| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Epagri-Sede. |
|
Data corrente: |
31/01/2018 |
|
Data da última atualização: |
31/01/2018 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
ARRINGTON, M.; PASA, M. S.; EINHORN, T. C. |
|
Título: |
Postbloom Thinning Response of 'Bartlett' Pears to Abscisic Acid. |
|
Ano de publicação: |
2017 |
|
Fonte/Imprenta: |
HortScience, Alexandria, v. 52, n. 12, p. 1765-1771, 2017. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Postbloom thinning of ?Bartlett? pears (Pyrus communis L.) is required to produce fruit of commercially acceptable size. In the Pacific Northwestern United States, low temperatures during early stages of pear fruitlet development often limit the efficacy of commercial thinning compounds. Hand thinning, therefore, remains the standard crop load management practice. Chemical thinning protocols are necessary to reduce the cost and dependence on hand labor. The plant hormone abscisic acid (ABA) was evaluated over multiple years in several ?Bartlett? pear orchards. ABA was applied to whole canopies at variable rates (50?500 ppm) when fruit diameter was generally between 10 and 12 mm. In three of four trials, ABA thinned in a dose-dependent manner. The relative degree of thinning for a given dose, however, was inconsistent among trials. Trees treated with ABA had a higher proportion of blank and single-fruited spurs than the control. Net photosynthesis (Pn) of single leaves was reduced 75% to 90% within one day of ABA application but gradually returned to ?80% of control levels within 7 days and fully recovered by ?14 days. Slightly greater and longer lasting Pn inhibition occurred with increasing ABA dose. Fruit weight and return bloom generally increased with increasing ABA rate. Fruit quality, when measured, was unaffected by ABA treatments. Inconsistent thinning response with ABA may be attributed to environmental factors, biological factors, or both. |
|
Palavras-Chave: |
crop load management; European pear; fruit set; photosynthesis; Pyrus communis. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
|
|
|
Marc: |
LEADER 02057naa a2200205 a 4500
001 1127019
005 2018-01-31
008 2017 bl uuuu u00u1 u #d
100 1 $aARRINGTON, M.
245 $aPostbloom Thinning Response of 'Bartlett' Pears to Abscisic Acid.$h[electronic resource]
260 $c2017
520 $aPostbloom thinning of ?Bartlett? pears (Pyrus communis L.) is required to produce fruit of commercially acceptable size. In the Pacific Northwestern United States, low temperatures during early stages of pear fruitlet development often limit the efficacy of commercial thinning compounds. Hand thinning, therefore, remains the standard crop load management practice. Chemical thinning protocols are necessary to reduce the cost and dependence on hand labor. The plant hormone abscisic acid (ABA) was evaluated over multiple years in several ?Bartlett? pear orchards. ABA was applied to whole canopies at variable rates (50?500 ppm) when fruit diameter was generally between 10 and 12 mm. In three of four trials, ABA thinned in a dose-dependent manner. The relative degree of thinning for a given dose, however, was inconsistent among trials. Trees treated with ABA had a higher proportion of blank and single-fruited spurs than the control. Net photosynthesis (Pn) of single leaves was reduced 75% to 90% within one day of ABA application but gradually returned to ?80% of control levels within 7 days and fully recovered by ?14 days. Slightly greater and longer lasting Pn inhibition occurred with increasing ABA dose. Fruit weight and return bloom generally increased with increasing ABA rate. Fruit quality, when measured, was unaffected by ABA treatments. Inconsistent thinning response with ABA may be attributed to environmental factors, biological factors, or both.
653 $acrop load management
653 $aEuropean pear
653 $afruit set
653 $aphotosynthesis
653 $aPyrus communis
700 1 $aPASA, M. S.
700 1 $aEINHORN, T. C.
773 $tHortScience, Alexandria$gv. 52, n. 12, p. 1765-1771, 2017.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Epagri-Sede (Epagri-Sede) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
|
Voltar
|
|
|
| Registros recuperados : 4 | |
| 4. |  | EINHORN, T.; ARRINGTON, M.; WANG, Y.; LIMA, A. P. F.; PASA, M. S. Evaluation of ABA and AVG to manage fruit set and crop load of 'd'Anjou', 'Bartlett' and 'Comice' pear. In: INTERNATIONAL PEAR SYMPOSIUM ISHS, 12., 2014, Leuven. Program and Abstracts... Bélgica: ISHS, 2014.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Epagri-Sede. |
|   |
| Registros recuperados : 4 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
