Effect of Photoperiod and Chlormequat on Apical Development and Growth in a Spring Wheat (Triticum aestivum) Cultivar

Craufurd, Peter; Cartwright, P. M.

doi:10.1093/oxfordjournals.aob.a087777

Cited by 38 publications

(44 citation statements)

References 14 publications

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“…Species, genotype, seeding rate, photoperiod, temperature, and water and nutrient status during the tillering period affect tiller production and head-bearing tillers (Langer 1972, Easson et al 1993, Peltonen-Sainio and Järvinen 1995, Crook and Ennos 1995. Spring wheat response to photoperiod was changed by antigibberellins applied at early growth stages (Hutley-Bull andSchwabe 1982, Craufurd andCartwright 1989). Under long-day conditions, apical development rate of wheat was retarded and more tillers were produced, mimicking development and growth under conditions of shorter photoperiod (Hutley-Bull andSchwabe 1982, Craufurd andCartwright 1989).…”

Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

“…Spring wheat response to photoperiod was changed by antigibberellins applied at early growth stages (Hutley-Bull andSchwabe 1982, Craufurd andCartwright 1989). Under long-day conditions, apical development rate of wheat was retarded and more tillers were produced, mimicking development and growth under conditions of shorter photoperiod (Hutley-Bull andSchwabe 1982, Craufurd andCartwright 1989). Chlormequat chloride seed treatment increased tiller number in barley and triticale (Naylor et al 1989), and in winter barley when applied before or during tillering (Naylor et al 1986).…”

Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

“…Chlormequat chloride seed treatment increased tiller number in barley and triticale (Naylor et al 1989), and in winter barley when applied before or during tillering (Naylor et al 1986). CCC applied to wheat foliage prior to shoot elongation resulted in more tillers (Tolbert 1960b, Humbries et al 1965, Craufurd and Cartwright 1989. Other types of PGR have been reported to promote tillering.…”

Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

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Plant growth regulators to manipulate oat stands

Rajala¹

2008

AFSci

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Plant growth regulators (PGRs) are exogenously applied chemicals that alter plant metabolism, cell division, cell enlargement, growth and development by regulating plant hormones or other biological signals. For example, some PGRs regulate stem elongation by inhibiting biosynthesis of gibberellins or through releasing ethylene. PGR effects are widely studied and reported on barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.), whereas there are only a few reports addressing oat (Avena sativa L.). This is likely to be a result of smaller acreage and lower intensity of oat management and production and hence a reduced need for stem shortening by PGRs. However, this is not the case for all cereal producing regions and there exists a need to understand the potential application of PGRs to oat production. This paper represents a review of the potential of PGRs to regulate stem elongation and other biological traits governing plant stand structure and yield components, with special emphasis on oat and its responses to PGRs. Yield improvement requires more heads per unit land area, more grains per head or heavier grains. Of these yield-determining parameters, the number of head bearing tillers and grain numbers per head, compared with grain weight, are more likely to be improved by PGR application. In the absence of lodging, PGR may reduce grain yield due to potential reduction in mean grain weight and/or grain number. Cultivation systems aiming at extensive yields with intensive use of inputs likely benefit from PGR applications more often compared with low or moderate input cultivation, for which cost effectiveness of PGRs is not frequently reached.

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Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

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Plant growth regulators to manipulate oat stands

Rajala¹

2008

AFSci

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“…The high HI in chlormequat-treated plants could be attributable to a higher partitioning ratio of assimilate to spike due to reducing culm length. However, Craufurd and Cartwright (1989) reported that the effect of chlormequat was similar to that of short days: flowering was delayed and tiller production increased. Thus, there is a possibility that a higher HI in chlormequat-treated plants was attributed to the slow plant development, which may increase productive tillers and survival rate of fl orets.…”

Section: Discussionmentioning

confidence: 99%

“…Although the primary aim of chlormequat application is preventing lodging, an increase in grain yield of wheat has been reported in Japan (Fukushima et al, 1990;Wada et al, 1991). Ecophysiological causes of the yield increase in wheat induced by chlormequat application have been studied in the UK (Craufurd and Cartwright, 1989;Olumekun, 1996), but not yet in Japan. On the other hand, excess shortening of plant height should lower the ability of the canopy to produce biomass by deteriorating leaf geometrical attributes.…”

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confidence: 99%

Effects of Reduction in Plant Height Induced by Chlormequat on Radiation Interception and Radiation-Use Efficiency in Wheat in Southwest Japan

Toyota

Shiotsu

Bian

et al. 2010

Plant Production Science

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Maximizing spring wheat productivity in the eastern Canadian Prairies: I. Yield, yield components, and lodging risk

et al. 2022

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Spring wheat (Triticum aestivum L.) yields across the Canadian prairies are rising, however, a yield gap remains between average yield and yield potential, which can be explored further under Prairie conditions. The high rates of nitrogen (N) fertilizer required for current high-yielding cultivars may increase lodging risk adding to this yield gap. The objectives of this study were to determine the influence of intensive management through N fertilization and plant growth regulator (PGR) application, on grain yield, yield components, and their relationships, in addition to lodging risk.Field trials were conducted at two locations in 2018 and 2019 in Manitoba, Canada, to evaluate three high-yielding spring wheat cultivars, three N management strategies, and the application of a PGR. Kernels per spike had the strongest overall linear relationship with grain yield (r 2 = .47), while the response of spikes per plant was highly related to yield response with alterations in N and PGR management practices (r 2 = .98). Splitting N fertilizer applications showed potential to reduce lodging risk of spring wheat, while maintaining yield and increasing protein. The PGR applications reduced lodging and increased grain yield by 91 kg ha −1 mainly through increases in kernels per spike. To achieve consistent yield increases, management practices should maximize early season N availability to target increases in spikes per plant and kernels per spike, thus a PGR application may be required to balance increased lodging risk. INTRODUCTIONWheat (Triticum aestivum L.) accounts for approximately 35% of the total Canadian cropland in annual production each year Abbreviations: CCC, chlormequat chloride; CNHR,

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Effect of Photoperiod and Chlormequat on Apical Development and Growth in a Spring Wheat (Triticum aestivum) Cultivar

Cited by 38 publications

References 14 publications

Plant growth regulators to manipulate oat stands

Plant growth regulators to manipulate oat stands

Effects of Reduction in Plant Height Induced by Chlormequat on Radiation Interception and Radiation-Use Efficiency in Wheat in Southwest Japan

Maximizing spring wheat productivity in the eastern Canadian Prairies: I. Yield, yield components, and lodging risk

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