Tratamento de sementes de milho sobre o desempenho de plântulas em condições de estresse salino

Barbieri, Ana Paula Piccinin; Huth, Caroline; Zen, Humberto Davi; Beche, Manoela; Mertz-Henning, L. M.; Lopes, Sidinei José

doi:10.4322/rca.ao1381

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…Ausência de resposta significativa ao bioestimulante para a altura em plantas submetidas ao estresse salino também foram observada por Barbieri et al (2014) e Oliveira et al (2013), para as culturas do milho e feijão caupi, respectivamente. Não houve efeito do bioestimulante sobre o número de folhas independente da salinidade da água de irrigação, obtendo-se NF médio de 9,2 folhas por planta.…”

Section: Resultsunclassified

“…O efeito do bioestimulante sobre a MST é resultante da resposta já apresentada para as demais variáveis de biomassa (MSC, MSF, MSR, MSP), e está em concordância com estudos desenvolvidos por outros autores em diferentes espécies de interesse agronômico, como milho (BARBIERI et al, 2014;SANTOS et al, 2013), maracujá (ECHER et al, 2006;FERRAZ et al, 2014), soja (KLAHOLD et al, 2006), feijão comum (ÁVILA et al, 2010), entre outras. Na Figura 2F é apresentada a resposta aos tratamentos aplicados sobre a área foliar específica (AFE), na qual se verifica que não houve efeito significativo da aplicação de Stimulate ® sobre a AFE na ausência de estresse salino (0,5 dS m -1 ), obtendose AFE média de 301,9 cm 2 g -1 MSF.…”

Section: Resultsunclassified

“…Esses autores verificaram que o aumento da salinidade do solo decorrente ao uso de água com a qualidade inferior na irrigação reduziu expressivamente a produção de matéria seca, as taxas de assimilação líquida, crescimento absoluto e relativo, área foliar total e útil, fotossíntese, condutância estomática, transpiração, eficiência do uso de água e produtividade. No entanto, para a cultura do milho pipoca ainda são poucos os estudos enfocando o efeito da salinidade (BARBIERI et al, 2014;OLIVEIRA et al, 2009).…”

Section: Introductionunclassified

“…No entanto, alguns autores já relataram que o efeito benéfico de bioestimulantes tem sido inibido em plantas cultivadas sob estresse hídrico (ÁVILA et al, 2010) ou salino (BARBIERI et al, 2014;OLIVEIRA et al, 2013). Diante do exposto, este trabalho foi desenvolvido com o objetivo de avaliar o desenvolvimento inicial do milho pipoca em função do tratamento de sementes com bioestimulante Stimulate ® e uso de água salina.…”

Section: Introductionunclassified

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Use of biostimulants in relieving salt stress in popcorn

Oliveira

Medeiros

Cunha

et al. 2016

Revista Ciência Agronômica

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) e quatro doses de bioestimulante aplicado via tratamento de sementes (0; 5; 10 e 20 mL kg -1 de sementes), com cinco repetições. Utilizou-se o bioestimulante comercial Stimulate ® (0,009% citocinina, 0,005% giberelina e 0,005% de auxina) e as plantas foram coletadas aos 50 dias após a semeadura. Foram avaliadas as seguintes variáveis: altura de plantas, diâmetro do colmo, número de folhas, área foliar, massa seca de colmo, massa seca de folhas, massa seca de raiz, massa seca de pendão, massa seca total e área foliar específica. O uso de água salina na irrigação provocou redução na maioria das variáveis de crescimento do milho doce, independentemente do tratamento de sementes com bioestimulante. O tratamento de sementes com Stimulate ® promove o desenvolvimento de plantas de milho pipoca, mais não inibiu nem amenizou o efeito da salinidade sobre as plantas. Palavras-chave: Zea mays. Fitorregulador. Qualidade da água.ABSTRACT -The use of biostimulants has become widespread in Brazilian agriculture, promoting growth and increased crop yields. However, studies on the use of these substances in plants under stress are still being developed, especially for salt stress. The aim was to evaluate the use of bio-stimulants to relieve salt stress in popcorn. The experiment was carried out in a greenhouse on the campus of the Federal Rural University of the Semi-Arid in Mossoró, in the State of Rio Grande do Norte, Brazil. A completely randomised design was used, with treatments distributed in 2 x 4 factorial scheme, representing two levels of salinity of the irrigation water (0.5 and 4.5 dS m -1 ) and four levels of biostimulant, applied by seed treatment (0, 5, 10 and 20 ml kg -1 seed), with five replications. The commercial biostimulant Stimulate® was used (0.009% cytokinin, 0.005% gibberellin and 0.005% auxin), with the plants being harvested 50 days after sowing. The following variables were evaluated: plant height, stem diameter, number of leaves, leaf area, stem dry weight, leaf dry weight, root dry weight, tassel dry weight, total dry weight and specific leaf area. The use of saline water for irrigation caused a reduction in most growth variables in the sweet corn, regardless of seed treatment with biostimulants. Seed treatment with Stimulate® promotes development in popcorn, but did not inhibit or lessen the effect of salinity on the plants.

