scholarly journals Nutritional Behavior of Heliconia Grown Under Different Levels of Lime

2019 ◽  
Vol 11 (4) ◽  
pp. 559
Author(s):  
Gisele O. de Sousa ◽  
Ismael de J. M. Viégas ◽  
Jessivaldo R. Galvão ◽  
Deivison R. da Silva ◽  
Tiago K. M. Yakuwa ◽  
...  
Keyword(s):  
Ornamental Plants ◽  
Temperate Climate ◽  
Dolomitic Lime ◽  
Nutritional Behavior ◽  
Calcium And Magnesium ◽  
Different Levels ◽  
Tropical Flowers ◽  
Medium Texture

Production and commercialization of tropical flowers and plants has grown in recent years, mainly due to the increasing value of these products in temperate climate countries, such as heliconia, one of the most cultivated tropical ornamental plants in Brazil. This study was developed to determine the effect of lime applications on the nutrients in heliconia plants (Heliconia psittacorum L. × Heliconia sparthocircinata Arist. [cv. Golden Torch]) cultivated in yellow latosol in a greenhouse. The macronutrient levels in the leaves, pseudostem and roots of the heliconia plants were determined after cultivating the plants in containers with a medium texture, yellow latosol, collected from the 0 to 20 cm layer and submitted to doses of 0, 0.9, 2.6, 4.2 and 5.9 t of lime ha-1. Nitrogen and phosphorous performed better in the absence of the correction and in the 0.9 t ha-1 dose for the vegetative parts of the heliconia plants. The application of dolomitic lime promoted greater absorption of potassium, calcium and magnesium, and sulfur performed better for the doses 2.6 and 5.9 t of lime ha-1, for the pseudostem and roots, respectively.

scholarly journals RESISTANCE OF POTATO GENOTYPES TO Meloidogyne javanica

2017 ◽  
Vol 30 (2) ◽  
pp. 536-540 ◽  
Author(s):  
JAQUELINE TAVARES SCHAFER ◽  
CESAR BAUER GOMES ◽  
ARIONE DA SILVA PEREIRA ◽  
FERNANDA FERREIRA CRUZ ◽  
DANIELLE RIBEIRO DE BARROS
Keyword(s):  
Potato Cultivar ◽  
Meloidogyne Javanica ◽  
Temperate Climate ◽  
Initial Population ◽  
Nematode Reproduction ◽  
Potato Plants ◽  
Final Population ◽  
Susceptible Control ◽  
Different Levels ◽  
Reproduction Factor

ABSTRACT The objective of this study was to evaluate the resistance of a group of clones and cultivars from the potato breeding program of Embrapa to Meloidogyne javanica. The experiment was conducted at Embrapa Temperate Climate, Pelotas / RS, under greenhouse conditions at temperatures of 25 ± 5°C. Individual potato plants of different genotypes [BRSIPR Bel, BRS F63 (Camila), CL02-05, F23-11-06, F32-02-06, F38-03-07, F189-09-06, F23-24-06 and F22-01-08], kept in pots with sterilized soil were inoculated with 5,000 eggs and J2 of M. javanica, using six replicates per treatment. The susceptible control, potato cultivar BRS Ana was inoculated with the same level of inoculum. Fifty-five days after inoculation, the number of galls on the roots of each plant was determined as well as the number of protuberances caused by nematodes in the different treatments. Then, the roots of each plant were processed for counting the number of eggs and J2, as well as determining the nematode reproduction factor (FR: final population / initial population). All genotypes were susceptible (FR> 1.00) to M. javanica. However, there were different levels of susceptibility among the cultivars tested.

scholarly journals 095 Vase Life of Cut Roses Grown in Coal Bottom Ash-amended Media: A Correlation with Tissue Calcium

