scholarly journals The role of genotypes on phosphorus, zinc, manganese and iron status and their relations in leaves of maize on hydromorphic soil

2011 ◽  
Vol 50 (No. 12) ◽  
pp. 535-539 ◽  
Author(s):  
V. Kovačević ◽  
I. Brkić ◽  
D. Šimić ◽  
G. Bukvić ◽  
M. Rastija
Keyword(s):  
Mineral Content ◽  
Zea Mays L ◽  
Iron Status ◽  
Correlation Coefficients ◽  
Hydromorphic Soil ◽  
Maize Hybrids ◽  
Fe Content ◽  
High Repeatability ◽  
Nutritional Imbalance

Hydromorphy is a major soil fertility constraint in Europe and North America causing specific nutritional imbalance in soils and crops. The objectives of this study were to examine the differences among maize hybrids in phosphorus (P), zinc (Zn), manganese (Mn) and iron (Fe) status in leaves, and to investigate the interrelationship among these micronutrients as well as the interrelationship between Zn and P on hydromorphic soil in Eastern Croatia. Twenty maize (Zea mays L.) hybrids were grown under field conditions of Eastern Croatia in a period of two years. Considerable differences in mean ear-leaf Zn, Mn and Fe contents at silking stage were found ranging from 16.3 to 30.0 mg/kg for Zn, from 28.5 to 62.2 mg/kg for Mn and from 137 to 222 mg/kg for Fe content. Mean ratios among nutrients were at acceptable levels: 146 (P:Zn), 7.6 (Fe:Zn) and 3.72 (Fe:Mn). Differences among the hybrids ranged from 95.1 to 210.4 (P:Zn), from 5.3 to 10.4 (Fe:Zn) and from 2.4 to 5.79 (Fe:Mn). Maize hybrids which have higher P:Zn is less acceptable for growing on soils which are either rich in P or moderate in available Zn. Highly significant correlation coefficients between years for mineral content (0.696 for Zn, 0.586 for Mn and 0.525 for Fe) indicated high repeatability estimates within genotypes across the seasons and importance of heredity for nutritional status.

Heterosis in relation to genetic divergence in short duration maize (Zea mays L.)

2021 ◽  
pp. 137-142
Author(s):  
Bal Krishna ◽  
Birender Singh ◽  
Shyam Sundar Mandal ◽  
Rashmi Kumari ◽  
Tushar Ranjan
Keyword(s):  
Genetic Distance ◽  
Genetic Divergence ◽  
Zea Mays L ◽  
Correlation Coefficients ◽  
Negative Association ◽  
Coefficient Of Determination ◽  
Maize Hybrids ◽  
Single Cross ◽  
Per Se ◽  
Linear Regressions

Thirteen lines and three testers were used to produce 39 single cross maize hybrids by line Ítester mating design. The genetic divergence among thirteen lines and three tester of maize were estimated by using Mahalanobis D2 statistic for twelve characters. The genotypes were grouped into five clusters. Cluster I comprised 12 parental genotypes (L1, L2, L3, L4, L5; L6, L7, L8, L9, L11; L12, L13), while Cluster II (T3), III (T1), IV (L10) and V (T2) were mono-genotypic, suggesting more variability in genetic makeup of the genotypes included in these clusters. The correlation coefficients and linear regressions were used to know the effects of parental genetic distance in determining heterosis and per se performance of the hybrids. Parental genetic distance exhibited significant negative association and significant linear regression along with very low coefficient of determination with better parent heterosis (BPH) and non-significant with per se performance of the hybrids. The present investigation, therefore, the parental genetic distance has significant role in determining heterosis and hybrid performance in kharif maize.

scholarly journals Selection approaches to the variation of responses to soil compaction stress among maize hybrids ( Zea mays L.)

2021 ◽  
Author(s):  
Maciej T. Grzesiak ◽  
Anna Maksymowicz ◽  
Barbara Jurczyk ◽  
Tomasz Hura ◽  
Grzegorz Rut ◽  
...  
Keyword(s):  
Zea Mays ◽  
Soil Compaction ◽  
Zea Mays L ◽  
Maize Hybrids ◽  
Compaction Stress

scholarly journals Induced Disruption of the Iron-Regulatory Hormone Hepcidin Inhibits Acute Inflammatory Hypoferraemia

2016 ◽  
Vol 8 (5) ◽  
pp. 517-528 ◽  
Author(s):  
Andrew E. Armitage ◽  
Pei Jin Lim ◽  
Joe N. Frost ◽  
Sant-Rayn Pasricha ◽  
Elizabeth J. Soilleux ◽  
...  
Keyword(s):  
Mouse Model ◽  
Transgenic Mouse ◽  
Brucella Abortus ◽  
Serum Iron ◽  
Vibrio Vulnificus ◽  
Iron Status ◽  
Transgenic Mouse Model ◽  
Innate Immune ◽  
Serum Hepcidin

