scholarly journals Connection between Nutrient Content and Resistance to Selected Pests Analyzed in Brassicaceae Hybrids

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 94
Author(s):  
Justyna Szwarc ◽  
Janetta Niemann ◽  
Jan Bocianowski ◽  
Monika Jakubus ◽  
Marek Mrówczyński
Keyword(s):  
Positive Association ◽  
Nutrient Content ◽  
Mineral Elements ◽  
Delia Radicum ◽  
Growth Stages ◽  
Flowering Stage ◽  
Brassica Napus L ◽  
Wide Range ◽  
Cultivated Species ◽  
The Relationship

Rapeseed (Brassica napus L. ssp. oleifera Metzg) is attacked by a wide range of pests. Breeding of resistant cultivars is one of the best methods of protecting crops against insects, and non-cultivated species of Brassicaceae can be used as resistance donors. In this study, we investigated the relationship between nutrient content and resistance to two commonly occurring pests (Delia radicum and Brevicoryne brassicae) in 12 Brassicaceae hybrid combinations. The experiment was conducted at Poznań University of Life Sciences Experimental Station located in Dłoń. The assessment was carried out for three years (2017, 2018, and 2019) on randomly chosen individuals in two growth stages: vegetative stage and flowering stage. The resistance to B. brassicae and D. radicum was observed in all three years, however, macronutrient and micronutrient contents as well as total nitrogen, total sulfur, and sulfur sulfate were observed only in 2019. Statistically significant negative association between Ca and resistance to B. brassicae and D. radicum was discovered. Additionally, positive association between Cu and resistance to B. brassicae was observed. The importance of selected mineral elements in plant resistance is widely discussed.

The relationship between the yields of eight varieties of Nigerian maize and content of nitrogen, phosphorus and potassium in the leaf at flowering stage

1972 ◽  
Vol 79 (3) ◽  
pp. 391-396 ◽  
Author(s):  
Akinola A. Agboola
Keyword(s):  
Grain Yield ◽  
Critical Level ◽  
Nutrient Content ◽  
Critical Levels ◽  
Flowering Stage ◽  
Growing Seasons ◽  
Phosphorus And Potassium ◽  
High Yielding Varieties ◽  
The Relationship ◽  
Nitrogen Phosphorus

SUMMARYStudies of the relationship between yield and content of N, P and K in the ear leaf of eight varieties of Nigerian maize, tested for three growing seasons, indicated that the varieties have different critical nutrient levels, although the values obtained for individual varieties were not significantly different from the pooled average critical level for any of the nutrients. The critical levels ranged from 2·85 to 3·19% N, 0·20 to 0·27% P and 2·06 to 2·60% K, while their pooled averages were 3·10% N, 0·23% P and 2·44% K.High ear leaf nutrient content was not a guarantee of high grain yield, and ear leaf nutrient values of low-yielding varieties were similar to those of the high-yielding varieties.

scholarly journals Examining the Relationship Between Hair Cortisol With Stress-Related and Transdiagnostic Subclinical Measures

2021 ◽  
Vol 12 ◽  
Author(s):  
Pilar Torrecilla ◽  
Neus Barrantes-Vidal
Keyword(s):  
Young Adults ◽  
Positive Association ◽  
Total Sample ◽  
Wide Distribution ◽  
Hair Cortisol ◽  
Stress Buffering ◽  
Hair Samples ◽  
Wide Range ◽  
As Stress ◽  
The Relationship

Background: Hair cortisol concentrations (HCC) provide a retrospective examination of long-term cortisol production as a measure of the hypothalamic-pituitary-adrenal (HPA) axis functioning, one of the major neural systems implicated in mediating the effects of stress on mental illness. However, evidence about the relationship between HCC with stressors and symptoms is scattered. In the present study, we aimed to examine the association between HCC and a wide range of stress-related and transdiagnostic subclinical measures in a sample of non-clinical young adults with a wide distribution of schizotypy.Methods: A total sample of 132 non-clinical young adults recruited at college and technical schools oversampled for schizotypy scores were assessed on distal and proximal stressful experiences, appraisals of stress, traits and symptoms of the affective, psychosis and dissociation spectrums, as well as stress-buffering measures, and provided 3 cm-hair samples.Results: No significant associations were found between HCC and any of the stress-related and subclinical measures. Only suspiciousness and disorganization showed a trend for a positive association with HCC but the magnitude was small.Conclusions: The present findings support previous studies indicating an overall lack of concordance between a broad range of stress-related and (sub)clinical phenotypic measures with hair cortisol. This study examined for the first time the relationship of HCC with the non-clinical expression of the psychosis spectrum, that is, schizotypy, which complements previous studies on clinical high risk and established psychosis and offers a promising strategy for studying possible HPA dysfunctions characterizing the subclinical psychosis continuum without the confounds associated to clinical psychosis.

