Cited by 108Plant Molecular Biology ResearchPlant Parasitism and ResistancePlant nutrient uptake and metabolism

Feedback regulation of xylem cytokinin content is conserved in pea and Arabidopsis

Open access
Foo, Eloise, Morris, Suzanne E., Parmenter, Kathy, Young, Naomi, Wang, Huiting, Jones, Alun, Rameau, Catherine, Turnbull, Colin G.N. +1 more·2007·Plant Physiology

Abstract

Increased-branching mutants of garden pea (Pisum sativum; ramosus [rms]) and Arabidopsis (Arabidopsis thaliana; more axillary branches) were used to investigate control of cytokinin export from roots in relation to shoot branching. In particular, we tested the hypothesis that regulation of xylem sap cytokinin is dependent on a long-distance feedback signal moving from shoot to root. With the exception of rms2, branching mutants from both species had greatly reduced amounts of the major cytokinins zeatin riboside, zeatin, and isopentenyl adenosine in xylem sap compared with wild-type plants. Reciprocally grafted mutant and wild-type Arabidopsis plants gave similar results to those observed previously in pea, with xylem sap cytokinin down-regulated in all graft combinations possessing branched shoots, regardless of root genotype. This long-distance feedback mechanism thus appears to be conserved between pea and Arabidopsis. Experiments with grafted pea plants bearing two shoots of the same or different genotype revealed that regulation of root cytokinin export is probably mediated by an inhibitory signal. Moreover, the signaling mechanism appears independent of the number of growing axillary shoots because a suppressed axillary meristem mutation that prevents axillary meristem development at most nodes did not abolish long-distance regulation of root cytokinin export in rms4 plants. Based on double mutant and grafting experiments, we conclude that RMS2 is essential for long-distance feedback regulation of cytokinin export from roots. Finally, the startling disconnection between cytokinin content of xylem sap and shoot tissues of various rms mutants indicates that shoots possess powerful homeostatic mechanisms for regulation of cytokinin levels.

Integrity signals

Registry

Crossref · 10.1104/pp.106.093708

Cites

46 of 46 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

1 of the 47 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Foo, E., Morris, S. E., Parmenter, K., Young, N., Wang, H., Jones, A., Rameau, C., Turnbull, C. G. N., & Beveridge, C. A.
Affiliations
Australian Research Council (AU)
Corresponding author
Beveridge, Christine A.
Venue
Plant Physiology
Published
2007-02-02
Volume
143
Issue
3
Pages
1418-1428
ISSN
  • 0032-0889 (ISSN-L)
  • 1532-2548
OpenAlex
W2101298953
Cited by
107
References
47
Citations by year
2024: 4 · 2023: 6 · 2022: 3 · 2021: 3 · 2020: 10 · 2019: 3 · 2018: 4 · 2017: 5 · 2016: 6 · 2015: 4 · 2014: 8 · 2013: 8 · 2012: 12
FWCI
9.72
Type
journal article
Language
en
Open access
Locations
  • PLANT PHYSIOLOGY (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UTAS Research Repository (acceptedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Directorate for Biological Sciences
  • Biotechnology and Biological Sciences Research Council (P18282)
  • Australian Research Council
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
Keywords
shoot branching, zeatin riboside, zeatin, isopentenyladenosine, shoot-to-root signaling, axillary meristem, grafting, cytokinin homeostasis, Pisum sativum, Arabidopsis thaliana
MeSH terms
Adenosine, Cytokinins, Genotype, Homeostasis, Isopentenyladenosine, Mutation, Plant Proteins, Zeatin, Signal Transduction, Arabidopsis, Plant Roots, Plant Shoots, Pisum sativum, Feedback, Physiological, Arabidopsis Proteins, Xylem

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review