scholarly journals Determination of Different Priming Applications on Vicia freyniana Bronm. Seeds Viability Parametres

2020 ◽  
Author(s):  
O. Yüksel ◽  
B.B. Kenanoğlu ◽  
R.G. Öncü
Keyword(s):  
Research Laboratory ◽  
Germination Rate ◽  
Natural Sciences ◽  
Hot Water ◽  
Hot Water Treatment ◽  
The Third ◽  
Impregnation Technique ◽  
High Germination ◽  
Different Doses

Background: Legumes are the second among all the families in terms of varieties and Vicia genus is the third genus within the Leguminosae family. The germination and emergence rates decrease due to some reasons such as non-homogeneous genetic structure of seed or effect of environmental factors on it. For this reason, some quality problems occur. Quality enhancing applications are performed for seeds to have the desired quality levels in seeds and eliminate the problems. The aim of the present study was to determine the viability of Vicia freyniana Bornm. seeds by different priming treatments. For this purpose, the effect of different chemicals in different doses and periods and at what rate the hot water treatment would affect testa dormancy were studied. Methods: This study was conducted in Uşak University Agriculture and Natural Sciences Faculty Research laboratory in 2019. An investigation was conducted to determine the effects of the priming treatments (Soaking and imbibation; 2, 4 and 6% doses of NaCl, CaCl2 and KNO3 salts and 75, 100 and 125 ppm doses of GA3) on seeds of Vicia freyniana Bornm. In the study, the germination rate (%), germination speed (day), germination index (day) and EC values (µS/cm g-1) of the V. freyniana seeds were determined. Result: The highest germination rates were obtained from 2% of CaCl2 and 75 ppm of GA3 treatments and the fastest germination was observed in KNO3 treatment. From the study, it is concluded that 2% dose of CaCl2 and 75 ppm dose of GA3 should be preferred in V. freyniana seeds and the impregnation technique should be preferred among priming methods due to its high germination performance.

Effect of Seed Treatments on Germination in Acacia

1977 ◽  
Vol 25 (3) ◽  
pp. 269 ◽  
Author(s):  
J Clemens ◽  
PG Jones ◽  
NH Gilbert
Keyword(s):  
Water Treatment ◽  
Germination Rate ◽  
Hot Water ◽  
Practical Significance ◽  
Hot Water Treatment ◽  
Percentage Germination ◽  
Single Treatment ◽  
Seed Mortality ◽  
Different Temperatures ◽  
Time Periods

The germination of seed of five Acacia spp. was studied following a manual chipping treatment or exposure to water held at different temperatures for discrete time periods. Response was evaluated on the basis of the final percentage germination, and estimates of rate of germination and time taken for germination to commence. There were differences in response of the species to hot water sufficiently large to be of practical significance. No single treatment gave optimum germination in all species. Increasing severity of treatment improved germination rate and percentage germination up to a point where seed mortality became apparent. Manual chipping of the seed gave larger improvements in germination rate, and the seeds began to germinate faster than those given any hot water treatment. However, in some species germination percentages were lower in chipped seeds than in those treated with hot water.

Harold Spencer Jones, 1890-1960

1961 ◽  
Vol 7 ◽  
pp. 136-145
Keyword(s):  
Natural Sciences ◽  
Magnitude Scale ◽  
Isaac Newton ◽  
The Third ◽  
Cape Of Good Hope ◽  
The North ◽  
Royal Observatory ◽  
North Polar

Harold Spencer Jones was the third child, and eldest son, of Henry Charles Jones, an accountant, and Sarah Ryland, who had been a schoolmistress. He was born in Kensington on 29 March 1890 and exhibited as a child a remarkable interest in mathematics. He was encouraged in his mathematical interests by his parents, and went to Latymer Upper School, from which he won a scholarship to Jesus College, Cambridge. He took a First Class in Part I of the Mathematical Tripos in 1909, and was a Wrangler in Part II of the Tripos in 1911. He then read Part II of the Natural Sciences Tripos, in Physics, and again secured a First. He was second Smith’s Prizeman in 1913 and Isaac Newton Student in 1912. In 1913 he was elected to a Fellowship in Jesus College. In 1913 he was appointed Chief Assistant at the Royal Observatory, which was then at Greenwich, where he remained for ten years, with some interruption occasioned by the 1914-1918 war. During Spencer Jones’s first period at Greenwich he went to Russia with C. R. Davidson to observe the eclipse of 1914. He wrote several papers on a subject which remained one of great interest to him, namely the variation of latitude, as observed by the Cookson floating telescope. He also made a determination of the photographic magnitude scale of the North Polar Sequence. In the midst of these activities, he was appointed to the office of H.M. Astronomer at the Cape of Good Hope, taking up office in 1923. He was, of course, a young man to be appointed to such a position, in which he was director of a large observatory.

