Aplicação de ácido salicílico em plantas de arroz submetidas a competição com arroz-vermelho

Fermiano, Alessandro Porto; Kaseker, Jéssica Fernandes; Nohatto, Marcos André; Oliveira, Jadson Daminelli de; Rosa, Eliete de Fátima Ferreira da; Nunes, Daiane Heloisa

doi:10.30969/acsa.v14i3.990

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…Para Marchezan et al (2011), a redução do banco de sementes do arroz vermelho pode ocorrer pela utilização da tecnologia Clearfield ® por mais de dois anos consecutivos, juntamente com a utilização da rotação de culturas ou o pousio da área. Fermiano et al (2018), observaram que a competição entre o arroz cultivado e o arroz vermelho tem a capacidade de reduzir número de afilhos, estatura de plantas e produtividade de grãos.…”

Section: Resultsunclassified

Viabilidade De Sementes De Plantas Daninhas Em Solo De Várzea Com Arroz Irrigado

Redin¹,

Webers²,

Finken³

et al. 2020

RBHerbicidas

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O banco de sementes de plantas daninhas do solo é muito dinâmico e afetado por diversos fatores de manejo de solo, planta e condições ambientais. Neste estudo foi avaliada a viabilidade imediata de germinação das sementes de plantas daninhas em solo de várzea cultivado com arroz irrigado por inundação. Foram utilizadas três profundidades de solo: 0-10 cm, 10-20 cm e 20-40 cm. Em condições de laboratório, 800 g de solo de cada profundidade em cinco repetições foram colocadas em garrafas pet cortadas a 20 cm de altura, e posteriormente, colocadas em incubadora a 25 ºC com 12 horas de fotoperíodo. O conteúdo de umidade do solo foi monitorado pela perda de peso, e quando necessário foi adicionado água. O experimento teve duração de 63 dias com contagem e identificação semanal das plantas daninhas emergidas. Foram observadas quatro espécies de plantas daninhas: azevém (Lolium multiflorum Lam.), cruz de malta (Ludwigia longifólia DC.), tapete verde (Callitriche deflexa Engelm) e arroz vermelho (Oriza sativa L.). A emergência de plantas foi maior na profundidade de 0-10 cm até os 42 dias. Observou-se dominância na emergência de plantas de Callitriche deflexa Engelm em relação às outras espécies na profundidade de 10-20 cm (média 121,6 plantas). A profundidade de 0-10 cm de solo apresenta a maior diversidade de sementes viáveis de plantas daninhas. A profundidade de 10-20 cm de solo propicia maior acúmulo de sementes viáveis de Callitriche deflexa Engelm. A viabilidade de sementes de plantas daninhas é desfavorecida na profundidade de 20-40 cm do solo.

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Section: Resultsunclassified

Viabilidade De Sementes De Plantas Daninhas Em Solo De Várzea Com Arroz Irrigado

Redin¹,

Webers²,

Finken³

et al. 2020

RBHerbicidas

View full text Add to dashboard Cite

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“…According to [ 8 , 9 ], silicon (Si) plays an important physiological and metabolic role in plants, mitigating the adverse effects of water stress in crops and increasing water use efficiency and antioxidant activity. Salicylic acid (SA) is another compound that has been evaluated for its potential use, as it is a phenolic compound with regulatory action in several physiological processes in plants, and its application is evaluated as a promising strategy to increase the tolerance of crops to biotic, abiotic, and xenobiotic stresses [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Do Silicon and Salicylic Acid Attenuate Water Deficit Damage in Talisia esculenta Radlk Seedlings?

Figueiredo,

Scalon,

Santos

et al. 2023

Plants

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Water deficit is one of the factors that most influence plant growth and yield. Thus, this study aimed to evaluate the effect of silicon and salicylic acid application and water deficit on the growth and photosynthetic and osmoregulatory metabolism of Talisia esculenta Radlk. seedlings and their recovery potential after the resumption of irrigation. Six treatments were performed: irrigation, irrigation suspension, irrigation suspension + silicon at 0.5 g L−1, irrigation suspension + silicon at 1.0 g L−1, irrigation suspension + salicylic acid at 50 mg L−1, and irrigation suspension + salicylic acid at 100 mg L−1. The evaluations were carried out at the beginning of the experiment, at 10 and 15 days after irrigation suspension, when the seedlings showed a photosynthetic rate close to zero, and at recovery. The plants were subjected to water restriction for up to 15 days, then re-irrigated until the recovery point, which was monitored based on the photosynthetic rate. Silicon application attenuated the harmful effects of water deficit on gas exchange and initial fluorescence, promoted proline accumulation in the leaf and root, and provided higher seedling quality. Salicylic acid application contributed to the maintenance of the relative water content of leaves during the water deficit period. Silicon and salicylic acid applications can attenuate the harmful effects of water stress, with silicon being the most effective agent in maintaining its growth and metabolism.

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“…To attenuate effects of saline stress, organic compounds can be applied exogenously in seeds and plants (Melloni et al, 2012;Fermiano et al, 2018). In this sense, the use of antioxidants promotes resilience in plants by protecting seeds against excessive ROSs production, as they produce enzymes to sequest or degrade free radicals, or stimulate seed vigor and germination (Ratnam, Ankola, Bhardwaj, Sahana, & Kumar, 2006;Burguieres, McCue, Kwon, & Shetty, 2007;Macedo, Silva, Santos, Oliveira, & Souza, 2017).…”

Section: Introductionmentioning

confidence: 99%

Attenuation of salt stress by lycopene on common bean seeds

Nobre

Macedo

Pereira

et al. 2022

Acta Sci. Biol. Sci.

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Salinity is a major abiotic stress that adversely affects several physiological and biochemical aspects of plants. Antioxidants can be used as a potential remediation mechanism to promote plant resilience. Therefore, the objective of the present study was to evaluate increasing doses of the antioxidant lycopene on the germination and initial growth of common bean seedlings under conditions of salt stress. Seeds were treated with the following lycopene concentrations: 0.018; 0.036; 0.072; 0.144; and 0.288 g L-1 and two controls (negative and positive) and evaluated under two growth conditions (without and with salt stress) for physiological quality and pigment content. Data were analyzed by completely randomized design, in 2 x 7 factorial (two growth conditions, with paper towel moistened with water or salt solution x seven treatments, including five lycopene doses and two controls), in four replicates of 50 seeds by concentration. With the results of the analysis of variance, growth conditions (without and with salt stress) were compared by the Tukey test (5%), and the effects of lycopene doses were analyzed by polynomial regression. Lycopene promoted tolerance of bean seeds to salt stress and had a positive influence on the attenuation of salt harmful effects to the initial growth of seedlings, mainly at the doses of 0.072 g L-1 and 0.144 g L-1.

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Aplicação de ácido salicílico em plantas de arroz submetidas a competição com arroz-vermelho

Cited by 4 publications

References 11 publications

Viabilidade De Sementes De Plantas Daninhas Em Solo De Várzea Com Arroz Irrigado

Viabilidade De Sementes De Plantas Daninhas Em Solo De Várzea Com Arroz Irrigado

Do Silicon and Salicylic Acid Attenuate Water Deficit Damage in Talisia esculenta Radlk Seedlings?

Attenuation of salt stress by lycopene on common bean seeds

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