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Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems
RESEARCH ARTICLE

The Christmas tree project: comparing the effects of five treatments on the health of cut Christmas trees (Pinus radiata, Pinaceae)

Olyvea Akres A , Isabella Cavallaro A , Cynthia Cheng A , Madison Dixon A , Darcy Goddard A , Tamara Hofbauer A , Sidney Mahr A , Taylor Mason A , Lulu Miskin A , Chloe Morgan A , Eleanor Nettleton A , Amelia Purseglove A , Bella Rosenberg A , Lucia Salgado A , Jasmin Sardi A , Emily Scarlis A , Sophie Snyman A , Isabella Spagnardi A , Oona Swinson-Dulhunty A , Lilla Szentmariay A , Nikki Zimmerman A , Angela T. Moles B D and Julia Cooke B C
+ Author Affiliations
- Author Affiliations

A Kambala, 794 New South Head Road, Rose Bay, NSW 2029, Australia.

B Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Australia, NSW 2052, Australia.

C Department of Earth, Environment and Ecosystems, The Open University, Milton Keynes, MK7 6AA, United Kingdom.

D Corresponding author. Email: a.moles@unsw.edu.au

Australian Journal of Botany 64(1) 15-19 https://doi.org/10.1071/BT14343
Submitted: 16 December 2014  Accepted: 16 November 2015   Published: 5 February 2016

Abstract

Our experiment tested which of five treatments kept Christmas trees (Pinus radiata) healthy for longest. The five different treatments were submerging the cut ends of pine branches in water (control), freshly boiled water (to potentially dissolve sap in cut stems), energy drink (to provide sugars), beer (to provide sugars and kill germs) or spraying the needles with hairspray (to reduce water loss). We measured how much light energy was converted to chemical energy by the needles, thus recording their health. The treatment that maintained the highest level of photosynthetic health was the hairspray, with an average of 90% of original needle health after 27 days. Branches in freshly boiled water and control treatments both retained ~68% of their original photosynthetic health. Branches in both beer and energy-drink treatments declined to about a third of their original needle health. In conclusion, we recommend spraying cut Pinus radiata Christmas trees with hairspray.

Additional keywords: Australasia, beer, energy drink, hairspray, Kambala, pine-needle health, pocket-PAM, Scientists in Schools program.


References

Bolhàr-Nordenkampf HR, Öquist G (1993) Chlorophyll fluorescence as a tool in photosynthesis research. In ‘Photosynthesis and production in a changing environment: a field and laboratory manual’. pp. 193–206. (Springer: Dordrecht)

Chastagner GA, Hinesley E, Riley K (2007) Effectiveness of I–V watering devices in maintaining postharvest freshness and quality of cut Christmas trees. Postharvest Biology and Technology 43, 178–181.
Effectiveness of I–V watering devices in maintaining postharvest freshness and quality of cut Christmas trees.Crossref | GoogleScholarGoogle Scholar |

Elhindi KM (2012) Effects of postharvest pretreatments and preservative solutions on vase life longevity and flower quality of sweet pea (Lathyrus odoratus L.). Photosynthetica 50, 371–379.
Effects of postharvest pretreatments and preservative solutions on vase life longevity and flower quality of sweet pea (Lathyrus odoratus L.).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhtFKis7jO&md5=e0ccad0d5f6f44a1bccbff453f964029CAS |

Greenbeanteam (2009) ‘Saint Michael School / STM_F09_W11.’ Available at http://www.plantingscience.org/index.php?module=pagesetter&func=viewpub&tid=2&pid=2574 [Verified 16 December 2015]

Heiligmann RB, Brown JH (2005) Postharvest needle retention and moisture characteristics of Canaan fir compared with four other Christmas tree species. Northern Journal of Applied Forestry 22, 268–274.

Koelling MR, White DP (1974) How to make your Christmas tree last longer. Horticulture 52, 30–32.

MacDonald MT, Lada RR, Dorais M, Pepin S (2011) Endogenous and exogenous ethylene induces needle abscission and cellulase activity in post-harvest balsam fir (Abies balsamea L.). Trees 25, 947–952.
Endogenous and exogenous ethylene induces needle abscission and cellulase activity in post-harvest balsam fir (Abies balsamea L.).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXhtFOqu7rN&md5=0a586e7211470bbc61fd3316969e3fa1CAS |

MacDonald MT, Lada RR, Dorais M, Pepin S (2012) Influence of humidity and temperature on postharvest needle abscission in balsam fir in the presence and absence of exogenous ethylene. HortScience 47, 1328–1332.

Meyer MH (2013) ‘Keeping cut flowers and flowering plants.’ Available at http://www.extension.umn.edu/garden/yard-garden/flowers/keeping-cut-flowers-and-flowering-plants/index.html [Verified 16 December 2013]

Murchie EH, Lawson T (2013) Chlorophyll fluorescence analysis: a guide to good practice and understanding some new applications. Journal of Experimental Botany 64, 3983–3998.

MythBusters (2006) ‘Season 4, episode 27: holiday special.’ First aired 6 December 2006.

Neumaier D Bausbach E Simon M Tisch M Winkelmann T 2009 Effect of time of harvest, water quality and cut flower food on vase life of cyclamen cut flowers. IX International Symposium on Postharvest Quality of Ornamental Plants 847 269 274

Pinto ACR Mello SC Jacomino AP Minami K Barbosa JC 2009 Postharvest characteristics and treatments to overcome latex exuded from cut flowers of Lotus. VI International Symposium on New Floricultural Crops 813 671 677

Thiagarajan A, Lada R, Pepin S, Forney C, Desjardins Y, Dorais M (2012) Characterization of phytohormonal and postharvest senescence responses of balsam fir (Abies balsamea (L.) Mill.) exposed to short-term low temperature. Trees 26, 1545–1553.
Characterization of phytohormonal and postharvest senescence responses of balsam fir (Abies balsamea (L.) Mill.) exposed to short-term low temperature.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhtlOju7%2FI&md5=75630a43f7d5368ff09e796bdb901da1CAS |

van Meeteren U, van Gelder A, van Leperen W (2005) Effect of growth conditions on post harvest rehydration ability of cut chrysanthemum flowers. In ‘Proceedings of the VIIIth international symposium on postharvest physiology of ornamental plants’. (Eds N Marissen, WG VanDoorn, U VanMeeteren) pp. 287–295. (International Society Horticultural Science: Leuven, Belgium)