Physical dormancy in seeds of six genera of Australian Rhamnaceae

2005 ◽  
Vol 15 (1) ◽  
pp. 51-58 ◽  
Author(s):  
S.R. Turner ◽  
D.J. Merritt ◽  
C.C. Baskin ◽  
K.W. Dixon ◽  
J.M. Baskin
Keyword(s):  
Seed Dormancy ◽  
Restoration Ecology ◽  
Hot Water ◽  
Optimum Temperature ◽  
Physical Dormancy ◽  
South West ◽  
Temperature Regimes ◽  
High Germination

Physical dormancy (PY) was identified in six genera representative of Australian Rhamnaceae and subsequently was broken, based on identification of key seed dormancy characteristics: (1) isolation and classification of embryo features; (2) imbibition experiments to determine the rate and amount of water uptake in seeds; and (3) determination of optimum temperature regimes for germination. All six species had relatively large spatulate embryos. Imbibition studies showed all species possessed PY (i.e. a water-impervious seed coat) that was broken by a hot-water treatment. Alleviation of PY resulted in high germination (<70%) at 7/18°C, temperatures similar to winter in south-west Western Australia. Germination was suppressed at higher temperatures and in the presence of light. The study adds information to our knowledge of seed dormancy in Australian Rhamnaceae, and highlights the benefits of understanding dormancy states in seeds prior to evaluating dormancy-release mechanisms on wild species used in restoration ecology and horticulture.

scholarly journals Disinfection of Orange Seeds to Reduce Citrus Canker Dissemination and Improve Germination

2020 ◽  
Vol 8 (4) ◽  
pp. 372
Author(s):  
Asma Akbar ◽  
Shehzad Asad ◽  
Zahoor Ahmad ◽  
Azra Nadeem ◽  
Shehla Awan
Keyword(s):  
Water Treatment ◽  
Bacterial Contamination ◽  
Germination Rate ◽  
Citrus Canker ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Surface Sterilization ◽  
Bacterial Inoculum ◽  
Water Treatments ◽  
Important Disease

We evaluated chemo and thermotherapy for decontaminating orange seeds against the bacteria Xanthomonas citri subsp. citri (Xcc), a quarantine and economically important disease worldwide. We infected orange (cv. Valencia) seeds with bacterial inoculum and studied the potential of three different methods i.e. surface sterilization with bleach, disinfection with plant preservative mixture, and hot water treatment to eliminate the bacteria. Our findings showed that the hot water, bleach (NaOCl), and a commercially available mixture of antifungal and antibacterial compounds known as Plant Preservative Mixture (PPM) were very effective in eliminating most bacterial contamination from orange seeds. Our results also showed that treatment with bleach and hot water treatment enhanced seed germination and seedling vigor. Germination rate ranged from 18.51 to 77.78%, 7.41 to 62.96% and 13.33 to 66.67% for bleach, PPM and hot water treatments, respectively. Seedling height ranged from 4.28 to 6.63cm, 4.17 to 5.94cm and 3.42 to 5.99cm for bleach, PPM and hot water treatment, respectively. Findings of this study will provide impactful and practical methods for an economical and robust seed decontamination method.

Investigations on skeletal growth zones via bone scans as base of determination of optimal time for surgery in mandibular asymmetry

2000 ◽  
Vol 39 (05) ◽  
pp. 121-126 ◽  
Author(s):  
R. Werz ◽  
P. Reuland
Keyword(s):  
Bone Growth ◽  
Region Of Interest ◽  
Tracer Uptake ◽  
Optimal Time ◽  
Mandibular Bone ◽  
The Third ◽  
Mandibular Asymmetry ◽  
Bone Scans ◽  
Epiphyseal Plates