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Section: Resultsunclassified

Section: Introductionunclassified

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Use of biostimulants in relieving salt stress in popcorn

Oliveira

Medeiros

Cunha

et al. 2016

Revista Ciência Agronômica

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“…Conus et al (2009) did not obtain significant effects on the germination of maize when submitted to differentiated osmotic potentials (ψ s ), corroborating the results obtained in the present research. However, Barbieri et al (2014) found decreasing values for germination percentage as the ψ s became more negative.…”

Section: Resultsmentioning

confidence: 90%

Emergence and growth of maize submitted to inoculant doses associated with saline water irrigation

Oliveira

Nascimento

et al. 2020

Pesqui. Agropecu. Trop.

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Salinity, in general, affects the plant growth and development, making it a limiting problem for the agricultural production. This study aimed to evaluate the effect of inoculant doses of Azospirillum brasilense on the emergence and growth of maize submitted to salinity concentrations of the irrigation water. The experiment was carried out in a greenhouse, with a randomized blocks design, in a 3 x 5 factorial [A. brasilense doses (0.0, 0.32 and 0.48 mL/100 seeds) and levels of electrical conductivity of the water (0.3, 0.6, 1.1, 1.7 and 2.3 dS m-1)], in 4 blocks, totaling 60 experimental units. The emergence percentage, emergence speed index, plant height, stem diameter, number of leaves, leaf area, leaf dry mass, stem dry mass, tassel dry mass and root dry mass were evaluated. The treatments between salinity and inoculation had no effect on seedling emergence. The salinity significantly affected growth; however, the number of leaves increased in 12.8 % (V8) and 18.8 % (V10), when comparing the difference between the lowest and highest studied salinity. As for the plant height, there was an increase of 3.7 % up to the threshold salinity of the crop (1.1 dS m-1). There was an increase in the root dry mass with the application of inoculant doses at each studied salt level.

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Use of biostimulants in millet as strategies for tolerance to salinity of irrigation water

et al. 2022

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Millet is grass with high forage potential in semi-arid regions, both for its versatility of use and nutritional quality. The objective of this study was to evaluate the influence of a biostimulant and the plant extract (Cyperus rotundus) on the growth forage, and grain production in millet (cultivar IPA BULK 1BF) submitted to salt stress conditions. The research was carried out at the Serra Talhada Academic Unit, Federal Rural University of Pernambuco, in the Semiarid region of the Northeast of Brazil, from February to April 2017. The experiment was installed in randomized blocks, in a 3x4 factorial scheme, composed of a biostimulant (ACADIAN®), nutsedge extract, and the control, in four salinity levels of the irrigation water, electrical conductivities of 0, 1, 2 and 4 dS m-1, with four repetitions. Biometric analysis of all plants was carried out weekly to monitor crop growth. At 77 days after emergence, measures of net CO2 assimilation and transpiration rates were obtained. The harvest occurred with the maturation of the grains (ED9), being analyzed the dry mass of the different morphological components of the plant. The biostimulant at the level of 2 dS m-1 promoted an increase of 66% in the leaf area of millet compared to the control. With 4 dS m-1, the nutsedge extract provided an increase of 253% in the leaf area compared to the control. These expressive results obtained with the use of these compounds reflected in a production of dry leaf blade mass. The IPA BULK 1 BF millet cultivar has tolerance to the salinity levels studied in this research. The nutsedge extract and the biostimulant are alternatives capable of stimulating the growth and the production of forage of millet under the presence of salts in the irrigation water, however, these compounds have no influence on grain production

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Tratamento de sementes de milho sobre o desempenho de plântulas em condições de estresse salino

Cited by 5 publications

References 13 publications

Use of biostimulants in relieving salt stress in popcorn

Use of biostimulants in relieving salt stress in popcorn

Emergence and growth of maize submitted to inoculant doses associated with saline water irrigation

Use of biostimulants in millet as strategies for tolerance to salinity of irrigation water

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