New Zealand Journal of Crop and Horticultural Science abstracts
Display life of Gentiana flowers is cultivar specific and influenced
by sucrose, gibberellin, fluoride, and postharvest storage
J. R. Eason
E. R. Morgan
A. C. Mullan
G. K. Burge
New Zealand Institute for Crop and Food
Research Limited
Food Industry Science Centre
Batchelar Road
Private Bag 11 600
Palmerston North, New Zealand
email: easonj@crop.cri.nz
Abstract Gentiana are developing into a significant
New Zealand export cut flower crop. The current investigation was undertaken
to describe the postharvest characteristics of the cultivars grown in New
Zealand, thereby establishing a baseline for selection of new cultivars with
superior postharvest performance. Three cultivars were used in the current
postharvest investigation, G. triflora ‘Nasu No-Hakuryo’ (a white flowered
cultivar), and two blue flowered cultivars, G. triflora ‘Late Blue’
and G. triflora ‘Ashiro No-Ake’. The postharvest quality of these
Gentiana cut flowers is influenced by a number of factors including
harvest maturity, pulsing solutions, cultivar, fluoride, and postharvest storage.
In particular, pulsing solutions that contain sucrose (2-5%) or gibberellic
acid (GA3, 10 µM) extended the vase life of ‘Late
Blue’ and enhanced the quality (blue coloration of apical buds) of ‘Ashiro
No-Ake’, but did not improve the postharvest quality of ‘Nasu No-Hakuryo’.
The effectiveness of these solutions is reduced when stems are not subjected
to extended periods of postharvest storage, or when stems are harvested at
an advanced stage of maturity.
Keywords gentian; Gentiana triflora; postharvest;
sucrose; gibberellic acid; fluoride
H03108; Received 28 November 2003; accepted 8 April 2004; Online publication
date 15 June 2004
New Zealand Journal of Crop and Horticultural Science, 2004, Vol. 32:
217-226
0014-0671/04/3202-0217 $7.00 © The Royal Society of New Zealand
2004
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