Analysis of the Arabidopsis coilin mutant reveals a positive role of AtCOILIN in plant immunity

Aala A. Abulfaraj, Hanna M. Alhoraibi, Kiruthiga Mariappan, Jean Bigeard, Huoming Zhang, Marilia Almeida-Trapp, Olga Artyukh, Fatimah Abdulhakim, Sabiha Parween, Delphine Pflieger, Ikram Blilou, Heribert Hirt*, Naganand Rayapuram*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Biogenesis of ribonucleoproteins occurs in dynamic subnuclear compartments called Cajal bodies (CBs). COILIN is a critical scaffolding component essential for CB formation, composition, and activity. We recently showed that Arabidopsis (Arabidopsis thaliana) AtCOILIN is phosphorylated in response to bacterial elicitor treatment. Here, we further investigated the role of AtCOILIN in plant innate immunity. Atcoilin mutants are compromised in defense responses to bacterial pathogens. Besides confirming a role of AtCOILIN in alternative splicing (AS), Atcoilin showed differential expression of genes that are distinct from those of AS, including factors involved in RNA biogenesis, metabolism, plant immunity, and phytohormones. Atcoilin mutant plants have reduced levels of defense phytohormones. As expected, the mutant plants were more sensitive to the necrotrophic fungal pathogen Botrytis cinerea. Our findings reveal an important role for AtCOILIN in innate plant immunity.

Original languageEnglish (US)
Pages (from-to)745-761
Number of pages17
Issue number1
StatePublished - Sep 2022

Bibliographical note

Funding Information:
This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) to Prof. Heribert Hirt No. BAS/1/1062-01-01.

Publisher Copyright:
© The Author(s) 2022. Published by Oxford University Press on behalf of American Society of Plant Biologists.

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science


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