Postharvest physiology and volatile production by flowers of Ptilotus nobilis

Able, Amanda J., Smyth, Heather and Joyce, Daryl (2014) Postharvest physiology and volatile production by flowers of Ptilotus nobilis. Postharvest Biology and Technology, 88 61-71. doi:10.1016/j.postharvbio.2013.10.002


Author Able, Amanda J.
Smyth, Heather
Joyce, Daryl
Title Postharvest physiology and volatile production by flowers of Ptilotus nobilis
Formatted title
Postharvest physiology and volatile production by flowers of Ptilotus nobilis
Journal name Postharvest Biology and Technology   Check publisher's open access policy
ISSN 0925-5214
1873-2356
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.postharvbio.2013.10.002
Volume 88
Start page 61
End page 71
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 070605 Post Harvest Horticultural Technologies (incl. Transportation and Storage)
Formatted abstract
Ptilotus nobilis (Lindl.) F. Muell. has potential in the floriculture industries as a cut flower crop. Ethylene production and respiration rates, fresh weight changes and volatile scent production from cut inflorescences of P. nobilis cultivars Passion (dark pink flowers) and Purity (white-green flowers) were measured during vase life. Inflorescence weight loss was significant (P<0.001) during vase life with wilting and colour loss being the primary reasons for loss of vase life. Inflorescences ready for the cut market stored and at 22°C had vase lives of >12d. Ethylene production by inflorescences was low to negligible. Treatment with silverthiosulphate (STS) and ethylene had no effects on vase life. Evidently, ethylene did not play a role in determining the postharvest longevity of cut P. nobilis flowers. Respiration rates of inflorescences were high at harvest (>700mg CO2kg-1 FWh-1) and declined gradually thereafter during vase life. Total volatile emissions followed a similar pattern. For Passion, respiration rates of immature florets were significantly greater (P=0.02) than florets from other developmental stages while the calyx produced the most CO2. For Purity, respiration rates of florets of different maturities did not differ and the reproductive tissue produced the most CO2. Only fully opened mature florets with their stigma and anthers revealed, emitted significant quantities of volatiles (P<0.001) and primarily from the calyx tissue for both cultivars. The individual volatiles differed somewhat for the two cultivars. However, both produced significant quantities of benzaldehyde, 3,5-dimethoxytoluene and benzyl alcohol. These compounds have previously been associated with desirable floral scent. 
Keyword Cut flower
Floral scent
Floret maturity
Respiration
Vase life
Volatiles
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID RIRDC PRJ-002435
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Queensland Alliance for Agriculture and Food Innovation
Official 2014 Collection
 
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Created: Fri, 29 Nov 2013, 07:21:15 EST by System User on behalf of Qld Alliance for Agriculture and Food Innovation