scholarly journals Yield of three newly developed mustard varieties as affected by irrigation at different growth stages

2015 ◽  
Vol 2 (2) ◽  
pp. 197-206
Author(s):  
Monira Khatun ◽  
Partha Biswas ◽  
Md Moudud Hasan ◽  
Nazmun Nahar Karim ◽  
MG Mostofa Amin
Keyword(s):  
Brassica Juncea ◽  
Crop Production ◽  
Growth Stages ◽  
Silty Clay ◽  
Flowering Stage ◽  
Brassica Napus L ◽  
Yield Attributes ◽  
Use Efficiency ◽  
Irrigation Treatments ◽  
Different Growth Stages

Efficient use of water is essential for sustainable crop production and achieving food security especially where water is a scarce resource. A study was conducted at a farmer’s field near Rahmatpur, Mymensingh, Bangladesh during November 2012– February 2013 to study the effect of irrigation on the yield and yield attributes of three newly developed mustard varieties, namely Binasarisha-7 (Brassica juncea L), Binasarisha-8 (Brassica juncea L), and Binasarisha-4 (Brassica napus L). The experimental soil was silty clay with a bulk density of 1.43 g cm-3. There were four irrigation treatments (T1: no irrigation; T2: irrigation at vegetative stage; T3: irrigation at flowering stage; T4: irrigation at vegetative and flowering stage), each replicated three times in a split plot design. Irrigation showed significant effect on the yield attributes of the mustard varieties. The highest yield of 1.43 t ha-1 (46% higher over control) was obtained in treatment T4 of variety Binasarisha-7. The lowest yield of 0.63 t ha-1 was obtained in treatment T1 (control) of variety Binasarisha-4. For producing seed yield Binasarisha-4 was the most responsive to the irrigation treatments (T2–T4). In contrast, the yield differences among the stage-wise irrigation treatments (T2–T4) were not statistically significant for Binasarisha-8. The highest water use efficiency of 0.48 t ha-1 cm-1 was obtained in treatment T1 and the lowest of 0.28 t ha-1 cm-1 was in treatment T4. For cultivation of the mustard varieties Binasarisha-4, Binasarisha-7 and Binasarisha-8 in this type of climate, irrigation at vegetative and flowering stage may be recommended to produce higher yield.Res. Agric., Livest. Fish.2(2): 197-206, August 2015

Analyse Statistique Et Psychodynamique De La Population Canadienne-Française Qui Consulte En Pédopsychiatrie: Étude Préliminaire

1968 ◽  
Vol 13 (4) ◽  
pp. 341-352 ◽  
Author(s):  
Jacques Mackay ◽  
Julien Bigras ◽  
Carla Melvyn ◽  
Claudette Bélair
Keyword(s):  
Retrospective Study ◽  
Positive Association ◽  
Professional Staff ◽  
Adopted Children ◽  
Foster Homes ◽  
Lack Of Information ◽  
Number Of Patients ◽  
Wide Range ◽  
Severe Pathology ◽  
The Relationship

In this retrospective study covering the total number of patients assessed in the Psychiatric Out-Patient Clinic of St. Justine's Hospital during a period of three months, the authors have accumulated a wide range of data and presented their significant findings concerning both the specifications of the group under study and the manner in which the professional staff had been dealing with the cases. A positive association was found between pathology in the milieu and pathology in the children. A lack of information about fathers was noted. Differences between girls and boys in terms of incidence and types of pathology appeared significant. The authors have been impressed with the high proportion of their cases which had been previously placed in foster homes. It was noted that the type of patients who had been in foster homes presented not so much a more severe pathology but on the whole a ‘noisier’ type of manifestation. Other interesting observations were made on adopted children and on the groups with working and non-working mothers. Some comparisons between the diagnosis and prognoses established by the team, and a study of the relationship between the recommendations made and those carried out, brought about an increased awareness of our own level of efficiency. A survey of the recommendations made for the less talented children indicated a bias in favour of the more talented group.

scholarly journals Influence of 24-epibrassinolide on seedling growth and distribution of mineral elements in two maize hybrids

