Cotton root and shoot growth as affected by application of mepiquat chloride to cotton seeds

Almeida, Adriana Queiroz de; Rosolem, Ciro Antônio

doi:10.4025/actasciagron.v34i1.12369

Cited by 20 publications

(14 citation statements)

References 20 publications

(6 reference statements)

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“…Treating the seeds instead of the leaves also affords savings in the quantity of spraying in the production areas, resulting in reduced production costs. Similar results were found by Almeida and Rosolem (2012) in a greenhouse study evaluating the development of roots and shoots of the cotton cultivar cv. FM 993 from seeds treated with MC.…”

Section: Resultssupporting

confidence: 76%

“…Agronomy Maringá, v. 37, n. 3, p. 361-366, July-Sept., 2015 Mateus et al (2004), the activity of mepiquat chloride via foliar application to the cotton plants requires a minimum of 16 hours for the full effect of the product, and if there is rain during this period, an additional new application is then required. Studies indicate that growth regulators can alternatively be applied to the seeds, with the advantages of an easier practical application and the reduction of the cotton plants' initial development after emergence (FERRARI et al, 2010;NAGASHIMA et al, 2005), without affecting root system development (ALMEIDA; ROSOLEM, 2012). Another favorable aspect is protection against adverse conditions during the first application of the growth regulator, which can prevent the product from producing the desired results (MATEUS et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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<b>Vegetative growth response of cotton plants due to growth regulator supply via seeds

et al. 2015

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ABSTRACT. The global cotton industry is distinguished by its numerous industrial uses of the plume as well as by high production costs. Excessive vegetative growth can interfere negatively with productivity, and thus, applying growth regulators is essential for the development of the cotton culture. The objective of this study was to evaluate the development and yield of the cotton cultivar FMT 701 with the application of mepiquat chloride to seeds and leaves. The experimental design used a randomized block design with four replications, arranged in bands. The treatments consisted of mepiquat chloride rates (MC) (0, 4, 6, 8 and 10 g a.i. kg -1 of seeds) applied directly to the cotton seeds and MC management by foliar spray using a 250 mL ha -1 rates that was administered under the following conditions: divided into four applications (35, 45, 55 and 65 days after emergence); as a single application at 70 days; and without the application of the product. The mepiquat chloride applied to cotton seeds controls the initial plant height and stem diameter, while foliar application reduces the height of the plants. After application to seed, foliar spraying MC promotes increase mass of 20 bolls, however no direct influence amount bolls per plant and yield of cotton seed. Higher cotton seed yield was obtained with a rate of 3.4 g a.i. MC kg -1 seeds.Keywords: mepiquat chloride, growth, yield components.Resposta do crescimento vegetativo do algodoeiro em relação à aplicação de regulador de crescimento via sementes RESUMO. A indústria mundial do algodão distingui-se por suas numerosas utilizações industriais da pluma, bem como pelos elevados custos de produção. Crescimento vegetativo excessivo pode interferir negativamente na produtividade e, por conseguinte, a aplicação de reguladores de crescimento é essencial para o desenvolvimento da cultura do algodão. O objetivo deste estudo foi avaliar o desenvolvimento e a produtividade do algodoeiro cultivar FMT 701 em função de aplicação de cloreto de mepiquat via sementes e folhas. O delineamento experimental utilizado foi de blocos ao acaso com quatro repetições, dispostos em faixas. Os tratamentos consistiram de doses de cloreto de mepiquat (CM) (0, 4, 6, 8 e 10 g ia kg -1 de sementes) aplicadas diretamente nas sementes de algodão e do manejo de CM via pulverização foliar na dose de 250 mL ha -1 da seguinte forma: divididos em quatro aplicações (35, 45, 55 e 65 dias após a emergência), como uma única aplicação, aos 70 dias, e sem a aplicação do produto. O cloreto de mepiquat aplicado via sementes de algodão controla a altura inicial das plantas e o diâmetro do caule, enquanto que a aplicação foliar reduz a altura das plantas. Após aplicação nas sementes, pulverização foliar de CM promoveu aumento da massa de 20 capulhos, no entanto não promoveu influência na quantidade de capulhos por planta e na produtividade de algodão em caroço. Maior rendimento de algodão em caroço foi obtido com dose de 3,4 g ia de CM kg -1 de sementes.Palavras-chave: cloreto de mepiquat, crescimento, com...

