Article
Forestry
Nickolas E. Kichas, Amy M. Trowbridge, Kenneth F. Raffa, Shealyn C. Malone, Sharon M. Hood, Richard G. Everett, David B. McWethy, Gregory T. Pederson
Summary: The study found no trade-off between tree growth and defense in whitebark and lodgepole pine, with differences in resin ducts and resin chemistry between the two species. Based on constitutive terpene profiles, mountain pine beetles are more likely to enter lodgepole pine but more likely to successfully elicit mass attacks in whitebark pine. Overstory competition may influence tree defenses and alter bark beetle-conifer interactions as host and nonhost species migrate in response to changing climate.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Xinye Wang, Zhixin Wang, Guoliang Zhu, Lan Jiang, Weiyan Zhang, Yiyi Huang, Zhanren Cong, Yi-Lei Zhao, Jian-He Xu, Tom Hsiang, Lixin Zhang, Qi Chen, Xueting Liu
Summary: A key site has been identified that controls the conversion between bicyclic and polycyclic terpene skeletons. Mutation on this site can redirect the competing reactions and produce previously unknown terpenes.
CHEMICAL COMMUNICATIONS
(2022)
Article
Plant Sciences
Chandra H. McAllister, Catherine I. Cullingham, Rhiannon M. Peery, Michael Mbenoun, Eden McPeak, Nicolas Feau, Richard C. Hamelin, Tod D. Ramsfield, Colin L. Myrholm, Janice E. K. Cooke
Summary: This study investigates the coevolutionary relationship between Cronartium harknessii and Pinus spp. It examines the genetic structure and virulence of C. harknessii associated with lodgepole pine, jack pine, and their hybrids. The study also improves the assessment and diagnosis of infection in these hosts. The results show a shared genetic structure between the fungus and host species, supporting a coevolutionary relationship. Additionally, the study finds differential responses of the host species to different fungal lineages.
Article
Forestry
Yini Zhang, Xianyin Ding, Qifu Luan, Jingmin Jiang, Shu Diao
Summary: In this study, CYP720B candidate genes were identified and classified in slash pine and loblolly pine based on genome and transcriptome data. Most of the genes showed higher expression levels in roots and stems, which corresponded with the detection of resin components, indicating the importance of roots and stems in resin biosynthesis.
Article
Biochemistry & Molecular Biology
Nhu Ngoc Quynh Vo, Yuhta Nomura, Kiyomi Kinugasa, Hiroshi Takagi, Shunji Takahashi
Summary: This study reports five drimenol synthases (DMSs) from marine bacteria and reveals the biosynthesis of drimane sesquiterpenes in bacteria. Protein structure modeling and biochemical analysis shed light on the catalytic mechanism of AsDMS and further elucidate the diversity of structure and function of terpene synthases.
ACS CHEMICAL BIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Li-Ting Ma, Chang-Hsin Wang, Chong-Yao Hon, Yi-Ru Lee, Fang-Hua Chu
Summary: Chamaecyparis formosensis is an endemic and precious coniferous species of Taiwan, known for its high abundance of specialized metabolites with anti-fungal and antibacterial bioactivities, which contribute to plant defense against pathogens. This species contains unique diterpenoids, including cadinene, ferruginol, and derivatives of isoabienol, which are essential for understanding diterpenoid metabolism in Cupressaceae.
Article
Forestry
Javier E. Mercado, Robert T. Walker, Scott Franklin, Shannon L. Kay, Beatriz Ortiz-Santana, S. Karen Gomez
Summary: Traumatic resin ducts (TRDs) in Douglas-fir are formed in response to fungal inoculation, while lodgepole pine rarely forms TRDs. Douglas-fir produces a higher density of TRDs and larger TRDs compared to lodgepole pine, indicating better resistance against bark beetle fungal colonization.
