DOI: 10.1111/j.1365-313x.2008.03460.x. Characterization of a sub‐family of Arabidopsis genes with the SPX domain reveals their diverse functions in plant tolerance to phosphorus starvation

Characterization of a sub‐family of Arabidopsis genes with the SPX domain reveals their diverse functions in plant tolerance to phosphorus starvation

10.1111/j.1365-313x.2008.03460.x

Crossref journal-article

Wiley

The Plant Journal (311)

Abstract

SummaryFour genes of Arabidopsis (At5g20150, At2g26660, At2g45130 and At5g15330) encoding no conservative region other than an SPX domain (SYG1, Pho81 and XPR1) were named AtSPX1–AtSPX4. The various subcellular localizations of their GFP fusion proteins implied function variations for the four genes. Phosphate starvation strongly induced expression of AtSPX1 and AtSPX3 with distinct dynamic patterns, while AtSPX2 was weakly induced and AtSPX4 was suppressed. Expression of the four AtSPX genes was reduced to different extents in the Arabidopsis phr1 and siz1 mutants under phosphate starvation, indicating that they are part of the phosphate‐signaling network that involves SIZ1/PHR1. Over‐expression of AtSPX1 increased the transcript levels of ACP5, RNS1 and PAP2 under both phosphate‐sufficient and phosphate‐deficient conditions, suggesting a potential transcriptional regulation role of AtSPX1 in response to phosphate starvation. Partial repression of AtSPX3 by RNA interference led to aggravated phosphate‐deficiency symptoms, altered P allocation and enhanced expression of a subset od phosphate‐responsive genes including AtSPX1. Our results indicate that both AtSPX1 and AtSPX3 play positive roles in plant adaptation to phosphate starvation, and AtSPX3 may have a negative feedback regulatory role in AtSPX1 response to phosphate starvation.

Bibliography

Duan, K., Yi, K., Dang, L., Huang, H., Wu, W., & Wu, P. (2008). Characterization of a subâfamily of Arabidopsis genes with the SPX domain reveals their diverse functions in plant tolerance to phosphorus starvation. The Plant Journal, 54(6), 965â975. Portico.

Authors 6

Ke Duan (first)
Keke Yi (additional)
Lei Dang (additional)
Hongjie Huang (additional)
Wei Wu (additional)
Ping Wu (additional)

References 39 Referenced 271

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{'key': 'e_1_2_6_27_1', 'first-page': '401', 'article-title': 'Expression of a gene specific for iron deficiency (Ids3) in the roots of Hordeum vulgare', 'volume': '34', 'author': 'Nakanishi H.', 'year': '1993', 'journal-title': 'Plant Cell Physiol.'} / Plant Cell Physiol. / Expression of a gene specific for iron deficiency (Ids3) in the roots of Hordeum vulgare by Nakanishi H. (1993)
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Dates

Type	When
Created	17 years, 5 months ago (Feb. 26, 2008, 10:16 p.m.)
Deposited	1 year, 10 months ago (Sept. 28, 2023, 11:24 a.m.)
Indexed	3 days, 17 hours ago (Aug. 21, 2025, 1:44 p.m.)
Issued	17 years, 5 months ago (Feb. 26, 2008)
Published	17 years, 5 months ago (Feb. 26, 2008)
Published Online	17 years, 5 months ago (Feb. 26, 2008)
Published Print	17 years, 2 months ago (June 1, 2008)

Funders 0

None

BibTeX

@article{Duan_2008, title={Characterization of a sub‐family of Arabidopsis genes with the SPX domain reveals their diverse functions in plant tolerance to phosphorus starvation}, volume={54}, ISSN={1365-313X}, url={http://dx.doi.org/10.1111/j.1365-313x.2008.03460.x}, DOI={10.1111/j.1365-313x.2008.03460.x}, number={6}, journal={The Plant Journal}, publisher={Wiley}, author={Duan, Ke and Yi, Keke and Dang, Lei and Huang, Hongjie and Wu, Wei and Wu, Ping}, year={2008}, month=feb, pages={965–975} }

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