 ◽  
Vol 40 (3) ◽  
pp. 474-481 ◽  
Author(s):  
T. Lawrence
Keyword(s):  
Detrimental Effect ◽  
Seed Quality ◽  
Immature Stage ◽  
Kernel Weight ◽  
The Other ◽  
Other Hand ◽  
Seed Yields

A study was conducted -with Russian wild ryegrass, Elymus junceus Fisch., to relate seed quality to stage of maturity of the seed at rime of harvest and method of harvesting. Removal of the seed from the seed culms at an immature stage (straight combining), and drying the seed immediately after, had a detrimental effect on the germinability of the seed. This effect decreased as maturity advanced until there was no appreciable germination loss 2 to 3 days before complete maturity. On the other hand, if the seed was left attached to the seed culms until dry and then threshed (swather method) the loss of seed quality attributable to reduced germination was considerably less. However, seed harvested more than 6 days before maturity by both methods had a rather low 100-kernel weight which might he reflected in lower seed yields.

scholarly journals Optimization and sensitivity analysis of fast ethanol assay in maize seeds

2019 ◽  
Vol 41 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Damrongvudhi Onwimol ◽  
Thunyapuk Rongsangchaicharean ◽  
Pitipong Thobunluepop ◽  
Tanapon Chaisan ◽  
Wanchai Chanprasert
Keyword(s):  
Quality Assessment ◽  
Ethanol Production ◽  
Seed Quality ◽  
Storage Conditions ◽  
Ambient Conditions ◽  
Maize Seed ◽  
Seed Deterioration ◽  
Maize Seeds ◽  
Hermetic Seal

Abstract: The evaluation of seed deterioration is very important to control the quality of the seeds stored. This study aimed to investigate the potential of fast ethanol assay for seed quality assessment of maize stored under different conditions. The first experiment was to determine the incubating temperature, incubating time, and amount of seed used in the assay. The results showed that the best protocol for the detection of headspace ethanol was incubation of 3 g of maize seed with 20% moisture content (wet basis) in a 20 mL gas chromatography vial at 70 °C for 1.5 h. The assay induced approximately 200-700 µg.L-1 of headspace ethanol, which was sufficient to identify seeds with different vigour levels. In the second experiment, the optimal conditions were used for quality assessment in aged maize seed stored for 12 months under different storage conditions. The increase in the ethanol production of stored maize seed under the controlled conditions (15 °C and 20% RH in the hermetic seal) was lower than under ambient conditions. The ethanol production levels of maize seed samples at the start of storage was significantly lesser than at six months storage (p < 0.05). The test limitations in deteriorated seed with different cultivars and ages will be discussed.

scholarly journals Yield and physiological quality of wheat seeds after desiccation with different herbicides

2017 ◽  
Vol 39 (3) ◽  
pp. 254-261 ◽  
Author(s):  
Fábio Henrique Krenchinski ◽  
Victor José Salomão Cesco ◽  
Danilo Morilha Rodrigues ◽  
Vinicius Gabriel Caneppele Pereira ◽  
Alfredo Junior Paiola Albrecht ◽  
...  
Keyword(s):  
Seed Quality ◽  
Block Design ◽  
Dry Mass ◽  
Wheat Crop ◽  
Glufosinate Ammonium ◽  
Randomized Block Design ◽  
Seedling Length ◽  
Physiological Quality ◽  
Wheat Seeds

Abstract: Some desiccation techniques for harvesting wheat may affect seed quality. The objective of this study was to evaluate the effect of different desiccant herbicides applied to the wheat crop and their effects on the production and seed quality. The experiment was conducted with cultivar COODETEC 150 (CD 150) in two sites in Palotina (Paraná state, Brazil) with a randomized block design consisting of 7 treatments (desiccation herbicides) and 4 replications. Desiccation was realized when 50% of the plants were in stage 80 with seeds in powdery or mass consistency. The variables analyzed were percentage of moisture content after harvest, Yield, hectoliter weight, mass of 100 seeds, vigor, germination, fresh mass of seedlings, dry mass of seedlings and root length. The herbicides carfentrazone-ethyl and clethodim were the ones that promoted greatest reduction in vigor. The herbicide paraquat caused reduction in seedling length. There was a reduction in the mass of 100 seeds for glufosinate-ammonium, clethodim, diquat and carfentrazone-ethyl. Glufosinate-ammonium, paraquat, glyphosate, clethodim and diquat caused reduction in yield. Desiccation of Cultivar CD 150 at stage 80 is not recommended, since plant Yield and physiological seed parameters were adversely affected by herbicides.

