Crosstalk between ABA and auxin signaling pathways in roots of Arabidopsis thaliana (L.) Heynh.

Rock, Christopher D.; Sun, Xin

doi:10.1007/s00425-005-1521-9

Cited by 81 publications

(70 citation statements)

References 70 publications

(89 reference statements)

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“…These results support the variable resistance of axr4 to ABA, which was reported previously (Hobbie and Estelle, 1995). Additionally, another study reported cross talk between ABA and auxin signaling (axr4; Rock and Sun, 2005). The interaction of axr4 with cytokinin was present in all five PC RS (Table III) and fits with previous observations of variation in relative root elongation reported for axr4-1 at particular CK concentrations (Hobbie and Estelle, 1995).…”

Section: Comparison Of Pcs Captured By Rootscape Versus Individual Trsupporting

confidence: 90%

RootScape: A Landmark-Based System for Rapid Screening of Root Architecture in Arabidopsis

et al. 2013

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The architecture of plant roots affects essential functions including nutrient and water uptake, soil anchorage, and symbiotic interactions. Root architecture comprises many features that arise from the growth of the primary and lateral roots. These root features are dictated by the genetic background but are also highly responsive to the environment. Thus, root system architecture (RSA) represents an important and complex trait that is highly variable, affected by genotype 3 environment interactions, and relevant to survival/performance. Quantification of RSA in Arabidopsis (Arabidopsis thaliana) using platebased tissue culture is a very common and relatively rapid assay, but quantifying RSA represents an experimental bottleneck when it comes to medium-or high-throughput approaches used in mutant or genotype screens. Here, we present RootScape, a landmark-based allometric method for rapid phenotyping of RSA using Arabidopsis as a case study. Using the software AAMToolbox, we created a 20-point landmark model that captures RSA as one integrated trait and used this model to quantify changes in the RSA of Arabidopsis (Columbia) wild-type plants grown under different hormone treatments. Principal component analysis was used to compare RootScape with conventional methods designed to measure root architecture. This analysis showed that RootScape efficiently captured nearly all the variation in root architecture detected by measuring individual root traits and is 5 to 10 times faster than conventional scoring. We validated RootScape by quantifying the plasticity of RSA in several mutant lines affected in hormone signaling. The RootScape analysis recapitulated previous results that described complex phenotypes in the mutants and identified novel gene 3 environment interactions.

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Section: Comparison Of Pcs Captured By Rootscape Versus Individual Trsupporting

confidence: 90%

RootScape: A Landmark-Based System for Rapid Screening of Root Architecture in Arabidopsis

et al. 2013

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“…TF families known to participate in hormone signaling in angiosperms are also found in Chlamydomonas (Table 1). Recent work on ABSCISIC ACID INSENSITIVE 3 (ABI3) from Arabidopsis has indicated a possible role in cross talk of abscisic acid and auxin response pathways (Brady et al 2003;Rock and Sun 2005). A similar observation was made for VP1 from maize, the ortholog of ABI3 (Suzuki et al 2001).…”

Section: Transcription Factors In Eukaryotesmentioning

confidence: 64%

Green Transcription Factors: A Chlamydomonas Overview

et al. 2008

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Transcription factors (TFs) control gene expression by interacting with cis-elements in target gene promoters. Transcription regulators (TRs) assist in controlling gene expression through interaction with TFs, chromatin remodeling, or other mechanisms. Both types of proteins thus constitute master controllers of dynamic transcriptional networks. To uncover such control elements in the photosynthetic green alga Chlamydomonas reinhardtii, we performed a comprehensive analysis of its genome sequence. In total, we identified 234 genes encoding 147 TFs and 87 TRs of $40 families. The set of putative TFs and TRs, including their transcript and protein sequences, domain architectures, and supporting information about putative orthologs, is available at http:/ /plntfdb.bio.uni-potsdam.de/v2.0/. Twelve of 34 plant-specific TF families were found in at least one algal species, indicating their early evolutionary origin. Twenty-two plant-specific TF families and one plant-specific TR family were not observed in algae, suggesting their specific association with developmental or physiological processes characteristic to multicellular plants. We also analyzed the occurrence of proteins that constitute the light-regulated transcriptional network in angiosperms and found putative algal orthologs for most of them. Our analysis provides a solid ground for future experimental studies aiming at deciphering the transcriptional regulatory networks in green algae.

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“…The antagonism between JA and SA is well established ; more recently, it has been shown that ABA plays an important role in bacterial virulence and that ABA suppresses chemically induced SAR (de Torres-Zabala et al, 2007Yasuda et al, 2008). Auxin has been shown to act antagonistically to ABA in the regulation of stomatal opening, and both hormones also interact in the regulation of root development (Rock and Sun, 2005). Enhanced ABA levels in aux1 may act to suppress both SA biosynthesis and responses to SA, as appears to occur during local DC3000 infection (de Torres Zabala et al, 2009).…”

Section: The Aux1 Mutant Distorts the Hormone Profile Of Sar Leavesmentioning

confidence: 99%

Arabidopsis Auxin Mutants Are Compromised in Systemic Acquired Resistance and Exhibit Aberrant Accumulation of Various Indolic Compounds

Truman

Bennett²,

Turnbull³

et al. 2010

Plant Physiology

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Systemic acquired resistance is a widespread phenomenon in the plant kingdom that confers heightened and often enduring immunity to a range of diverse pathogens. Systemic immunity develops through activation of plant disease resistance protein signaling networks following local infection with an incompatible pathogen. The accumulation of the phytohormone salicylic acid in systemically responding tissues occurs within days after a local immunizing infection and is essential for systemic resistance. However, our knowledge of the signaling components underpinning signal perception and the establishment of systemic immunity are rudimentary. Previously, we showed that an early and transient increase in jasmonic acid in distal responding tissues was central to effective establishment of systemic immunity. Based upon predicted transcriptional networks induced in naive Arabidopsis (Arabidopsis thaliana) leaves following avirulent Pseudomonas syringae challenge, we show that a variety of auxin mutants compromise the establishment of systemic immunity. Linking together transcriptional and targeted metabolite studies, our data provide compelling evidence for a role of indole-derived compounds, but not auxin itself, in the establishment and maintenance of systemic immunity.

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Crosstalk between ABA and auxin signaling pathways in roots of Arabidopsis thaliana (L.) Heynh.

Cited by 81 publications

References 70 publications

RootScape: A Landmark-Based System for Rapid Screening of Root Architecture in Arabidopsis

RootScape: A Landmark-Based System for Rapid Screening of Root Architecture in Arabidopsis

Green Transcription Factors: A Chlamydomonas Overview

Arabidopsis Auxin Mutants Are Compromised in Systemic Acquired Resistance and Exhibit Aberrant Accumulation of Various Indolic Compounds

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