2017 ◽  
Vol 71 (3) ◽  
pp. 201-209 ◽  
Author(s):  
Hadi Waisi ◽  
Andjelka Petkovic ◽  
Bogdan Nikolic ◽  
Bojan Jankovic ◽  
Vera Raicevic ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Photosynthetic Apparatus ◽  
Mineral Elements ◽  
Early Growth ◽  
Growth Potential ◽  
Growth Stages ◽  
Maize Hybrids ◽  
Stage Of Development ◽  
Seedling Biomass ◽  
Wide Range

In this study, influence of wide range of 24-epibrassinolide (24-EBL) on early growth potential of two maize hybrids (ZP 434 and ZP 704) was examined. Paper concerns germination, seedling biomass, important chlorophylls content, and redistribution of elements (heavy metals and microelements), in a seedlings of the maize hybrids, as influenced by different 24-EBL concentrations. It was found that hybrids react differently to exogenously applied hormone. The biggest differences between two examined maize hybrids considering the germination level were reached with the lowest values at 86% for ZP 704 and 72% for ZP 434, gained at the highest applied concentration of 24-EBL. Seedlings of hybrid ZP 434 reacted positively moderately in the case of shoot length and biomass under the influence of 24-EBL, but seedlings of hybrid ZP 704 had lower values of these parameters under the influence of the phytohormone. Chlorophyll a/b ratios showed that photosynthetic apparatus of seedlings of the hybrids is not active in this stage of development. It was established that 24-EBL affects seedling growth and re-allocation of naturally present mineral elements in early growth stages and that could be one of the reason for poorer growth of ZP 704 treated with various concentrations of 24-EBL, comparing to control. When applied in lower concentrations, 24-EBL is blocking toxic elements such as chromium and nickel to relocate to vital parts of plant, what was case in hybrid ZP704. In case of ZP 434, lower concentrations of 24-EBL are affecting re-allocation of Cu and Cr and these findings suggest that maize hybrid seedlings treated with lower concentrations of 24-EBL could survive and be successful in polluted areas.

The visual assessment of pasture yield

1973 ◽  
Vol 13 (62) ◽  
pp. 263 ◽  
Author(s):  
NA Campbell ◽  
GW Arnold
Keyword(s):  
Dry Matter ◽  
Large Range ◽  
Visual Assessment ◽  
Growth Stages ◽  
Botanical Composition ◽  
Visual Estimation ◽  
Wide Range ◽  
Trained Observers ◽  
The Relationship ◽  
Single Calibration

The methodology of using a visual estimation technique to assess dry matter yield of pastures was studied in eight experiments. Various aspects were examined, viz: the shape of the relationship between actual and visually assessed yield; whether observers could maintain consistency over a period of hours; the effects on consistency of prediction of the sequence of yield of pastures; whether a wide range in botanical composition could be accommodated; whether green and dry pasture could be assessed with equal precision. A linear relation, or occasionally a curvilinear relation, was obtained over a large range in yield. No consistent bias due to immediate previous values in a sequence was found. However, it was found that, without training, observers over-estimated the effects of height and under-estimated the effects of density in yield. In practice, trained observers gave much more accurate regressions; for green annual pastures at all growth stages, dry annual pastures, and irrigated lucerne, lovegrass and pangola grass, r2 values were greater than 0.70 on all but 11 per cent of 126 occasions.A wide range of botanical composition was able to be included in a single calibration, i.e. ryegrass, capeweed, sub clover and erodium. Recommendations are made for routine use of the technique in the field.

The Problem of Identifying and Modeling the Relationship between Monetary Factor and Inflation in the Russian Economy

2008 ◽  
pp. 61-76
Author(s):  
A. Porshakov ◽  
A. Ponomarenko
Keyword(s):  
Money Supply ◽  
Money Demand ◽  
Russian Economy ◽  
Long Run ◽  
Complex Approach ◽  
Wide Range ◽  
Long Time ◽  
The Relationship ◽  
Supply Side Factors

The role of monetary factor in generating inflationary processes in Russia has stimulated various debates in social and scientific circles for a relatively long time. The authors show that identification of the specificity of relationship between money and inflation requires a complex approach based on statistical modeling and involving a wide range of indicators relevant for the price changes in the economy. As a result a model of inflation for Russia implying the decomposition of inflation dynamics into demand-side and supply-side factors is suggested. The main conclusion drawn is that during the recent years the volume of inflationary pressures in the Russian economy has been determined by the deviation of money supply from money demand, rather than by money supply alone. At the same time, monetary factor has a long-run spread over time impact on inflation.

