scholarly journals Lead uptake and tolerance of Ricinus communis L.

2006 ◽  
Vol 18 (4) ◽  
pp. 483-489 ◽  
Author(s):  
Solange Romeiro ◽  
Ana M.M.A. Lagôa ◽  
Pedro R. Furlani ◽  
Cleide A. de Abreu ◽  
Mônica F. de Abreu ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Ricinus Communis ◽  
Block Design ◽  
Physiological Responses ◽  
Tropical Species ◽  
Lead Uptake ◽  
Nutritive Solution ◽  
Ricinus Communis L ◽  
Light Concentration ◽  
Set Up

Phytoextraction is an important technique used for the decontamination of areas polluted by lead. Consequently, an understanding of the physiological responses to tolerance of tropical species subjected to increasing levels of contamination is fundamental before considering their use as phytoextractors in contaminated areas. The objective of this study was to assess the lead (Pb) uptake and the tolerance of Ricinus communis L. The plants were cultivated in nutrient solution in a greenhouse under controlled conditions. Lead was tested at concentrations of 0, 100, 200 and 400 µmol L-1. The experimental set-up was a block design, using a 4 x 1 factorial scheme, with three replicates. Biometric analyses, photosynthesis rates, and Pb content in the nutritive solution as well as in roots and shoots were performed. In conclusion, R. communis L is a hyperaccumulator species for Pb and presents tolerance properties in lead light concentration.

scholarly journals Assessment of Genetic Diversity of Promising Castor Been (Ricinus communis L.) Genotypes in Nigeria

2019 ◽  
Vol 11 (3) ◽  
pp. 467-474
Author(s):  
Bolaji Zuluqurineen SALIHU ◽  
Olamide Ahmed FALUSI ◽  
Adeyinka Olufemi ADEPOJU ◽  
Ibrahim Wasiu AROLU ◽  
Oladipupo Yusuf DAUDU ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Diversity Index ◽  
Gene Diversity ◽  
Ricinus Communis ◽  
Polymorphic Information Content ◽  
Block Design ◽  
Genetic Material ◽  
Morphological Data ◽  
Research Attention ◽  
Ricinus Communis L

Castor oil plant (Ricinus communis L.) is an important oil crop with little research attention in Nigeria. In the present research, extent of genetic diversity among 20 Nigerian castor genotypes was determined using morphological descriptors and molecular markers. The genotypes were laid out on a randomized complete block design with three replicated plots. Molecular genotyping of the genotypes was carried out using genomic Simple Sequence Repeats (SSR). The genotypes revealed high divergence in seed colour, seed shape, seed mottle, seed caruncle and seed sizes. Seedling establishment varied from 70.18% (in Acc. 006) to 93.25% (Acc. 001) with average mean of 81.53%. Raceme length ranged from 15.90 cm to 29.54 cm with population mean of 20.80 cm. The highest seed yield (1222.98 kg/ha) was recorded in Acc. 001 and the least (611.46 kg/ha) was observed in Acc. 006. Seed oil content varied between 32.15% in Acc. 042 and 54.03% in Acc. 006. Agglomerative cluster dendrogram constructed from morphological data showed random distribution of the genotypes into three cluster groups irrespective of the sources/collection points. The genetic diversity based on SSR Marker Analysis revealed high average expected heterozygosity (0.74), Polymorphic information content (0.68), Nei’s gene diversity index (0.72) and Shannon's Information index (1.43). The dendrogram constructed from molecular data grouped the twenty genotypes into three groups at coefficient of 0.34. From these findings, it showed that the twenty genotypes evaluated are divergent in nature and they could serve as good genetic material for castor breeding in Nigeria.

scholarly journals IDENTIFICATION OF Ricinus communis HYBRIDS FOR LOW PLANT HEIGHT1

