scholarly journals Effects of vitamin pre-sowing treatment on sweet maize seedlings irrigated with saline water

2020 ◽  
Vol 69 (1) ◽  
pp. 20-25
Author(s):  
Eduardo Pradi Vendruscolo ◽  
Alexsander Seleguini
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Dry Matter ◽  
Saline Water ◽  
Initial Growth ◽  
Initial Development ◽  
Combined Application ◽  
Maize Seeds ◽  
Negative Effect ◽  
Combined Solution

Salinity stress represents an obstacle for the production of plants of commercial interest, including sweet maize.  Among the techniques used to suppress the effects caused by excess salts in the soil is the exogenous application of vitamins.  Thus, the objective of this study was to evaluate the effect of the pre-sowing treatment of sweet maize seeds in solutions of thiamine, niacin and these two vitamins combined on the development of the plants irrigated with saline water.  The treatments were composed by the 24 h pre-sowing treatment with water, thiamine solution (thiamine 100 mg L-1), niacin solution (niacin 100 mg L-1) and a combined solution with these two vitamins (thiamine 50 mg L-1 + niacin 50 mg L-1) irrigated with saline water.  A control (pre-sowing treatment with water and irrigation with non-saline water) was also used.  It was observed that salinity stress affects the sweet maize initial development. Application of isolate thiamine or niacin and its combined application improves the relative contents of chlorophyll ‘a’ and total, height of shoot, leaf number, diameter of stem and shoot, root and total dry matter, reducing dry matter losses by 8.89%, 25.46% and 39.60%, respectively.  Soaking seeds for 24 h in thiamine and niacin solutions improve the initial growth of sweet maize plants under salt stress and a combined vitamin solution (thiamine 50 mg L-1 + niacin 50 mg L-1) effectively reduces the salt stress negative effect on the initial development of these plants. 

scholarly journals ÁGUA SALINA E SUBSTRATOS NO CRESCIMENTO INICIAL DO MELOEIRO

Irriga ◽  
2017 ◽  
Vol 22 (3) ◽  
pp. 469-484 ◽  
Author(s):  
Maria Ângela Casimiro Lopes ◽  
Rafael Vitor da Silveira Muniz ◽  
Samara Sibelle Vieira Alves ◽  
Aline Costa Ferreira ◽  
Francisco Vanies da Silva Sá ◽  
...  
Keyword(s):  
Salt Stress ◽  
Organic Compound ◽  
Irrigation Water ◽  
Cucumis Melo ◽  
Dry Matter ◽  
Water Salinity ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Irrigation Water Salinity ◽  
Cucumis Melo L

