2024
Hormone-regulated expansins: Expression, localization, and cell wall biomechanics in Arabidopsis root growth
ŠÁMALOVÁ, Markéta; Alesia MELNIKAVA; Kareem ELSAYAD; Alexis PEAUCELLE; Evelína GAHUROVÁ et al.Základní údaje
Originální název
Hormone-regulated expansins: Expression, localization, and cell wall biomechanics in Arabidopsis root growth
Autoři
ŠÁMALOVÁ, Markéta; Alesia MELNIKAVA; Kareem ELSAYAD; Alexis PEAUCELLE; Evelína GAHUROVÁ; Jaromír GUMULEC; Ioannis SPYROGLOU; Elena V ZEMLYANSKAYA; Elena V UBOGOEVA; Darina BALKOVÁ; Martin DEMKO ORCID; Nicolas BLAVET ORCID; Panagiotis ALEXIOU; Vladimir BENES; Gregory MOUILLE a Jan HEJÁTKO ORCID
Vydání
Plant Physiology, CARY, OXFORD UNIV PRESS INC, 2024, 0032-0889
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10611 Plant sciences, botany
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 6.900
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14740/24:00135141
Organizační jednotka
Středoevropský technologický institut
UT WoS
EID Scopus
Klíčová slova anglicky
GENE-EXPRESSION; ORGAN INITIATION; ALPHA-EXPANSIN; CYTOKININ; STRESS; AUXIN
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 9. 10. 2024 13:25, Mgr. Adéla Pešková
Anotace
V originále
Expansins facilitate cell expansion by mediating pH-dependent cell wall (CW) loosening. However, the role of expansins in controlling CW biomechanical properties in specific tissues and organs remains elusive. We monitored hormonal responsiveness and spatial specificity of expression and localization of expansins predicted to be the direct targets of cytokinin signaling in Arabidopsis (Arabidopsis thaliana). We found EXPANSIN1 (EXPA1) homogenously distributed throughout the CW of columella/lateral root cap, while EXPA10 and EXPA14 localized predominantly at 3-cell boundaries in the epidermis/cortex in various root zones. EXPA15 revealed cell-type-specific combination of homogenous vs. 3-cell boundaries localization. By comparing Brillouin frequency shift and AFM-measured Young's modulus, we demonstrated Brillouin light scattering (BLS) as a tool suitable for non-invasive in vivo quantitative assessment of CW viscoelasticity. Using both BLS and AFM, we showed that EXPA1 overexpression upregulated CW stiffness in the root transition zone (TZ). The dexamethasone-controlled EXPA1 overexpression induced fast changes in the transcription of numerous CW-associated genes, including several EXPAs and XYLOGLUCAN:XYLOGLUCOSYL TRANSFERASEs (XTHs), and associated with rapid pectin methylesterification determined by in situ Fourier-transform infrared spectroscopy in the root TZ. The EXPA1-induced CW remodeling is associated with the shortening of the root apical meristem, leading to root growth arrest. Based on our results, we propose that expansins control root growth by a delicate orchestration of CW biomechanical properties, possibly regulating both CW loosening and CW remodeling. Expansins control root growth by orchestrating cell wall biomechanical properties, possibly regulating cell wall stiffening and root growth arrest associated with cell wall remodeling.
Návaznosti
| EF16_019/0000738, projekt VaV |
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| GA19-24753S, projekt VaV |
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| GA22-17501S, projekt VaV |
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| LTAUSA18161, projekt VaV |
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| 90129, velká výzkumná infrastruktura |
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| 90267, velká výzkumná infrastruktura |
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