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Evidence of simultaneous occurrence of tylosis formation and fungal interaction in a late Cenozoic angiosperm from the eastern Himalaya
Khan, Mahasin Ali1; Bera, Meghma1; Spicer, Robert A.; Spicer, Teresa E. V.; Bera, Subir1
2018
Source PublicationREVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
Volume259Issue:xPages:171-184
Abstract

Information on whether tyloses in fossil angiospermic plants form specifically in response to infestation with pathogenic fungi has been lacking so far, and thus the evolutionary history of tylosis formation as a physical restraint strategy against the advancing fungi remains unresolved. Our study addresses this knowledge lacuna. Carbonized woods were recovered from the upper part of the Siwalik succession (Kimin Formation: late Pliocene to early Pleistocene) of Arunachal Pradesh, eastern Himalaya. Samples from different portions of the wood remains were prepared by using standard thin sectioning techniques and studied under transmitted light compound and scanning electron microscopes. The Plio-Pleistocene wood remains are attributed to Gmelina arborea Roxb. (Lamiaceae) as Gmelina siwalika Khan, Bera M et Bera S, sp. nov. Numerous well-preserved tyloses were found mainly in the central heartwood region of the fossil wood. Rare fungal remains indicative of early-stage colonization are characterized by septate fungal hyphae extending through the vascular ray system within the secondary xylem, and fungal spores. As tyloses are present in large numbers and formed before the spread of fungal remains, they served as an effective physical restraint to the spread of the fungi. We conclude that tylosis formation contributed to an antagonistic relationship between pathogenic fungi and Gmelina plant in Neogene paleoecosystems of the eastern Himalaya. This report also demonstrates that the development of this histological protrusion has been a significant process in woody plants since Cenozoic. (C) 2018 Elsevier B.V. All rights reserved.

KeywordNeogene Siwalik Forests Fossil Wood Conifer Suberin Evolutionary Occlusions Anatomy Eocene Plants Xylem
Subject AreaPlant Sciences ; Paleontology
DOI10.1016/j.revpalbo.2018.10.004
Indexed BySCI
Language英语
WOS IDWOS:000453622000016
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11255
Collection其他
Affiliation1.Sidho Kanho Birsha Univ, Dept Bot, Ranchi Rd, Purulia 723104, India
2.Univ Calcutta, Dept Bot, Ctr Adv Study, 35 BC Rd, Kolkata 700019, India
3.Spicer, Robert A.] Open Univ, Sch Environm Earth & Ecosyst Sci, Milton Keynes MK7 6AA, Bucks, England
4.Spicer, Robert A.] Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
5.Spicer, Teresa E. V.] Chinese Acad Sci, Inst Bot, 20 Nanxincun, Beijing 100093, Peoples R China
Recommended Citation
GB/T 7714
Khan, Mahasin Ali,Bera, Meghma,Spicer, Robert A.,et al. Evidence of simultaneous occurrence of tylosis formation and fungal interaction in a late Cenozoic angiosperm from the eastern Himalaya[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2018,259(x):171-184.
APA Khan, Mahasin Ali,Bera, Meghma,Spicer, Robert A.,Spicer, Teresa E. V.,&Bera, Subir.(2018).Evidence of simultaneous occurrence of tylosis formation and fungal interaction in a late Cenozoic angiosperm from the eastern Himalaya.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,259(x),171-184.
MLA Khan, Mahasin Ali,et al."Evidence of simultaneous occurrence of tylosis formation and fungal interaction in a late Cenozoic angiosperm from the eastern Himalaya".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 259.x(2018):171-184.
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