Plant Growth Regulator Effects on Spring Cereal Root and Shoot Growth

Rajala, Ari; Peltonen‐Sainio, Pirjo

doi:10.2134/agronj2001.934936x

Cited by 119 publications

(71 citation statements)

References 25 publications

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“…Tiller production increased by TE application; these results are in agreement with the findings of other researchers (Ervin and Koski, 1998;Fagerness et al, 2002;Qian and Engelke, 1999;Rajala and Peltonen-Sainio, 2001) who found that application of TE increased turf density of treated turfgrasses compared with the control. The increase in the number of tillers as a result of using TE may be attributed to the role of these growth regulators in increasing available photoassimilates and cytokinin levels which enhanced cell division involved in the initiation and growth of new tillers from auxiliary meristems, consequently increasing tillering in turfgrasses (Ervin and Zhang, 2007;Pessarakli, 2008;Rajala and Peltonen-Sainio, 2001). Ervin and Koski (1998) reported that tiller production in perennial ryegrass (Lolium perenne L.) treated with TE increased by 67.9% compared with the non-treated control.…”

Section: Tiller Productionsupporting

confidence: 92%

Effects of Sequential Trinexapac-Ethyl Applications and Traffic on Growth of Perennial Ryegrass (Lolium perenne L.)

Amirikhah¹,

Eetemadi

Nikbakht³

et al. 2015

HST

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Mowing turfgrasses, especially fast growing species like perennial ryegrass, is one of the most time and money consuming tasks of their management. Trinexapac-ethyl (TE) is a popular plant growth regulator used to reduce mowing requirements, improve stress tolerance, and enhance turf quality. This study was conducted to investigate the effect of TE rate and frequency of applications on growth response and traffic tolerance of perennial ryegrass. The experiment was a split-plot laid out in a randomized complete block (RCB) design with three replications. TE was applied to main plots at 0.00, 0.25, and 0.50 kg a.i. ha -1 . Application pattern included an initial application, followed by two sequential applications at 6-wk intervals. Traffic treatment was applied to subplots with a cleated roller. Results demonstrated that TE consistently reduced vertical shoot growth, clippings dry weight, with maximum growth reduction of 59% and 65%, for 0.25 and 0.50 kg a.i. ha , respectively, occurring at 2 weeks after initial TE treatment (WAT). Traffic also dramatically reduced vertical shoot growth and clippings dry weight. Overall, quality of perennial ryegrass was enhanced by sequential TE applications, however, turf quality and surface coverage reduced greatly under traffic, regardless of TE treatment. Total chlorophyll, chlorophyll a and chlorophyll b and total carbohydrates (TC) contents were also positively influenced following sequential TE application. Our results indicated that TE reduces mowing frequency and enhances turf quality rather than influencing traffic resistance.

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Section: Tiller Productionsupporting

confidence: 92%

Effects of Sequential Trinexapac-Ethyl Applications and Traffic on Growth of Perennial Ryegrass (Lolium perenne L.)

Amirikhah¹,

Eetemadi

Nikbakht³

et al. 2015

HST

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“…Em cereais de inverno, o princípio ativo etil-trinexapac vem sendo utilizado em lavouras comerciais no Brasil, e seu uso tem sido indicado para a redução do crescimento das plantas em altura e para o fortalecimento dos entrenós. Embora haja escassez de informações científicas sobre os efeitos do uso de reguladores de crescimento na cultura da aveia-branca, essa prática pode ser uma alternativa para minimizar os efeitos negativos do acamamento de plantas (Rajala & Peltonen-Sainio, 2001;Rajala, 2004;Witkowicz, 2010).…”

Section: Introductionunclassified

Redução do acamamento em aveia-branca com uso do regulador de crescimento etil-trinexapac

Hawerroth

Silva

Souza

et al. 2015

Pesq. agropec. bras.

