Gas exchanges and production of colored cotton irrigated with saline water at different phenological stages

Soares, Lauriane Almeida dos Anjos; Fernandes, Pedro Dantas; Lima, Geovani Soares de; Suassuna, Janivan Fernandes; Pereira, Rennan Fernandes

doi:10.5935/1806-6690.20180027

Cited by 12 publications

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“…In order to evaluate the gas exchange of yellow passion fruit irrigated with waters of low (0.5 dS m -1 ) and high (4.5 dS m -1 ) salinity, Freire et al (2014) observed that the use of high-salinity water in irrigation led to an increase of 13.2% in Ci, with values of 229.4 μmol mol -1 in plants under ECw of 0.5 dS m -1 and 259.7 μmol mol -1 in those that received the highest salinity level (4.5 dS m -1 ). In a study evaluating the gas exchange of genotypes of cotton (Gossypium hirsutum) under salt stress, during the stages of plant development, under conditions of low and high salinity, Soares et al (2018) also found that there was an increase in the Ci of plants with the application of saline water in the different stages of development.…”

Section: Resultsmentioning

confidence: 99%

“…Considering that, tolerance and sensitivity to salt stress vary according to plant species, cultivar, cationic and/or anionic nature, intensity and duration of stress, crop and irrigation management, edaphoclimatic conditions and plant development stages (SOARES et al, 2018). Thus, the use of high salinity water sources depends on strategies that ensure the sustainability of crops in the long term, particularly including the use of water sources with high salt concentration in stages of higher tolerance by the crop, mixture of waters of different qualities and cyclic conditions (LIMA et al, 2020b).…”

Section: Introductionmentioning

confidence: 99%

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Potassium Does Not Attenuate Salt Stress in Yellow Passion Fruit Under Irrigation Management Strategies

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The objective of this study was to evaluate the gas exchange, growth and production of yellow passion fruit cv. BRS GA1, as a function of irrigation management strategies with saline water and potassium doses. The experiment was conducted under field conditions in São Domingos, PB, Brazil. A randomized block design was used in a 6 * 2 factorial scheme. The treatments consisted of six strategies of irrigation with saline waters (irrigation with low-salinity water throughout the crop cycle - SE; irrigation with high-salinity water in the vegetative stage - VE; flowering stage - FL; fruiting stage - FR; in the successive vegetative/flowering stages - VE/FL; vegetative/fruiting stages - VE/FR) and two doses of potassium (100 and 130% of the K2O recommendation), with four replicates and four plants per plot. The 100% dose corresponded to 60 g of K 2O plant-1 year-1. The effects of using high-salinity water (3.2 dS m-1) alternated with low-salinity water (1.3 dS m-1) were evaluated in different stages of the cultivation cycle. Irrigation with saline water in the fruiting stage promoted an increase in intercellular CO2 concentration and decrease in CO2 assimilation, with effects of non-stomatal origin standing out as limiting factors of photosynthetic efficiency. The highest CO 2 assimilation rate in plants subjected to water salinity of 1.3 dS m-1 throughout the cycle resulted in increments in the number of fruits and in the production per plant of the passion fruit cv. BRS GA1.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potassium Does Not Attenuate Salt Stress in Yellow Passion Fruit Under Irrigation Management Strategies

et al. 2020

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“…No entanto, esse incremento observado nas maiores concentrações salinas é equivalente ao encontrado em plantas C3, sugerindo que não houve limitação na disponibilidade de CO2 para o processo fotossintético (TAIZ et al, 2017). Resultados semelhantes são descritos por Soares et al (2018) em plantas de algodão irrigadas com águas salinas (Gossypium hirsutum L.).…”

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Respostas Fisiológicas De Mulungu Submetida a Estresse Salino E Aplicação De Ácido Salicílico

