DOI: 10.1111/j.1365-313x.2007.03070.x. Cell division activity determines the magnitude of phosphate starvation responses in Arabidopsis

Cell division activity determines the magnitude of phosphate starvation responses in Arabidopsis

10.1111/j.1365-313x.2007.03070.x

Crossref journal-article

Wiley

The Plant Journal (311)

Abstract

SummaryPhosphate (Pi) is a major limiting factor for plant growth. Plants respond to limiting Pi supplies by inducing a suite of adaptive responses comprising altered growth behaviour, enhanced Pi acquisition and reduced Pi demand that together define a distinct physiological state. In Pi‐starved plants, continued root growth is required for Pi acquisition from new sources, yet meristem activity consumes Pi. Therefore, we analysed the relationship between organ growth, phosphate starvation‐responsive (PSR) gene expression and Pi content in Arabidopsis thaliana under growth‐promoting or inhibitory conditions. Induction of PSR gene expression after transfer of plants to Pi‐depleted conditions quantitatively reflects prior levels of Pi acquisition, and hence is sensitive to the balance of Pi supply and demand. When plants are Pi‐starved, enhanced root or shoot growth exacerbates, whereas growth inhibition suppresses, Pi starvation responses, suggesting that the magnitude of organ growth activity specifies the level of Pi demand. Inhibition of cell‐cycle activity, but not of cell expansion or cell growth, reduces Pi starvation‐responsive gene expression. Thus, the level of cell‐cycle activity specifies the magnitude of Pi demand in Pi‐starved plants. We propose that cell‐cycle activity is the ultimate arbiter for Pi demand in growing organs, and that other factors that influence levels of PSR gene expression do so by affecting growth through modulation of meristem activity.

Bibliography

Lai, F., Thacker, J., Li, Y., & Doerner, P. (2007). Cell division activity determines the magnitude of phosphate starvation responses in Arabidopsis. The Plant Journal, 50(3), 545â556. Portico.

Authors 4

Fan Lai (first)
Jennifer Thacker (additional)
Yuanyuan Li (additional)
Peter Doerner (additional)

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Dates

Type	When
Created	18 years, 4 months ago (April 5, 2007, 8:37 p.m.)
Deposited	1 year, 10 months ago (Oct. 9, 2023, 8:50 p.m.)
Indexed	1 month, 2 weeks ago (July 13, 2025, 10:29 p.m.)
Issued	18 years, 4 months ago (April 5, 2007)
Published	18 years, 4 months ago (April 5, 2007)
Published Online	18 years, 4 months ago (April 5, 2007)
Published Print	18 years, 3 months ago (May 1, 2007)

Funders 0

None

BibTeX

@article{Lai_2007, title={Cell division activity determines the magnitude of phosphate starvation responses in Arabidopsis}, volume={50}, ISSN={1365-313X}, url={http://dx.doi.org/10.1111/j.1365-313x.2007.03070.x}, DOI={10.1111/j.1365-313x.2007.03070.x}, number={3}, journal={The Plant Journal}, publisher={Wiley}, author={Lai, Fan and Thacker, Jennifer and Li, Yuanyuan and Doerner, Peter}, year={2007}, month=apr, pages={545–556} }

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