Division of Biotechnology and Plant Health
PROTECT: Effects of defense priming on Norway spruce needle microbiome and pest resistance
End: dec 2024
Start: mar 2022
In correlation with our Research Council of Norway funded project on the effects of Norway spruce defense priming on the root microbiome and resistance, we will also analyse the effects of spruce defense priming and soil microbiota on the spruce needle microbiome and resistance. This project is funded by SNS - Nordic Forest Research.
Project participants
Vaida Sirgedaitė-Šėžienė Adriana Puentes Taina Pennanen
| Status | Concluded |
| Start - end date | 01.03.2022 - 31.12.2024 |
| Project manager | Melissa Magerøy |
| Division | Division of Biotechnology and Plant Health |
| Department | Molecular Plant Biology |
| Partners | Viken Skog |
| Total budget | 998000 |
| Funding source | Nordic Forest Research |
The primary aims of this project are:
1) Determine how defense priming affects the ability of spruce plants to form mutualistic relationships with microbiota and the composition of these microbial communities.
2) Determine how defense priming and microbiota composition affect photosynthetic ability and photosynthetic metabolites.
3) Determine how defense priming and microbiota composition affect spruce production of defensive metabolites.
4) Determine how defense priming and microbiota composition affect spruce plants resistance to pest and pathogens.
Publications in the project
Authors
Melissa MagerøyAbstract
No abstract has been registered
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Melissa MagerøyAbstract
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Carl Gunnar Fossdal Paal Krokene Jorunn Elisabeth Olsen George Richard Strimbeck Marcos Viejo Igor A. Yakovlev Melissa MagerøyAbstract
No abstract has been registered
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Ngan Bao HuynhAbstract
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Ngan Bao Huynh Paal Krokene Jorunn Elisabeth Olsen Taina Pennanen Adriana Puentes Vaida Sirgedaitė-Šėžienė Vytautas Čėsna Ieva Čėsnienė Melissa MagerøyAbstract
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Melissa MagerøyAbstract
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Melissa MagerøyAbstract
Epigenetic modification is an important mechanism that allows plants to rapidly adapt to changes in environment. This modification can provide long-term increased tolerance and resistance to abiotic and biotic stress and may even be transmittable to progeny. Knowledge on how epigenetic memory is established, maintained, triggered, and transmitted in plants with different evolutionary and life histories is important for understanding and utilizing epigenetic adaptation in plant protection. In this symposium, we welcome talks from those that provide insight into the molecular mechanism underlying epigenetic memory to those that present the practical aspects of implementing epigenetic adaptation in the field.
Authors
Melissa MagerøyAbstract
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Defense priming, the sensitization of inducible defenses, has been extensively studied in annual angiosperms. However, we are just beginning to explore defense priming in woody, long-lived plants. The natural compound methyl jasmonate (MeJA) has been used for over 20 years to study spruce inducible defenses. Recently, it was discovered that MeJA not only directly induces defense, but also primes defense responses in spruce. Metabolite and transcriptional analyses of mature trees treated with MeJA and subsequently wounded showed that while terpenes accumulate at the wound site in a primed manner, terpene biosynthesis genes are directly induced by MeJA. Pathogen resistance (PR) genes, on the other hand, are primed. Sequencing of miRNAs suggests that miRNAs have a regulatory role in MeJA-induced defenses in spruce. Additionally, a detailed transcriptional time course of 2- year-old spruce treated with MeJA indicated that the RNA-directed DNA methylation (RdDM) pathway is involved in the establishment and maintenance of primed defenses. When comparing mechanisms of defense priming in spruce to those in Arabidopsis, it seems that many mechanisms are conserved. However, some aspects, such as jasmonic acid-salicylic acid crosstalk, may be different. Identifying these differences and how they affect forest species is important for practical application of defense priming in forest management.
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