Article
Plant Sciences
Nadir Erbilgin, Leila Zanganeh, Jennifer G. Klutsch, Shih-hsuan Chen, Shiyang Zhao, Guncha Ishangulyyeva, Stephen J. Burr, Monica Gaylord, Richard Hofstetter, Ken Keefover-Ring, Kenneth F. Raffa, Thomas Kolb
Summary: The research showed that only trees that were both root-trenched and attacked by bark beetles depleted carbohydrates and died during the first year of attacks. Live trees contained higher carbohydrates than dying trees, but levels of diterpenes did not vary between the two groups. This suggests that reallocation of carbohydrates to diterpenes during early stages of beetle attacks is limited in drought-stricken trees, and combination of biotic and abiotic stress leads to tree death.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Plant Sciences
Enrica Alicandri, Stefano Covino, Bartolomeo Sebastiani, Anna Rita Paolacci, Maurizio Badiani, Francesco Manti, Carmelo Peter Bonsignore, Agostino Sorgona, Mario Ciaffi
Summary: The analysis of diterpenoid composition in different organs of Calabrian pine showed that diterpene resin acids were the most abundant compounds, with species and tissue specificity. Transcript profiling confirmed differential expression across tissues and was consistent with diterpenoid profiles.
Article
Plant Sciences
Emmanuelle Pelletier, Guillaume de Lafontaine
Summary: Research has shown that marginal populations of jack pine in Canada have adapted to uncommon and unpredictable wildfire regimes by reducing the opening temperature of their cones. This adaptation allows for steady seed viability and successful regeneration during fire-free intervals. In contrast, core populations have a more constant, but higher, opening temperature for their cones and experience a decline in seed viability over time.
AMERICAN JOURNAL OF BOTANY
(2023)
Article
Plant Sciences
Guadalupe Diaz-Carranza, Agustina Rosa Andres-Hernandez, Susana Guillen, Sombra Patricia Rivas-Arancibia, Adriana Montoya Esquivel
Summary: In La Malinche National Park, the wood-stripping (ocoteo) of pine species, especially P. montezumae, is mainly conducted at mid and low altitudes. The intensity of wood-stripping is higher in trees with larger diameter, height, and age. All wood-stripped trees have significantly more traumatic resin ducts.
BOTANICAL SCIENCES
(2022)
Article
Plant Sciences
Justin G. A. Whitehill, Hannah Henderson, Mathias Schuetz, Oleksandr Skyba, Macaire Man Saint Yuen, John King, A. Lacey Samuels, Shawn D. Mansfield, Jorg Bohlmann
PLANT CELL AND ENVIRONMENT
(2016)
Article
Plant Sciences
Jose M. Celedon, Macaire M. S. Yuen, Angela Chiang, Hannah Henderson, Karen E. Reid, Jorg Bohlmann
Article
Plant Sciences
Melissa H. Mageroy, Sharon Jancsik, Macaire Man Saint Yuen, Michael Fischer, Stephen G. Withers, Christian Paetz, Bernd Schneider, John Mackay, Joerg Bohlmann
Article
Biochemistry & Molecular Biology
Sandra Irmisch, Seohyun Jo, Christopher R. Roach, Sharon Jancsik, Macaire Man Saint Yuen, Lufiani L. Madilao, Mark O'Neil-Johnson, Russel Williams, Stephen G. Withers, Joerg Bohlmann
Article
Forestry
Tal J. Shalev, Macaire M. S. Yuen, Andreas Gesell, Agnes Yuen, John H. Russell, Jorg Bohlmann
TREE GENETICS & GENOMES
(2018)
Article
Plant Sciences
Justin G. A. Whitehill, Macaire M. S. Yuen, Hannah Henderson, Lina Madilao, Kristina Kshatriya, Jennifer Bryan, Barry Jaquish, Jorg Bohlmann
Article
Plant Sciences
Sandra Irmisch, Henriette Ruebsam, Sharon Jancsik, Macaire Man St Yuen, Lufiani L. Madilao, Joerg Bohlmann
Article
Plant Sciences
Sandra Irmisch, Sharon Jancsik, Macaire M. S. Yuen, Lufiani L. Madilao, Jorg Bohlmann
Article
Plant Sciences
Judith K. Booth, Macaire M. S. Yuen, Sharon Jancsik, Lufiani L. Madilao, Jonathan E. Page, Jorg Bohlmann
Article
Plant Sciences
Sandra Irmisch, Sharon Jancsik, Macaire Man Saint Yuen, Lufiani L. Madilao, Joerg Bohlmann
Article
Genetics & Heredity
Kristina K. Gagalova, Justin G. A. Whitehill, Luka Culibrk, Diana Lin, Veronique Levesque-Tremblay, Christopher Keeling, Lauren Coombe, Macaire M. S. Yuen, Inanc Birol, Jorg Bohlmann, Steven J. M. Jones
Summary: The true weevil family Curculionidae includes many agricultural and forest pests, with the white pine weevil a major pest in North American spruce and pine forests. Research has identified a substantial expansion of the weevil nuclear genome and observed an endosymbiont belonging to a parasitic group of Wolbachia species. These findings provide insights into the genetic characteristics and symbiotic relationships within this insect species.
