The REPLUMLESS Transcription Factor Controls the Expression of the RECEPTOR-LIKE CYTOPLASMIC KINASE VI_A2 Gene Involved in Shoot and Fruit Patterning of Arabidopsis thaliana

被引:0
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作者
Kenesi, Erzsebet [1 ]
Beothy-Feher, Orsolya [1 ,2 ]
Szollosi, Reka [3 ]
Domonkos, Ildiko [1 ]
Valkai, Ildiko [1 ]
Feher, Attila [1 ,3 ]
机构
[1] Inst Plant Biol, HUN REN Biol Res Ctr, H-6726 Szeged, Hungary
[2] Univ Szeged, Fac Sci & Informat, Doctoral Sch Biol, H-6726 Szeged, Hungary
[3] Univ Szeged, Fac Sci & Informat, Dept Plant Biol, H-6726 Szeged, Hungary
关键词
phyllotaxis; replum; stem thickness; BELLRINGER transcription factor; vascular bundles; ROP GTPase-activated kinase; HOMEODOMAIN PROTEIN; HOMEOBOX GENES; POUND-FOOLISH; REGULATORY NETWORKS; APICAL MERISTEM; POWDERY MILDEW; PENNYWISE; BREVIPEDICELLUS; REPRESSION; KINASES;
D O I
10.3390/ijms25148001
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The promoter of the RECEPTOR-LIKE CYTOPLASMIC KINASE VI_A2 (RLCK VI_A2) gene contains nine binding sites for the REPLUMLESS (RPL) transcription factor. In agreement, the expression of the kinase gene was strongly downregulated in the rpl-4 mutant. Comparing phenotypes of loss-of-function mutants, it was revealed that both genes are involved in stem growth, phyllotaxis, organization of the vascular tissues, and the replum, highlighting potential functional interactions. The expression of the RLCKVI_A2 gene from the constitutive 35S promoter could not complement the rpl-4 phenotypes but exhibited a dominant positive effect on stem growth and affected vascular differentiation and organization. The results also indicated that the number of vascular bundles is regulated independently from stem thickness. Although our study cannot demonstrate a direct link between the RPL and RLVKVI_A2 genes, it highlights the significance of the proper developmental regulation of the RLCKVI_A2 promoter for balanced stem development.
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页数:13
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