Mung Bean Germination and Three Different Food Waste Composting Processes

2012 ◽  
Vol 602-604 ◽  
pp. 1135-1139
Author(s):  
Kun Liao Chen ◽  
Jian Liang Chen ◽  
Yun Hwei Shen ◽  
Wun Jiun Guo
Keyword(s):  
Root Growth ◽  
Food Waste ◽  
Mung Bean ◽  
Germination Rate ◽  
Growth Conditions ◽  
The Other ◽  
Kitchen Waste ◽  
Production Methods ◽  
Ideal Situation

This study utilized three different compost production methods, the conventional aerated system (CAS), the anaerobic barrel system (ABS), and the rapid-disposal machine (RDM), and observed the related mung bean germination rates, which are indicators that assess the maturity and quality of compost. All three production methods used the same kitchen waste, and reached maturity after 24 days, 60 days and 5 days, respectively. Mung beans were then seeded to test their germination rates. The results showed that by the fifth day, RDM had the best germination rate, followed by the CAS and ABS. However, the former method had a poor root growth, while the other two had ideal situation root growth conditions. After another five days passed, the roots of the beans grown in the RDM compost started to turn black. At the seventh day, the RDM beans all decomposed. However, the young roots of the beans grown in CAS and ABS compost did not suffer in this way.

The Melancholic Mermaid by K. George

2012 ◽  
Vol 1 (4) ◽  
Author(s):  
Amy Paterson
Keyword(s):  
Fairy Tale ◽  
Great Book ◽  
The Other ◽  
Interdisciplinary Management ◽  
Colour Space ◽  
High Quality ◽  
Male And Female ◽  
Female Protagonists ◽  
The University

George, Kallie. The Melancholic Mermaid. Illus. Abigail Halpin. Vancouver: Simply Read Books, 2010. Print. Upon reading a plot summary of Kallie George’s The Melancholic Mermaid, you might first wonder if you’ve read the book before. Humans befriending mermaids, outsiders uniting, and children learning that their differences make them special are all plots that have been told and retold in a variety of mediums. It will be no surprise to readers that, though Maude the two-tailed mermaid has twice the speed, twice the strength, and twice the grace, these same qualities isolate her from the other mer-children. Similarly, when two-legged Tony’s webbed hands are revealed, an unlikely friendship with Maude is inevitable. However, while the plot and themes rarely venture outside established cliché, there are two aspects of The Melancholic Mermaid that not only make it well worth the read but push it over and above similar fare. Firstly, George’s poetic rhythms perfectly capture the lulling melancholy of the seashore. At times, she dances the line between poetry and prose, evoking the rolling tides of a calm day at the beach. Of particular note is her command of alliteration, which when well-executed, rarely fails to captivate children and draw them into a fairy tale world. Secondly, Abigail Halpin’s illustrations are positively breathtaking. Her use of colour, space, and contrast are all wonderful to behold and do a remarkable job of highlighting the settings and mood of George’s story. While the scenes on land are depicted in vibrant purples and reds, the seashore is dominated by calm and subtle shades of blue and green. If you are the type to choose a book by its cover, The Melancholic Mermaid should most certainly be a popular choice. The high quality of the illustrations make The Melancholic Mermaid a great book for beginning readers to grow into, and it will be ideally suited for children transitioning from picture books into shorter chapter books. While the story features both male and female protagonists, it will most likely hold a broader appeal for girls than for boys. Recommended: 3 out of 4 starsReviewer:  Amy Paterson Amy Paterson is a Public Services Librarian at the University of Alberta’s H. T. Coutts Education Library. She was previously the Editor of the Dalhousie Journal of Interdisciplinary Management and is very happy to be involved in the Deakin Review and the delightful world of children’s literature.

scholarly journals Interrelationship Among Seed Quality Parameters and Fungi Associated with Seeds of Cotton (Gossypium Hirsutum L.)

2021 ◽  
Vol 8 (1) ◽  
pp. 1061-1067
Author(s):  
Amina Khatun ◽  
Shamim Shamsi ◽  
MA Bashar
Keyword(s):  
Seed Quality ◽  
Rhizopus Oryzae ◽  
Germination Rate ◽  
Trichoderma Viride ◽  
The Other ◽  
Quality Analysis ◽  
Quality Factors ◽  
Seedling Mortality ◽  
Syncephalastrum Racemosum ◽  
Seed Moisture