ÁGUA SALINA E SUBSTRATOS NO CRESCIMENTO INICIAL DO MELOEIRO   MARIA ÂNGELA CASIMIRO LOPES1; RAFAEL VITOR DA SILVEIRA MUNIZ1; SAMARA SIBELLE VIEIRA ALVES2; ALINE COSTA FERREIRA1; FRANCISCO VANIES DA SILVA SÁ3 E LUDERLÂNDIO DE ANDRADE SILVA3 1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Pombal, PB, Brasil, [email protected], [email protected], [email protected] Unidade Acadêmica de Garanhuns, Universidade Federal Rural do Pernambuco, UFRPE, Garanhuns, PE, Brasil, [email protected] Centro de Ciências e Recursos Naturais, Universidade Federal de Campina Grande, UFCG, Campina Grande, PB, Brasil, [email protected], [email protected]  1 RESUMO Objetivou-se estudar a produção de mudas de meloeiro em função de diferentes substratos irrigados com água salina. O experimento foi desenvolvido em casa de vegetação no município de Pombal, Paraíba PB, no período de abril a maio de 2015. Adotou-se o delineamento experimental inteiramente casualizado, em esquema fatorial 4 x 3 x 2 constituído de quatro níveis de salinidade da água de irrigação - CEa (0,3; 1,5; 3,0 e 4,5 dS m-1) e três substratos [S1= solo; S2= solo + composto orgânico (2:1); e S3 = solo + esterco bovino (2:1)], e duas variedades de melão (V1= Melão Gaúcho Casca de Carvalho; V2= Hales Best Jumbo), com quatro repetições e três plantas úteis por repetição. As plantas foram conduzidas em recipientes com capacidade de 0,5 dm3 durante 32 dias após a semeadura, quando foram avaliadas quanto ao crescimento e acúmulo de matéria seca. O crescimento e o acúmulo de matéria seca de ambas as variedades foram reduzidos com o aumento da salinidade da água de irrigação. O crescimento e acúmulo de massa seca da variedade Hales Best Jumbo no substrato constituído de solo com composto orgânico foi menos afetado pelo estresse salino. A variedade Gaúcho Casca de Carvalho é a mais sensível ao estresse salino independente do substrato utilizado. Palavras-chave: Cucumis melo L.; estresse salino, composto orgânico.  LOPES, M. A. C.; MUNIZ, R. V. S.; ALVES, S. S. V.; FERREIRA, A. C.; SÁ, F. V. S.; ANDRADE SILVA, L. A.SALINE WATER AND SUBSTRATES ON INITIAL GROWTH IN MELON  2 ABSTRACT The aim was to study the production of melon seedlings for different substrates irrigated with saline water. The experiment was conducted in a greenhouse in the city of Pombal, Paraíba, PB, in the period April-May 2015. We adopted a completely randomized design in a factorial 4 x 3 x 2 design, consisting of four levels of irrigation water salinity (0.3, 1.5, 3.0 and 4.5 dS m-1) and three substrates [S1= ground; S2= soil + organic compound (2:1); and S3= soil + manure (2:1)] , and two varieties of melon (V1 = Gaúcho Casca de Carvalho; V2 = Hales Best Jumbo), with four replications and three plants per repetition. Plants were kept in containers with a capacity of 0.5 dm3 for 32 days after sowing, when they were evaluated for growth and accumulation of dry matter. Growth and dry matter accumulation of both varieties were reduced with increasing irrigation water salinity. The growth and accumulation of dry mass of the Hales Best Jumbo variety in the substrate composed of soil with organic compost was less affected by salt stress. The Gaúcho Casca de Carvalho variety is the most sensitive to salt stress regardless of the substrate used. Keywords: Cucumis melo L., salt stress, organic compound

scholarly journals Germination and initial development of Simira gardneriana M.R. Barbosa & Peixoto (Rubiaceae) seedlings under different temperatures and salinity levels

2019 ◽  
Vol 40 (3) ◽  
pp. 1023
Author(s):  
Fabrícia Nascimento de Oliveira ◽  
Thiago Hadady da Silva Castro ◽  
Salvador Barros Torres ◽  
Narjara Walessa Nogueira ◽  
Rômulo Magno Oliveira de Freitas
Keyword(s):  
Thermal Stress ◽  
Dry Matter ◽  
Initial Moisture Content ◽  
Shoot Length ◽  
Water Salinity ◽  
Initial Development ◽  
Irrigation Water Salinity ◽  
Different Temperatures ◽  
Negative Effect ◽  
Salinity Levels

Simira gardneriana M.R. Barbosa & Peixoto (Rubiaceae) is a species exclusive to the Caatinga biome. It is used as forage, firewood, and in the construction of fence posts. Species from this biome are constantly subjected to abiotic stresses, including salt and thermal stress. Thus, we evaluated the effect of irrigation water salinity on the germination and initial development of S. gardneriana seedlings at different temperatures. The experiment used seeds with an initial moisture content of about 12.32%, arranged in a factorial scheme with eight levels of salinity, obtained by the addition of sodium chloride (NaCl), diluted in distilled water at concentrations of 0.0 (control), 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, and 7.5 dS m-1, and the four temperatures 25, 30, 35, and 20-30°C, in four replicates of 25 seeds each. Salinity and temperature effects were evaluated based on germination, germination speed index, seedling shoot length, root length, shoot dry matter, root dry matter, and total dry matter. Increasing water salinity levels interfered with all variables analyzed in the germination of S. gardneriana seeds, especially at a temperature of 35°C. At temperatures of 25 and 30°C, seed germination and initial development were less affected by salinity. Simira gardneriana seeds are sensitive to salinity caused by the increase in NaCl from 1.5 dS m-1, which indicates a low tolerance of this species to saline environments. Our results show that the negative effect on the germination and initial development of S. gardneriana seedlings can be explained by the increase in salt levels and temperature, reducing their capacity to absorb water and nutrients, which indicates sensitivity responses of this species to salinity and thermal stress.