Product Brand Loyalty and Purchase Decision

2020 ◽  
Vol 3 (3) ◽  
pp. 76-87
Author(s):  
Muhammad Naeem ◽  
Abdul Sami
Keyword(s):  
Brand Loyalty ◽  
Quantitative Research ◽  
Research Study ◽  
Positive Association ◽  
Perceived Quality ◽  
Purchase Decision ◽  
Cross Sectional ◽  
Business World ◽  
Multiple Variables ◽  
The Relationship

The present study was an examination of the relationship between product brand loyalty and purchase decision of automotive customers. The study focused on comparative analysis of two famous brands of automobile i-e Honda City and Toyota Corolla Xli and the various effects of product brand loyalty on purchase decision of automotive customers. A cross sectional quantitative research design was employed in the research study. In today’s competitive business world, now most of the marketers and manufacturers of various brands have encountered with multiple variables through which they can not only influence the purchase decision of their customers but also secure their buying preferences. The variables that are used and relevant to this study are product brand loyalty, perceived quality, price, and purchase decision. During examination of the relationship between these variables, study investigated that there is a positive association between product brand loyalty, product perceived quality, price and purchase decision.

Audit Senior Modeling Fallibility: The Effects of Reduced Error Strain and Enhanced Error-Related Self-Efficacy on Audit Juniors' Responses to Self-Discovered Errors

2019 ◽  
Vol 31 (2) ◽  
pp. 17-30 ◽  
Author(s):  
Craig Emby ◽  
Bin Zhao ◽  
Jost Sieweke
Keyword(s):  
Survey Data ◽  
Self Efficacy ◽  
Direct Relationship ◽  
Positive Association ◽  
Accounting Firms ◽  
Big 4 ◽  
The Relationship ◽  
Practical Implications

ABSTRACT This paper examines the relationship between audit seniors discussing their own experiences with committing and correcting errors (modeling fallibility), and audit juniors' thinking about errors and error communication (openly discussing their own self-discovered errors). The paper investigates the direct relationship between senior modeling fallibility and juniors' responses, and whether the relationship is mediated through error strain and error-related self-efficacy. Survey data from 266 audit juniors from two Big 4 Canadian accounting firms showed a direct positive association between audit senior modeling fallibility and audit juniors' thinking about errors, and error communication. This relationship is positively mediated through error-related self-efficacy. We also found that the relationship is mediated by error strain. However, although audit senior modeling fallibility was associated with reduced error strain, error strain was positively related to both thinking about errors and error communication, contrary to our hypothesis. The paper discusses the theoretical and practical implications of these results.

scholarly journals Effects of urban atmospheric particulate matter on higher plants using Lycopersicon esculentum as model species

2021 ◽  
Vol 3 (9) ◽  
Author(s):  
Katalin Hubai ◽  
Nora Kováts ◽  
Gábor Teke
Keyword(s):  
Particulate Matter ◽  
Lycopersicon Esculentum ◽  
Protein Content ◽  
Higher Plants ◽  
Nutrient Content ◽  
Atmospheric Particulate Matter ◽  
Dose Effect ◽  
Atmospheric Particulate ◽  
Wide Range ◽  
Treatment Experiment

AbstractAtmospheric particulate matter (PM) is one of the major environmental concerns in Europe. A wide range of studies has proved the ecotoxic potential of atmospheric particles. PM exerts chemical stress on vegetation by its potentially toxic constituents; however, relatively few studies are available on assessing phytotoxic effects under laboratory conditions. In our study, aqueous extract of particulate matter was prepared and used for treatment. Experiment was following the procedure defined by the No. 227 OECD Guideline for the Testing of Chemicals: Terrestrial Plant Test. Tomato (Lycopersicon esculentum Mill.) plants were used; elucidated toxicity was assessed based on morphological and biochemical endpoints such as biomass, chlorophyll-a and chlorophyll-b, carotenoids, and protein content. Biomass reduction and protein content showed a clear dose–effect relationship; the biomass decreased in comparison with the control (100%) in all test groups (TG) at a steady rate (TG1: 87.73%; TG2: 71.77%; TG3: 67.01%; TG4: 63.63%). The tendency in protein concentrations compared to the control was TG1: 113.61%; TG2: 148.21% TG3: 160.52%; TG4: 157.31%. However, pigments showed a ‘Janus-faced’ effect: nutrient content of the sample caused slight increase at lower doses; actual toxicity became apparent only at higher doses (chlorophyll-a concentration decrease was 84.47% in TG4, chlorophyll-b was 77.17%, and finally, carotene showed 83.60% decrease in TG4).

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