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O objetivo deste trabalho foi avaliar os efeitos da aplicação de concentrações do regulador de crescimento etil-trinexapac na altura de planta, no acamamento e na produtividade de grãos da cultivar de aveia-branca Barbarasul, em diferentes ambientes de cultivo e doses de nitrogênio. Os experimentos foram conduzidos nas safras 2010 e 2011 nos municípios de Capão do Leão e Augusto Pestana, no Estado do Rio Grande do Sul, e nas safras 2010 e 2012 no Município de Lages, no Estado de Santa Catarina. Utilizou-se o delineamento de blocos ao acaso, em arranjo fatorial 4x2x6 (dose de etil-trinexapac, estádio de desenvolvimento da planta e ambiente), com quatro repetições constituídas por parcelas úteis de 3,0 m2. Em cada ambiente, realizou-se adubação nitrogenada com 30 e 90 kg ha-1 de N. Foram avaliados os caracteres altura de planta, percentagem de acamamento e produtividade de grãos. A aplicação do regulador de crescimento etil-trinexapac nas doses de 100 a 150 g i.a. ha-1 em plantas de aveia-branca 'Barbarasul', nos estádios E31 e E32, reduz a altura das plantas e a percentagem de acamamento, sem prejuízos à produtividade de grãos. A intensidade da redução do acamamento depende das características do ambiente de cultivo.

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“…Such measures can be divided into three main categories: (i) the selection and breeding of genotypes with improved drought tolerance; (ii) an increase in the soil retention capacity and reduction of evaporation from soil surface, and (iii) cultivation measures improving the efficient use of water by plants, which include, for example, the use of growth regulators. In general, the growth regulators can contribute to improving effective use of water in particular by increasing the rooting depth or root water extraction from soil (Marcum and Jiang 1997), increasing the root:shoot ratio (Rajala and Peltonen-Sainio 2001), reducing leaf area (Beasley et al 2007) and accumulation of osmoregulatory substances (Akram et al 2012), increasing the accumulation of antioxidants (Wu and von Tiedemann 2001), supporting stomatal regulation (Bingham and McCabe 2006), reducing rate of leaf senescence (Cromey et al 2004) etc. However, very often contradictory effects of plant regulators on plant physiology and yield formation under water deficit are reported (e.g.…”

mentioning

confidence: 99%

Effect of application of growth regulators on the physiological and yield parameters of winter wheat under water deficit

Barányiová¹,

Klem²

2016

PLANT SOIL ENVIRON

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The objective of this study was to evaluate the effect of growth regulator applications on yield and physiological parameters of winter wheat (Triticum aestivum L.) under water deficit. Water deficit was induced artificially by using rain-out shelters in period between booting and late milk ripeness. The effect of growth regulators was evaluated in two contrast years in terms of yield formation (2014)(2015). In both years the water deficit caused a significant reduction of grain yield. The negative effect of water deficit was partly alleviated by application of growth regulators. However, the effect of individual growth regulators varied depending on year. In favourable conditions for grain filling (2014) the alleviating effect was more pronounced in application of azoxystrobin which slows down the leaf senescence. On the contrary, in the year with suitable conditions for tillering (2015), the alleviating effect was most apparent in application of chlormequate-chloride. The applications of trinexapac-ethyl and ethephon showed small reduction of negative effect of water deficit consistently in both years. The CO 2 assimilation rate and stomatal conductance were recovered particularly by applications of chlormequate-chloride and azoxystrobin. Chlorophyll content and chlorophyll fluorescence parameters were more affected by water deficit in 2014, and the alleviating effect of growth regulators corresponded with yield response.

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Plant Growth Regulator Effects on Spring Cereal Root and Shoot Growth

Cited by 119 publications

References 25 publications

Effects of Sequential Trinexapac-Ethyl Applications and Traffic on Growth of Perennial Ryegrass (Lolium perenne L.)

Effects of Sequential Trinexapac-Ethyl Applications and Traffic on Growth of Perennial Ryegrass (Lolium perenne L.)

Redução do acamamento em aveia-branca com uso do regulador de crescimento etil-trinexapac

Effect of application of growth regulators on the physiological and yield parameters of winter wheat under water deficit

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