Identification and analysis of ovate family proteins in Camellia oleifera
Ovate family proteins(OFPs),part of which are related with fruit shape,are a class of plant-specific transcription factors.Investigation of OFPs is helpful to promote the fruit height and yield of Camellia oleifera.Based on the date of genome,transcriptome and single-cell RNA-seq data,identification and analysis of OFPs were conducted in C.oleifera using bioinformatic approaches.A total of 37 CoOFP genes were identified in the genome data of C.oleifera,and the 37 CoOFP proteins were divided into 4 subfamilies and 7 groups according to the topology of phylogenetic tree.Group Ⅱ-1,Ⅲ-1 and Ⅳ-1 contained 3,4 and 11 CoOFP proteins,which were homologues of BnOFP13_2,SlOFP20 and OVATE,respectively.The results of transcriptome expression profiling showed that CoOFP26 of group Ⅲ-1 expressed in flower bud,pistil,stamen,anther,seed,pericarp and root.CoOFP26 were also detected in placenta(clusters 4 and 11)of mature ovaries.Both of CoOFP23 and CoOFP29 of group Ⅳ-1 mainly expressed in flower bud,pistil,stamen,anther,seed and pericarp.CoOFP23 was detected in carpel inner layer(clusters 1 and 8)of mature ovaries.CoOFP29 was also detected in cluster 1.CoOFP26 may be involved in regulation of cell proliferation of placenta and pericarp along proximo-distal axis.Both of CoOFP23 and CoOFP29 may be involved in regulation of cell proliferation of carpel and pericarp along proximo-distal axis.CoOFP23,CoOFP26 and CoOFP29 may be the key genes for regulating the fruit height of C.oleifera.