Withdrawal of iron from serum (hypoferraemia) is a conserved innate immune antimicrobial strategy that can withhold this critical nutrient from invading pathogens, impairing their growth. Hepcidin (Hamp1) is the master regulator of iron and its expression is induced by inflammation. Mice lacking Hamp1 from birth rapidly accumulate iron and are susceptible to infection by blood-dwelling siderophilic bacteria such as Vibrio vulnificus. In order to study the innate immune role of hepcidin against a background of normal iron status, we developed a transgenic mouse model of tamoxifen-sensitive conditional Hamp1 deletion (termed iHamp1-KO mice). These mice attain adulthood with an iron status indistinguishable from littermate controls. Hamp1 disruption and the consequent decline of serum hepcidin concentrations occurred within hours of a single tamoxifen dose. We found that the TLR ligands LPS and Pam3CSK4 and heat-killed Brucella abortus caused an equivalent induction of inflammation in control and iHamp1-KO mice. Pam3CSK4 and B. abortus only caused a drop in serum iron in control mice, while hypoferraemia due to LPS was evident but substantially blunted in iHamp1-KO mice. Our results characterise a powerful new model of rapidly inducible hepcidin disruption, and demonstrate the critical contribution of hepcidin to the hypoferraemia of inflammation.

scholarly journals The Species Composition and Seasonal Dynamics of Thrips (Thysanoptera) Populations on Maize (Zea Mays L.) in Southeastern Poland

2011 ◽  
Vol 51 (3) ◽  
pp. 210-216 ◽  
Author(s):  
Halina Kucharczyk ◽  
Paweł Bereś ◽  
Zbigniew Dąbrowski
Keyword(s):  
Zea Mays ◽  
Species Composition ◽  
Seasonal Dynamics ◽  
Food Source ◽  
Zea Mays L ◽  
Maize Plant ◽  
Seasonal Abundance ◽  
Immature Stages ◽  
Thrips Species

The Species Composition and Seasonal Dynamics of Thrips (Thysanoptera) Populations on Maize (Zea MaysL.) in Southeastern PolandThrips species composition and seasonal abundance was studied on maize crops during two seasons (2006-2007), in southeastern Poland. Altogether 21 species have been identified, among themFrankliniella tenuicornis(Uzel 1895) andHaplothrips aculeatus(Fabricius 1803) which are a graminicolous species and were eudominants, comprising 96.8% in 2006 and 82.0% in 2007 of all collected specimens. Other species occurred only in low numbers. The frequent and numerous presence ofF. tenuicornisspecies in their immature stages in the samples, confirmed the role of the maize plant as the host.H. aculeatusprobably chose maize as a food source and substitute plant for breeding.

Determining the Role of Customer Satisfaction in Gaining Customer Loyalty among Cafés

2020 ◽  
Vol 8 (1) ◽  
pp. 74-85
Author(s):  
Allen Joshua P. Cuñado ◽  
Cathlyn Mae Painagan ◽  
Jeshnin Ann L. Cuñado ◽  
Ella Marie D. Palmada ◽  
Zenar Jane A. Mumar ◽  
...  
Keyword(s):  
Customer Satisfaction ◽  
Customer Loyalty ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Significant Degree ◽  
Business Success ◽  
Research Approach ◽  
Chi Square ◽  
Chi Square Test

Café as an establishment primarily sells refreshing drinks, snacks, and light meals, with coffee being their flagship product. This type of business is steadily multiplying around the city of Tagbilaran, Bohol, Philippines. Customers have linked to business success as well as customer satisfaction and customer loyalty. This study was implemented to analyze the role of customers’ satisfaction in gaining customers’ loyalty, specifically among purposively selected cafés. The quantitative method of research approach was used with the aid of questionnaires. The data gathered were statistically treated making use of frequency, composite means, weighted mean, chi-square test, and Pearson correlation coefficients. The respondents included 210 customers from the purposively selected cafés. Results showed respondents to be very satisfied (VS) for the Product; for the price; for the place; for the service quality; and moderately satisfied (MS) for promotion. Results further showed that there is a significant degree of relationship between customer satisfaction and customer loyalty.

scholarly journals On the effect of rheology on seasonal sea-ice simulations

1991 ◽  
Vol 15 ◽  
pp. 17-25 ◽  
Author(s):  
Chi F. Ip ◽  
William D. Hibler ◽  
Gregory M. Flato
Keyword(s):  
Shear Stress ◽  
Sea Ice ◽  
Correlation Coefficients ◽  
Arctic Basin ◽  
The Arctic ◽  
Flow Rule ◽  
Average Model ◽  
Ice Drift ◽  
Cavitating Fluid