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RESPOSTAS FISIOLÓGICAS DE MULUNGU SUBMETIDA A ESTRESSE SALINO E APLICAÇÃO DE ÁCIDO SALICÍLICO FRANCISCO ROMÁRIO ANDRADE FIGUEIREDO1; MARIA DE FÁTIMA QUEIROZ LOPES2; RONIMEIRE TORRES DA SILVA2; JACKSON SILVA NÓBREGA2; TOSHIK IARLEY DA SILVA3 E RISELANE DE LUCENA ALCÂNTARA BRUNO2 1 Departamento de Ciências Vegetais, Universidade Federal Rural do Semi-Árido - UFERSA, Rua Francisco Mota, 572, Presidente Costa e Silva, 59625-900, Mossoró - RN, Brasil. E-mail: romarioagroecologia@yahoo.com.br 2 Departamento de Fitotecnia e Ciências Ambientais, Universidade Federal da Paraíba - UFPB, Rodovia PB-079, 58397-000, Areia-PB, Brasil. E-mails: fatimaqueiroz0@gmail.com; ronimeiretorres@hotmail.com; jacksonnobrega@hotmail.com; lanebruno.bruno@gmail.com 3 Departamento de Fitotecnia, Universidade Federal de Viçosa - UFV, Avenida Peter Henry Rolfs, s/n - Campus Universitário, 36570-900, Viçosa – MG, Brasil. E-mail: iarley.toshik@gmail.com 1 RESUMO O mulungu (Erythrina velutina Willd.) é uma espécie florestal nativa da região Nordeste do Brasil, sendo utilizada para fins econômicos e medicinal. No entanto, o seu desempenho fisiológico pode ser comprometido por diversos fatores bióticos e abióticos, dentre estes, o estresse salino. Nesse sentido, a aplicação do ácido salicílico, fitohormônio de origem fenólica, torna-se uma estratégia promissora na busca de minimizar esses efeitos deletérios. Assim, o objetivou-se conhecer as respostas fisiológicas do mulungu irrigado com água salina associado a aplicação de ácido salicílico. O delineamento utilizado foi em blocos casualizados, em esquema fatorial incompleto 5x5, gerados a partir da matriz Composto Central de Box com cinco níveis de condutividade elétrica da água de irrigação (0,5; 1,74; 4,75; 7,76 e 9,0 dS m-1) e cinco doses de ácido salicílico (0,0; 0,29; 1,0; 1,71 e 2,0 mM L-1), com quatro repetições. Foram avaliadas as trocas gasosas, fluorescência e índice de clorofila aos 60 dias após a irrigação com água salina. Os dados foram submetidos à análise de variância pelo teste F, nos casos de significância foi realizada análise de regressão polinomial. A salinidade da água de irrigação ocasiona efeitos deletérios nas trocas gasosas de Erythrina velutina Willd. Os índices de clorofila foram afetados positivamente pelos níveis salinos aplicados e a fluorescência inicial das plantas foi atenuada pela aplicação de ácido salicílico. Palavras-chave: Erythrina velutina Willd, caatinga, salinidade, trocas gasosas FIGUEIREDO, F. R. A.; LOPES, M. F. Q.; SILVA, R. T.; NÓBREGA, J. S.; SILVA, T. I.; AND BRUNO, R. A. L. PHYSIOLOGICAL RESPONSES OF MULUNGU SUBMITTED TO SALT STRESS AND APPLICATION OF SALICYLIC ACID 2 ABSTRACT Mulungu (Erythrina velutina Willd.) is a forest species native to the Northeast region of Brazil, being used for economic and medicinal purposes. However, its physiological performance can be compromised by several biotic and abiotic factors, among them, saline stress. That way, the application of salicylic acid, phytohormone of phenolic origin, becomes a promising strategy in the search to minimize these deleterious effects. Thus, the objective was to learn the physiological responses of mulungu irrigated with saline water associated with the application of salicylic acid. The design was a randomized complete block, in an incomplete factorial scheme, using the Box Central Composite (CCB) matrix with five levels of electrical conductivity of irrigation water (0.5; 1.74; 4.75; 7.76 and 9.0 dS m-1), and five salicylic acid doses (0.0, 0.29, 1.0, 1.71 and 2.0 mM), with four replicates. Gas exchange, fluorescence and chlorophyll indices were evaluated 60 days after irrigation with saline water. Data were submitted to analysis of variance by the F test, in cases of significance polynomial regression analysis was performed. The salinity of irrigation water causes deleterious effects on the gas exchange of Erythrina velutina Willd. The chlorophyll indices were positively affected by saline levels applied and the initial fluorescence of the plants was attenuated by the application of salicylic acid. Keywords: Erythrina velutina Willd, caatinga, salinity, gas exchange

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“…Such result is probably a consequence of greater CO 2 assimilation compared with the CO 2 found in the substomatal chamber because, if Ci increases due to the rate of stomatal opening, the entry of CO 2 in the leaf mesophyll may have decreased because of the reduction in gs, but CO 2 consumption in the chloroplast may have been reduced as well (Ouyang et al, 2017). According to Soares et al (2018), osmotic stress, associated with accumulation of salts in the soil, reduces water availability to plants and, therefore, can affect their gas exchanges and growth.…”

Section: Effect Of Salt Stress and Nitrogen And Potassium Fertilizatimentioning

confidence: 99%

NK combinations do not alleviate the effects of salt stress on gas exchange, photosynthetic pigments and growth of cotton (Gossypium hirsutum L.)

et al. 2019

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The water resources in the semi-arid region of Northeast Brazil commonly have high concentrations of salts, compromising the quality of the water used in irrigation. Thus, it is necessary to study the feasibility of using these resources in agriculture. The present study aimed to evaluate gas exchanges, photosynthetic pigments and growth of white cotton cv. BRS 368 RF using irrigation water of different salinity levels and fertilization with combinations of nitrogen and potassium, under greenhouse conditions in the municipality of Campina Grande-PB, Brazil. Treatments were arranged in randomized blocks in a 5 x 4 factorial scheme, with five levels of electrical conductivity of water–ECw (0.7, 2.2, 3.7, 5.2 and 6.7 dS m-1) and four combinations of fertilization with nitrogen and potassium (70/50, 100/75, 130/100, 160/125% of the recommended dose), with three replicates. There was degradation in chlorophyll a and b levels and in cotton growth, but the cultivar BRS 368 RF markedly increased carotenoid biosynthesis at 75 days after sowing. Nitrogen and potassium application in the combination of 100/75% of their respective recommendations led to increase in plant height. The supply of nitrogen in combination with potassium did not alleviate the deleterious effects of salt stress on gas exchange, photosynthetic pigments and growth of cotton.

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Gas exchanges and production of colored cotton irrigated with saline water at different phenological stages

Cited by 12 publications

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Potassium Does Not Attenuate Salt Stress in Yellow Passion Fruit Under Irrigation Management Strategies

Potassium Does Not Attenuate Salt Stress in Yellow Passion Fruit Under Irrigation Management Strategies

Respostas Fisiológicas De Mulungu Submetida a Estresse Salino E Aplicação De Ácido Salicílico

NK combinations do not alleviate the effects of salt stress on gas exchange, photosynthetic pigments and growth of cotton (Gossypium hirsutum L.)

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