2021 ◽  
Vol 34 (4) ◽  
pp. 837-845
Author(s):  
FREDSON DOS SANTOS MENEZES ◽  
SIMONE ALVES SILVA ◽  
GEAN CARLO SOARES CAPINAN ◽  
HELISON SANTOS BRASILEIRO ◽  
LAURENICE ARAÚJO DOS SANTOS
Keyword(s):  
Plant Height ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Block Design ◽  
Direct Selection ◽  
Randomized Block Design ◽  
Ricinus Communis L ◽  
Bean Plants ◽  
Stem Internode ◽  
High Heritability

ABSTRACT Castor bean (Ricinus communis L.) is a plant native to Africa that presents important socioeconomic value for many countries, and has been the subject of breeding programs. In this context, the objective of this work was to identify genotypes with potential for improvement, focused on lowering plant height, using 19 hybrids and eight parents of R. communis. The study was developed at the experimental area of the Federal University of Recôncavo da Bahia in Cruz das Almas, BA, Brazil. The experiment was conducted in 2017 using a randomized block design with three replications, consisting of eight parents and 19 hybrids resulting from hybridization of these parents, grown with spacing of 3 meters between rows and 1 meter between plants. The characters stem diameter (SD), primary raceme insertion height (PRI), number of stem internodes (NSI), mean stem internode length (SIL), plant height (PH), number of harvested racemes (NHR), primary raceme length (PRL), and effective raceme length (ERL) were evaluated by analyzing the genetic parameters of variances and correlation between them. Five (H17, H2, H11, H13, and H6) of the 19 hybrids evaluated have potential to decrease PH of castor bean plants, presenting heights below 1.07 m. Direct selection for plant height is the most indicated for this purpose due to the high heritability of the character. However, the characters SD, PRI, and SIL stood out by assisting in indirect selection to decrease plant height because they can be early measured and present high heritability and strong correlation with PH.

scholarly journals Wheat cultivar tolerance to boron deficiency and toxicity in nutrient solution

2003 ◽  
Vol 60 (2) ◽  
pp. 359-370 ◽  
Author(s):  
Ângela Maria Cangiani Furlani ◽  
Cristiane Pierrotte Carvalho ◽  
José Guilherme de Freitas ◽  
Marcelo Fontanetti Verdial
Keyword(s):  
Nutrient Solution ◽  
Dry Matter ◽  
Block Design ◽  
Triticum Aestivum L ◽  
Boron Deficiency ◽  
Nutrient Contents ◽  
Plant Parts ◽  
Whole Plant ◽  
Spike Number ◽  
Set Up

Field symptoms of open spikelets in wheat were observed in specific cultivars and supposedly related to low B soils and differential B requirement among cultivars. This study aimed to evaluate the response of four wheat (Triticum aestivum L.) cultivars, IAC 24, IAC 60, IAC 287 and IAC 289, to increasing B concentrations in nutrient solution. The experiment was set up in a randomized complete block design, with four replicates and five B concentrations (0.0, 0.05, 0.2, 0.8 and 2.0 mg L-1), during 1997/1998, in a greenhouse. Plants were grown to maturity and evaluated for plant height, spike number and length, open spikelet number, grains per spike, plant parts dry matter, B, P, K, Ca and Mg leaf concentrations and total nutrient contents. The visual symptoms of B deficiency consisted of open spikelets, distorted spikes without grains. 'IAC 60' and 'IAC 287' had higher B efficiency, with the highest grain yields in lower B concentrations. The 'IAC 287' and 'IAC 24' were more tolerant to the highest B concentrations. 'IAC 24' required more B for grain production as compared to the other cultivars. The critical leaf B concentration for deficiency was 25 mg kg-1 of dry matter tissue for all cultivars, and for toxicity were: 44 to 45 mg kg-1 for 'IAC 60' and 'IAC 289'; 228 and 318 mg kg-1 for 'IAC 24' and 'IAC 287', respectively. Except for the highest B level in the nutrient solution, the leaf P, K, Ca and Mg concentrations and whole plant contents were in an adequate range in the plants and did not vary among cultivars.

