A molecular marker for lateral root initiation: The RSI-1 gene of tomato (Lycopersicon esculentum Mill) is activated in early lateral root primordia

Taylor, Brian H.; Scheuring, Chantel F.

doi:10.1007/bf00280311

Cited by 95 publications

(39 citation statements)

References 49 publications

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“…A database search showed that GEG belongs to a gene family encoding putative small cell wall proteins with a cysteine-rich domain and a putative signal peptide sequence. This family includes GAST1 (for GA-stimulated transcript 1) of tomato, GASA-1 (for GA stimulated in Arabidopsis), GIP (for GA-induced gene of petunia), and RSI-1 (for root system inducible 1) of tomato (Shi et al, 1992;Taylor and Scheuring, 1994;Herzog et al, 1995;Ben-Nissan and Weiss, 1996). GEG expression was experimentally induced by treatment with GA 3 , which is similar to previous reports indicating that these genes are GA or auxin inducible.…”

Section: Introductionsupporting

confidence: 87%

“…Sequence comparisons show that GEG belongs to a family of genes that are transcriptionally regulated by phytohormones in different plants. The predicted GEG protein has high sequence similarity with proteins encoded by genes whose expression is induced by GA ( GAST1 of tomato, GASA1-4 of Arabidopsis, and GIP of petunia) or by auxin ( RSI-1 of tomato) (Shi et al, 1992;Taylor and Scheuring, 1994;Herzog et al, 1995;Ben-Nissan and Weiss, 1996). All of the derived polypeptides have a putative signal sequence at their N termini, with cleavage sites predicted according to von Heijne (1986).…”

Section: Isolation Of a Geg Cdna By Differential Screeningmentioning

confidence: 99%

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GEG Participates in the Regulation of Cell and Organ Shape during Corolla and Carpel Development in Gerbera hybrida

Kotilainen¹,

Helariutta²,

Mehto³

et al. 1999

The Plant Cell

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The molecular mechanisms that control organ shape during flower development are largely unknown. By using differential hybridization techniques, a cDNA designated GEG (for Gerbera hybrida homolog of the gibberellin [GA]-stimulated transcript 1 [GAST1] from tomato) was isolated from a library representing late stages of corolla development in Gerbera. GEG expression was detected in corollas and carpels, with expression spatiotemporally coinciding with flower opening. In corollas and styles, GEG expression is temporally correlated with the cessation of longitudinal cell expansion. In plants constitutively expressing GEG, reduced corolla lengths and carpels with shortened and radially expanded stylar parts were found, with concomitant reduction of longitudinal cell expansion in these organs. In addition, in styles, an increase in radial cell expansion was detected. Taken together, these observations indicate a regulatory role for the GEG gene product in determining the shape of the corolla and carpel. The deduced amino acid sequence of the GEG gene product shares high similarity with previously characterized putative cell wall proteins encoded by GA-inducible genes, namely, GAST1, GIP (for GA-induced gene of petunia), and the GASA (for GA-stimulated in Arabidopsis) gene family. Our studies suggest that GEG, the expression of which can also be induced by application of GA3, plays a role in phytohormone-mediated cell expansion.

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Section: Introductionsupporting

confidence: 87%

Section: Isolation Of a Geg Cdna By Differential Screeningmentioning

confidence: 99%

GEG Participates in the Regulation of Cell and Organ Shape during Corolla and Carpel Development in Gerbera hybrida

Kotilainen¹,

Helariutta²,

Mehto³

et al. 1999

The Plant Cell

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“…All code for small proteins with a putative signal peptide at the N terminus and a conserved C-terminal region of approximately 60 amino acids containing 12 cysteine residues in conserved positions. The corres-ponding genes are expressed during diverse developmental processes, including shoot and petal cell elongation (Ben-Nissan and Weiss, 1996;Shi et al, 1992), cessation of cell elongation (Kotilainen et al, 1999), cell division (Aubert et al, 1998;Ben-Nissan et al, 2004), fruit maturation (Medina-Escobar et al, 1997) and root elongation (Ikeda et al, 1997;Taylor and Scheuring, 1994). The potato homologs SNAKIN-1 and 2 (StSN1 and 2) are expressed in response to wounding and pathogen infection (Berrocal-Lobo et al, 2002;Segura et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…The experiment was repeated three times with similar results. elongation (promotion and inhibition), transition to flowering, root development, fruit development and defense(Aubert et al, 1998;Ben-Nissan et al, 2004;Berrocal-Lobo et al, 2002;Ikeda et al, 1997;Kotilainen et al, 1999;Medina- Escobar et al, 1997;Segura et al, 1999;Shi et al, 1992;Taylor and Scheuring, 1994). However, it is not yet clear how these proteins exert their effect.…”

