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Can methyl jasmonate treatment of conifer seedlings be used as a tool to stop height growth in nursery forest trees?

Fedderwitz, Frauke and Björklund, Niklas and Anngren, Ronny and Lindstrom, Anders and Nordlander, Göran (2020). Can methyl jasmonate treatment of conifer seedlings be used as a tool to stop height growth in nursery forest trees? New Forests. 51 , 379-394
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Abstract

A plant's induced defense system can be triggered by the application of the plant hormone methyl jasmonate (MeJA), and recent research suggest that MeJA treatment may become a tool for protection of conifer seedlings against insect herbivory (e.g. by the pine weevil Hylobius abietis). A side-effect of MeJA application is temporarily reduced height growth. This has generally been considered as negative, but in forest tree nurseries this could instead be beneficial since it is commonly desired to stop the growth of nursery seedlings in late summer. Artificially longer dark periods (long nights/short days) are widely used in high-latitude nurseries to terminate height growth and induce freezing tolerance. However, long night treatment requires specialized nursery equipment and are labor intensive. Therefore alternatives are sought after. We compared long-night and MeJA treatments by following the growth of Norway spruce (Picea abies) seedlings throughout one season. The regulatory effect of MeJA on height growth was similar if not even better than that of long nights, i.e. it was terminated faster. However, MeJA treatment also reduced root growth and delayed the development of freezing tolerance. MeJA may therefore not replace long-night treatments, but it could facilitate a more flexible application of long nights by gaining a longer time interval during which this treatment can be used without risking the seedlings growing too large.

Authors/Creators:Fedderwitz, Frauke and Björklund, Niklas and Anngren, Ronny and Lindstrom, Anders and Nordlander, Göran
Title:Can methyl jasmonate treatment of conifer seedlings be used as a tool to stop height growth in nursery forest trees?
Year of publishing :2020
Volume:51
Page range:379-394
Number of Pages:16
Publisher:Springer
ISSN:0169-4286
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Diameter, Forest regeneration, Freezing tolerance, Long night treatment, Picea abies, Root growth, Short day treatment
URN:NBN:urn:nbn:se:slu:epsilon-p-105176
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105176
Additional ID:
Type of IDID
DOI10.1007/s11056-019-09737-6
Web of Science (WoS)000522649500001
ID Code:16902
Faculty:S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:06 May 2020 11:48
Metadata Last Modified:06 May 2020 11:48

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