scholarly journals Métodos de aplicação de diferentes concentrações de H2O2 em milho sob estresse salino

2016 ◽  
Vol 11 (3) ◽  
pp. 01
Author(s):  
Evandro Manoel da Silva ◽  
Francisco Hélio Dantas Lacerda ◽  
Aldair de Souza Medeiros ◽  
Leandro de Pádua Souza ◽  
Francisco Hevilásio Freire Pereira
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Antioxidant Defense ◽  
Saline Water ◽  
Foliar Spray ◽  
Antioxidant Defense System ◽  
Experimental Unit ◽  
Initial Growth ◽  
Maize Plants ◽  
Hybrid Maize

<p>A aplicação exógena de H<sub>2</sub>O<sub>2</sub> tem demonstrado eficiência na aclimatação das plantas aos estresses bióticos e abióticos devido estimular a ativação do sistema de defesa antioxidativo. Neste sentido, objetivou-se com o trabalho avaliar a influência do método de aplicação de diferentes concentrações de H<sub>2</sub>O<sub>2 </sub>sobre o crescimento inicial de plantas de milho irrigadas água salina. O experimento foi conduzido em ambiente protegido, com os tratamentos dispostos em delineamento inteiramente casualizado, em esquema fatorial 5 x 2, correspondente as concentrações de peróxido de hidrogênio (H<sub>2</sub>O<sub>2</sub>) de 0; 5; 10; 15 e 20 µmol L<sup>-1 </sup>aplicados na semeadura via água de irrigação e, pulverização foliar aos 15 dias após a semeadura (DAS), com quatro repetições e unidade experimental constituída por um vaso de 3 L contendo duas plantas de milho híbrido 4051. As plantas foram irrigadas com água de CE de 2,0 dS m<sup>-1</sup>. As 28 DAS verificou-se que a aplicação de H<sub>2</sub>O<sub>2 </sub>na semeadura e através de pulverização foliar promove aclimatação de plantas de milho à salinidade da água de irrigação, aumentando a tolerância ao estresse salino. O maior crescimento inicial do milho é obtido nas concentrações de H<sub>2</sub>O<sub>2</sub> variando de 7 a 8 µmol L<sup>-1</sup>, sendo mais eficiente a aplicação na semeadura. O pré-tratamento de plantas de milho com H<sub>2</sub>O<sub>2</sub> a partir de 15 µmol L<sup>-1</sup> incrementa o estresse, promovendo maiores danos ao crescimento vegetativo.</p><p align="center"><strong><em>Application methods of different concentrations of H<sub>2</sub>O<sub>2</sub> in maize under salt stress</em></strong></p><p><strong>Abstract</strong><strong>:</strong> Exogenous application of H<sub>2</sub>O<sub>2</sub> has established efficiency in acclimatization of plants to biotic and abiotic stresses due to stimulate the activation of antioxidant defense system. In this context, it was aimed with this work evaluate the effect of application method of different concentrations of H<sub>2</sub>O<sub>2</sub> on initial growth of maize plants irrigated saline water. The experiment was conducted in a greenhouse, with the treatments in a randomized completely design in a factorial 5 x 2 corresponding the hydrogen peroxide concentrations (H<sub>2</sub>O<sub>2</sub>) 0; 5; 10; 15:20 µmol L<sup>-1</sup> applied in sowing by irrigation water and foliar spray at 15 days after sowing (DAS), with four repetitions and experimental unit consisting of vessel a 3 L containing two plants hybrid maize 4051. The plants were irrigated with EC water of 2.0 dS m<sup>-1</sup>. The 28 DAS  it was found what the application H<sub>2</sub>O<sub>2</sub> at sowing and foliar spraying promote acclimatization of maize plants at salinity irrigation water, increasing tolerance to salt stress.  The more initial growth of maize is obtained in H<sub>2</sub>O<sub>2</sub> concentrations ranging from 7 to 8 µmol L<sup>-1</sup>, being more efficient the application at sowing. The pretreatment of maize plants with H<sub>2</sub>O<sub>2</sub> from 15 µmol L<sup>-1</sup> increasing stress, promoting further damage to vegetative growth.</p>