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 405B-405
Author(s):  
Marlene Cross ◽  
Bradford Bearce ◽  
Rajeev Arora
Keyword(s):  
Bottom Ash ◽  
Leaf Tissue ◽  
Vase Life ◽  
Dolomitic Lime ◽  
Coal Bottom Ash ◽  
Low Calcium ◽  
High Calcium ◽  
Tissue Calcium ◽  
Calcium And Magnesium ◽  
Kinetics Of

The vase life of roses grown in coal bottom ash (CBA)-amended media was evaluated. CBA is enriched in calcium, a nutrient implicated in delaying senescence. Two rose cultivars, Cara Mia and Dakota, were grown (from started eye plants) in four media: a 50% CBA medium and a peat:vermiculite medium amended with calcitic and dolomitic lime (1:1) were used as “high calcium” media, whereas a 25% CBA medium and a peat:vermiculite medium amended with dolomitic lime only were used as “low calcium” media. Vase life of the freshly harvested roses was evaluated. Elemental analysis of the leaves showed that roses grown in the “high calcium” media had greater calcium in the leaf tissue as well as longer vase lives (12.6 and 13.5 days) when compared to those grown in the “low calcium” media (12.1 and 10.9 days). However, petal tissue Ca was not affected by media and was not correlated with vase life. Petal tissue calcium was ≈15 times lower than leaf tissue calcium. Calcium and magnesium increased in the petal tissue over the vase life of the senescing petals. A comparison of `Cara Mia' roses (vase life of 14 days) and `Dakota' roses (vase life of 8.5 days) showed that the longer-lived `Cara Mia' had lower leaf and petal calcium levels. Both varieties followed a similar kinetics of electrolyte leakage (total E.C. and K) during their respective vase lives.

scholarly journals Shading on Yield and Quality of Lettuce Cultivars in Semiarid Conditions

2019 ◽  
Vol 11 (11) ◽  
pp. 162
Author(s):  
Claudio de O. Costa Júnior ◽  
Roberto Cleiton F. de Queiroga ◽  
Caio da S. Sousa ◽  
Cidia Cilene de Figueiredo ◽  
Evandro Franklin de Mesquita ◽  
...  
Keyword(s):  
Dry Mass ◽  
Soluble Solids ◽  
Temperate Climate ◽  
Semiarid Region ◽  
State University ◽  
Aerial Shoot ◽  
Yield And Quality ◽  
Different Levels ◽  
Semiarid Conditions

Lettuce is a crop originating from temperate climate, and for this reason, when cultivated in semiarid region, characterized by high luminosity and temperature, major losses in productivity and quality occur. The objective of this work was to evaluate the influence of different levels of shade on yield and quality of lettuce cultivars in semiarid conditions. The experiment was conducted under field conditions at the Human and Agricultural Sciences Center at State University of Paraiba, Brazil, in randomized blocks with parcels divided into 4 × 4 factorial space, and four repetitions. The parcels received different shading levels (0, 30, 50 and 70%) with black polypropylene screen and sub parcels by lettuce cultivars: ‘Americana Irene’, ‘White Boston’, ‘Regina de Verão’ and ‘Green Salad Bowl’. The shading promoted higher performance in height, stem diameter, root length, pH and dry mass of lettuce plants when compared to those grown in the open-air, being the shading of 70% the more efficient. The ‘Americana Irene’ cultivar was distinguished in terms of plant height, foliage area, leaves dry mass and soluble solids, independently from the cultivation environment. With the shading, this cultivar improved the aerial shoot-root ratio and root dry mass.

scholarly journals WATER QUALITY AFFECTS CALCIUM AND MAGNESIUM REQUIREMENTS FOR AZALEA GROWING MEDIUM

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 496c-496
Author(s):  
E.W. Bush ◽  
D.A. Wall ◽  
M.L. Robbins
Keyword(s):  
Water Quality ◽  
Control Treatment ◽  
Well Water ◽  
Dolomitic Lime ◽  
Deep Well ◽  
Length Of Treatment ◽  
Growing Medium ◽  
Quality Water ◽  
Calcium And Magnesium ◽  
Epsom Salt

