Influence of Trinexapac-Ethyl on Respiration of Isolated Wheat Mitochondria

Heckman, Neil L.; Elthon, Thomas E.; Horst, Garald L.; Gaussoin, Roch E.

doi:10.2135/cropsci2002.0423

Cited by 32 publications

(31 citation statements)

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“…On the other hand, reduced in yield with increasing rates is the result of smallest photosynthetic area and lower stored reserves for translocation at grain filling time, as the plants showed lower dry mass. In addition, Heckman et al (2002) reported effects of trinexapac-ethyl on the respiration of wheat plants, affecting metabolism. Quadratic responses for grain yield were also found for the cultivars OR-1, CD-104, CD-105, Alcover, Onyx, Vanguarda, Supera, CEP-24 with the rates 0, 31.2, 62.4, 93.7, 125, 156.2 g ha -1 of trinexapac-ethyl (Zagonel & Fernandes, 2007).…”

Section: Use Of Growth Retardants In Wheatmentioning

confidence: 99%

Use of growth retardants in wheat

et al. 2009

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-In general, lodging has been controlled by restricting nitrogen fertilizer application and/or using short cultivars. Growth retardants can also be used to solve this problem.The objective of this study was to evaluate the effect of rates and application times of three growth retardants on Pioneiro wheat cultivar. The trial was carried out in Viçosa-MG, from May to September 2005, in a factorial and hierarchical scheme, in a randomized block design with four replications and a control treatment. The treatments consisted of 500, 1,000 and 1,500 g ha -1 of chlormequat; 62.5, 125 and 187.5 g ha -1 of trinexapacethyl and 40, 80 and 120 g ha -1 of paclobutrazol applied at growth stages 6 or 8, growth stage used on the scale of Feeks and Large, and a control treatment without growth retardant application. Only trinexapac-ethyl and chlormequat were efficient in reducing plant height; the effect of chlormequat and paclobutrazol on plant height was independent of the application time, but the trinexapac-ethyl at growth stage 8 produced shorter plant height than at stage 6. Increasing growth retardant rates produced shorter plant heights; chlormequat and paclobutrazol did not affect grain yield. However, the highest trinexapac-ethyl rates reduced wheat yield.

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Section: Use Of Growth Retardants In Wheatmentioning

confidence: 99%

Use of growth retardants in wheat

et al. 2009

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“…O trinexapacethyl é um redutor de crescimento utilizado em cere ais de in ve rn o que promov e re dução acentuada do comprimento do caule (Fagerness & Penn er, 1998) e, cons eqüente mente, da alt ura da pla nta , evi tan do o aca mament o (Amrein et al, 1989). O trinexapac-ethyl atua nas plantas, reduzindo a elongação celular no estádio vegetativo e obstruindo a biossíntese do ácido giberélico (Heckman et al, 2002).…”

Section: Introductionunclassified

Doses e épocas de aplicação de redutor de crescimento afetando cultivares de trigo em duas doses de nitrogênio

Zagonel

Fernandes²

2007

Planta daninha

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RESUMO -Os redutores de crescimento têm sido utilizados com sucesso em trigo, evitando o acamamento, mas a recomendação de uso não diferencia cultivares quanto ao porte. Visando determinar a dose e a época de aplicação mais adequadas de trinexapac-ethyl (Moddus), em cultivares de trigo, realizaram-se experimentos na Fazenda Escola da Universidade Estadual de Ponta Grossa, no ano de 2005. O delineamento experimental foi de blocos ao acaso, em esquema fatorial 2 x 2 x 6, com três repetições para cada cultivar de trigo. Os tratamentos constaram de duas doses de nitrogênio (50 e 240 kg ha -1 ), duas épocas de aplicação de trinexapac-ethyl (entre o 1 o e o 2 o nó e entre o 2 o e o 3 o nó perceptí-vel) e de seis doses de trinexapac-ethyl (0, 31,2, 62,5, 93,7, 125,0 e 156,2 g ha -1 ). Foram utilizados oito cultivares de trigo com diferentes respostas ao acamamento: OR-1, CD-104 e CD-105 (resistentes), Alcover, Ônix e Vanguarda (moderadamente resistentes), Supera (moderadamente suscetível) e CEP-24 (suscetível). Avaliaram-se características agronômicas, componentes da produção e produtividade. O clima ameno não foi favorável à ocorrência de acamamento, que foi observado somente para as menores doses de trinexapac-ethyl no cultivar CEP-24. A dose de nitrogênio afetou características da planta e a produtividade de alguns cultivares. O estádio de aplicação de trinexapac-ethyl não afetou de forma substancial a produtividade, e sim a altura das plantas, que foi menor quanto mais tardia a aplicação. Em geral, a equação de ajuste da produtividade em relação às doses de trinexapacethyl foi quadrática, ocorrendo aumento da produção com o aumento da dose do redutor, até um limite, variável de acordo com o cultivar.Palavras-chave: altura de planta, acamamento de planta, produtividade, trinexapac-ethyl, Triticum aestivum. (0, 31.2, 62.5, 93.7, 125.0 and 156.2 g ha -1 ). Eight wheat cultivars of different lodging performances were used: Alcover, Ônix and Vanguarda (moderately resistant), Supera (moderately susceptible), ABSTRACT -Growth reducers have been used successf ully in wheat, preventing lodging, but use recommendation does not differentiate cultivar height. Experiments were conducted at the UEPG School Farm in 2005 to determine the rate and time of trinexapac-ethyl (Moddus) application in wheat cultivar. The experimental was arranged in complete randomized blocks, in a 2 x 2 x 6 factorial scheme, with three repetitions for each wheat cultivar. The treatments consisted of two nitrogen rates (50 and 240 kg ha -1 ), two trinexapac-ethyl application times (between first and second knot and between second and third perceivable knot) and six trinexapac-ethyl rates

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“…Qian and Engelke (1999) reported that photosynthesis rates of zoysiagrass (Zoysia matrella L.) increased in response to TE treatments. TE has been shown to reduce respiration in plants (Heckman et al, 2002). Shoot growth suppression triggered by TE encouraged photosynthate and nutrient allocation to other sink tissues such as stems and roots (Cooper et al, 1988;Fagerness et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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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Influence of Trinexapac-Ethyl on Respiration of Isolated Wheat Mitochondria

Cited by 32 publications

References 0 publications

Use of growth retardants in wheat

Use of growth retardants in wheat

Doses e épocas de aplicação de redutor de crescimento afetando cultivares de trigo em duas doses de nitrogênio

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

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