Are plant growth retardants a strategy to decrease lodging and increase yield of sunflower?

Carvalho, Marcia Eugenia Amaral; Castro, Paulo Roberto de Camargo e; Ferraz Junior, Marcos Vinicius de Castro; Mendes, Ana Carolina Cabrera Machado

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dc.creator	Carvalho, Marcia Eugenia Amaral
dc.creator	Castro, Paulo Roberto de Camargo e
dc.creator	Ferraz Junior, Marcos Vinicius de Castro
dc.creator	Mendes, Ana Carolina Cabrera Machado
dc.date	2016-05-10
dc.date.accessioned	2022-03-21T20:07:49Z
dc.date.available	2022-03-21T20:07:49Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/1286
dc.identifier	10.14295/cs.v7i1.1286
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/77783
dc.description	One of the major disadvantages of sunflower cultivation is the increased plant height, making it prone to the lodging. The use of plant growth retardants can be an alternative strategy to reduce plant height; however, these compounds may affect productivity. The aim of this study was to evaluate the effects of plant growth retardants on sunflower development and yield. Four treatments were studied: 1- control; 2- gibberellic acid (GA) 10 mg L−1; 3- trinexapac-ethyl (TE) 5 mL L−1, and 4- maleic hidrazide (MH) 8 mL L−1. TE and MH decreased plant height (16.9 and 35.9%, respectively); however, only TE positively influenced capitulim diameter and dry mass (46.7 and 311%, when compared to control) at 60 days after planting (DAP). At 81 DAP, dry mass of capitulum did not differ among control and TE-treated plants. On the other hand, MH impaired diameter and dry mass of capitulum (92.9 and 74.7%, respectively). It can be concluded that the application of TE is a potential strategy to decrease lodging probability without affecting sunflower yield. Furthermore, although MH negatively affected sunflower development, its use on the crop cannot be excluded since other doses, frequencies and moment of application can be studied.	en-US
dc.description	One of the major disadvantages of sunflower cultivation is the increased plant height, making it prone to the lodging. The use of plant growth retardants can be an alternative strategy to reduce plant height; however, these compounds may affect productivity. The aim of this study was to evaluate the effects of plant growth retardants on sunflower development and yield. Four treatments were studied: 1- control; 2- gibberellic acid (GA) 10 mg L−1; 3- trinexapac-ethyl (TE) 5 mL L−1, and 4- maleic hidrazide (MH) 8 mL L−1. TE and MH decreased plant height (16.9 and 35.9%, respectively); however, only TE positively influenced capitulim diameter and dry mass (46.7 and 311%, when compared to control) at 60 days after planting (DAP). At 81 DAP, dry mass of capitulum did not differ among control and TE-treated plants. On the other hand, MH impaired diameter and dry mass of capitulum (92.9 and 74.7%, respectively). It can be concluded that the application of TE is a potential strategy to decrease lodging probability without affecting sunflower yield. Furthermore, although MH negatively affected sunflower development, its use on the crop cannot be excluded since other doses, frequencies and moment of application can be studied.	pt-BR
dc.format	application/pdf
dc.format	application/msword
dc.language	eng
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1286/391
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1286/660
dc.source	Comunicata Scientiae; Vol. 7 No. 1 (2016); 154-159	en-US
dc.source	Comunicata Scientiae; v. 7 n. 1 (2016); 154-159	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.subject	Helianthus annuus	en-US
dc.subject	maleic hidrazide	en-US
dc.subject	trinexapac-ethyl	en-US
dc.subject	Helianthus annuus	pt-BR
dc.subject	maleic hidrazide	pt-BR
dc.subject	trinexapac-ethyl	pt-BR
dc.title	Are plant growth retardants a strategy to decrease lodging and increase yield of sunflower?	en-US
dc.title	Are plant growth retardants a strategy to decrease lodging and increase yield of sunflower?	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion