Brassinosteroids control AtEXPA5 gene expression in Arabidopsis thaliana

Park, Chan Ho; Kim, Tae‐Wuk; Son, Seung-Hyun; Hwang, Jung-Yun; Lee, Sang Cheul; Chang, Soo Chul; Kim, Soo-Hwan; Kim, Si Wouk; Kim, Seong‐Ki

doi:10.1016/j.phytochem.2009.11.003

Cited by 73 publications

(40 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17 Cell wall modifying proteins such as expansins and XTHs comprise large gene families [90][91][92] and individual members are known to be regulated by the hormones GA, ethylene, auxin and BR. [93][94][95][96] Auxin plays a role in the acidification of the apoplast, where auxin can lower the apoplastic pH within minutes. 97 This rapid acidification probably sets the optimal pH for cell wall modifying proteins such as expansins 98 and XTHs.…”

Section: Discussionmentioning

confidence: 99%

Physiological regulation and functional significance of shade avoidance responses to neighbors

Keuskamp

Sasidharan

Pierik

2010

Plant Signaling & Behavior

View full text Add to dashboard Cite

Besides being a source of energy, light is also a source of information that plants can respond to. Most plants are able to react to the direction, intensity, composition and duration of light. These light components regulate such features as seed germination, photomorphogenesis, flowering time and the SAS. [10][11][12] The SAS encompasses various phenotypic traits (Fig. 1), including elongation of internodes, petioles and hypocotyls, apical dominance, early flowering and upward leaf movement (hyponasty).

show abstract

Section: Discussionmentioning

confidence: 99%

Physiological regulation and functional significance of shade avoidance responses to neighbors

Keuskamp

Sasidharan

Pierik

2010

Plant Signaling & Behavior

View full text Add to dashboard Cite

show abstract

“…S9 in the supplementary material). AtEXP3 has been proposed to promote cell expansion (Kwon et al, 2008) and the Atexp5-1 mutant has smaller leaves than wild type (Park et al, 2010). These results suggest that cell enlargement in med25 mutants might, in part, result from increased expression of particular expansin genes.…”

Section: Increased Expression Of Expansin Genes In Med25-2mentioning

confidence: 92%

Control of final organ size by Mediator complex subunit 25 in Arabidopsis thaliana

2011

Development

114

132

View full text Add to dashboard Cite

Control of organ size by cell proliferation and cell expansion is a fundamental developmental process, but the mechanisms that establish the final size of organs and whole organisms remain elusive in plants and animals. We have previously demonstrated that DA1, which encodes a predicted ubiquitin receptor, controls the final size of seeds and organs by restricting cell proliferation in Arabidopsis. Through a genetic screen for mutations that enhance the floral organ size of da1-1, we have identified an enhancer of da1-1 (eod8-1). The eod8-1 mutation was identified, using a map-based cloning approach, in Mediator complex subunit 25 (MED25; also known as PFT1), which is involved in the transcriptional regulation of gene expression. Loss-of-function mutants in MED25 form large organs, with larger and slightly increased numbers of cells as a result of an increased period of cell proliferation and cell expansion, whereas plants overexpressing MED25 have small organs owing to decreases in both cell number and cell size. Our genetic and physiological data suggest that MED25 acts to limit cell and organ growth independently of MED25-mediated phytochrome signaling and the jasmonate pathway. Genetic analyses show that MED25 functions redundantly with DA1 to control organ growth by restricting cell proliferation. Collectively, our findings show that MED25 plays a crucial role in setting final organ size, suggesting that it constitutes an important point of regulation in plant organ size control within the transcriptional machinery.

show abstract

“…They participate in all the biological processes related to plant growth and development (Cosgrove 2000a, b;Lee et al 2003;Li et al 2003), including seed germination (Chen and Bradford 2000;Chen et al 2001), leaf organogenesis (Sloan et al 2009;Goh et al 2012;Pien et al 2001;Reinhardt et al 1998;Fleming et al 1997) and pedicle abscission (Cho and Cosgrove 2000;Reinhardt et al 1998;Park et al 2010), stem elongation (Lee and Kende 2001), penetration of pollen tubes (Li et al 2003), stomatal opening , xylem development (Im et al 2000;Gray-Mitsumune et al 2004), fruit softening and ripening (Brummell et al 1999a, b;Rose et al 1997;Hiwasa et al 2003) and root system architecture (Wu et al 1996(Wu et al , 2001Lee et al 2003).…”

Section: Introductionmentioning

confidence: 99%

OsEXPB2, a β-expansin gene, is involved in rice root system architecture

et al. 2015

View full text Add to dashboard Cite

Expansins are cell wall loosening proteins which generally play important roles as endogenous regulators in plants. Here we report a rice (Oryza sativa L.) b-expansin gene, OsEXPB2, which encodes a 28.6-kDa protein of 261 amino acids. Sequence alignment revealed that the N-terminal and C-terminal of OsEXPB2 share six discontinuous cysteine residues and four intermittent tryptophan residues, respectively. The OsEXPB2 promoter contains conserved root hair-specific elements. Subcellular localization assay revealed that OsEXPB2 was localized in the cell wall. Analysis of spatial and temporal expression patterns demonstrated that OsEXPB2 was predominantly expressed in root of rice. OsEXPB2 expression levels were up-regulated by abiotic stresses, such as phosphate or iron deficiency, and also suppressed by abscisic acid. A clear difference was observed between RNA interference (RNAi) lines and wildtype in root system architecture and plant height, and the suppression of OsEXPB2 resulted in a visible alteration of the width of the leaf blade. Anatomical analysis found that the cell size of root cortical cells in OsEXPB2-suppressed lines was significantly smaller than that of their counterparts in wild-type plants. Furthermore, cryo-scanning electron microscopy analysis showed that the development of root hair was suppressed in RNAi lines. All these results suggest that OsEXPB2 is a root-predominant gene with a key role in root-hair formation and has the potential to be utilized in transgenic root breeding to improve abiotic stress tolerance.

show abstract

Brassinosteroids control AtEXPA5 gene expression in Arabidopsis thaliana

Cited by 73 publications

References 43 publications

Physiological regulation and functional significance of shade avoidance responses to neighbors

Physiological regulation and functional significance of shade avoidance responses to neighbors

Control of final organ size by Mediator complex subunit 25 in Arabidopsis thaliana

OsEXPB2, a β-expansin gene, is involved in rice root system architecture

Contact Info

Product

Resources

About