scholarly journals Initial Development and Tolerance of Bell Pepper (Capsicum annuum) Cultivars under Salt Stress

2017 ◽  
Vol 9 (11) ◽  
pp. 181 ◽  
Author(s):  
Francisco V. da S. Sá ◽  
Lauter S. Souto ◽  
Emanoela P. de Paiva ◽  
Erbia B. G. Araújo ◽  
Fernanda A. de Oliveira ◽  
...  
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Bell Pepper ◽  
Water Salinity ◽  
Tolerance Index ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Initial Development ◽  
Randomized Design ◽  
Irrigation Water Salinity

The objective was to evaluate growth and tolerance of bell pepper cultivars under salt stress in the seedling stage. The experiment was carried out in protected environment (greenhouse) at the Center of Sciences and Agrifood Technology (CCTA) of the Federal University of Campina Grande (UFCG), located in the municipality of Pombal, Paraíba, from August to September 2014. Five bell pepper cultivars (C1 - Dulce All Big; C2 - All Big; C3 - Italiano Amarelo Gigante; C4 - Rubi Gigante; C5 - Casca Dura Ikeda) were evaluated at five levels of irrigation water salinity (0.6 (control); 1.2; 1.8, 2.4 and 3.0 dS m-1), arranged in 5 × 5 factorial scheme, in a completely randomized design, with four replicates. Bell pepper cultivars were grown on trays for 20 days after sowing, period in which they were evaluated for emergence, growth, phytomass accumulation and tolerance index. The increase in irrigation water salinity reduced bell pepper emergence, growth and dry matter accumulation, and the cultivars C2 - All Big and C4 - Rubi Gigante were the most tolerant to salinity in the initial growth stage. Tolerance to salinity occurred in the following order: C2 - All Big > C4 - Rubi Gigante > C1 - Dulce All Big = C5 - Casca Dura Ikeda > C3 - Italiano Amarelo Gigante.

scholarly journals Potasssium chloride as a nutrient seed primer to enhance salt‑tolerance in maize

2012 ◽  
Vol 47 (8) ◽  
pp. 1181-1184 ◽  
Author(s):  
Badar‑uz‑Zaman ◽  
Arshad Ali ◽  
Syed Ishtiaq Hyder ◽  
Muhammad Arshadullah ◽  
Saqib Umar Bhatti
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Dry Matter ◽  
Germination Rate ◽  
Seed Priming ◽  
Germination Percentage ◽  
Stress Conditions ◽  
Maize Crop ◽  
Mean Germination Time ◽  
Muriate Of Potash

The objective of this work was to determine if KCl could be a useful nutrient primer for safe seed germination in maize crop under salt stress conditions. Seed priming was done using 50 mmol L‑1 of muriate of potash, and germination and seedling growth were evaluated after salt stress with NaCl up to 50 mmol L‑1. Another set of seeds was tested under the same salt stress conditions without priming. Under salinity stress, germination percentage, germination rate index, germination coefficient, and seedling vigor indexes were higher in primed seeds. In unprimed seeds, mean germination time increased, while the germination rate index and the fresh and dry matter mass decreased more sharply with salinity stress. The Na/K ratio was higher in unprimed seeds.

scholarly journals Mitigation of Salinity Stress Effects on Broad Bean Productivity Using Calcium Phosphate Nanoparticles Application

