The Arabidopsis (Arabidopsis thaliana) inositol polyphosphate 6-/3-kinase gene (AtIpk2beta) is known to participate in inositol phosphate metabolism. However, little is known about its physiological functions in higher plants. Here, we report that AtIpk2beta regulates Arabidopsis axillary shoot branching. By overexpressing AtIpk2beta in the wild type and mutants, we found that overexpression of AtIpk2beta leads to more axillary shoot branches. Further analysis of AtIpk2beta overexpression lines showed that axillary meristem forms earlier and the bud outgrowth rate is also accelerated, resulting in more axillary shoot branches. The AtIpk2beta promoter/beta-glucuronidase (GUS) fusion (AtIpk2betaGUS) expression pattern is similar to that of the auxin reporter DR5GUS. Moreover, AtIpk2beta can be induced in response to exogenous indole-3-acetic acid (IAA) treatments. In addition, AtIpk2beta overexpression plants exhibit IAA-related phenotypes and are more resistant to exogenous IAA treatments. Further analysis employing reverse transcription-polymerase chain reaction shows that some genes, including auxin-biosynthesis (CYP83B1), auxin-transport (PIN4), and auxin-mediated branching genes (MAX4 and SPS), are regulated by AtIpk2beta. Taken together, our data provide insights into a role for AtIpk2beta in axillary shoot branching through the auxin signaling pathway.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1914203 | PMC |
| http://dx.doi.org/10.1104/pp.106.092163 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Boron controls apical dominance in Pea (Pisum sativum) via promoting polar auxin transport.
Physiol Plant
January 2025
International Research Center for Environmental Membrane Biology & Department of Horticulture, Foshan University, Foshan, China.
Plant architecture and subsequent productivity are determined by the shoot apical dominance, which is disturbed by the deficiency of boron, one of the essential trace elements for plant growth and reproduction. However, the mechanism by which B controls shoot apical dominance or axillary bud outgrows under B deficiency is still unclear. This work aimed to investigate the mechanistic basis of this process, with focus on the interaction between B and polar auxin transport.
View Article and Find Full Text PDFRoot Development of Tomato Plants Infected by the Cacao Pathogen Moniliophthora perniciosa Is Affected by Limited Sugar Availability.
Plant Cell Environ
January 2025
Centro de Energia Nuclear na Agricultura, Universidade de São Paulo (USP), Piracicaba, São Paulo, Brazil.
Moniliophthora perniciosa is the causal agent of the witches' broom disease of cacao (Theobroma cacao), and it can infect the tomato (Solanum lycopersicum) 'Micro-Tom' (MT) cultivar. Typical symptoms of infection are stem swelling and axillary shoot outgrowth, whereas reduction in root biomass is another side effect. Using infected MT, we investigated whether impaired root growth derives from hormonal imbalance or sink competition.
View Article and Find Full Text PDFTissue-specific resistance and susceptibility to the tomato brown rugose fruit virus (ToBRFV) conferred by Solanum pennellii loci.
BMC Plant Biol
January 2025
The Institute of Plant Sciences and Genetics, Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot, 7610001, Israel.
Background: Plant breeding research heavily relies on wild species, which harbor valuable traits for modern agriculture. This work employed a new introgression population derived from Solanum pennellii (LA5240), a wild tomato native to Peru, composed of 1,900 genotyped backcross inbred lines (BILs_BC2S6) in the tomato inbreds LEA and TOP cultivated genetic backgrounds. This Peruvian accession was found resistant to the most threatening disease of tomatoes today, caused by the tobamovirus tomato brown rugose fruit virus (ToBRFV).
View Article and Find Full Text PDFSugar Transport and Signaling in Shoot Branching.
Int J Mol Sci
December 2024
Institut Agro, Univ Angers, INRAE, IRHS, SFR QuaSaV, 49000 Angers, France.
The source-sink relationship is critical for proper plant growth and development, particularly for vegetative axillary buds, whose activity shapes the branching pattern and ultimately the plant architecture. Once formed from axillary meristems, axillary buds remain dormant or become active to grow into new branches. This transition is notably driven by the regulation of the bud sink strength, which is reflected in the ability to unload, metabolize and store photoassimilates.
View Article and Find Full Text PDFOptimization of Selected Minerals and a Cytokinin for Propagation of Little-Leaf Mockorange ( A. Gray) Using Response Surface Methodology (RSM).
Plants (Basel)
December 2024
Department of Plant Sciences, Aberdeen Research and Extension Center, University of Idaho, Aberdeen, ID 83210, USA.
Optimizing concentrations of minerals and phytohormones is essential when culturing a new plant species. The objective of this study was to use Response Surface Methodology (RSM) to evaluate combinations of selected minerals (N, Ca, and P) along with zeatin (Zea) to obtain optimum shoot growth of little-leaf mockorange. Forty-six treatment combinations were assigned using Proc Optex in SAS software version 9.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!