Summary Aim of the study was to find out wether there is a common stop of growth of mandibular bone, so that no individual determination of the optimal time for surgery in patients with asymmetric mandibular bone growth is needed. As there are no epiphyseal plates in the mandibular bone, stop of growth cannot be determined on X-ray films. Methods: Bone scans of 731 patients [687 patients (324 male, 363 female) under 39 y for exact determination of end of growth and 44 (21 male, 23 female) patients over 40 y for evaluation of nongrowth dependant differences in tracer uptake] were reviewed for the study. All the patients were examined 3 hours after injection of 99mTc-DPD. Tracer uptake was measured by region of interest technique in different points of the mandibular bone and in several epiphyseal plates of extremities. Results: Tracer uptake in different epiphyseal plates of the extremities shows strong variation with age and good correlation with reported data of bone growth and closure of the epiphyseal plates. The relative maximum of bone activity is smaller in mandibular bone than in epiphyseal plates, which show well defined peaks, ending at 15-18 years in females and at 18-21 years in males. In contrast, mandibular bone shows no well defined end of growing but a gradually reduction of bone activity which remains higher than bone activity in epiphyseal plates over several years. Conclusion: No well defined end of growth of mandibular bone exists. The optimal age for surgery of asymmetric mandibular bone growth is not before the middle of the third decade of life, bone scans performed earlier for determination of bone growth can be omitted. Bone scans performed at the middle of the third decade of life help to optimize the time of surgical intervention.

THE FACTORS OF CAREER SELF-DETERMINATION OF STUDENTS OF HIGHER EDUCATION INSTITUTIONS

2019 ◽  
Vol 7 (1) ◽  
pp. 9-20
Author(s):  
Inna Yeung
Keyword(s):  
Higher Education ◽  
Higher Education Institutions ◽  
Well Being ◽  
Young Person ◽  
Self Determination ◽  
Full Time ◽  
Actual Problem ◽  
The Third ◽  
The Right

Choice of profession is a social phenomenon that every person has to face in life. Numerous studies convince us that not only the well-being of a person depends on the chosen work, but also his attitude to himself and life in general, therefore, the right and timely professional choice is very important. Research about factors of career self-determination of students of higher education institutions in Ukraine shows that self-determination is an important factor in the socialization of young person, and the factors that determine students' career choices become an actual problem of nowadays. The present study involved full-time and part-time students of Institute of Philology and Mass Communications of Open International University of Human Development "Ukraine" in order to examine the factors of career self-determination of students of higher education institutions (N=189). Diagnostic factors of career self-determination of students studying in the third and fourth year were carried out using the author's questionnaire. Processing of obtained data was carried out using the Excel 2010 program; factorial and comparative analysis were applied. Results of the study showed that initial stage of career self-determination falls down on the third and fourth studying year at the university, when an image of future career and career orientations begin to form. At the same time, the content of career self-determination in this period is contradictory and uncertain, therefore, the implementation of pedagogical support of this process among students is effective.

STEM Education Problem Through Striking Differences Between Physics and Biology

2019 ◽  
Author(s):  
Adib Rifqi Setiawan
Keyword(s):  
Nature Of Science ◽  
Stem Education ◽  
Functional Relationship ◽  
Theoretical Models ◽  
Natural Sciences ◽  
Physical Sciences ◽  
P Values ◽  
The Third ◽  
Differences Of Opinion ◽  
Biological Education

This work argues that fundamental differences of opinion as to the nature of science affect whether the “S” in STEM can really apply to all the natural sciences, which will affect how we structure and implement improvements in STEM education. The first part of the argument deals with often-taught definitions of words like “law” and “theory” that don’t really apply to much of physics. In the second part, we notes that mathematics remains inseparable from education in the physical sciences, but this is not the case in biology. Moreover, an appreciation for the worth of mathematical or theoretical models, even disjoint from experiments, is not generally a part of biological education. The third part is “the tyranny of hypotheses.” One of the “cultural” shocks I’ve had moving into biological fields is constantly hearing people talk about “hypotheses” and seeing a steady stream of bar graphs with asterisks and p-values. In physics, one almost never discusses hypotheses; rather, one test relationships between parameters, either analyzing them within some mechanistic framework, or empirically determining what the underlying functional relationship is.

Comparative assessment of informational content of the equations of F.P. Hadlock and the computer program of V.N. Demidov in determination of term of gestation and fetal weight in the III trimester of gestation

2017 ◽  
Author(s):  
E.A. Derkach , O.I. Guseva
Keyword(s):  
Computer Program ◽  
High Precision ◽  
Gestational Age ◽  
Computer Programs ◽  
Comparative Assessment ◽  
Fetal Weight ◽  
Informational Content ◽  
Third Trimester ◽  
The Third

