Impact of Saline Conditions and Nitrogen Fertilization on Citrus Production and Gas Exchanges

Sousa, Jônatas Raulino Marques de; Gheyi, Hans Raj; Brito, Marcos Eric Barbosa; Xavier, Diego Azevedo; Furtado, Guilherme de Freitas

doi:10.1590/1983-21252016v29n218rc

Cited by 28 publications

(29 citation statements)

References 26 publications

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“…Hussain et al (2012) subjected citrus to salt stress and reported that a reduction in gs leads to a reduction in CO 2 diffusion. The same trend observed in the present study was also found by Sousa et al (2016), in citrus plants grown with waters of different salinity levels (0.6, 1.2, 1.8, 2.4 and 3.0 dS m -1 ). According to these authors, there is a relationship between transpiration and stomatal conductance, so that a reduction in gs leads to a reduction in E. Gonçalves et al (2010) also observed the existence of this relationship and concluded that the water vapor flow to the atmosphere decreases as the stomata close.…”

Section: Resultssupporting

confidence: 92%

“…Reduction of gs in the West Indian cherry is one of the first responses to salt stress. This occurs as a defense mechanism to reduce water loss through the leaves to the atmosphere because water absorption by roots becomes more difficult in saline soil (SOUSA et al, 2016). 1 2 Means followed by the same letter do not differ by Tukey test (p<0.05).…”

Section: Resultsmentioning

confidence: 99%

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Gas Exchanges, Quantum Yield and Photosynthetic Pigments of West Indian Cherry Under Salt Stress and Potassium Fertilization

et al. 2019

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Water resources in the semi-arid region of Northeast Brazil commonly contain high salt concentrations, compromising the quality of water for agriculture. Thus, adopting techniques that make the use of these resources feasible in agriculture is fundamental. The present study aimed to evaluate the gas exchanges, quantum yield and photosynthetic pigments of grafted West Indian cherry subjected to salt stress and potassium fertilization under greenhouse conditions in the municipality of Campina Grande, PB, Brazil. Treatments were distributed in randomized blocks, composed of two levels of electrical conductivity -ECw (0.8 and 3.8 dS m -1 ) of water and four doses of potassium (50, 75, 100 and 125% of the dose recommended for the crop), with three replicates. The dose relative to 100% corresponded to 19.8 g of K 2 O per plant. Gas exchanges, chlorophyll a fluorescence and photosynthetic pigments of West Indian cherry are negatively affected by irrigation using water with electrical conductivity of 3.8 dS m -1 , which compromises the photosynthetic apparatus of the plant, a situation evidenced by the reduction in photosystem II quantum efficiency. Increasing potassium doses led to increments in transpiration, chlorophyll a maximum fluorescence and chlorophyll b content in West Indian cherry grown under salt stress, but do not attenuate the negative effects of irrigation with 3.8 dS m -1 water on its potential photochemical efficiency.Keywords: Malpighia emarginata. Physiology. Potassium. Salinity. TROCAS GASOSAS, RENDIMENTO QUÂNTICO E PIGMENTOS FOTOSSINTÉTICOS DA ACEROLEIRA SOB ESTRESSE SALINO E ADUBAÇÃO POTÁSSICARESUMO -Os recursos hídricos da região semiárida do Nordeste Brasileiro comumente possuem elevadas concentrações de sais, comprometendo a qualidade da água para agricultura. Desta forma, a adoção de práticas de manejo que viabilizem o uso de tais recursos na agricultura é fundamental. Neste trabalho, objetivou-se avaliar as trocas gasosas, o rendimento quântico e os pigmentos fotossintéticos da acerola enxertada submetida ao estresse salino e adubação potássica em condição de casa de vegetação no município de Campina Grande-PB. Os tratamentos foram distribuídos em blocos casualizados, sendo constituídos de dois níveis de condutividade elétrica da água -CEa (0,8 e 3,8 dS m -1 ) e quatro doses de potássio (50, 75; 100 e 125% da dose recomendada para a cultura), com três repetições. A dose de 100% correspondeu a 19,8 g de K 2 O por planta. As trocas gasosas a fluorescência da clorofila a e os pigmentos fotossintéticos da aceroleira são afetados negativamente pela irrigação com água de condutividade elétrica de 3,8 dS m -1 que compromete o aparato fotossintético da planta, situação observada através da redução da eficiência quântica do fotossistema II. As doses de potássio crescentes promovem incremento na taxa de transpiração, fluorescência máxima da clorofila a e no teor de clorofila b da aceroleira cultivada sob estresse salino, porém não atenuam os efeitos negativos da irrigação com água de 3,8 dS m -1 sobre a...