Horticulturae ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 75
Author(s):  
Amira K. Nasrallah ◽  
Ahmed A. Kheder ◽  
Maimona A. Kord ◽  
Ahmed S. Fouad ◽  
Mohamed M. El-Mogy ◽  
...  
Keyword(s):  
Salt Stress ◽  
Calcium Phosphate ◽  
Salinity Stress ◽  
Agricultural Sector ◽  
Broad Bean ◽  
Growth Parameters ◽  
Saline Water ◽  
Soluble Sugars ◽  
Higher Plant ◽  
Plant Yield

Water salinity is one of the major abiotic stresses, and the use of saline water for the agricultural sector will incur greater demand in the coming decades. Recently, nanoparticles (NPs) have been used for developing numerous plant fertilizers as a smart and powerful form of material with dual action that can alleviate the adverse effects of salinity and provide the plant with more efficient nutrient forms. This study evaluated the influence of calcium phosphate NPs (CaP-NPs) as a soil fertilizer application on the production and bioactive compounds of broad bean plants under salinity stress. Results showed that salinity had deleterious effects on plant yield with 55.9% reduction compared to control. On the other hand, CaP-NPs dramatically improved plant yield by 30% compared to conventional fertilizer under salinity stress. This improvement could be attributed to significantly higher enhancement in total soluble sugars, antioxidant enzymes, proline content, and total phenolics recorded use of nano-fertilizer compared to conventional use under salt stress. Additionally, nano-fertilizer reflected better mitigatory effects on plant growth parameters, photosynthetic pigments, and oxidative stress indicators (MDA and H2O2). Therefore, our results support the replacement of traditional fertilizers comprising Ca2+ or P with CaP-nano-fertilizers for higher plant productivity and sustainability under salt stress.

scholarly journals IRRIGAÇÃO COM ÁGUA SALINA NA CULTURA DO GIRASSOL (Helianthus Annuus L.) EM SOLO COM BIOFERTILIZANTE BOVINO

Irriga ◽  
2015 ◽  
Vol 20 (4) ◽  
pp. 680-693 ◽  
Author(s):  
Krishna Ribeiro Gomes ◽  
Geocleber Gomes de Sousa ◽  
Francisco Aldiel Lima ◽  
Thales Vinicius de Araújo Viana ◽  
Benito Moreira de Azevedo ◽  
...  
Keyword(s):  
Salt Stress ◽  
Helianthus Annuus ◽  
Leaf Area ◽  
Dry Matter ◽  
Stem Diameter ◽  
Initial Growth ◽  
Helianthus Annuus L ◽  
La Mancha ◽  
Number Of Leaves ◽  
E Mail

