Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges
The aim of the present work was to evaluate the effects of auxins and gibberellins when applied at pre-harvest to the fruit development, and to the ripening and natural fall of the fruit, in 'Pêra' oranges. Trees of Citrus sinensis Osbeck cv. Pêra, 5 years old, were utilized. The treatment...
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2004-08-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400003 |
| _version_ | 1811299592437760000 |
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| author | Isolina Maria Leite de Almeida João Domingos Rodrigues Elizabeth Orika Ono |
| author_facet | Isolina Maria Leite de Almeida João Domingos Rodrigues Elizabeth Orika Ono |
| author_sort | Isolina Maria Leite de Almeida |
| collection | DOAJ |
| description | The aim of the present work was to evaluate the effects of auxins and gibberellins when applied at pre-harvest to the fruit development, and to the ripening and natural fall of the fruit, in 'Pêra' oranges. Trees of Citrus sinensis Osbeck cv. Pêra, 5 years old, were utilized. The treatments applied were: GA3 + 2,4-D 12.5mg L-1 of each; GA3 + 2,4-D 25mg L-1 ; GA3 + 2,4-D 37.5mg L-1; GA3 + NAA 12.5mg L-1; GA3 + NAA 25mg L-1; GA3 + NAA 37.5mg L-1; NAA + 2,4-D 12.5mg L-1; NAA + 2,4-D 25mg L-1; NAA + 2,4-D 37.5mg L-1; and water (control). The treatments were applied 3 times, at intervals of 45 days. The variables evaluated were: rate of natural fall (%), fruit length and diameter (mm), and fresh fruit weight (g). None of the treatments promoved alterations in the development of the fruits, but they did reduce the natural fall rate, when compared to control, up to 78.05%, inhibiting the fruits' abscision as much as 3 months.<br>O trabalho objetivou avaliar os efeitos de auxinas e giberelinas, combinados e aplicados em pré-colheita no desenvolvimento e na taxa de queda natural de frutos de laranjeira 'Pêra'. Foram utilizadas árvores de laranjeira (Citrus sinensis Osbeck) cultivar Pêra com 5 anos de idade. Os tratamentos foram: GA3 + 2,4-D 12,5mg L-1 de cada; GA3 + 2,4-D 25mg L-1; GA3 + 2,4-D 37,5mg L-1; GA3 + NAA 12,5mg L-1; GA3 + NAA 25mg L-1; GA3 + NAA 37,5mg L-1; NAA + 2,4-D 12,5mg L-1; NAA + 2,4-D 25mg L-1; NAA + 2,4-D 37,5mg L-1 e testemunha (água). Durante todo o período experimental foram realizadas três aplicações a intervalos de 45 dias. As variáveis avaliadas foram: Taxa de queda natural dos frutos (%), comprimento (mm), diâmetro (mm) e massa fresca dos frutos (g). Nenhum dos tratamentos proporcionaram alterações no desenvolvimento final dos frutos, mas reduziram a taxa de queda natural em comparação com a testemunha em até 78,05%, inibindo a abscisão dos frutos em até três meses. |
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| format | Article |
| id | doaj.art-115dac486b2443e483789297834f729f |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-04-13T06:39:04Z |
| publishDate | 2004-08-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-115dac486b2443e483789297834f729f2022-12-22T02:57:48ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242004-08-0147451152010.1590/S1516-89132004000400003Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' orangesIsolina Maria Leite de AlmeidaJoão Domingos RodriguesElizabeth Orika OnoThe aim of the present work was to evaluate the effects of auxins and gibberellins when applied at pre-harvest to the fruit development, and to the ripening and natural fall of the fruit, in 'Pêra' oranges. Trees of Citrus sinensis Osbeck cv. Pêra, 5 years old, were utilized. The treatments applied were: GA3 + 2,4-D 12.5mg L-1 of each; GA3 + 2,4-D 25mg L-1 ; GA3 + 2,4-D 37.5mg L-1; GA3 + NAA 12.5mg L-1; GA3 + NAA 25mg L-1; GA3 + NAA 37.5mg L-1; NAA + 2,4-D 12.5mg L-1; NAA + 2,4-D 25mg L-1; NAA + 2,4-D 37.5mg L-1; and water (control). The treatments were applied 3 times, at intervals of 45 days. The variables evaluated were: rate of natural fall (%), fruit length and diameter (mm), and fresh fruit weight (g). None of the treatments promoved alterations in the development of the fruits, but they did reduce the natural fall rate, when compared to control, up to 78.05%, inhibiting the fruits' abscision as much as 3 months.<br>O trabalho objetivou avaliar os efeitos de auxinas e giberelinas, combinados e aplicados em pré-colheita no desenvolvimento e na taxa de queda natural de frutos de laranjeira 'Pêra'. Foram utilizadas árvores de laranjeira (Citrus sinensis Osbeck) cultivar Pêra com 5 anos de idade. Os tratamentos foram: GA3 + 2,4-D 12,5mg L-1 de cada; GA3 + 2,4-D 25mg L-1; GA3 + 2,4-D 37,5mg L-1; GA3 + NAA 12,5mg L-1; GA3 + NAA 25mg L-1; GA3 + NAA 37,5mg L-1; NAA + 2,4-D 12,5mg L-1; NAA + 2,4-D 25mg L-1; NAA + 2,4-D 37,5mg L-1 e testemunha (água). Durante todo o período experimental foram realizadas três aplicações a intervalos de 45 dias. As variáveis avaliadas foram: Taxa de queda natural dos frutos (%), comprimento (mm), diâmetro (mm) e massa fresca dos frutos (g). Nenhum dos tratamentos proporcionaram alterações no desenvolvimento final dos frutos, mas reduziram a taxa de queda natural em comparação com a testemunha em até 78,05%, inibindo a abscisão dos frutos em até três meses.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400003Auxinsgibberellinsfruit dropdevelopment |
| spellingShingle | Isolina Maria Leite de Almeida João Domingos Rodrigues Elizabeth Orika Ono Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges Brazilian Archives of Biology and Technology Auxins gibberellins fruit drop development |
| title | Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges |
| title_full | Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges |
| title_fullStr | Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges |
| title_full_unstemmed | Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges |
| title_short | Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges |
| title_sort | application of plant growth regulators at pre harvest for fruit development of pera oranges |
| topic | Auxins gibberellins fruit drop development |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400003 |
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