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Avaliação da Senescência Foliar de Plantas de Jatropha curcas L. Submetidas a Doses de Benzilaminopurina

DOI: http://dx.doi.org/10.12971/2179-5959.v03n01a01

http://www.prp.ueg.br/revista/index.php/agrotecnologia/index 

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Ana T. V. da C. e Silva1, Tárik G. Neves1, Marcelo R. Zucchi2, Ednaldo C. Rocha2 & Fábio S. Matos2

 

Resumo: Jatropha curcas L. é uma planta de grande valor econômico, sobretudo por suas sementes constituírem matéria-prima para a produção de óleo e obtenção do biodiesel. O pinhão manso é uma planta caducifólia - as folhas senescem e caem, em parte ou totalmente, quando termina a estação chuvosa ou durante a estação fria. Nestes períodos, a planta permanece em repouso até o começo da primavera ou da estação chuvosa. O presente trabalho objetivou retardar o processo de senescência foliar através da aplicação exógena de benzilaminopurina. O experimento foi conduzido no campo experimental da Universidade Estadual de Goiás, unidade de Ipameri, Goiás. Após análise do solo, foi realizada a adubação e a correção do pH de acordo com recomendações técnicas. As plantas foram submetidas a quatro tratamentos: 0 mg L-1 de benzilaminopurina (T1), 100 mg L-1 de benzilaminopurina (T2), 300 mg L-1 de benzilaminopurina (T3) e 500 mg L-1 de benzilaminopurina (T4) distribuídas em três aplicações quinzenais (15 de abril, 30 de abril e 15 de maio). O experimento foi montado seguindo o delineamento em blocos casualizados com cinco repetições. A parcela experimental correspondeu a duas plantas. A aplicação foliar de benzilaminopurina não retarda a senescência foliar em plantas de Jatropha curcas L. As baixas temperaturas são determinantes para o desencadeamento do processo de senescência foliar.

Palavras-chave: citocinina, abscisão, crescimento

 

Abstract: Jatropha curcas L. is a plant of great economic value, especially for their seeds constitute the raw material for the production of oil and obtaining biodiesel. Jatropha is a deciduous plant - the senescent leaves and fall, in part or completely, when the rainy season ends or during the cold season. During these periods, the plant remains at rest until the beginning of spring or the rainy season. This study aimed to slow the process of leaf senescence by exogenous application of benzyladenine. The study was conducted in the experimental field of the State University of Goias, Ipameri unit, Ipameri, Goiás After soil testing, fertilization was performed and the pH correction according to technical recommendations. The plants were subjected to four treatments: 0 mg L-1 benzylaminopurine (T1), 100 mg L-1 benzylaminopurine (T2), 300 mg L-1 benzylaminopurine (T3) and 500 mg L-1 benzylaminopurine (T4 ) distributed in three applications weekly (15 April 30 April and 15 May). The experiment was carried out following the randomized block design with five replications. The experimental plot corresponded to two plants. The foliar application of benzyladenine not retards senescence in plants of Jatropha curcas L. The low temperatures are crucial for triggering the process of leaf senescence.

Key words: biodiesel, sustainability, Jatrophacurcas

 

1 Graduando em Agronomia, Universidade Estadual de Goiás(UEG).
2 Engenheiro Agrônomo, Professor doutor, Universidade Estadual de Goiás (UEG), Rodovia: GO 330, km 241, Anel Viário s/n, Ipameri-GO, CEP: 75780-000, e-mail: fabio.agronomia@hotmail.com

 

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