IRRIGAÇÃO COM ÁGUA SALINA NA CULTURA DO GIRASSOL (Helianthus Annuus L.) EM SOLO COM BIOFERTILIZANTE BOVINO  KRISHNA RIBEIRO GOMES1; GEOCLEBER GOMES DE SOUSA2; FRANCISCO ALDIEL LIMA3; THALES VINICIUS DE ARAÚJO VIANA4; BENITO MOREIRA DE AZEVEDO4 E GIOVANA LOPES DA SILVA6 1 Engenheira Agrônoma, Doutoranda, Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Universidad de Castilla-La Mancha, Ctra. de las Peñas, km 3,2, [email protected] Engenheiro Agrônomo, Doutor em Engenharia Agrícola, Professor Adjunto I, Instituto de Desenvolvimento Rural, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Redenção, CE, e-mail:[email protected] Engenheiro Agrônomo, Doutorando, Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Universidad de Castilla-La Mancha, e-mail: [email protected] Engenheiro Agrônomo, Prof. Titular, Departamento de Engenharia Agrícola, Centro de Ciências Agrárias, Universidade Federal do Ceará, e-mail: [email protected]; [email protected] Engenheira Agrônoma, Profa. do curso de Engenharia Ambiental e Sanitária, FANOR, Campus das Dunas, Fortaleza, CE, e-mial: [email protected]  1 RESUMO Este trabalho foi realizado com o objetivo de avaliar o crescimento inicial e as trocas gasosas da cultura do girassol (Helianthus annuus L.) irrigada com diferentes níveis de salinidade em solo com e sem biofertilizante bovino. O experimento foi conduzido na área experimental da Estação Agrometeorológica, UFC, Fortaleza-CE, no período de setembro a novembro de 2012. Os tratamentos foram distribuídos em delineamento inteiramente aleatorizado, em esquema fatorial 5 x 2, com cinco repetições, referente aos valores de cinco condutividades elétricas da água de irrigação: 0,8; 1,5; 3,0; 4,5 e 6,0 dS m-1, em solo sem e com biofertilizante bovino, aplicado de uma única vez, ao nível de 10% do volume do substrato, três dias antes da semeadura. Foram avaliadas as seguintes variáveis: número de folhas, altura de plantas, diâmetro do caule, área foliar, fotossíntese, condutância estomática, temperatura da folha, concentração interna de CO2, transpiração das plantas, matéria seca da parte aérea, da raiz e total. O estresse salino afetou o diâmetro do caule, a área foliar e o número de folhas de plantas do girassol, sendo em menor intensidade no solo com o biofertilizante bovino. O biofertilizante bovino diminuiu os efeitos negativos das concentrações crescentes de sais na água de irrigação na matéria seca da parte aérea, matéria seca da raiz e matéria seca total de plantas de girassol.  Palavras-chave: estresse salino, índices fisiológicos, insumo orgânico  GOMES, K. R., SOUSA, G. G., LIMA, F. A., VIANA, T. V. A., AZEVEDO, B. M., SILVA, G. L.SALINE IRRIGATION OF  SUNFLOWER  (Helianthus Annuus L.) IN SOIL WITH BOVINE BIOFERTILIZER   2 ABSTRACT This study aimed to evaluate  initial growth and gas exchanges of sunflower plants (Helianthus annuus L.) irrigated with different salt concentrations in soil treated with and without bovine biofertilizer.  The experiment was conducted at the experimental area in the  Agrometeorological station, UFC, Fortaleza-CE, from September to November 2012. Treatments were arranged   in a completely  randomized 5 x 2 factorial design, with five replicates referring to  five electrical conductivity values of  irrigated water.:  0.8;1.5;3.0;4.5 and 6.0 dS m-1, in soil with and without bovine biofertilizer. The latter was applied only once, at 10% substrate volume, three days before sowing.  The following parameters were evaluated: number of leaves, plant height, stem diameter , leaf area, photosynthesis, stomatal conductance, leaf temperature, internal CO2 concentration, plant transpiration, shoot,  root and total dry matter. Salt stress affected stem diameter, leaf area and number of leaves of sunflower plants, and in a  lesser degree,  in the  soil with bovine biofertilizer. Bovine biofertilizer also reduced the negative effects of increasing salt concentrations in the irrigation water observed in shoot, root and total dry matter of sunflower plants.   Keywords: salt stress, physiological indices, organic fertilizer. 

scholarly journals Selectivity of Herbicides to Native Tree Species in Brazil

2019 ◽  
Vol 37 ◽  
Author(s):  
L. OLIVEIRA ◽  
A.C. SILVA JR ◽  
C.G. GONÇALVES ◽  
M.R.R. PEREIRA ◽  
D. MARTINS
Keyword(s):  
Tree Species ◽  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Initial Development ◽  
Randomized Design ◽  
Chlorimuron Ethyl ◽  
Native Tree Species ◽  
Trema Micrantha ◽  
And Control