Calcium and magnesium medium requirements were investigated for the production of container-grown `Formosa' azalea irrigated with filtered and unfiltered deep well water. Four inch `Formosa' azalea plants were planted into 3.8 liter containers filled with an amended 4:1(v,v) pinebark:sand growing medium. Calcium and magnesium treatments were supplied by either dolomitic lime or gypsum + epsom salt at three rates. Plants irrigated with good quality water produced excellent quality plants regardless of Ca/Mg treatment. Alkaline well water containing moderate sodium levels inhibited azalea root growth. Medium amended with gypsum + epsom salt produced significantly better quality plants than did medium with dolomitic lime during 157 days of deep well irrigation. Medium pH and Na levels were significantly higher in the control treatment than in the filtered well water treatment. Growth effects of calcium and magnesium treatments were dependent upon water quality and time length of treatment.

scholarly journals Action of ethylene, 1-methylcyclopropene and silver thiosulfate in two developmental stages of potted ornamental pepper

2017 ◽  
Vol 23 (3) ◽  
pp. 240
Author(s):  
Paula Cristina Carvalho Lima ◽  
Milena Maria Tomaz Oliveira ◽  
Wellington Souto Ribeiro ◽  
Lucas Cavalcante Costa ◽  
Fernando Luiz Finger
Keyword(s):  
Developmental Stages ◽  
Ornamental Plants ◽  
Leaf Abscission ◽  
Ethylene Inhibitors ◽  
Development Stages ◽  
Potted Plants ◽  
Ethylene Action ◽  
Stage 1 ◽  
Early Developmental ◽  
Different Levels

The species of Capsicum genus have great genetic variability with enormous potential for marketing as ornamental potted plants. The exposure at ethylene induces various deleterious responses during plants life cycle, but there are few studies on how the ethylene affects early developmental stages of these ornamental plants. Thus, this study aimed to evaluate the effects of the application of ethylene and ethylene inhibitors, 1-methylcyclopropene (1-MCP) and silver thiosulphate (STS) in two early development stages (seedling or initial flowering) of potted ornamental peppers of the cultivars ‘Calypso’ and ‘MG 302’. Cultivar ‘MG 302’ showed intermediate sensitivity to ethylene, while the cultivar ‘Calypso’ showed complete abscission of leaves when exposed to 10 µl of ethylene for 48 hours in both development stages. Plants treated with 1-MCP showed similar durability to control for both varieties and developmental stages, and the treatment with 1-MCP + ethylene was beneficial only for ‘MG 302’. STS was the most efficient substance in delaying the ethylene, wherein at stage 1 there was no leaf abscission and at stage 2 had much reduced leaf abscission occurred, regardless the cultivar. Treatment with STS + ethylene was efficient only at stage 1 for ‘Calypso’ and at stage 2 for ‘MG 302’. According to the data, cultivars showed different levels of sensitivity to ethylene, ‘Calypso’ is very sensitive and ‘MG 302’ showed intermediate sensitivity. Regardless the cultivar, STS treatment significantly blocked the ethylene action in both development stages and the use of 1-MCP was less efficient

scholarly journals Investigate the influence of halloysite and activated carbon mixtures in phytostabilization of Pb-contaminated soil with Lolium perenne L.