mentioning

confidence: 99%

The gibberellin‐induced, cysteine‐rich protein GIP2 from Petunia hybrida exhibits in planta antioxidant activity

et al. 2006

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SummaryNumerous GAST-like genes have been identified in various plant species. All code for small proteins with a conserved C-terminal region in which 12 cysteines are located in exactly the same positions. We have previously identified five gibberellin (GA)-induced GAST1-like genes in petunia, GIP1-5. GIP2 is expressed in elongating zones, and its suppression in transgenic petunia plants inhibits stem elongation, suggesting a role for the protein in GA-induced cell growth. However, nothing is known about the biochemical activity of GIP2 or any other GAST-like protein. As all contain putative catalytic disulfide bonds (putative redox-active cysteines), we speculated that they might be involved in redox regulation. Expression analysis of GIP2, GIP4 and GIP5 revealed that they are induced by H 2 O 2 . To study whether GIP2 modulates H 2 O 2 levels, we generated transgenic petunia plants expressing GIP2 under the regulation of the ubiquitous CaMV 35S promoter. The transgene reduced H 2 O 2 levels in leaves following wounding. It also reduced the levels of H 2 O 2 in guard cells following osmotic stress and ABA treatments, leading to the suppression of stomatal closure. In addition, the transgene promoted stem and corolla elongation. As reactive oxygen species (ROS) are involved in cell elongation, we suggest that GIP2 affects growth by regulating the levels of ROS. As all known GAST-like proteins contain putative redox-active cysteines, they may all act as antioxidants.

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“…For this reason, we speculated that Pp-C61 is an extracellular protein. So far, differential screening of cDNA libraries from auxin-induced roots allowed the identification of genes up-regulated by auxin in roots of tomato (Taylor, Young & Scheuring 1993;Taylor & Scheuring 1994) and Arabidopsis (Neuteboom et al 1999). Although the function of most of the encoded polypeptides is unknown, they are all predicted to function at the cell wall level.…”

Section: Discussionmentioning

confidence: 99%

The auxin responsive gene Pp‐C61 is up‐regulated in Pinus pinaster roots following inoculation with ectomycorrhizal fungi

Reddy¹,

Pandey²,

Melayah

et al. 2003

Plant Cell & Environment

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M . Up-regulation was found to be a primary (direct) response to auxin. Ethylene and abscisic acid, but not quercetin were able to promote Pp-C61 mRNA accumulation. As a putative extracellular protein, Pp-C61 was postulated to play a role in ectomycorrhiza formation. Pp-C61 was upregulated in P. pinaster roots following inoculation with ectomycorrhizal fungi. Transcript accumulation was the highest (5.5-fold over control) in the presence of an IAAoverproducing mutant of Hebeloma cylindrosporum ; it was less in the presence of wild-type strains of H. cylindrosporum and Rhizopogon roseolus . Pp-C61 transcript also accumulated upon inoculation with a non-mycorrhizal mutant of H. cylindrosporum . These results suggest that Pp-C61 up-regulation corresponds to a defence reaction in response to fungal colonization.

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A molecular marker for lateral root initiation: The RSI-1 gene of tomato (Lycopersicon esculentum Mill) is activated in early lateral root primordia

Cited by 95 publications

References 49 publications

GEG Participates in the Regulation of Cell and Organ Shape during Corolla and Carpel Development in Gerbera hybrida

GEG Participates in the Regulation of Cell and Organ Shape during Corolla and Carpel Development in Gerbera hybrida

The gibberellin‐induced, cysteine‐rich protein GIP2 from Petunia hybrida exhibits in planta antioxidant activity

The auxin responsive gene Pp‐C61 is up‐regulated in Pinus pinaster roots following inoculation with ectomycorrhizal fungi

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