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Gas Exchanges, Quantum Yield and Photosynthetic Pigments of West Indian Cherry Under Salt Stress and Potassium Fertilization

et al. 2019

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“…When correlating these values, we verified that the transpiration rate of the plants in the second harvest was 59.2% smaller than the transpiration rate of the first harvest (Figure 2A). The lowest values of stomatal conductance in the second crop ( Figure 1B) indicate that the plants closed part of the stomata due to stress, resulting in a lower transpiration rate (Neves et al, 2009;Sousa et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Intercambio de gas y productividad de maracuyá amarillo irrigado bajo salinidad y fertilizado con potasio y biofertilizante

Nunes

Cavalcante

Pereira

et al. 2017

Ciencia e investigación agraria

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. 2017. Gas exchange and productivity of yellow passion fruit irrigated with saline water and fertilized with potassium and biofertilizer. Cien. Inv. Agr. 44(2): 168-183. The salinity of irrigation water can affect the growth and development of most plants of commercial interest. Aiming to study these aspects in passion fruit culture, an experiment was performed to evaluate the effects of bovine biofertilizer and potassium fertilization on gas exchange and production of the passion fruit 'BRS Giant Yellow' irrigated with non-saline and saline water. The treatments were arranged in randomized blocks with sub-subdivided plots using the 2×(3×5) scheme, which refers to two levels of electrical conductivity of the irrigation water as the main plot (0.35 and 4.00 dS m -1 ) and the combination of three potassic fertilization practices (without fertilization, fertilized with conventional and slow release KCl) with five doses of bovine biofertilizer (0, 25, 50, 75 and 100% of dose of 15 L m -2 ) in the subplots, with three replicates and 12 plants per plot. The physiological variables and the productivity were evaluated in two harvests, and the data were submitted to statistical evaluation of samples repeated in time. The application of bovine biofertilizer and potassium in soil with a sandy texture irrigated with saline water did not inhibit the degenerative effect of the salts on the photosynthetic rates of the plants. The salinity of the irrigation water reduced stomatal conductance, transpiration and net photosynthesis of the plants, but in the second crop, the instantaneous water use efficiency was higher. Although the productivity decreased from the first to the second harvest, the biofertilizer associated with potassic fertilization increased the yield of the crop, which surpassed the average of Brazil, the Brazilian Northeast and the State of Paraiba, Brazil.

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“…Sousa et al (2016) observed the inhibition of gas exchanges in irrigated citrus with saline water and Cerqueira et al (2015) observed that the gas exchange in Vitts was negatively affected by water stress. However, the quantification of gas exchange in relation to stress by compaction is variable that still not mentioned in the literature for banana culture that supports the present work.…”

Section: (A) (B)mentioning

confidence: 99%

Simulating stress condition through compaction in banana plant cultivated In vitro

Almeida¹,

Santos²,

Martins³

et al. 2018

Biosci. J.

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ABSTRACT:Banana cultivation is an agricultural activity practiced in different regions and constantly subjected to abiotic stresses that limit its productivity. To treat the effect of these stresses research can be undertake by simulating them in vitro since it limit the effect of the external factor in the experiment. Therefore, the objective of this study was to simulate the compaction in banana plant cultivated in vitro using Phytagel. To realize the experiment, we used MS culture medium with two distinct consistency added in the testing tubes. In the bottom part was added 10 mL of culture medium with consistency of jellification: 1.8, 2.8, 3.8, 4.8 and 5.8 g L -1 of Phytagel. Over this culture medium was added 5mL of half MS with consistency standard 1.8 g L -1 of Phytagel. Posteriorly, the planting materials from cultivar Grand Naine, BRS Vitória and BRS Princesa were inoculated in the growth medium. After 30 days of culture the plant materials were submitted for agronomic and physiological evaluation. The result showed non-significant difference among the compaction factors on physiological parameters however variety Grand Naine presents better performance in this character. Besides variety Grand Naine increased the rate of photosynthesis under compaction. This behaviour probably occurred due to overcoming the effect of stress by the variety. Therefore, it can be concluded that the cultivar Grand Naine is superior to cultivars BRS Vitória and BRS Princesa since it produces superior performance on rate of photosynthesis, stomatal conductance, and transpiration under simulated compaction conditions that favor the accumulation of plant biomass.

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Impact of Saline Conditions and Nitrogen Fertilization on Citrus Production and Gas Exchanges

Cited by 28 publications

References 26 publications

Gas Exchanges, Quantum Yield and Photosynthetic Pigments of West Indian Cherry Under Salt Stress and Potassium Fertilization

Gas Exchanges, Quantum Yield and Photosynthetic Pigments of West Indian Cherry Under Salt Stress and Potassium Fertilization

Intercambio de gas y productividad de maracuyá amarillo irrigado bajo salinidad y fertilizado con potasio y biofertilizante

Simulating stress condition through compaction in banana plant cultivated In vitro

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