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Section: Resultssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

<b>Vegetative growth response of cotton plants due to growth regulator supply via seeds

et al. 2015

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“…In both situations, the MC effect was potentized by water deficit. In a recent study, Almeida & Rosolem (2012) observed that the application of MC to cotton seeds decreased shoot length, but had no significant effect on dry matter production, root length, shoot:root ratio or leaf area:root length ratio. However, Nagashima et al (2011) concluded that cotton seeds treated with MC decreased shoot dry matter by 62%, while the leaf area decreased 52%.…”

Section: Characteristicmentioning

confidence: 96%

Water deficit in cotton plant originated from seeds treated with growth regulator

Ferreira¹,

Lamas²,

Brito³

et al. 2013

Pesqui. Agropecu. Trop.

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Mepiquat chloride (MC) is widely used for controlling cotton plant growth. Shoot growth modifications may affect root growth and, consequently, interfere with the cotton sensitivity to water deficit. This study aimed at evaluating the water deficit effects, in initial phenological stages of cotton plants from seeds treated with MC doses, on shoot and root growth. Two experiments were carried out in a greenhouse, in Santa Helena de Goiás, Goiás State, Brazil, in a randomized blocks design, in a 4x4 factorial scheme: four growth regulator doses (0 g, 2 g, 4 g and 8 g of active ingredient of MC per kg of seed) and four water stress conditions (without water deficit and initial water deficit in three vegetative growth stages: V1, V3 and V5), with four replications. Shoot and root dry matter, as well as cotton plant height, decreased with the increase of MC doses. The water deficit between V1 and V5 reduced shoot and root dry matter. The water deficit also increased the inhibitory effect of MC applied via seeds on cotton plants shoot and root dry matter.

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“…Mepiquat chloride (1,1-dimethylpiperidinium chloride), a plant growth regulator, inhibits the biosynthesis of gibberellic acid concentrations within plant cells, which results in reduced cell size and plant growth (Rademacher, 2000;Almeida and Rosolem, 2012). It modulates plant architecture by reducing leaf area and internodes length, improves light penetration, exalts boll set at lower sympodial branches and first position bolls, and results in improved yield (Nuti et al, 2006;Mao et al, 2014).…”

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confidence: 99%

Comparative Productivity and Seed Nutrition of Cotton by Plant Growth Regulation under Deficient and Adequate Boron Conditions

et al. 2018

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-Plant growth regulators (PGRs) potentially improve the productivity and nutritional quality of crops through modulation of morphology, physiology and nutrient dynamics within plants. However, the effect of PGRs may differ under environments with deficient and adequate nutrients. Here the role of mepiquat chloride (MC) on the yield and seed nutritional quality of cotton was explored under boron (B) deficiency and adequate conditions in a two-year field study. Mepiquat chloride was foliar-applied at different dosages (0 and 70 mg L -1 ) and growth stages (squaring and flowering) and B was applied into soil (0, 1, 1.5, 2 and 2.5 kg ha -1 ) to establish B deficiency and adequate levels. Seed cotton yield and seed nutritional quality were substantially higher under adequate B conditions, compared to B deficiency. Nonetheless, MC applications improved the seed cotton yield, seed oil yield, seed protein yield and concentration of seed mineral nutrients (N, P, K, B, Zn and Fe except for Mn) under both B deficiency and adequate conditions. Nonetheless, the improvement in all traits caused by MC application was greater under adequate B conditions (2-2.5 kg ha -1 B), compared to B deficiency conditions. Furthermore, the application of MC at squaring proved more beneficial in improving the seed cotton yield and nutritional quality, compared to the flowering stage. In conclusion, MC application improves seed cotton yield and cotton seed nutritional quality under both deficient and adequate B conditions, through an improved nutrient accumulation in seed tissues; however, the efficacy of MC is affected by B deficiency. Keywords

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Cotton root and shoot growth as affected by application of mepiquat chloride to cotton seeds

Cited by 20 publications

References 20 publications

<b>Vegetative growth response of cotton plants due to growth regulator supply via seeds

<b>Vegetative growth response of cotton plants due to growth regulator supply via seeds

Water deficit in cotton plant originated from seeds treated with growth regulator

Comparative Productivity and Seed Nutrition of Cotton by Plant Growth Regulation under Deficient and Adequate Boron Conditions

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