The Arabidopsis 26S proteasome subunit RPN1a is required for optimal plant growth and stress responses.

Songhu Wang; Jasmina Kurepa; Jan A. Smalle

doi:10.1093/pcp/pcp105

The Arabidopsis 26S proteasome subunit RPN1a is required for optimal plant growth and stress responses.

Songhu Wang, Jasmina Kurepa, Jan A. Smalle

Plant and Soil Sciences

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

57 Scopus citations

Abstract

The current literature offers contradictory results regarding the role of the proteasome subunit RPN1a in Arabidopsis development. Here we show that plants lacking RPN1a are viable and have increased cell sizes, decreased heat shock tolerance, increased oxidative stress tolerance and other phenotypes characteristic for 26S proteasome subunit mutants. These results strengthen our contention that most of the phenotypes of 26S proteasome mutants in Arabidopsis described to date reflect a general impairment in 26S proteasome function rather than a specific defect of a single subunit, and suggest that the role of the RPN1a subunit during embryogenesis needs to be reconsidered.

Original language	English
Pages (from-to)	1721-1725
Number of pages	5
Journal	Plant and Cell Physiology
Volume	50
Issue number	9
DOIs	https://doi.org/10.1093/pcp/pcp105
State	Published - 2009

Bibliographical note

Funding Information:
The Kentucky Tobacco Research and Development Center; the USDA Cooperative State Research, Education and Extension Service (grant No. 2005-35304-16043); the Kentucky Science and Engineering Foundation (grant No. 148-502-06-189).

ASJC Scopus subject areas

Physiology
Plant Science
Cell Biology

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title = "The Arabidopsis 26S proteasome subunit RPN1a is required for optimal plant growth and stress responses.",

abstract = "The current literature offers contradictory results regarding the role of the proteasome subunit RPN1a in Arabidopsis development. Here we show that plants lacking RPN1a are viable and have increased cell sizes, decreased heat shock tolerance, increased oxidative stress tolerance and other phenotypes characteristic for 26S proteasome subunit mutants. These results strengthen our contention that most of the phenotypes of 26S proteasome mutants in Arabidopsis described to date reflect a general impairment in 26S proteasome function rather than a specific defect of a single subunit, and suggest that the role of the RPN1a subunit during embryogenesis needs to be reconsidered.",

author = "Songhu Wang and Jasmina Kurepa and Smalle, {Jan A.}",

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AB - The current literature offers contradictory results regarding the role of the proteasome subunit RPN1a in Arabidopsis development. Here we show that plants lacking RPN1a are viable and have increased cell sizes, decreased heat shock tolerance, increased oxidative stress tolerance and other phenotypes characteristic for 26S proteasome subunit mutants. These results strengthen our contention that most of the phenotypes of 26S proteasome mutants in Arabidopsis described to date reflect a general impairment in 26S proteasome function rather than a specific defect of a single subunit, and suggest that the role of the RPN1a subunit during embryogenesis needs to be reconsidered.

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The Arabidopsis 26S proteasome subunit RPN1a is required for optimal plant growth and stress responses.

Abstract

Bibliographical note

ASJC Scopus subject areas

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