scholarly journals Salinity and nitrogen doses in the production and oil content of castor bean

2019 ◽  
Vol 40 (6Supl2) ◽  
pp. 2851
Author(s):  
Allan Nunes Alves ◽  
Hans Raj Gheyi ◽  
José Amilton Santos Junior ◽  
Fernando José da Silva Junior ◽  
Frederico Antônio Loureiro Soares ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Brackish Water ◽  
Oil Content ◽  
Ricinus Communis ◽  
Block Design ◽  
Fruit Weight ◽  
Nitrogen Levels ◽  
Randomized Block Design ◽  
Ricinus Communis L ◽  
Salinity Levels

The proper management of irrigation and mineral nutrition is critical to the success of crops, especially crops grown under salt stress conditions. The objective of this study was to evaluate the production and oil content of castor plants (Ricinus communis L.) irrigated with brackish water with different salinity levels (0.6, 1.6, 2.6, 3.6, and 4.6 dS m-1) and grown under different nitrogen levels (50, 75, 100, 125, and 150 mg of N kg-1 soil). These treatments were arranged in a completely randomized block design with a 5 ? 5 factorial scheme and three repetitions, totaling 75 experimental units. The interaction effect between salinity levels and nitrogen levels affected fruit weight per plant and oil content, and irrigation with brackish water with an electrical conductivity starting at 0.6 dS m-1 reduced the number of racemes per plant, number of fruits, and the weight of fruits and seeds.

scholarly journals CRESCIMENTO E PRODUÇÃO DA MAMONEIRA BRS GABRIELA EM FUNÇÃO DA ADUBAÇÃO ORGÂNICA E NÍVEIS DE ÁGUA

Irriga ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 196
Author(s):  
Evandro Franklin de Mesquita ◽  
Francisco Vanies da Silva Sá ◽  
Paula Lorrane Melo de Jesus ◽  
Cesenildo Figueiredo Suassuna ◽  
Albanisa Pereira de Lima Santos ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Availability ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Block Design ◽  
Organic Fertilizer ◽  
Water Levels ◽  
Experimental Unit ◽  
Ricinus Communis L ◽  
E Mail

CRESCIMENTO E PRODUÇÃO DA MAMONEIRA BRS GABRIELA EM FUNÇÃO DA ADUBAÇÃO ORGÂNICA E NÍVEIS DE ÁGUA  EVANDRO FRANKLIN DE MESQUITA1; FRANCISCO VANIES DA SILVA SÁ2; PAULA LORRANE MELO DE JESUS3; CESENILDO FIGUEIREDO SUASSUNA3; ALBANISA PEREIRA DE LIMA SANTOS 3 E EMANOELA PEREIRA DE PAIVA4 1Engenheiro Agrônomo, Doutor em Engenharia Agrícola, Professor Adjunto, Centro de Ciências Humanas e Agrarias (CCHA), Universidade Estadual da Paraíba (UEPB), Catolé do Rocha, PB, e-mail: [email protected] Engenheiro Agrônomo, Doutorando em Engenharia Agrícola, Universidade Federal de Campina Grande – UFCG, Centro Tecnologia e Recursos Naturais – CTRN, Campina Grande - PB, Brasil. E-mail: [email protected] Licenciado em Ciências Agrárias, Centro de Ciências Humanas e Agrarias (CCHA), Universidade Estadual da Paraíba (UEPB), Catolé do Rocha, PB, e-mail: [email protected]; [email protected]; [email protected] Engenheira Agrônomo, Doutoranda em Fitotecnia, Departamento de Ciências Vegetais, Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN. E-mail: [email protected].  1 RESUMO Objetivou-se estudar o crescimento e a produção da mamoneira (Ricinus communis L.) BRS Gabriela em função de doses de matéria orgânica e água disponível no solo. O experimento foi conduzido no período de agosto de 2013 a janeiro de 2014, em estufa agrícola nas dependências da Universidade Estadual da Paraíba, Campus IV, Catolé do Rocha-PB. O delineamento experimental adotado foram os blocos casualizados e os tratamentos foram distribuídos em esquema fatorial 5 x 4, sendo o primeiro fator constituído por 5 doses de húmus de minhoca a base de esterco bovino (0; 5; 10; 15 e 20 % do volume do vaso) e o segundo em 4 níveis de água disponível no solo (70; 80; 90 e 100%), resultando em 20 tratamentos, com três repetições e 1 planta por repetição, totalizando 60 unidades experimentais. Cada unidade experimental foi constituída de um vaso plástico com capacidade para 30 L e uma planta de mamoneira BRS Gabriela. Aos 120 dias após a semeadura as plantas foram avaliadas quanto ao crescimento e produção. De maneira geral o maior crescimento foi alcançado pelas plantas cultivadas nos maiores regimes hídricos e adubadas com 6 L de húmus. Respostas positivas da adubação orgânica sob a produção da mamoneira forma obtidas em condições de disponibilidade de água superiores a 90% da capacidade de campo. As plantas cultivadas com 100% da disponibilidade de água no solo, sob a dose de 6L de húmus de minhoca a base de esterco bovino obtiveram as maiores produções. Palavras-chave: Ricinus communis L., irrigação, húmus de minhoca.  MESQUITA, E.F.; SÁ, F.V.S.; JESUS, P.L.M.; SUASSUNA, C.F.; SANTOS, A. P. L.; PAIVA, E.P.GROWTH AND PRODUCTION OF CASTOR BRS GABRIELA A FUNCTION OF ORGANIC FERTILIZER AND WATER LEVELS  2 ABSTRACT Aimed to study the growth and production of castor bean (Ricinus communis L.) BRS Gabriela as a result of the levels of organic matter and soil water availability. The experiment was conducted from August 2013 to January 2014, in a greenhouse on the premises of the State University of Paraíba, Campus IV, Catolé Rocha-PB, Brazil. The experimental design was a randomized block design and the treatments were arranged in a factorial 5 x 4, with the first factor consists of 5 doses of earthworm humus as a base of cattle manure (0, 5, 10, 15 and 20% of vessel volume) and the second in four levels of available soil water (70, 80, 90 and 100%), resulting in 20 treatments with three replications and 1 plant per repetitions, totalizing 60 experimental units. Each experimental unit consisted of a plastic container with a capacity of 30 L and a castor bean plant BRS Gabriela. At 120 days after planting we evaluated growth and production. In general the highest growth was achieved by plants grown in the largest water regimes, fertilized with 6 L of earthworm humus. Positive responses of organic fertilizer in the production of castor bean form obtained in water availability conditions above 90% of field capacity. Plants grown with 100% availability of water in the soil, in the dose of 6L earthworm humus the basis of manure obtained the highest yields. Keywords: Ricinus communis L., irrigation, earthworm humus 

scholarly journals Physiological responses of watercress to brackish waters and different nutrient solution circulation times

2020 ◽  
Vol 41 (6) ◽  
pp. 2555-2570
Author(s):  
Camila Alves de Souza ◽  
◽  
Alexsandro Oliveira da Silva ◽  
Claudivan Feitosa de Lacerda ◽  
Ênio Farias de França e Silva ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Nutrient Solution ◽  
Brackish Water ◽  
Root Length ◽  
Agricultural Development ◽  
Block Design ◽  
Physiological Responses ◽  
Stem Diameter ◽  
Randomized Block Design ◽  
Salinity Levels

Water scarcity and the use of brackish water are the main challenges for agricultural development. In view of this, the present study proposes to examine physiological responses of the broadleaf-cress crop in an NFT hydroponics system according to the use of brackish water and nutrient solution circulation times. The treatments were distributed in a randomized block design with five water salinity levels (ECw: 0.6, 1.6, 2.6, 3.6 and 4.6 dS m-1) and two nutrient solution circulation times (T1 = 10 min and T2 = 15 min), totaling 10 treatments with four replicates, which resulted in 40 experimental plots. The following variables were analyzed: net photosynthetic rate, stomatal conductance, transpiration, leaf proline content, shoot moisture content, stem diameter and root length. The maximum observed photosynthetic rates were 20.9 mmol m-2 s-1 (T1) and 20.0 mmol m-2 s-1 (T2). Maximum stomatal conductance was 0.44 mol m-2 s-1, which decreased by 63.4% at the highest salinity level. The increasing ECw levels in both growing cycles evaluated reduced gas exchanges, stem diameter and root length. The nutrient solution circulation time of 15 min provided the most satisfactory results for the analyzed variables.

scholarly journals Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

2017 ◽  
Vol 47 (4) ◽  
Author(s):  
Adielle Rodrigues da Silva ◽  
Simone Alves Silva ◽  
Vanessa de Oliveira Almeida ◽  
Gilmara de Melo Araújo ◽  
Carlos Alberto da Silva Ledo
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Block Design ◽  
Fruit Weight ◽  
Flowering Plant ◽  
Germplasm Bank ◽  
Randomized Block Design ◽  
Ricinus Communis L ◽  
Parental Lines ◽  
Track Analysis

ABSTRACT: As castor bean (Ricinus communis L.) reveals immense adaptability to various ecological conditions and due to its socioeconomic significance, new studies have emerged primarily to develop more productive cultivars to suit different regions in Brazil. This study aimed to confirmthe correlations and direct and indirect effects of the morphoagronomic descriptors on castor bean productivity, employing correlation studies and track analysis. Between 2014 and 2015, experiments utilizing the randomized block design were performed, with four replications, which included 208 treatments involving pedigree and parental lines of castor bean, drawn from the germplasm bank of the Universidade Federal do Recôncavo da Bahia. Variables in the correlation analysis included primary racemic insertion, stem diameter, number of stem internodes, plant flowering, plant height, racemic length, number of fruits per raceme, fruit weight per raceme, seed yield per fruit and productivity. Correlations among the variables analyzed were imposed, via track analysis, on the direct and indirect influences of the morphoagronomic descriptors on productivity. The most direct and positively influential descriptors included fruit weight per raceme and number of seeds per raceme; the most direct albeit negatively influential descriptors are the number of internodes on the stem and flowering. Therefore, lines with less number of internodes and requiring fewer days to bloom are more highly productive. These descriptors can thus effectively identify the productive lines.

Soil response to chemicals used in a field experiment

2013 ◽  
Vol 27 (2) ◽  
pp. 151-158 ◽  
Author(s):  
S. Jezierska-Tys ◽  
A. Rutkowska
Keyword(s):  
Alkaline Phosphatase ◽  
Enzymatic Activity ◽  
Field Experiment ◽  
Soil Microorganisms ◽  
Block Design ◽  
Soil Samples ◽  
Alkaline Phosphatases ◽  
Soil Response ◽  
Negative Effect ◽  
Set Up

Abstract The effect of chemicals (Reglone 200 SL and Elastiq 550 EC) on soil microorganisms and their enzymatic activity was estimated. The study was conducted in a field experiment which was set up in the split-block design and comprised three treatments. Soil samples were taken six times, twice in each year of study. The results showed that the application of chemicals generally had no negative effect on the number of soil microorganisms. The application of Reglone 200 SL caused an increase of proteolytic and ureolytic activity and affected the activity of dehydrogenases, acid and alkaline phosphatases in the soil. The soil subjected of Elastiq 550 EC was characterized by lower activity of dehydrogenases, protease, urease and alkaline phosphatase.

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