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An experiment on Impatiens New Guinea for 11-12 year olds
Karlstad University, Faculty of Social and Life Sciences.
2008 (English)In: Journal of Biological Education, ISSN 0021-9266, Vol. 42, no 4, 177-179 p.Article in journal (Refereed) Published
Abstract [en]

The following experiment describes an easy experiment for children 11-12 years old, performed during spring in a compulsory school near Karlstad, Sweden. Four different ripe fruits were placed under flowering plants of LL (Impatiens hawkeri) on a table and with plastic bags around both plants and fruits for four days. Two of these fruits produce ethylene to a high degree in connection with ripening, two do not. For one of these high-grade ethylene-producing fruits, apple, the result was very clear. The plants under influence of apple shed many flowers and buds already the first day, due to stimulated senescence caused by ethylene. For the other ethylene-producing fruit, kiwi fruit, the result was clear but not over-explicit as for apple. The other two fruits, orange and lemon, caused flowers and buds to shed in the same proportion as the control plants. From the result a discussion could involve tips of how to stimulate ripening of unripe fruits e.g. by putting apples in the same fruit dish as unripe fruits. Not all unripe fruits, however, will respond to this treatment. Another consequence is not to put flowering plants near ethylene-producing fruits. The experiment is planned in a correct scientific way and thus stimulates discussion about how to design experiments. Other advantages with the experiment are: almost no materials are necessary except pot-plants and fruits which are easy to buy in a garden centre and a grocers shop, the experiment is cheap, it is easy to perform and it stimulates practical work

Place, publisher, year, edition, pages
2008. Vol. 42, no 4, 177-179 p.
Keyword [en]
Abscission, easy experiment, ethylene gas, ripe fruits, stimulate interest
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-16879DOI: 10.1080/00219266.2008.9656137OAI: oai:DiVA.org:kau-16879DiVA: diva2:590475
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2017-04-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
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