Oxygen Consumption by Phalaenopsis Plantlets and Chrysanthemum Cuttings as a Function of Temperature and Time: Model Structure Validation

Lieven Van De Vondel,Frank Devlieghere,Annelies Christiaens,Marie-Christine Van Labeke,An Vermeulen,Peter Ragaert

doi:10.3390/agronomy11020237

Lieven Van De Vondel, Frank Devlieghere + Show 4 more

Open Access

https://doi.org/10.3390/agronomy11020237

Copy DOI

Journal: Agronomy	Publication Date: Jan 28, 2021
Citations: 2	License type: CC BY 4.0

Affiliation: Ghent University

Abstract

Phalaenopsis spp. and Chrysanthemum are ornamentals with an important economic value. Currently, quality loss during storage and transport of plantlets and cuttings is a limiting factor for spreading the workload, broadening the export range, and the use of slower but more environmentally friendly transport. In the agro-food sector, equilibrium modified atmosphere packaging has enhanced the shelf-life of minimally processed produce. The required properties for an equilibrium modified atmosphere packaging system can be estimated from the respiration rate of the packaged commodity under specified atmospheric composition and storage temperature. In this work, a model structure is validated to estimate the respiration rate as a function of oxygen concentration and temperature for Phalaenopsis and Chrysanthemum. The oxygen concentration as a function of time was monitored in a closed system for different storage temperatures. The models show a good fit to the data. The model coefficients were dependent on the plant species and characteristics. The resulting formulae can be used to estimate the oxygen consumption rate of the produce under a range of oxygen concentrations and a temperature range from 15 °C to 32 °C for Phalaenopsis and from 2 °C to 14 °C for Chrysanthemum. The oxygen concentrations for which the formulae are valid depend on the storage temperature and plant species. The models can be used to estimate a dynamic oxygen consumption rate profile during storage and transport.

Highlights

Phalaenopsis is a genus of orchid species native to Tropical and Subtropical Asia and
When the oxygen level dropped below 1.5% (Phalaenopsis and cv. B (CB)) or below 1% (CC), measurements were not taken into account because of the nearly anaerobic conditions inside the bottles, which could influence the respiration
The respiration rate of both Phalaenopsis and Chrysanthemum is higher at a higher temperature and is positively correlated with the oxygen concentration

Summary

Introduction

Phalaenopsis is a genus of orchid species native to Tropical and Subtropical Asia andNorth-Eastern Australia [1]. Phalaenopsis is a genus of orchid species native to Tropical and Subtropical Asia and. 20th century heralded the beginning of mass production [2]. The genus Phalaenopsis is currently the most important flowering pot plant traded by the Dutch auctions with a turnover of 460 million EUR in 2019 [3]. Chrysanthemum is a plant genus containing several species of ornamental importance. In the late 17th century, Asian Chrysanthemum species were imported into Europe via The Netherlands [4]. Chrysanthemum is sold as a cut flower or as a potted plant. When looking at the statistics of the sales of cut flowers on Floraholland, Chrysanthemum had the second-highest turnover (after Rosa) and was the third most sold plant in units (after Rosa and Tulipa) in 2019 [3]

Objectives

Methods

Results

Discussion

Conclusion