NDLI: Artemisinin production and precursor ratio in full grown Artemisia annua L. plants subjected to external stress

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Planta : Volume 237, Issue 3, March 2013

Planta : Volume 237, Issue 2, February 2013

Planta : Volume 237, Issue 1, January 2013

Artemisinin production and precursor ratio in full grown Artemisia annua L. plants subjected to external stress

Content Provider	Springer Nature Link
Author	Kjær, Anders Verstappen, Francel Bouwmeester, Harro Ivarsen, Elise Fretté, Xavier Christensen, Lars P. Grevsen, Kai Jensen, Martin
Copyright Year	2012
Abstract	The concentration of the lifesaving antimalarial compound artemisinin (AN) in cultivated Artemisia annua (A. annua) plants is relatively low, and thus research in improving the content is important. In the present study, external stress was applied to adult plants of A. annua and the effect was examined on the concentrations of AN and its immediate precursors in leaves, and these concentrations were related to densities and sizes of the glandular trichomes (GT). Plants were stress treated weekly five times by sandblasting or spraying with salicylic acid, chitosan oligosaccharide, H2O2, and NaCl solutions. Contents of AN-related compounds (AN-c) were analysed in leaf samples from an upper and a lower position of the plants, and GT were quantified and measured. In lower leaves, several stress treatments had significant negative effects on concentrations of AN-c, whereas the ratios between compounds showed an increased conversion to AN. In the upper leaves, no changes were observed compared to controls. Linear relations were found between the concentrations of metabolites and the density of GT in both upper and lower leaves, and size of GT in lower leaves. Results suggested that older and younger leaves may respond differently to applied stress. A part of the plants were infected by powdery mildew, and this caused significantly different compositions of the AN-c, compared to uninfected plants. In conclusion, changes in concentrations of AN-c seemed largely to be related to changes in GT densities and sizes.
Starting Page	955
Ending Page	966
Page Count	12
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	237
Issue Number	4
e-ISSN	14322048
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-11-24
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Artemisinin Artemisia annua Leaf age Stress Trichome area Trichome density Plant Sciences Agriculture Ecology Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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