Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions

Peony plants require temperate winter temperatures to break underground bud dormancy and allow shoot emergence and flowering in spring. This study assessed whether artificial chilling at 4 °C for 2–6 weeks could induce shoot emergence and flowering under subtropical conditions. It also assessed whet...

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Autores principales:	Krista C. Bogiatzis, Helen M. Wallace, Stephen J. Trueman
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	chilling dormancy flowering gibberellin <i>Paeonia</i> vernalization Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/0325cec675a54931ade8555e43afaf5d
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spelling	oai:doaj.org-article:0325cec675a54931ade8555e43afaf5d2021-11-25T17:47:29ZShoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions10.3390/horticulturae71104762311-7524https://doaj.org/article/0325cec675a54931ade8555e43afaf5d2021-11-01T00:00:00Zhttps://www.mdpi.com/2311-7524/7/11/476https://doaj.org/toc/2311-7524Peony plants require temperate winter temperatures to break underground bud dormancy and allow shoot emergence and flowering in spring. This study assessed whether artificial chilling at 4 °C for 2–6 weeks could induce shoot emergence and flowering under subtropical conditions. It also assessed whether pre-treatment at cool temperatures prior to chilling, or gibberellin application after chilling, promoted shoot emergence and flowering. Artificial chilling at 4 °C for 4 or 6 weeks promoted the greatest shoot emergence. Pre-treatment at cool temperatures did not affect shoot growth or flower bud production but it improved shoot emergence from plants also treated with gibberellin. Gibberellin more than doubled the number of shoots per plant without affecting shoot length. The optimal treatment combination for shoot emergence, growth and flower bud production was pre-treatment from 20 °C to 8 °C over an 8-day period in autumn, chilling at 4 °C for 6 weeks in early winter, and treatment with 250 mL of 100 mg/L GA<sub>3</sub>, before returning plants to subtropical winter conditions. This treatment combination provided medians of 3 (0–7) and 8 (0–31) flower buds per plant in the second and third years of production, respectively. Peony flowers can be produced in subtropical climates using artificial chilling and gibberellin, allowing out-of-season market supply.Krista C. BogiatzisHelen M. WallaceStephen J. TruemanMDPI AGarticlechillingdormancyfloweringgibberellin<i>Paeonia</i>vernalizationPlant cultureSB1-1110ENHorticulturae, Vol 7, Iss 476, p 476 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	chilling dormancy flowering gibberellin <i>Paeonia</i> vernalization Plant culture SB1-1110
spellingShingle	chilling dormancy flowering gibberellin <i>Paeonia</i> vernalization Plant culture SB1-1110 Krista C. Bogiatzis Helen M. Wallace Stephen J. Trueman Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
description	Peony plants require temperate winter temperatures to break underground bud dormancy and allow shoot emergence and flowering in spring. This study assessed whether artificial chilling at 4 °C for 2–6 weeks could induce shoot emergence and flowering under subtropical conditions. It also assessed whether pre-treatment at cool temperatures prior to chilling, or gibberellin application after chilling, promoted shoot emergence and flowering. Artificial chilling at 4 °C for 4 or 6 weeks promoted the greatest shoot emergence. Pre-treatment at cool temperatures did not affect shoot growth or flower bud production but it improved shoot emergence from plants also treated with gibberellin. Gibberellin more than doubled the number of shoots per plant without affecting shoot length. The optimal treatment combination for shoot emergence, growth and flower bud production was pre-treatment from 20 °C to 8 °C over an 8-day period in autumn, chilling at 4 °C for 6 weeks in early winter, and treatment with 250 mL of 100 mg/L GA<sub>3</sub>, before returning plants to subtropical winter conditions. This treatment combination provided medians of 3 (0–7) and 8 (0–31) flower buds per plant in the second and third years of production, respectively. Peony flowers can be produced in subtropical climates using artificial chilling and gibberellin, allowing out-of-season market supply.
format	article
author	Krista C. Bogiatzis Helen M. Wallace Stephen J. Trueman
author_facet	Krista C. Bogiatzis Helen M. Wallace Stephen J. Trueman
author_sort	Krista C. Bogiatzis
title	Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
title_short	Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
title_full	Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
title_fullStr	Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
title_full_unstemmed	Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
title_sort	shoot growth and flower bud production of peony plants under subtropical conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0325cec675a54931ade8555e43afaf5d
work_keys_str_mv	AT kristacbogiatzis shootgrowthandflowerbudproductionofpeonyplantsundersubtropicalconditions AT helenmwallace shootgrowthandflowerbudproductionofpeonyplantsundersubtropicalconditions AT stephenjtrueman shootgrowthandflowerbudproductionofpeonyplantsundersubtropicalconditions
_version_	1718411963027947520

Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions

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