Cytokinin Plays a Multifaceted Role in -Triggered Plant Disease Development
Wang, Xiang (Northwest A&F University)
Gong, Qichang (Northwest A&F University)
Cheng, Shengyang (Northwest A&F University)
Qin, Ning (Northwest A&F University)
Cao, Tao (Northwest A&F University)
Chen, Yue (Northwest A&F University)
Wang, Dongdong (Northwest A&F University)
Valls, Marc (Centre de Recerca en Agrigenòmica)
Sánchez Coll, Núria (Centre de Recerca en Agrigenòmica)
Chen, Qin (Northwest A&F University)
Zhao, Cuizhu (Northwest A&F University)
Lu, Haibin (Northwest A&F University)

Fecha:	2024
Resumen:	Cytokinin signalling plays both positive and negative roles in plant resistance to pathogens. It is not clear whether the role of cytokinin changes at the different stages of pathogen infection. Arabidopsis thaliana sequentially exhibits distinct root morphological symptoms during Ralstonia solanacearum infection, which offers a good system to investigate function of cytokinin in the whole pathogen infection process. Using this system, we found increase of cytokinin signalling by Lonely Guy 2 (LOG2) overexpression or depletion of type-A Arabidopsis Response Regulators (ARRs), negative regulators of cytokinin signalling pathway, promoted cell death, wilting symptom and bacterial growth, but attenuated primary root growth inhibition and lateral root formation. The decrease of cytokinin signalling by mutation on Isopentenyl Transferases (IPTs) inhibited root hair formation, cell death, wilting symptom and bacterial colonisation. Application of different concentration of exogenesis 6-benzylaminopurine (6-BA) showed first promoted, then decreased root hair formation. Moreover, application of 6-BA accelerated cell death but suppressed lateral root formation and primary root growth inhibition. The diverse roles of cytokinin in these different root disease phenotypes suggested function of cytokinin during plant responses to R. solanacearum is cell type-specific, which provides new insights on roles of cytokinin signalling in regulation on plant-pathogen interactions.
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Bacterial wilt ; Cytokinin ; Plant immunity ; Root disease symptoms
Publicado en:	Molecular plant pathology, Vol. 25, Issue 12 (December 2024) , art. e70045, ISSN 1364-3703

DOI: 10.1111/mpp.70045
PMID: 39725678

9 p, 7.6 MB

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