Phyllotactic pattern and stem cell fate are determined by the<i>Arabidopsis</i>homeobox gene<i>BELLRINGER</i>

Byrne, Mary E.; Groover, Andrew; Fontana, Joseph R.; Martienssen, Robert A.

doi:10.1242/dev.00620

Cited by 194 publications

(269 citation statements)

References 70 publications

Supporting

Mentioning

257

Contrasting

Order By: Relevance

“…3C,D) (Byrne et al, 2003;Douglas et al, 2002;Smith and Hake, 2003;Venglat et al, 2002). Plant architecture consists of repeating modules produced at the SAM called phytomers, each containing an internode, leaf and axillary meristem (Fig.…”

Section: Class I Knox Genes In Meristem and Compound Leaf Developmentmentioning

confidence: 99%

See 1 more Smart Citation

KNOX genes: versatile regulators of plant development and diversity

2010

View full text Add to dashboard Cite

SummaryKnotted1-like homeobox (KNOX) proteins are homeodomain transcription factors that maintain an important pluripotent cell population called the shoot apical meristem, which generates the entire above-ground body of vascular plants. KNOX proteins regulate target genes that control hormone homeostasis in the meristem and interact with another subclass of homeodomain proteins called the BELL family. Studies in novel genetic systems, both at the base of the land plant phylogeny and in flowering plants, have uncovered novel roles for KNOX proteins in sculpting plant form and its diversity. Here, we discuss how KNOX proteins influence plant growth and development in a versatile context-dependent manner.

show abstract

Section: Class I Knox Genes In Meristem and Compound Leaf Developmentmentioning

confidence: 99%

“…2) (Byrne et al, 2003;Roeder et al, 2003;Smith and Hake, 2003). Additional STM-BELL dimers are likely to promote SAM activity, as triple mutants of the BELL genes BLR, POUND-FOOLISH, ARABIDOPSIS THALIANA HOMEOBOX1 are shootless (Rutjens et al, 2009).…”

Section: Petal Spurmentioning

confidence: 99%

KNOX genes: versatile regulators of plant development and diversity

2010

View full text Add to dashboard Cite

show abstract

“…Mutants that are defective in boundary specification, such as Arabidopsis knox and bell mutants, exhibit aberrant branching patterns (Byrne et al, 2003;Smith and Hake, 2003;Ragni et al, 2008). In maize, the male inflorescence (tassel) has long branches that develop from indeterminate meristems at the base of the inflorescence (Tanaka et al, 2013).…”

Section: Ligule Genes Are Expressed At Multiple Organ Boundariesmentioning

confidence: 99%

Transcriptomic Analyses Indicate That Maize Ligule Development Recapitulates Gene Expression Patterns That Occur during Lateral Organ Initiation

et al. 2014

View full text Add to dashboard Cite

Development of multicellular organisms proceeds via the correct interpretation of positional information to establish boundaries that separate developmental fields with distinct identities. The maize (Zea mays) leaf is an ideal system to study plant morphogenesis as it is subdivided into a proximal sheath and a distal blade, each with distinct developmental patterning. Specialized ligule and auricle structures form at the blade-sheath boundary. The auricles act as a hinge, allowing the leaf blade to project at an angle from the stem, while the ligule comprises an epidermally derived fringe. Recessive liguleless1 mutants lack ligules and auricles and have upright leaves. We used laser microdissection and RNA sequencing to identify genes that are differentially expressed in discrete cell/tissue-specific domains along the proximal-distal axis of wild-type leaf primordia undergoing ligule initiation and compared transcript accumulation in wild-type and liguleless1-R mutant leaf primordia. We identified transcripts that are specifically upregulated at the blade-sheath boundary. A surprising number of these "ligule genes" have also been shown to function during leaf initiation or lateral branching and intersect multiple hormonal signaling pathways. We propose that genetic modules utilized in leaf and/or branch initiation are redeployed to regulate ligule outgrowth from leaf primordia.

show abstract

“…STM is required for the initiation of the meristem during embryogenesis and its maintenance during postembryonic development (Clark et al, 1996;Endrizzi et al, 1996;Long et al, 1996). BP contributes with STM to SAM maintenance since the loss of function of BP reduces the residual meristematic activity of the weak allele stm-2 (Byrne et al, 2002(Byrne et al, , 2003. Like BP, KNAT6 contributes redundantly with STM to SAM function, as the inactivation of KNAT6 abolishes the meristematic potential of the weak allele stm-2 (Belles- Boix et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…KNAT2 also is expressed in the SAM, but its role is unclear as its inactivation does not aggravate stm-2, knat6 stm-2, or knat6 bp stm-2 phenotypes (Belles-Boix et al, 2006). PENNYWISE (PNY), a member of the BELL family, also known as BELLRINGER, REPLUMLESS (RPL), or VAAMANA, contributes to SAM maintenance redundantly with STM (Byrne et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Interaction ofKNAT6andKNAT2withBREVIPEDICELLUSandPENNYWISEinArabidopsisInflorescences

et al. 2008

View full text Add to dashboard Cite

The three amino acid loop extension (TALE) homeodomain superfamily, which comprises the KNOTTED-like and BEL1-like families, plays a critical role in regulating meristem activity. We previously demonstrated a function for KNAT6 (for KNOTTED-like from Arabidopsis thaliana 6) in shoot apical meristem and boundary maintenance during embryogenesis. KNAT2, the gene most closely related to KNAT6, does not play such a role. To investigate the contribution of KNAT6 and KNAT2 to inflorescence development, we examined their interactions with two TALE genes that regulate internode patterning, BREVIPEDICELLUS (BP) and PENNYWISE (PNY). Our data revealed distinct and overlapping interactions of KNAT6 and KNAT2 during inflorescence development. Removal of KNAT6 activity suppressed the pny phenotype and partially rescued the bp phenotype. Removal of KNAT2 activity had an effect only in the absence of both BP and KNAT6 or in the absence of both BP and PNY. Consistent with this, KNAT6 and KNAT2 expression patterns were enlarged in both bp and pny mutants. Thus, the defects seen in pny and bp are attributable mainly to the misexpression of KNAT6 and to a lesser extent of KNAT2. Hence, our data showed that BP and PNY restrict KNAT6 and KNAT2 expression to promote correct inflorescence development. This interaction was also revealed in the carpel.

show abstract

Phyllotactic pattern and stem cell fate are determined by theArabidopsishomeobox geneBELLRINGER

Cited by 194 publications

References 70 publications

KNOX genes: versatile regulators of plant development and diversity

KNOX genes: versatile regulators of plant development and diversity

Transcriptomic Analyses Indicate That Maize Ligule Development Recapitulates Gene Expression Patterns That Occur during Lateral Organ Initiation

Interaction ofKNAT6andKNAT2withBREVIPEDICELLUSandPENNYWISEinArabidopsisInflorescences

Contact Info

Product

Resources

About