Multivariate classification of cotton cultivars tolerant to salt stress

Marcelino, Aline Dayanna Alves de Lima; Fernandes, Pedro Dantas; Ramos, Jean Pierre Cordeiro; Dutra, Wellison Filgueiras; Cavalcanti, José Jaime Vasconcelos; Santos, Roseane Cavalcanti dos

doi:10.1590/1807-1929/agriambi.v26n4p266-273

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…As every cellular response involves a chain of events, the metabolism in tolerant plants is expected to be faster, giving them better adjustment in situations of internal adversity (Marcelino et al, 2022;Braz et al, 2019). In sensitive plants, these responses are slower, and supplementation of organic substances that are involved in osmotic adjustment or energy supply generally provides more effective contributions since they act as a support to overcome the negative effects of water restriction, while hydration is not reestablished (Barbosa et al, 2021;Shen et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Pyruvic acid as attenuator of water deficit in cotton plants varying the phenological stage

et al. 2023

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The lack of water during crop growth causes damage to any production system, especially when it occurs during the initial establishment or beginning of the reproductive stage. Although cotton can be properly managed in regions with water limitation, its yield is affected at different levels according to the genetics of the cultivar adopted. Exogenous application of some organic components has shown a stress-mitigating effect and can be a valuable procedure to enhance the yield of water stress-sensitive cultivars. The objective of this work was to evaluate the benefits of exogenous application of pyruvic acid (100 µM) in cotton plants under water deficit varying the phenological stage of the crop. The experiment was conducted in a greenhouse, where the plants were grown in pots and subjected to seven days of water suspension, initiated individually in stages V2 and B1. Each pot contained two plants. The treatments adopted were: T1 - control, T2 - water suppression; and T3 - water suppression + pyruvate application. The design was randomized blocks in a factorial scheme (3 × 3) with three replicates. The reductions in gas exchange and growth of the cultivars BRS Seridó, CNPA 7MH and FM 966 were more significant in the reproductive stage, especially for FM 966, which was more sensitive. Pyruvate application reduced the effects of water suppression on boll production by 31% in BRS Seridó and 34% in CNPA 7MH and FM 966.

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Section: Resultsmentioning

confidence: 99%

Pyruvic acid as attenuator of water deficit in cotton plants varying the phenological stage

et al. 2023

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“…In the cultivars BRS Seridó and FM 966, the drop in A occurred as a result of high transpiration rates and reduced carboxylation efficiency over the period assessed. In a study by Marcelino et al (2022), who subjected those same cultivars to moderate salinity Tolerance of cotton plants to saline stress (6 dS m -1 ) for 35 days, the authors reported that the cultivars BRS Seridó, CNPA ITA 90, and BRS Rubi behaved as tolerant cultivars as a function of the adjustment seen in the gs, E, and A of plants under stress. Under the severe stress condition used in the present study, tolerance changed due to the greater accumulation of salts in the cells, affecting the A and iWUE.…”

Section: Free Proline and Gas Exchange In Cotton Cultivars Subjected ...mentioning

confidence: 99%

Gas exchange and osmotic adjustment in cotton cultivars subjected to severe salt stress

Marcelino,

Barbosa,

Fernandes

et al. 2023

Braz. J. Biol.

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Salinity is harmful to crops when the concentration of soluble salts overcomes the salinity threshold of the crop, causing osmotic stress and limitations in plant growth. In this scenario, adopting tolerant cultivars is the most adequate strategy to minimize agricultural losses. However, the inheritance of tolerance depends on the genotype. From this perspective, this study assessed the tolerance to severe salt stress in 11 cotton cultivars based on gas exchange parameters and the free proline content. The cultivars were grown in a greenhouse and subjected to 34 days of saline irrigation (10 dS m-1), starting 45 days after seedling emergence (B1 phase). Plant growth was monitored weekly until the end of the salt stress period. The treatments consisted of a combination of two factors: eleven cultivars associated with two electrical conductivity levels of irrigation water (ECw: 0.3 and 10.0 dS m-1). The experimental design was in randomized blocks in a 11 × 2 factorial arrangement with three replications (66 plots), with the experimental unit consisting of one plant per plot. Salinity impacted plant growth, being reflected on the gas exchange and free proline data of most cultivars. However, BRS 286, FMT 705, BRS 416, and BRS Acácia, and CNPA 7MH withstood the effects of stress and osmotically adjusted to the salt stress conditions, thus minimizing the damage to growth. Those cultivars are the most indicated for improvement programs aiming at tolerance to salt stress based on the results found in this research.

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Multivariate classification of cotton cultivars tolerant to salt stress

Cited by 2 publications

References 16 publications

Pyruvic acid as attenuator of water deficit in cotton plants varying the phenological stage

Pyruvic acid as attenuator of water deficit in cotton plants varying the phenological stage

Gas exchange and osmotic adjustment in cotton cultivars subjected to severe salt stress

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