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

Krista C Bogiatzis; Helen M Wallace; Stephen J Trueman

doi:10.3390/horticulturae7110476

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

Journal article

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Peer reviewed

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

Krista C Bogiatzis, Helen M Wallace and Stephen J Trueman

Horticulturae, Vol.7(11), pp.1-11

2021

DOI: https://doi.org/10.3390/horticulturae7110476

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Abstract

chilling

dormancy

flowering

gibberellin

Paeonia

vernalization

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 GA3, 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.

Details

Title: Shoot Growth and Flower Bud Production of Peony Plants under Subtropical Conditions
Authors: Krista C Bogiatzis (Author) - University of the Sunshine Coast
Helen M Wallace (Author) - Griffith University
Stephen J Trueman (Author) - Griffith University
Publication details: Horticulturae, Vol.7(11), pp.1-11
Publisher: MDPI AG
Date published: 2021
DOI: 10.3390/horticulturae7110476
ISSN: 2311-7524
Copyright note: Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
Language: English
Record Identifier: 99585407502621
Output Type: Journal article