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Variation in constitutive and induced chemistry in the needles, bark and roots of young Pinus radiata trees

Citation

Nantongo, JS and Potts, BM and Davies, NW and Fitzgerald, H and Rodemann, T and O'Reilly-Wapstra, J, Variation in constitutive and induced chemistry in the needles, bark and roots of young Pinus radiata trees, Trees, 36 pp. 341-359. ISSN 1432-2285 (2021) [Refereed Article]

Copyright Statement

The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021

DOI: doi:10.1007/s00468-021-02209-5

Abstract

The capacity of trees to cope with pests and pathogens depends in part on the variation of constitutive and induced chemical defences within the plant. Here we examined the constitutive and induced variation of primary (sugars and fatty acids) and secondary (mono-, sesqui- and di- terpenoids as well as volatile phenolics) metabolites in the needles, bark and, for the first time, roots of 2-year old Pinus radiata. A total of 81 compounds were examined. The plant parts differed significantly in constitutive levels of individual sugars, fatty acids, mono-, sesqui- and di- terpenoids as well as volatile phenolics. Overall, the bark had more compounds and a higher amount of most secondary compounds and the levels of compounds in the roots differed from that of the needles and bark. For example, glucose was the dominant sugar in the needles and bark whereas fructose dominated in the roots. Of the fully identified secondary compounds, monoterpenoids dominated in all plant parts but with different qualitative patterns. Following methyl jasmonate and bark stripping treatments, a marked reduction in sugars but weaker changes in secondary compounds were detected in the needles and bark. Responses in the roots were minor but the few that were detected were mostly in response to the bark stripping treatment. Changes in correlations among chemicals within plant parts and between the same compound across the different plant parts were also detected after stress treatments. Overall, results showed that the constitutive composition in the roots differs from that of the bark and needles in P. radiata and inducibility is stronger in the primary than secondary metabolites and differs between plant parts. This detailed assessment of Pinus radiata chemistry in the needles, bark and roots, including the compounds that respond to simulated biotic stress will potentially facilitate the identification of related chemical defence traits.

Item Details

Item Type:Refereed Article
Keywords:plant defence, primary chemistry, roots, bark stripping, methyl jasmonate
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forestry management and environment
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Softwood plantations
UTAS Author:Nantongo, JS (Mrs Judith Nantongo)
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Davies, NW (Associate Professor Noel Davies)
UTAS Author:Fitzgerald, H (Mr Hugh Fitzgerald)
UTAS Author:Rodemann, T (Dr Thomas Rodemann)
UTAS Author:O'Reilly-Wapstra, J (Professor Julianne O'Reilly-Wapstra)
ID Code:147182
Year Published:2021
Funding Support:Australian Research Council (LP140100602)
Web of Science® Times Cited:2
Deposited By:Office of the School of Natural Sciences
Deposited On:2021-10-18
Last Modified:2022-05-04
Downloads:0

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