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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Variation of photosynthesis and carbohydrate levels induced by ethephon and water deficit on the ripening stage of sugarcane

Texto completo
Autor(es):
Roberto, Guilherme Garcia [1] ; Cunha, Camila [2] ; Gabriel Sales, Cristina Rodrigues [1] ; Silveira, Neidiquele Maria [1] ; Ribeiro, Rafael Vasconcelos [3] ; Machado, Eduardo Caruso [1] ; Magalhaes Andrade Lagoa, Ana Maria [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Ctr P&D Ecofisiol & Biofis, Inst Agron IAC, Lab Fisiol Vegetal Coaracy M Franco, BR-13020902 Campinas, SP - Brazil
[2] Univ Estadual Campinas UNICAMP, Lab Genoma Func, Inst Biol, BR-13083862 Campinas, SP - Brazil
[3] Univ Estadual Campinas, IB, Dept Biol Vegetal, BR-13083862 Campinas, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Bragantia; v. 74, n. 4, p. 379-386, OCT-DEC 2015.
Citações Web of Science: 3
Resumo

An important index for the ethanol industry is the sucrose yield in sugarcane, which is affected by plant ability to accumulate sucrose during ripening. Despite the known efficiency of treatments such as water restriction and the application of regulators to stimulate the sucrose storage in culms, little is known about the physiological responses of the plant that lead to ripening. In this context, the aim of this study was to evaluate the physiological responses of sugarcane to different ripening treatments. Two varieties, IACSP95-5000, with high yield, and IACSP94-2094, with moderate yield were subjected to water deficit or application of chemical regulator (ethephon 480 g ha(-1)) and both treatments associated. Growth, accumulation of carbohydrates in leaves and culms were measured. It can be concluded that the effects of ethephon on sugarcane are genotype-dependent. Ethephon stimulates sucrose accumulation in the culm and the photosynthate supply by the source in the responsive variety (IACSP95-5000). Such effects are not associated with growth restriction. In relation to the drought combined with the application of ethephon, the responsive variety shows increased sucrose content in culm at the same level as when ethephon is applied alone, hence treatments have no additive effects on sugarcane ripening. (AU)

Processo FAPESP: 12/13920-8 - Análise transcriptômica do efeito do hormônio etileno na maturação em cana-de-açúcar
Beneficiário:Camila Pinto da Cunha
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 12/19167-0 - Envolvimento do óxido nítrico nas respostas fisiológicas em plantas de cana-de-açúcar submetidas a déficit hídrico
Beneficiário:Neidiquele Maria Silveira
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 08/57495-3 - Integrando características fisiológicas, morfológicas e anatômicas para entender o rendimento diferencial de sacarose em genótipos de cana-de-açúcar
Beneficiário:Eduardo Caruso Machado
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático