Fuyun Hou1,2, Taifeng Du1, Zhen Qin2, Tao Xu1, Aixian Li2, Shunxu Dong2, Daifu Ma1, Zongyun Li3, Qingmei Wang2, Liming Zhang4,5. 1. Key laboratory of phylogeny and comparative genomics of the Jiangsu province, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, China. 2. Crop research institute, Shandong Academy of Agricultural Sciences/ Scientific Observing and Experimental Station of Tuber and Root Crops in Huang-Huai-Hai Region, Ministry of Agriculture and Rural Affairs, Jinan, 250100, China. 3. Key laboratory of phylogeny and comparative genomics of the Jiangsu province, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, China. zongyunli@jsnu.edu.cn. 4. Key laboratory of phylogeny and comparative genomics of the Jiangsu province, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, China. zhanglm11@sina.com. 5. Crop research institute, Shandong Academy of Agricultural Sciences/ Scientific Observing and Experimental Station of Tuber and Root Crops in Huang-Huai-Hai Region, Ministry of Agriculture and Rural Affairs, Jinan, 250100, China. zhanglm11@sina.com.
Abstract
BACKGROUND: Sweetpotato (Ipomoea batatas (L.) Lam.) serves as an important food source for human beings. β-galactosidase (bgal) is a glycosyl hydrolase involved in cell wall modification, which plays essential roles in plant development and environmental stress adaptation. However, the function of bgal genes in sweetpotato remains unclear. RESULTS: In this study, 17 β-galactosidase genes (Ibbgal) were identified in sweetpotato, which were classified into seven subfamilies using interspecific phylogenetic and comparative analysis. The promoter regions of Ibbgals harbored several stress, hormone and light responsive cis-acting elements. Quantitative real-time PCR results displayed that Ibbgal genes had the distinct expression patterns across different tissues and varieties. Moreover, the expression profiles under various hormonal treatments, abiotic and biotic stresses were highly divergent in leaves and root. CONCLUSIONS: Taken together, these findings suggested that Ibbgals might play an important role in plant development and stress responses, which provided evidences for further study of bgal function and sweetpotato breeding.
BACKGROUND: Sweetpotato (Ipomoea batatas (L.) Lam.) serves as an important food source for human beings. β-galactosidase (bgal) is a glycosyl hydrolase involved in cell wall modification, which plays essential roles in plant development and environmental stress adaptation. However, the function of bgal genes in sweetpotato remains unclear. RESULTS: In this study, 17 β-galactosidase genes (Ibbgal) were identified in sweetpotato, which were classified into seven subfamilies using interspecific phylogenetic and comparative analysis. The promoter regions of Ibbgals harbored several stress, hormone and light responsive cis-acting elements. Quantitative real-time PCR results displayed that Ibbgal genes had the distinct expression patterns across different tissues and varieties. Moreover, the expression profiles under various hormonal treatments, abiotic and biotic stresses were highly divergent in leaves and root. CONCLUSIONS: Taken together, these findings suggested that Ibbgals might play an important role in plant development and stress responses, which provided evidences for further study of bgal function and sweetpotato breeding.