Gas exchanges and growth of cotton cultivars under water salinity

Silva, André Alisson Rodrigues da; Veloso, Luana Lucas de Sá Almeida; Nascimento, Ronaldo do; Nascimento, Elka Costa Santos; Bezerra, Carlos Vailan de Castro; Pereira, Márcia Cristina de Araújo

doi:10.1590/1807-1929/agriambi.v23n6p393-399

Cited by 5 publications

(5 citation statements)

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“…A 26.1% reduction in A (9.54 mmol CO 2 m -2 s -1 ) was observed between the highest (6.3 dS m -1 ) and the lowest (0.3 dS m -1 ) salinity levels. These A results corroborate those found by Silva et al (2019b) in a study with cotton cultivars BRS 368 RF and BRS Safira under salt stress (ECw ranging from 1.5 to 7.5 dS m -1 ), where a 5.1% decrease was observed per unit increase in ECw. The authors attributed this result to the decline in stomatal conductance and transpiration, a process that can restrict the transfer of CO 2 to the leaf and contribute to the reduction of A.…”

Section: Resultssupporting

confidence: 91%

Fisiologia e componentes de produção do algodoeiro sob estresse salino e aplicação de ácido salicílico

et al. 2023

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O uso de águas salinas na agricultura irrigada vem se tornando uma realidade em diversas regiões do mundo, entretanto, dependendo do nível de tolerância da cultura ocorrem limitações no crescimento e desenvolvimento. Dessa forma, o uso das estratégias que minimizem o estresse salino nas culturas é fundamental, nesta perspectiva, o ácido salicílico pode atuar como antioxidante e contribuir na tolerância das plantas ao estresse salino. Neste sentido, objetivou-se avaliar os efeitos da aplicação foliar de ácido salicílico na fisiologia e nos componentes de produção do algodoeiro naturalmente colorido cv. BRS Jade cultivado sob estresse salino. As plantas foram conduzidas em lisímetros sob condições de céu aberto, no Centro de Ciências e Tecnologia Agroalimentar pertencente à Universidade Federal de Campina Grande, Pombal-PB. O delineamento utilizado foi em blocos casualizados, em esquema fatorial 5 × 5, sendo cinco níveis de condutividade elétrica da água de irrigação - CEa (0,3; 1,8; 3,3; 4,8 e 6,3 dS m-1) e cinco concentrações de ácido salicílico - AS (0; 1,5; 3,0, 4,5 e 6,0 mM) com três repetições. A irrigação com água a partir de 0,3 dS m-1 reduziu as trocas gasosas, a síntese de pigmentos fotossintéticos e o número de capulhos do algodoeiro cv. BRS Jade. A irrigação com água a partir de 0,3 dS m-1 induziu o fechamento estomático e diminuiu a transpiração, a taxa de assimilação de CO2, os teores de pigmentos fotossintéticos e os componentes de produção do algodoeiro cv. BRS Jade. As concentrações de ácido salicílico de 2,6 e 2,7 mM proporcionaram aumento na taxa de assimilação de CO2 e condutância estomática, respectivamente, das plantas de algodão. A aplicação foliar de ácido salicílico não amenizou os efeitos do estresse salino sobre as trocas gasosas, a síntese de pigmentos fotossintéticos e os componentes de produção do algodoeiro.

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Section: Resultssupporting

confidence: 91%

Fisiologia e componentes de produção do algodoeiro sob estresse salino e aplicação de ácido salicílico

et al. 2023

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“…The results of this research revealed that the increase in the electrical conductivity of the irrigation water compromised the instantaneous efficiency of the carboxylation. These results corroborated those reported by SILVA et al (2019), who found that salinity compromises carbon utilization in cotton crop (Gossypium hirsutum l.).…”

