Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied

Ramburan, S.; Greenfield, Peter

doi:10.1080/02571862.2007.10634806

Cited by 14 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Increased yield was derived from increased grains per spike and grain mass, and there was also an improvement in test mass and protein, falling number, and a reduction in pre-harvest sprouting. In barley given excessive N fertilization, application of chlormequatchloride alone did not elicit a response; however, ethephon applied alone or in combination with chlormequatchloride shortened plant height and lodging at one location, but unfortunately also reduced grain yield (Ramburan & Greenfield, 2007b). The ethephon treatments exerted their detrimental effect on yield by decreasing the number of grains per spike and grain mass.…”

Section: Growth Regulationmentioning

confidence: 99%

Crop physiology: A perspective for southern Africa

Modi

Greenfield

2010

South African Journal of Plant and Soil

View full text Add to dashboard Cite

Crop physiology is a broad subject and a comprehensive treatise of all its aspects is impossible, even in a whole volume dedicated to the subject. With a few exceptions, plant physiology, rather than crop physiology, is commonly the focus when physiological aspects of plant growth and development are reviewed in biological sciences. Plant and crop physiology are distinguishable by the manner in which one is almost purely basic and the other tends towards application of the science in crop management. Therefore, the objective of this review was to highlight crop production-oriented physiological research that has shaped our current knowledge and research activities in the past few decades, especially the latter part of the past century. Source-sink relationships, stress physiology, mineral nutrition and seed physiology were identified as the key aspects of crop physiology that influence crop production. Each of these aspects is addressed to identify its significance in crop performance and to highlight both the breakthroughs and gaps in our contemporary knowledge of crop physiology. There was no attempt to provide fundamental interpretations. The reader is referred to relevant appraisals of crop and plant physiology, to gain further insight into original data. Since the review is also meant to contribute to further education in crop production, views on the challenge of training future crop scientists are expressed in the final section.

show abstract

Section: Growth Regulationmentioning

confidence: 99%

Crop physiology: A perspective for southern Africa

Modi

Greenfield

2010

South African Journal of Plant and Soil

View full text Add to dashboard Cite

show abstract

“…At the same time, it should be noted that there are little-studied features of gibberellin regulation of germination of seeds and vegetative organs of plants containing as a reserve substance proteins, lipids, inulin and other compounds, but not starch. Synthetic substances retardants that have an antigibberellin mechanism of action are widely used to block the physiological action of gibberellins (Carvalho, At the same time, although retardants lead to significant changes in the ontogenesis of plants, features of their effects on the development of plants under skoto-and photomorphogenesis remain little known (Ramburan, Greenfield, 2007;Matysiak, Kaczmarek, 2013;Wang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effect of gibberellin and retardants on the germination of seeds with different types of reserve substances under the conditions of skoto- and photomorphogenesis

Poprotska¹,

Kuryata²,

Khodanitska³

et al. 2020

biologija

View full text Add to dashboard Cite

The influence of preparations of phytohormone gibberellin and antigibberellin–retardants tebuconazole and chlormequat chloride – on the germination of plant seeds with different types of reserve compounds in the light (photomorphogenesis) and in the dark (skotomorphogenesis) was studied. It was established that under the action of gibberellin, stimulation of the aboveground part and root system growth of maize, beans and pumpkin seedlings was more intensive in comparison with the control. This process was faster in the dark. The use of tebuconazole and chlormequat chloride significantly inhibited the process of germination both in the light and in the dark. At the same time, the coefficient of the use of reserve substances was maximal under the action of gibberellin, and minimum under the action of retardants, both under the conditions of skoto- and photomorphogenesis. The change in the growth characteristics and the coefficient of the use of reserve substances of bean seeds was accompanied by a decrease in the content of total nitrogen, indicating the use of reserve nitrogen-containing compounds in the processes of morphogenesis. The content of protein nitrogen in the control was lower under the conditions of skotomorphogenesis than in the photomorphic seedlings, and the opposite effect was noted for the actions of gibberellin and the retardant. In the later stages of germination, the largest reserve oil of pumpkin seed remained in cotyledonary leaves of photomorphic plants under the effects of chlormequat chloride, which clearly correlated with the least intense growth rates of seedlings in this variant, both in the light and darkness. Under conditions of skotomorphogenesis the growth stimulating effect of gibberellin significantly increased, and the light blocked the action of this phytohormone.

show abstract

“…Yield effects of PGRs have been shown to be year, staging, cultivar, and environment specific Smith 1992a, 1992b). Both positive (Rajala and Peltonen-Sainio 2002;Perrott et al 2018) and negative (Caldwell et al 1988;Simmons et al 1988;Ma and Smith 1991b;Ramburan and Greenfield 2007) effects have been demonstrated for different products in barley. Although the across site-year analysis for PGR effects on lodging was not significant, the variance associated with the interaction between site-year and PGR application was >10% and so lodging by site-years is reported below.…”

Section: Pgr Effectsmentioning

confidence: 99%

Effects of plant growth regulator applications on malting barley in western Canada

Tidemann

O’Donovan

Izydorczyk³

et al. 2020

Can. J. Plant Sci.

View full text Add to dashboard Cite

Malting barley is important in western Canada, yet many malting cultivars do not make malt quality, in part due to lodging. Lodging can decrease barley yield and quality thereby reducing the acceptability for malting. In other countries plant growth regulator applications are used to mitigate lodging. Chlormequat chloride (chlormequat), trinexapac-ethyl (trinexapac) and ethephon were tested at five locations over 3 years in western Canada for their ability to limit lodging, as well as their effects on yield, agronomic traits, and pre-malt quality characteristics. PGR applications occurred between GS 30-33 for chlormequat and trinexapac and GS 37-49 for ethephon. Seeding rates of 200, 300, and 400 seeds m-2 of CDC Copeland barley were used to increase the likelihood of lodging. Increased seeding rate decreased tillers per plant, height, days to maturity, kernel protein and kernel weight. Ethephon increased the number of tillers per plant, and decreased plant height, kernel plumpness and kernel weight. Trinexapac decreased plant height and kernel weight. Days to maturity was investigated across site-years with ethephon increasing maturity in 60% of comparisons. Trinexapac and chlormequat had limited effects on maturity. Lodging was investigated across site-years with trinexapac showing the largest number of lodging reductions and scale of reductions. Ethephon reduced lodging in 36% of comparisons, while chlormequat had inconsistent effects. None of the products affected yield, or grain protein. Plant growth regulators may not be the solution to lodging for CDC Copeland barley on the Canadian Prairies, however trinexapac shows the most promise of the products tested.

show abstract

Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied

Cited by 14 publications

References 14 publications

Crop physiology: A perspective for southern Africa

Crop physiology: A perspective for southern Africa

Effect of gibberellin and retardants on the germination of seeds with different types of reserve substances under the conditions of skoto- and photomorphogenesis

Effects of plant growth regulator applications on malting barley in western Canada

Contact Info

Product

Resources

About