α-Xylosidase plays essential roles in xyloglucan remodelling, maintenance of cell wall integrity, and seed germination in<i>Arabidopsis thaliana</i>

Shigeyama, Takuma; Watanabe, Asuka; Tokuchi, Konatsu; Toh, Shigeo; Sakurai, Naoki; Shibuya, Naoto; Kawakami, Naoto

doi:10.1093/jxb/erw321

Cited by 46 publications

(40 citation statements)

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“…The broad expression of XLY1 in the embryo and the endosperm during seed development and imbibition was shown in the former study using the XYL1 promoter (3 kb) (Sechet et al ). In contrast, the latter study showed that the promoter (∼2 kb) activity was enriched in the radicle tip and the upper hypocotyl of the embryo in 24 h‐imbibed seeds, with only low activity detected in the lower hypocotyl and the transition zone between the radicle tip and hypocotyl (Shigeyama et al ) (Figure A). The reason for this discrepancy is not known.…”

Section: Seed Germinationmentioning

confidence: 88%

“…In the trg1‐1 ( xyl1 mutant) seeds imbibed at 34 °C, the expression of the two ABA biosynthesis genes ZEAXANTHIN EPOXYDASE ( ZEP ) and NINE‐CIS‐EPOXYCAROTENOID DIOXYGENASE9 ( NCED9 ) is reduced as compared to WT, resulting in a decrease in ABA levels. In contrast, the expression of GA3ox‐1 , a rate‐limiting GA biosynthesis gene, is enhanced in the trg1‐1 seeds imbibed at 22 °C (Shigeyama et al ). These results suggest that alteration of the cell wall properties could affect the ABA‐GA balance in seeds.…”

Section: Seed Germinationmentioning

confidence: 99%

“…Efficient trimming of XGOs by XYL1 enhances the production of highly branched XGOs, which increase the complexity of XyG and the resistance of the endospermic cell walls, thereby suppressing germination. Based on Nonogaki et al 1998;Cavalier et al 2008;Scheller and Ulvskov 2010;Ravachol et al 2016;Sechet et al 2016;Shigeyama et al 2016. properties of the cell walls and possibly the resistance of ME against the radicle.…”

Section: Seed Germinationmentioning

confidence: 99%

“…While PME inhibitors (PMEI) reduce PME activity in seeds, overexpression of PMEI5 in Arabidopsis promoted germination through unknown (pink question mark) mechanisms. Based on Dubreucq et al 2000;Wakabayashi et al 2003;Levin 2005;Francis et al 2006;Wolf et al 2012;Muller et al 2013;Sechet et al 2016;Shigeyama et al 2016. See text for details.…”

Section: Figure 2 Continuedmentioning

confidence: 99%

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Seed germination and dormancy: The classic story, new puzzles, and evolution

Nonogaki¹

2019

JIPB

117

125

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This review highlights recent progresses in seed germination and dormancy research. Research on the weakening of the endosperm during germination, which is almost a classic theme in seed biology, was resumed by α‐xylosidase studies. Strong genetic evidence was presented to suggest that the quality control of xyloglucan biosynthesis in the endosperm (and the embryo) plays a critical role in germination. Further analyses on the endosperm and the adjacent layers have suggested that the cutin coat in the endosperm‐testa interphase negatively affects germination while the endosperm‐embryo interphase produces a sheath that facilitates germination. These progresses significantly advanced our understanding of seed germination mechanisms. A breakthrough in dormancy research, on the other hand, revealed the unique abscisic acid signaling pathway that is regulated by DELAY OF GERMINATION1 (DOG1). The detailed analysis of DOG1 expression uncovered the intriguing story of reciprocal regulation of the sense‐antisense pair, which generated new questions. Recent studies also suggested that the DOG1 function is not limited to dormancy but extended through general seed maturation, which provokes questions about the evolution of DOG1 family proteins. Seed biology is becoming more exciting with the classic stories being revitalized and new puzzles emerging from the frontier.

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Section: Seed Germinationmentioning

confidence: 88%

Section: Seed Germinationmentioning

confidence: 99%

Section: Seed Germinationmentioning

confidence: 99%

Section: Figure 2 Continuedmentioning

confidence: 99%

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Seed germination and dormancy: The classic story, new puzzles, and evolution

Nonogaki¹

2019

JIPB

117

125

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“…An α‐xylosidase TGR1/XYL1 has been identified that could finely tune the levels of xyloglucan oligosaccharides and their action on the mechanical properties of the CW. The expression of the TGR1/XYL1 gene is high in growing tissues such as the root tip and the upper hypocotyl, but relatively low in the elongating cells in the embryo of the germinating seed (Shigeyama et al ., ).…”

Section: Developmentmentioning

confidence: 97%

Cell wall traits that influence plant development, immunity, and bioconversion

et al. 2019

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Summary The architecture of the plant cell wall is highly dynamic, being substantially re‐modeled during growth and development. Cell walls determine the size and shape of cells and contribute to the functional specialization of tissues and organs. Beyond the physiological dynamics, the wall structure undergoes changes upon biotic or abiotic stresses. In this review several cell wall traits, mainly related to pectin, one of the major matrix components, will be discussed in relation to plant development, immunity and industrial bioconversion of biomass, especially for energy production. Plant cell walls are a source of oligosaccharide fragments with a signaling function for both development and immunity. Sensing cell wall damage, sometimes through the perception of released damage‐associated molecular patterns (DAMPs), is crucial for some developmental and immunity responses. Methodological advances that are expected to deepen our knowledge of cell wall (CW) biology will also be presented.

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Analysis of Carbohydrates and Glycoconjugates by Matrix‐assisted Laser Desorption/Ionization Mass Spectrometry: An Update for 2015–2016

Harvey

2021

Mass Spectrometry Reviews

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This review is the ninth update of the original article published in 1999 on the application of matrix‐assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2016. Also included are papers that describe methods appropriate to analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation and arrays. The second part of the review is devoted to applications to various structural types such as oligo‐ and poly‐saccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis. The reported work shows increasing use of combined new techniques such as ion mobility and the enormous impact that MALDI imaging is having. MALDI, although invented over 30 years ago is still an ideal technique for carbohydrate analysis and advancements in the technique and range of applications show no sign of deminishing. © 2020 Wiley Periodicals, Inc.

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α-Xylosidase plays essential roles in xyloglucan remodelling, maintenance of cell wall integrity, and seed germination inArabidopsis thaliana

Abstract: HighlightXyloglucan oligosaccharide metabolism by α-xylosidase impacts xyloglucan remodelling, the mechanical integrity of the primary cell wall of growing tissues, cell expansion, and seed germination.

Cited by 46 publications

References 65 publications

Seed germination and dormancy: The classic story, new puzzles, and evolution

Seed germination and dormancy: The classic story, new puzzles, and evolution

Cell wall traits that influence plant development, immunity, and bioconversion

Analysis of Carbohydrates and Glycoconjugates by Matrix‐assisted Laser Desorption/Ionization Mass Spectrometry: An Update for 2015–2016

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