Section: Discussionsupporting

confidence: 92%

Potassium fertilization as salt stress attenuator in sour passion fruit

et al. 2023

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Water scarcity associated with irregular rainfall in the semi-arid region of Northeastern Brazil stands out as a limiting factor for agricultural production. Thus, the use of waters with high concentration of salts is an alternative to expand irrigated agriculture in this region. In this context, this study evaluated the water status, intercellular electrolyte leakage, photosynthetic pigments, and gas exchange of ‘BRS SC1’ sour passion fruit as a function of irrigation with water of different levels of salinity and potassium doses. The experiment was carried out in pots adapted as drainage lysimeters under field conditions at the Experimental Farm of the Federal University of Campina Grande in São Domingos - PB, Brazil. The experimental design was randomized blocks, in a 5 × 4 factorial scheme, whose treatments were obtained by combining two factors: five levels of electrical conductivity of irrigation water - ECw (0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1), associated with four potassium doses (60, 80, 100, and 120% of the recommendation), with three replicates. Water with electrical conductivity greater than 0.3 dS m-1 reduced the relative water content, chlorophyll a and chlorophyll b contents, CO2 assimilation rate, and instantaneous water use efficiency of ‘BRS SC1’ sour passion fruit plants. The estimated potassium dose of 85% of the recommendation (equivalent to 293 g per plant per year) mitigated the deleterious effects of salt stress on stomatal conductance, transpiration, internal CO2 concentration, and instantaneous carboxylation efficiency of passion fruit ‘BRS SC1’.

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“…There was a reduction in the number of leaves with the increase in salt concentration, and a decreasing linear model was fitted for all cultivars (Figure 1); for each unit increase in ECw, there were reductions of 7.2, 5.98, 12.65 and 8.33% for the cultivars Branquinha, Manteiguinha, Espírito This result reveals superiority of the cultivar Manteiguinha, that is, evidencing greater tolerance to the decrease in cell elongation rate and low water absorption caused by excess soluble salts (SILVA et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…ns = not significant Table 3 -Summary of the joint analysis of variance (F values) for plant height (PH), leaf area (LA), number of leaves (NL) and stem diameter (SD) of four lima bean cultivars as a function of different levels of salinity Pereira Filho et al (2017a), evaluated the effect of salinity on cowpea crop and also verified a reduction in plant height with the increase in the electrical conductivity of irrigation water. Silva et al (2019), studied cotton crop irrigated with saline water and observed that salt stress inhibited plant height.…”

Section: Resultsmentioning

confidence: 99%

“…Salinity in water or soil acts in the reduction of osmotic potential, hampering water uptake by the plant, causing changes in the non-selective absorption of nutrients, thus affecting growth and gas exchange (SANTOS et al, 2017;SILVA et al, 2019). When evaluating the initial growth of lima bean under different levels of irrigation water salinity, Granja et al (2019), found that the increase in salts present in water inhibited the number of leaves and height of plants.…”

Section: Introductionmentioning

confidence: 99%

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Salt water irrigation in different cultivars of lima bean

Goes

Sousa

Freire³

et al. 2021

Revista Ciência Agronômica

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Lima bean (Phaseolus lunatus L.) is a crop with great economic and social importance for the Brazilian Northeast. The water crisis in recent years has affected crop production, especially in the semi-arid region. Thus, the use of lower quality waters (saline) becomes a necessary alternative, but it can affect the growth and yield of agricultural crops. The objective of this study was to evaluate the effect of salt stress on the initial growth and biomass accumulation of four lima bean cultivars. The experiment was carried out in a protected environment in a completely randomized experimental design in a 5 x 4 factorial scheme, with four replicates. The treatments consisted of 5 salinity levels in irrigation water with electrical conductivity (ECw) of 1.0, 2.0, 3.0, 4.0 and 5.0 dS m -1 and four cultivars: Branquinha (C1), Manteiguinha (C2), Espírito Santo (C3) and Orelha-de-vó (C4). The variables analyzed were plant height, number of leaves, leaf area, stem diameter, root length, shoot dry mass, root dry mass and total dry mass. At the end of the experiment, electrical conductivity of the soil saturation extract was evaluated. The cultivar Manteiguinha was more tolerant to salinity than the others, considering the variables number of leaves and plant height. However, it was not possible to identify variations in the tolerance of the four lima bean cultivars based on biomass production, indicating the need for further studies that can prove the existence of genetic variability in relation to the effects of salt stress on this species

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Gas exchanges and growth of cotton cultivars under water salinity

Cited by 5 publications

References 14 publications

Fisiologia e componentes de produção do algodoeiro sob estresse salino e aplicação de ácido salicílico

Fisiologia e componentes de produção do algodoeiro sob estresse salino e aplicação de ácido salicílico

Potassium fertilization as salt stress attenuator in sour passion fruit

Salt water irrigation in different cultivars of lima bean

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