A total of twenty nine species of fungi namely Aspergillus aculeatus Lizuka, A. flavus Link, A. fumigatus Fresenius, A. niger Van Tiegh, A. nidulans Eidam, A. subramanianii Visagie, Frisvad & Samson, A. tamariiKita G., A. toxicarius Murak, A. wentii Wehmer, Curvularial unata (Wakker) Boedijn, Colletotrichum gloeosporioides (Penz.) Sacc., C. gossypii Southw., Chaetomium globosum Kunze., Fusarium moniliforme J. Shelden, F. nivale (Fr.) Sorauer, F. oxysporum Schlechtendal, F. fujikuroi Nirenberg, F. solani(Mart.) Sacc., Lasiodiplodiatheobromae (Pat.) Griffon & Maubl., Meyerozyma guilliermondii (Wick.) Kurtzman & M. Suzuki., Mucor sp. P. Micheli ex L., Penicillium aculeatum Raper& Fennell, Penicillium citrinum Thom, Rhizoctonia solani Khun., Rhizopus stolonifer (Ehrenb.) Vuill., Rhizopus oryzae Went & Prins. Geerl., Rhizo mucor sp. Luce t & Costantin, Syncephalastrum racemosum Cohn and Trichoderma viride Pers. were found to be associated with the seeds of 14 varieties viz. CB-1 to CB-14 of cotton. Seed quality analysis showed that percentage of pure seeds, germination, moisture, seedling mortality and associated fungi with different varieties of cotton seeds varies from 97.08-99.92%, 80-93%, 10-11.3%, 16.05-50.30% and 24-78.0% respectively. Present study deals with estimation of interrelationship between some quality factors through correlation and regression analysis are important for the assessment of seed quality. There were negative correlations between seedling mortality and purity percentage and between germination rate and fungus frequency. On the other hand, positive correlations were found between germination rate and purity percentage, between seedling mortality and fungus frequency, between purity percentage and fungus frequency, between germination rate and seed moisture and between fungus frequency and seed moisture. CB 8 was superior from the other cotton variety as it showed higher physical purity of seed (98.41%), higher seed germination (92%), lower fungal incidence (24%) and lower mortality of seedling (23.91%). Bioresearch Commu. 8(1): 1061-1067, 2022 (January)

scholarly journals Sports and Health as Cornerstones of Tourism Development: Case Study of Montenegro

2020 ◽  
Author(s):  
Anđela Jakšić-Stojanović ◽  
Neven Šerić
Keyword(s):  
Natural Resources ◽  
Driving Force ◽  
Tourism Development ◽  
International Market ◽  
The Other ◽  
Special Focus ◽  
Health Tourism ◽  
High Quality

The modern phenomenon of tourism is more focused on specific forms of tourism in which sports and health tourism play a very important role. That fact is not surprising having in mind that they represent interconnected activities that complement each other and give each other completely new dimension. On one side, sports and health represent very important content of tourist offer because of the fact they enable tourists to become active participants in various activities, and on the other side, they represent important driving force for visiting particular destination. The idea of this chapter is to provide a theoretical and practical framework of this issue with a special focus on case study of Montenegro. According to the results of the research that was carried out, the general conclusion is that Montenegro has extremely valuable natural resources and potentials for the development of sports and health tourism, but there are still a lot of challenges that should be faced in the future in order to improve the quality of tourist offer and the level of tourists’ satisfaction as well as to create completely new image of the destination and position it as high-quality sports and health tourist destination on international market.

scholarly journals Physiological quality of osmoprimed Eremanthus erythropappus (D.C.) MacLeish seeds

2020 ◽  
Vol 13 (5) ◽  
pp. 18
Author(s):  
A. M. S. Oliveira ◽  
A. A. Silva ◽  
M. C. Vasconcelos ◽  
J. A. A. Granja ◽  
J. M. R. Faria ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Germination Rate ◽  
Seed Priming ◽  
Potassium Nitrate ◽  
The Other ◽  
Other Substances ◽  
Physiological Quality ◽  
Glycol Solution ◽  
Polyethylene Glycol 6000

Physiological conditioning is a technique that consists in controlling the speed of water uptake by seeds, with osmotic solutions, aiming to improve their quality, reducing time and increasing germination rate. Eremanthus erythropappus (D.C.) MacLeish seeds were subjected to priming with polyethylene glycol 6000 (PEG), potassium nitrate (KNO3) and the combination of the two at the concentrations of 0.4; -0.8; -1.0; -1.2 and -1.4 MPa for four, six and eight days. Germination, germination speed index (GSI), emergence, emergence speed index (ESI) and expression of superoxide dismutase (SOD), catalase (CAT) and peroxidase (PO) enzymes were assessed. E. erythropappus seed priming in polyethylene glycol solution with potentials between -0.8 MPa and -1.4 MPa is not satisfactory because it adversely affects germination and reduces the activity of peroxidase and catalase enzymes. The other substances were not significant so there is a need for further research with other substances and / or concentrations

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