Objectives: to compare the accuracy of equations F.P. Hadlock and computer programs by V.N. Demidov in determining gestational age and fetal weight in the third trimester of gestation. Materials: 328 patients in terms 36–42 weeks of gestation are examined. Ultrasonography was performed in 0–5 days prior to childbirth. Results: it is established that the average mistake in determination of term of pregnancy when using the equation of F.P. Hadlock made 12,5 days, the computer program of V.N. Demidov – 4,4 days (distinction 2,8 times). The mistake within 4 days, when using the equation of F.P. Hadlock has met on average in 23,1 % of observations, the computer program of V.N. Demidov — 65,9 % (difference in 2,9 times). The mistake more than 10 days, took place respectively in 51,7 and 8,2 % (distinction by 6,3 times). At a comparative assessment of size of a mistake in determination of fetal mass it is established that when using the equation of F.P. Hadlock it has averaged 281,0 g, at application of the computer program of V.N. Demidov — 182,5 g (distinction of 54 %). The small mistake in the mass of a fetus which isn't exceeding 200 g at application of the equation of F.P. Hadlock has met in 48,1 % of cases and the computer program of V.N. Demidov — 64,0 % (distinction of 33,1 %). The mistake exceeding 500 g has been stated in 18 % (F.P. Hadlock) and 4,3 % (V.N. Demidov) respectively (distinction 4,2 times). Conclusions: the computer program of V.N. Demidov has high precision in determination of term of a gestation and mass of a fetus in the III pregnancy.

Introduction

2018 ◽  
Author(s):  
Chakravarthi Ram-Prasad
Keyword(s):  
Philosophical Tradition ◽  
Phenomenological Tradition ◽  
The Third ◽  
Western Philosophical Tradition ◽  
The Subject ◽  
To Come

The Introduction outlines the various chapters. It then situates the question of ‘body’ in the modern Western philosophical tradition following Descartes, and argues that this leaves subsequent responses to come under one of three options: metaphysical dualism of body and subject; any anti-dualist reductionism; or the overcoming of the divide. Describing the Phenomenology of Merleau-Ponty as a potent example of the third strategy, the Introduction then suggests his philosophy will function as foil to the ecological phenomenology developed and presented in the book. Moreover, one approach within the Western Phenomenological tradition, of treating phenomenology as a methodology for the clarification of experience (rather than the means to the determination of an ontology of the subject) is compared to the approach in this book. Since classical India, while understanding dualism, did not confront the challenge of Descartes (for better or for worse), its treatment of body follows a different trajectory.

scholarly journals Propagation of Pistacia lentiscus var. Chia Genotypes and Determination of Their Ornamental Traits Combined with a Genetic Analysis Using ISSR Markers

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 205
Author(s):  
Stefanos Kostas ◽  
Stefanos Hatzilazarou ◽  
Elias Pipinis ◽  
Anastasios Vasileiadis ◽  
Panagiotis Magklaras ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Germination Rate ◽  
Leaf Traits ◽  
Issr Markers ◽  
Pistacia Lentiscus ◽  
Natural Habitats ◽  
Indolebutyric Acid ◽  
Single Male ◽  
Asexual Propagation

Pistacia lentiscus L. is a dioecious shrub or small tree with high drought resistance, native in the entire Mediterranean basin. The variety ‘Chia’ (mastic tree) is cultivated for the production of mastic gum (a resin produced after wounding of the trunks and thick branches) in the Island of Chios (Greece), but it also has a significant ornamental value. In the present study, ten male and ten female genotypes of P. lentiscus var. Chia from the natural habitats of Chios were selected and examined with respect to the rooting efficiency of their shoot cuttings. The germination ability of the seeds was also tested. The 20 plants were morphologically described, mainly with respect to traits related to their ornamental value. Furthermore, leaves were collected from the 20 genotypes, from which genomic DNA (gDNA) was isolated, followed by amplification of gDNA fragments using the polymerase chain reaction (PCR) and inter simple sequence repeat (ISSR) primers. This was done aiming both at the determination of their genetic distance and the establishment of possible correlations between the amplified bands and certain morphological traits. The results of the study showed that there were differences among the genotypes for both methods of propagation. Regarding the rooting of the shoot cuttings, the best genotype was 8M (cv. ‘Psilophyllos’), achieving a rooting rate of 62.5% in winter with the application of indolebutyric acid (potassium salt of IBA), while regarding the seed germination capacity the genotype 2F exhibited the highest germination rate (57%). Genetic analysis using ISSRs separated the plants into four groups, one group consisting of male genotypes, one of the female genotypes, one consisting of members from both genders and a fourth containing a single male genotype. The genetic analysis of the male genotypes only produced a dendrogram showing the cultivars clustering in three different groups. Regardless of the genetic analysis, it seems that there were correlations between the ISSR markers and the leaf traits and also the gender and the asexual propagation. These correlations can assist future breeding programs of P. lentiscus var. Chia.

Sign in / Sign up

Export Citation Format

Share Document