ABSTRACT: Weeds are one of the main obstacles in the recovery of degraded areas. This research aimed to study the selectivity of herbicides on Trema micrantha (Jamaican nettletree), Schinus molle (Peruvian peppertree), and Apuleia leiocarpa (garapeira) seedlings. An experiment was installed in Junqueirópolis and another in Jaboticabal/SP, Brazil. The experimental design used was completely randomized design with four replications. Treatments consisted of clethodim + fenoxaprop-p-ethyl (50 + 50 g a.i. ha-1), sethoxydim (184 g a.i. ha-1), quizalofop-p-ethyl (75 g a.i. ha-1), nicosulfuron (50 g a.i. ha-1), fluazifop-p-butyl (125 g a.i. ha-1), fomesafen (225 g a.i. ha-1), haloxyfop-methyl (48 g a.i. ha-1), bentazon (720 g a.i. ha-1), chlorimuron-ethyl (15 g a.i. ha-1), and control without herbicide. The analyzed characteristics were stem diameter, plant height, and phytointoxication at 7, 14, 21, 28, 35, and 42 days after herbicide application (DAA), in addition to shootdry matter accumulation in seedlings at the end of the study. Nicosulfuron and chlorimuron-ethyl caused intoxication in all the studied tree species. In Jaboticabal, these herbicides impaired the initial growth of Jamaican nettletree seedlings, while no herbicide delayed its initial development in Junqueirópolis.A similar result was obtained regarding dry matter accumulation for garapeira in both cities. The herbicides clethodim + fenoxaprop-p-ethyl and sethoxydim decreased dry matter accumulation in Peruvian peppertree plants in Jaboticabal and Junqueirópolis, respectively, thus not being recommendedtheir use for these species.

scholarly journals Tolerance of castor bean cultivars under salt stress

2016 ◽  
Vol 20 (6) ◽  
pp. 557-563 ◽  
Author(s):  
Francisco V. da S. Sá ◽  
Emanoela P. de Paiva ◽  
Evandro F. de Mesquita ◽  
Antonio M. P. Bertino ◽  
Marcelo A. Barbosa ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Castor Bean ◽  
Dry Matter ◽  
Growth Stage ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Initial Growth Stage ◽  
Salinity Levels

ABSTRACT This study aimed to evaluate the tolerance of castor bean cultivars under salt stress during the initial growth stage. The experiment was set in randomized blocks, in a 5 x 4 factorial scheme, resulting in 20 treatments, 5 salinity levels (0.6-control, 1.2, 1.8, 2.4 and 3.0 dS m-1) and 4 castor bean cultivars (BRS Energy, LA Guarani, BRS Gabriela and IAC 028)] with 3 replicates. At 30 days after sowing, plants were evaluated for growth, dry matter accumulation and salt tolerance. Increased salinity levels in the water used for irrigation reduced the growth of all the studied cultivars. The salt tolerance of the studied castor bean cultivars follows the following order: BRS Energia > BRS Gabriela = IAC 028 > LA Guarani.

scholarly journals Germination and initial growth of guava plants irrigated with saline water

2005 ◽  
Vol 9 (4) ◽  
pp. 515-519 ◽  
Author(s):  
Lourival F. Cavalcante ◽  
Ítalo H. L. Cavalcante ◽  
Kátia S. N. Pereira ◽  
Francisco A. de Oliveira ◽  
Saulo C. Gondim ◽  
...  
Keyword(s):  
Dry Matter ◽  
Saline Water ◽  
Psidium Guajava ◽  
Dry Matter Production ◽  
Initial Growth ◽  
Matter Production ◽  
Germination Process ◽  
Process Plant ◽  
Water Effects ◽  
Agronomic Quality

The present study was carried in order to evaluate the effect of saline water irrigation with electrical conductivity (ECw) of 0.5; 1.5; 3.0; 4.5 and 6.0 dS m-1, on germination and some growth variables during the seedling formation process of four guava cultivars (Psidium guajava L.): Pentecoste, Paluma, Surubim and IPA B-38. Water salinity inhibited the germination process, plant height, stem diameter, leaf area and dry matter production of roots, stems and leaves, independently of cultivar. After germination, the seedlings did not survive due to saline water effects of ECw 4.5 and 6.0 dS m-1. After 180 days of sowing, the seedlings irrigated with ECw more than 1.5 dS m-1 did not present agronomic quality for planting. Dry matter production sequence of different parts of plants was as follows: leaves > roots > stems, without significant differences among cultivars especially when irrigated with saline water of ECw > 3.0 dS m-1.

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