A generalized numerical model which allows for a variety of non-linear rheologies is developed for the seasonal simulation of sea-ice circulation and thickness. The model is used to investigate the effects (such as the role of shear stress and the existence of a flow rule) of different rheologies on the ice-drift pattern and build-up in the Arctic Basin. Differences in local drift seem to be closely related to the amount of allowable shear stress. Similarities are found between the elliptical and square cases and between the Mohr-Coulomb and cavitating fluid cases. Comparisons between observed and simulated buoy drift are made for several buoy tracks in the Arctic Basin. Correlation coefficients to the observed buoy drift range from 0.83 for the cavitating fluid to 0.86 for the square rheology. The average ratio of buoy-drift distance to average model-drift distance for several buoys is 1.15 (square), 1.18 (elliptical), 1.30 (Mohr-Coulomb) and 1.40 (cavitating fluid).

scholarly journals Nickel Toxicity Induced Changes in Nutrient Dynamics and Antioxidant Profiling in Two Maize (Zea mays L.) Hybrids

Plants ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 5 ◽  
Author(s):  
Muhammad Amjad ◽  
Hasan Raza ◽  
Behzad Murtaza ◽  
Ghulam Abbas ◽  
Muhammad Imran ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Elevated Level ◽  
Nutrient Dynamics ◽  
Zea Mays L ◽  
Nutrient Concentrations ◽  
Nickel Toxicity ◽  
Maize Hybrid ◽  
Maize Hybrids ◽  
Growth Physiology ◽  
Induced Changes

Nickel (Ni) is among the essential micronutrient heavy metals utilized by plants. However, an elevated level of Ni causes serious concerns for plants’ physiology and their survival. This study evaluated the mechanisms influencing the growth, physiology, and nutrient dynamics in two commercial maize hybrids (Syngenta and Pioneer) exposed to Ni treatments in hydroponics nutrient solution (NS). Seedlings were raised in plastic trays with quartz sand, and subsequently transferred to Hoagland’s NS at the two leaves stage. After three days of transplantation, Ni levels of 0, 20, and 40 mg L−1 were maintained in the nutrient solution. After 30 days of Ni treatments, seedlings were harvested and different growth, physiological, and nutrient concentrations were determined. The results showed that with increasing Ni concentration, the growth of maize hybrids was significantly reduced, and the maize hybrid, Pioneer, showed significantly higher growth than that of Syngenta at all levels of Ni. Higher growth in Pioneer is ascribed to elevated levels of antioxidant enzymes (SOD, CAT, GR, APX, and POX), lower damage to cellular membranes (i.e., higher MSI and lower MDA), and higher tissue nutrient concentrations (N, P, K, Ca, Mg, Fe, Mn, Zn, and Cu). Furthermore, the maize hybrids showed a difference in nutrient translocation from root to shoot which could be one of the factors responsible for differential response of these hybrids against Ni treatments.

scholarly journals The Role of Indigenous Mycorrhiza in Combination with Cattle Manure in Improving Maize Yield (Zea Mays L) on Sandy Loam of Northern Lombok, Eastern of Indonesia

2013 ◽  
Vol 18 (1) ◽  
pp. 53 ◽  
Author(s):  
Wahyu Astiko ◽  
Ika Rochdjatun Sastrahidayat ◽  
Syamsuddin Djauhari ◽  
Anton Muhibuddin
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Sandy Loam ◽  
Maize Yield ◽  
Cattle Manure ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Inorganic Fertilizers ◽  
Organic C

A glass house study was conducted to evaluate the contribution of indigenous arbuscular mycorrhiza fungi (AMF) in improving maize yield grown on sandy loam of Northern Lombok. The package of organic fertilizers treatments were tested including: without inoculation of mycorrhiza, inoculation mycorrhiza and no added inorganic fertilizers, inoculation of mycorrhiza with cattle manure added, inoculation of mycorrhiza with rock phosphate added and inoculation mycorrhiza with inorganic fertilizers. The treatments were arranged using a Completely Randomized Design with four replications. The results of the study show that the inoculation of AMF significantly increased soil concentration of N, available-P, K and organic-C by 37.39%, 60.79%, 66.66% and 110.15% respectively observed at 60 days after sowing (DAS). The similar trend was also found at 100 DAS, where those nutrients increased by 21.48%, 69%, 43.93% and 37.07%, respectively compared to control. The improving of soil fertility status was also reflected by nutrients uptake (i.e. N, P, K, Ca) as well as growth and yield of maize. N, P, K and Ca uptake increased by 1,608%, 1,121%, 533% and 534%, respectively. Roots and top dry biomass at 60 DAS increased by 718.40% and 337.67%, respectively. The trend increased of the biomass was followed by observation at 100 DAS. Yield components including cobs, grain and weight of 100 grains increased by 313.60%, 411.84% and 137.54%, respectively. In addition, the inoculation of AM with F2 contributed significantly to the spore numbers and root infection.[How to Cite : Astiko W, IR Sastrahidayat, S Djauhari, and A Muhibuddin. 2013. The Role of Indigenous Mycorrhiza in Combination with Cattle Manure in Improving Maize Yield (Zea Mays L) on Sandy Loam of Northern Lombok, Eastern of Indonesia. J Trop Soils, 18 (1): 53-58. doi: 10.5400/jts.2013.18.1.53][Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.1.53]

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