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dc.contributor.authorAmada, Gaku
dc.contributor.authorKobayashi, Keito
dc.contributor.authorIzuno, Ayako
dc.contributor.authorMukai, Mana
dc.contributor.authorOstertag, Rebecca
dc.contributor.authorKitayama, Kanehiro
dc.contributor.authorOnoda, Yusuke
dc.contributor.alternative小林, 慧人
dc.contributor.alternative北山, 兼弘
dc.contributor.alternative小野田, 雄介
dc.date.accessioned2020-09-28T05:34:47Z-
dc.date.available2020-09-28T05:34:47Z-
dc.date.issued2020-02-14
dc.identifier.issn0305-7364
dc.identifier.urihttp://hdl.handle.net/2433/254685-
dc.description.abstractBackground and Aims: Plants inhabiting arid environments tend to have leaf trichomes, but their adaptive significance remains unclear. Leaf trichomes are known to play a role in plant defence against herbivores, including gall makers. Because gall formation can increase water loss partly through increased surface area, we tested the novel hypothesis that leaf trichomes could contribute to avoiding extra water stress by impeding gall formation, which would have adaptive advantages in arid environments. Methods: We focused on Metrosideros polymorpha, an endemic tree species in the Hawaiian Islands, whose leaves often suffer from galls formed by specialist insects, Hawaiian psyllids (Pariaconus spp.). There is large variation in the amount of leaf trichomes (0–40 % of leaf mass) in M. polymorpha. Three gall types are found on the island of Hawaii: the largest is the ‘cone’ type, followed by ‘flat’ and ‘pit’ types. We conducted laboratory experiments to quantify the extent to which gall formation is associated with leaf water relations. We also conducted a field census of 1779 individuals from 48 populations across the entire range of habitats of M. polymorpha on the island of Hawaii to evaluate associations between gall formation (presence and abundance) and the amount of leaf trichomes. Key Results: Our laboratory experiment showed that leaf minimum conductance was significantly higher in leaves with a greater number of cone- or flat-type galls but not pit-type galls. Our field census suggested that the amount of trichomes was negatively associated with probabilities of the presence of cone- or flat-type galls but not pit-type galls, irrespective of environmental factors. Conclusion: Our results suggest that leaf trichomes in M. polymorpha can contribute to the avoidance of extra water stress through interactions with some gall-making species, and potentially increase the fitness of plants under arid conditions.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherOxford University Press (OUP)
dc.rightsThis is a pre-copyedited, author-produced version of an article accepted for publication in Annals of botany following peer review. The version of record Gaku Amada, Keito Kobayashi, Ayako Izuno, Mana Mukai, Rebecca Ostertag, Kanehiro Kitayama, Yusuke Onoda, Leaf trichomes in Metrosideros polymorpha can contribute to avoiding extra water stress by impeding gall formation, Annals of Botany, Volume 125, Issue 3, 14 February 2020, Pages 533–542, is available online at: https://doi.org/10.1093/aob/mcz196.
dc.rightsThe full-text file will be made open to the public on 14 February 2021 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
dc.rightsThis is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
dc.subjectLeaf trichome
dc.subjectwater limitation
dc.subjectplant
dc.subjectinsect interaction
dc.subjectdefence
dc.subjectgall
dc.subjectHawaiian psyllid
dc.subjectPariaconus
dc.subjectMetrosideros polymorpha
dc.titleLeaf trichomes in Metrosideros polymorpha can contribute to avoiding extra water stress by impeding gall formation
dc.type.niitypeJournal Article
dc.identifier.jtitleAnnals of botany
dc.identifier.volume125
dc.identifier.issue3
dc.identifier.spage533
dc.identifier.epage542
dc.relation.doi10.1093/aob/mcz196
dc.textversionauthor
dc.addressGraduate School of Agriculture, Kyoto University
dc.addressGraduate School of Agriculture, Kyoto University
dc.addressDepartment of Forest Molecular Genetics and Biotechnology, Forestry and Forest Products Research Institute, Tsukuba
dc.addressGraduate School of Agriculture, Kyoto University
dc.addressDepartment of Biology, University of Hawai‘i at Hilo
dc.addressGraduate School of Agriculture, Kyoto University
dc.addressGraduate School of Agriculture, Kyoto University
dc.identifier.pmid31784739
dc.identifier.kakenJP17J04193 / 15KK0255
Appears in Collections:Journal Articles

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