Objective: The content of saikosaponins in genus Bupleurum is increased with numbers of lateral root, but the genetic mechanisms are largely unknown. This study aims to identify the heme oxygenase (HO) gene family members of B. chinense and B. scorzonerifolium, and assess their role in the root development in Bupleurum. Methods: The gene sequences of HO family were selected from iso-seq full-length transcriptome data of B. chinense and B. scorzonerifolium, and were analyzed in physicochemical properties, conserved domains, motifs and phylogenetic relationship. In addition, the expression patterns of HO gene in different parts of roots were compared via transcriptome sequencing and qRT-PCR in the two species. Results: Five Bupleurum HO genes (BcHO1-BcHO5) belonging to the HO1 subfamily were identified from the transcriptome data, whereas the HO2 subfamily member was not identified. The expression levels of BcHO1 and BcHO2 were significantly higher than those of other three HO members in the transcriptome analysis. In addition, the expression profile of BcHO1 showed consistency with lateral root development in B. chinense and B. scorzonerifolium. Conclusion: Hos might participate in the auxin-induced morphogenesis of lateral roots. The yield of saikosaponin may be improved by manipulating expression of these genes.
关键词:
生长素;柴胡属;血红素加氧酶;侧根形成
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This work was financially supported by China Agriculture Research System of MOF and MARA, the CAMS Innovation Fund for Medical Sciences (CIFMS) (No. 2016-I2M-2-003), Opening Project Fund of Key Laboratory of Rubber Biology and Genetic Resource Utilization, Ministry of Agriculture/State Key Laboratory Breeding Base of Cultivation & Physiology for Tropical Crops/Danzhou Investigation & Experiment Station of Tropical Crops, Ministry of Agriculture” (No. RRL-KLOF202201).
Liang Feng a,, Hua Chen a,, Jun Zhao a, Dan Liu a, c, Zhen Wei a, Yuchan Li a, Bin Yang a, Yilian He a, Meng Zhang a, Dabin Hou a,*, Ma Yu a, b,*. Auxin induces lateral root formation in Bupleurum: A heme oxygenase dependent approach[J]. Chinese Herbal Medicines (CHM),2023,15(1):57-62
