Jewaria, Pawan
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
- Beijing Forestry University
- National Institute of Plant Genome Research
Sammanfattning
Defects in cell wall integrity (CWI) profoundly affect plant growth, although, underlying mechanisms are not well understood. We show that in Arabidopsis mur1 mutant, CWI defects from compromising dimerization of RG-II pectin, a key component of cell wall, attenuate the expression of auxin response factors ARF7-ARF19. As a result, polar auxin transport components are misexpressed, disrupting auxin response asymmetry, leading to defective apical hook development. Accordingly, mur1 hook defects are suppressed by enhancing ARF7 expression. In addition, expression of brassinosteroid biosynthesis genes is down-regulated in mur1 mutant, and supplementing brassinosteroid or enhancing brassinosteroid signaling suppresses mur1 hook defects. Intriguingly, brassinosteroid enhances RG-II dimerization, showing hormonal feedback to the cell wall. Our results thus reveal a previously unrecognized link between cell wall defects from reduced RG-II dimerization and growth regulation mediated via modulation of auxin-brassinosteroid pathways in early seedling development.
Publicerad i
Science Advances
2025, volym: 11, nummer: 7, artikelnummer: eads0760
Utgivare: AMER ASSOC ADVANCEMENT SCIENCE
SLU författare
Aryal, Bibek
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
Bhalerao, Rishikesh P.
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
UKÄ forskningsämne
Cellbiologi
Växtbioteknologi
Publikationens identifierare
- DOI: https://doi.org/10.1126/sciadv.ads0760
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/142511