Amido e açúcares solúveis totais em pós-colheita de inflorescências de bastão-de-imperador

Drucylla Guerra Mattos,Patrícia Duarte De Oliveira Paiva,Eduardo Valério De Barros Vilas Boas,Lucas Ferreira Rodrigues,Heloisa Helena De Siqueira Elias,Rafael Carvalho Do Lago

doi:10.14295/oh.v24i4.1205

Drucylla Guerra Mattos, Patrícia Duarte De Oliveira Paiva + Show 4 more

Open Access

https://doi.org/10.14295/oh.v24i4.1205

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Journal: Ornamental Horticulture	Publication Date: Nov 21, 2018
Citations: 3	License type: cc-by

Affiliation: Universidade Federal de Lavras

Abstract

Floral opening stage during harvest and use of postharvest techniques, such as inflorescence coating with carnauba wax, may influence quality maintenance for commercialization. The aim was to evaluate the carbohydrate content of torch ginger inflorescences harvested at two different opening stages and treated with different concentrations of carnauba wax. The inflorescences were harvested with semi-open (basal bracts beginning their expansion process) and open bracts (fully expanded basal bracts and opening of the smaller bracts on interior of the inflorescence) and received the application of carnauba wax at concentrations of 0.75%; 1.5% or 3.0%, in addition to a control treatment, without wax application. After the treatment, the floral stems were maintained at 16 and 21 oC for 20 days. During the storage period, five bracts samples (external and internal bracts separately - in open inflorescences, external and internal bracts together - in semi-open inflorescences) were carried out every three days for evaluation of total soluble sugars and starch content. Contents of total soluble sugars and starch differed between the different types of bracts collected and throughout the storage period evaluated, and could indicate a remobilization of reserves. The concentration of 3.0% carnauba waxinduced higher total soluble sugar content. However, this content does not affect the longevity of torch ginger at the two evaluated floral opening stages.

Highlights

Torch ginger belongs to the genus Etlingera and, due to its exotic characteristics and beauty, has become one of the tropical ornamental plants with the greatest commercialization potential, the information about this tropical plant is still restricted (LOGES et al, 2008)
Starch and total soluble sugar content in torch ginger postharvest and VAN MEETEREN, 2003, COSTA and FINGER, 2016; SALES et al, 2018) and water absorption; this phenomenon is dependent on reserve mobilization, as demonstrated in Tweedia caerulea flowers, in which an increase in sugars concentrations induces decrease on osmotic potential
In floral stems storaged at a temperature of 16 oC, the external bracts collected from open inflorescences showed a higher content of total soluble sugars on the third day of storage, after which there was a decline

Summary

Introduction

Torch ginger belongs to the genus Etlingera and, due to its exotic characteristics and beauty, has become one of the tropical ornamental plants with the greatest commercialization potential, the information about this tropical plant is still restricted (LOGES et al, 2008). Starch and total soluble sugar content in torch ginger postharvest and VAN MEETEREN, 2003, COSTA and FINGER, 2016; SALES et al, 2018) and water absorption; this phenomenon is dependent on reserve mobilization, as demonstrated in Tweedia caerulea flowers, in which an increase in sugars concentrations induces decrease on osmotic potential. This contribut to water influx that will maintain the pressure potential, an aspect that is maybe involved in cell expansion and floral opening (ICHIMURA et al, 2013)

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Conclusion