Different endophyte communities colonize buds of sprouts compared with mature trees of mountain birch recovered from moth herbivory
Koivusaari, Pirjo; Pohjanen, Johanna; Wäli, Piippa R.; Ahonen, Saija H.K.; Saravesi, Karita; Markkola, Anna Mari; Haapala, Kaisa; Suokas, Marko; Koskimäki, Janne J.; Tejesvi, Mysore V.; Pirttilä, Anna Maria (2018-02-22)
Pirjo Koivusaari, Johanna Pohjanen, Piippa R Wäli, Saija H K Ahonen, Karita Saravesi, Anna Mari Markkola, Kaisa Haapala, Marko Suokas, Janne J Koskimäki, Mysore V Tejesvi, Anna Maria Pirttilä; Different endophyte communities colonize buds of sprouts compared with mature trees of mountain birch recovered from moth herbivory, Tree Physiology, Volume 38, Issue 9, 1 September 2018, Pages 1437–1444, https://doi.org/10.1093/treephys/tpy012
© The Author(s) 2018. Published by Oxford University Press. All rights reserved. This is a pre-copyedited, author-produced version of an article accepted for publication in Tree Physiology following peer review. The version of record Pirjo Koivusaari, Johanna Pohjanen, Piippa R Wäli, Saija H K Ahonen, Karita Saravesi, Anna Mari Markkola, Kaisa Haapala, Marko Suokas, Janne J Koskimäki, Mysore V Tejesvi, Anna Maria Pirttilä; Different endophyte communities colonize buds of sprouts compared with mature trees of mountain birch recovered from moth herbivory, Tree Physiology, Volume 38, Issue 9, 1 September 2018, Pages 1437–1444, is available online at: https://doi.org/10.1093/treephys/tpy012.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe201901232797
Tiivistelmä
Abstract
Plant meristems were previously thought to be sterile. Today, meristem-associated shoot endophytes are mainly reported as contaminants from plant tissue cultures, the number of observed species being very low. However, the few strains characterized have the capacity for infecting host cells and affecting plant growth and development. Here we studied the communities of endophytic bacteria in the buds of mountain birch (Betula pubescens ssp. czerepanovii (N. I. Orlova) Hämet-Ahti) exposed to winter moth (Operophtera brumata L.) herbivory, to identify differences between sprouts and branches of mature birch trees. Mountain birch of the high subarctic is cyclically exposed to winter moth and produces sprouts to generate new trees as a survival mechanism. The majority (54%) of operational taxonomic units belonged to Xanthomonadaceae and Pseudomonales of Proteobacteria. Most of the observed species were classified as Xanthomonas (28%). Sprout buds had the highest diversity, containing approximately three times more species, and significantly more (43%) Pseudomonas species than the mature trees (14%). Our results demonstrate that endophytic communities of buds are richer than previously thought. We suggest that the meristem-associated endophytes should be studied further for a possible role in sprouting and aiding regeneration of trees.
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