2017 ◽  
Vol 49 (2) ◽  
pp. 69-80
Author(s):  
Maja Radziemska
Keyword(s):  
Activated Carbon ◽  
Contaminated Soil ◽  
Laboratory Tests ◽  
Soil Mass ◽  
Soil Samples ◽  
Lead Contamination ◽  
Soil Lead ◽  
Sodium Calcium ◽  
Calcium And Magnesium ◽  
Different Levels

Abstract A pot experiment was conducted to investigate the effects of halloysite and activated carbon mixtures on the biomass and distribution of macronutrients (Mg, K, Ca, Na, P) in ryegrass grown in Pb-contaminated soil. The soil was spiked with four different levels of lead contamination, i.e. 0 (control), 200, 400, 800 mg·kg−1 were applied in an analytical grade Pb(NO3)2 solution mixed thoroughly with the soil. Raw halloysite (3%) and activated carbon (1% relative to soil mass) mixtures were used to reduce the effect of soil lead contamination. Ryegrass of the Bokser variety was harvested after 42 days, and soil samples were collected for laboratory tests. The mixture of sorbents applied in the experiment which turned out to be most effective at doses of lead amounting to 400 and 800 mg·kg−1 of soil, with the increase in the yield of ryegrass being the highest. Increasing contamination of soil with lead in the series without the mixture of sorbents increased the contents of phosphorus, sodium, calcium and magnesium in ryegrass. The applied mixture of halloysite and activated carbon changed the macronutrient concentration in ryegrass, with the greatest changes found in that of potassium and sodium.

scholarly journals Pathogenicity and aggressiveness of Colletotrichum gloeosporioides isolates in ornamental pepper

2016 ◽  
Vol 46 (3) ◽  
pp. 321-326 ◽  
Author(s):  
Neilton Antonio Fiusa Araújo ◽  
Joana D´arc Mendes Vieira ◽  
Marlene da Rocha Moura ◽  
Wagner Rogério Leocádio Soares Pessoa ◽  
Beatriz Meireles Barguil
Keyword(s):  
Environmental Conditions ◽  
Colletotrichum Gloeosporioides ◽  
Ornamental Plants ◽  
Assessment Period ◽  
Grading Scale ◽  
Different Levels

ABSTRACT Anthracnose, a disease caused by fungi of the Colletotrichum genus, affects many crops, including ornamental plants. This study aimed at evaluating the pathogenicity and aggressiveness of the Colletotrichum gloeosporioides Penz. (Sacc.) isolates Cg1 (papaya), Cg2 (guava) and Cg3 (mango) in the ornamental pepper varieties Stromboli, Etna and Pirâmide, during two different periods (July/August and November/December 2013). The fungi pathogenicity and the severity of plant symptoms were assessed using a grading scale. The three C. gloeosporioides isolates were pathogenic to the three ornamental pepper varieties studied, exhibiting different levels of aggressiveness among them. The environmental conditions influenced the isolates aggressiveness, with the most severe symptoms observed in the second assessment period.

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Immunoenzymatic demonstration of the simultaneous presence of transferrin, hemopexin and albumin in a same hepatocyte and their ultrastructural localization

1978 ◽  
Vol 36 (2) ◽  
pp. 88-89
Author(s):  
M. Kraemer ◽  
J. Foucrier ◽  
J. Vassy ◽  
M.T. Chalumeau
Keyword(s):  
Plasma Proteins ◽  
Rat Hepatocytes ◽  
Ultrastructural Localization ◽  
Carrier Proteins ◽  
Normal Cells ◽  
Adult Rat ◽  
Adult Rat Hepatocytes ◽  
Monospecific Antisera ◽  
Different Levels

Some authors using immunofluorescent techniques had already suggested that some hepatocytes are able to synthetize several plasma proteins. In vitro studies on normal cells or on cells issued of murine hepatomas raise the same conclusion. These works could be indications of an hepatocyte functionnal non-specialization, meanwhile the authors never give direct topographic proofs suitable with this hypothesis.The use of immunoenzymatic techniques after obtention of monospecific antisera had seemed to us useful to bring forward a better knowledge of this problem. We have studied three carrier proteins (transferrin = Tf, hemopexin = Hx, albumin = Alb) operating at different levels in iron metabolism by demonstrating and localizing the adult rat hepatocytes involved in their synthesis.Immunological, histological and ultrastructural methods have been described in a previous work.

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