G3-GENES GENOMES GENETICS
(2022)
Article
Evolutionary Biology
Omnia Gamal El-Dien, Tal J. Shalev, Macaire M. S. Yuen, Rod Stirling, Lori D. Daniels, Jesse W. Breinholt, Leandro G. Neves, Matias Kirst, Lise Van der Merwe, Alvin D. Yanchuk, Carol Ritland, John H. Russell, Joerg Bohlmann
Summary: The study conducted genetic analysis on Western redcedar using sequence capture genotyping, demonstrating that genomic-based analysis outperformed traditional pedigree analysis in terms of genetic gain and diversity estimation. This provides improved breeding efficiency for the species.
EVOLUTIONARY APPLICATIONS
(2022)
Article
Plant Sciences
Kristina K. Gagalova, Rene L. Warren, Lauren Coombe, Johnathan Wong, Ka Ming Nip, Macaire Man Saint Yuen, Justin G. A. Whitehill, Jose M. Celedon, Carol Ritland, Greg A. Taylor, Dean Cheng, Patrick Plettner, S. Austin Hammond, Hamid Mohamadi, Yongjun Zhao, Richard A. Moore, Andrew J. Mungall, Brian Boyle, Jerome Laroche, Joan Cottrell, John J. Mackay, Manuel Lamothe, Sebastien Gerardi, Nathalie Isabel, Nathalie Pavy, Steven J. M. Jones, Joerg Bohlmann, Jean Bousquet, Inanc Birol
Summary: This study compares the genomes of four different North American spruces and finds that their genome structures are similar, but rapidly evolving genomes indicate signs of divergent evolution, related to environmental adaptation and stress response.
Article
Biochemistry & Molecular Biology
Tal J. Shalev, Omnia Gamal El-Dien, Macaire M. S. Yuen, Shu Shengqiang, Shaun D. Jackman, Rene L. Warren, Lauren Coombe, Lise van der Merwe, Ada Stewart, Lori B. Boston, Christopher Plott, Jerry Jenkins, Guifen He, Juying Yan, Mi Yan, Jie Guo, Jesse W. Breinholt, Leandro G. Neves, Jane Grimwood, Loren H. Rieseberg, Jeremy Schmutz, Inanc Birol, Matias Kirst, Alvin D. Yanchuk, Carol Ritland, John H. Russell, Joerg Bohlmann
Summary: This study assembled the genome of western redcedar and found it to be genetically depauperate, yet capable of responding to natural and artificial selection. The genome assembly, one of the most complete for a conifer species, provides insights into the genetic characteristics of this ecologically and economically important tree.
Article
Plant Sciences
Justin G. A. Whitehill, Macaire M. S. Yuen, Angela Chiang, Carol E. Ritland, Joerg Bohlmann
Summary: Stone cells are a specialized, highly lignified cell type found in both angiosperms and gymnosperms. In conifers, they play a major role in defense against stem feeding insects. To investigate the molecular mechanisms of stone cell formation, researchers developed cell-type-specific transcriptomes and visualized the deposition of cellulose, xylan, and lignin associated with stone cell development. They found differentially expressed genes and identified transcriptional regulators with potential roles in secondary cell wall formation.