Fusarium equiseti is associated with the wilt and dieback of Aquilaria malaccensis in Northeast India

Shailesh Pandey; R. Raja Rishi; R. S.C. Jayaraj; Krishna Giri; Rajesh Kumar; Amit Pandey; Ranjana Juwantha; Sheeba Madaan; Maneesh S. Bhandari

doi:10.1111/efp.12489

Fusarium equiseti is associated with the wilt and dieback of Aquilaria malaccensis in Northeast India

Shailesh Pandey, R. Raja Rishi, R. S.C. Jayaraj, Krishna Giri, Rajesh Kumar, Amit Pandey, Ranjana Juwantha, Sheeba Madaan, Maneesh S. Bhandari

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Aquilaria malaccensis, categorized by IUCN as globally vulnerable, is in high demand in the Middle East and Asian markets for its unique resinous agarwood. In August 2015, symptoms of dieback were observed on A. malaccensis trees planted in the Medicinal and Aromatic Plant Garden, Panbari, Golaghat of the Assam Forest Department. The entire crowns of 70 trees showed complete leaf loss and severe dieback. Rotting at the collar region and of roots was also observed. Isolation from the infected roots consistently yielded Fusarium equiseti identified following standard laboratory procedures and analysis of the internal transcribed spacer (ITS) sequence of the ribosomal DNA. Symptoms of wilt, dieback and root rot were observed on 5-month-old Aquilaria seedlings 25 days after inoculation with the isolated fungus. This paper is the first report of F. equiseti causing wilt and dieback of A. malaccensis.

Original language	English
Article number	e12489
Journal	Forest Pathology
Volume	49
Issue number	2
DOIs	https://doi.org/10.1111/efp.12489
State	Published - Apr 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 Blackwell Verlag GmbH

Funding

We thank the forest officials of Social Forestry Division, Golaghat, and Eastern Wildlife Division, Bokakhat of Assam Forest Department, for their help in the collection of samples from the diseased trees. We would like to extend our gratitude to NCMR, Pune, for ITS sequencing. The financial support by the Indian Council of Forestry Research and Education, Dehradun, is grate‐ fully acknowledged. We thank the forest officials of Social Forestry Division, Golaghat, and Eastern Wildlife Division, Bokakhat of Assam Forest Department, for their help in the collection of samples from the diseased trees. We would like to extend our gratitude to NCMR, Pune, for ITS sequencing. The financial support by the Indian Council of Forestry Research and Education, Dehradun, is gratefully acknowledged.

Funders	Funder number
Indian Council of Forestry Research and Education
Indian Council of Forestry Research and Education, Dehradun
Institute of Turkish Studies

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title = "Fusarium equiseti is associated with the wilt and dieback of Aquilaria malaccensis in Northeast India",

abstract = "Aquilaria malaccensis, categorized by IUCN as globally vulnerable, is in high demand in the Middle East and Asian markets for its unique resinous agarwood. In August 2015, symptoms of dieback were observed on A. malaccensis trees planted in the Medicinal and Aromatic Plant Garden, Panbari, Golaghat of the Assam Forest Department. The entire crowns of 70 trees showed complete leaf loss and severe dieback. Rotting at the collar region and of roots was also observed. Isolation from the infected roots consistently yielded Fusarium equiseti identified following standard laboratory procedures and analysis of the internal transcribed spacer (ITS) sequence of the ribosomal DNA. Symptoms of wilt, dieback and root rot were observed on 5-month-old Aquilaria seedlings 25 days after inoculation with the isolated fungus. This paper is the first report of F. equiseti causing wilt and dieback of A. malaccensis.",

author = "Shailesh Pandey and Rishi, \{R. Raja\} and Jayaraj, \{R. S.C.\} and Krishna Giri and Rajesh Kumar and Amit Pandey and Ranjana Juwantha and Sheeba Madaan and Bhandari, \{Maneesh S.\}",

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year = "2019",

month = apr,

doi = "10.1111/efp.12489",

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AU - Pandey, Shailesh

AU - Rishi, R. Raja

AU - Jayaraj, R. S.C.

AU - Giri, Krishna

AU - Kumar, Rajesh

AU - Pandey, Amit

AU - Juwantha, Ranjana

AU - Madaan, Sheeba

AU - Bhandari, Maneesh S.

PY - 2019/4

Y1 - 2019/4

N2 - Aquilaria malaccensis, categorized by IUCN as globally vulnerable, is in high demand in the Middle East and Asian markets for its unique resinous agarwood. In August 2015, symptoms of dieback were observed on A. malaccensis trees planted in the Medicinal and Aromatic Plant Garden, Panbari, Golaghat of the Assam Forest Department. The entire crowns of 70 trees showed complete leaf loss and severe dieback. Rotting at the collar region and of roots was also observed. Isolation from the infected roots consistently yielded Fusarium equiseti identified following standard laboratory procedures and analysis of the internal transcribed spacer (ITS) sequence of the ribosomal DNA. Symptoms of wilt, dieback and root rot were observed on 5-month-old Aquilaria seedlings 25 days after inoculation with the isolated fungus. This paper is the first report of F. equiseti causing wilt and dieback of A. malaccensis.

AB - Aquilaria malaccensis, categorized by IUCN as globally vulnerable, is in high demand in the Middle East and Asian markets for its unique resinous agarwood. In August 2015, symptoms of dieback were observed on A. malaccensis trees planted in the Medicinal and Aromatic Plant Garden, Panbari, Golaghat of the Assam Forest Department. The entire crowns of 70 trees showed complete leaf loss and severe dieback. Rotting at the collar region and of roots was also observed. Isolation from the infected roots consistently yielded Fusarium equiseti identified following standard laboratory procedures and analysis of the internal transcribed spacer (ITS) sequence of the ribosomal DNA. Symptoms of wilt, dieback and root rot were observed on 5-month-old Aquilaria seedlings 25 days after inoculation with the isolated fungus. This paper is the first report of F. equiseti causing wilt and dieback of A. malaccensis.

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Fusarium equiseti is associated with the wilt and dieback of Aquilaria malaccensis in Northeast India

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