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Outline
INTRODUCTION: Galactinol synthase (GolS) is a key enzyme in the biosynthetic pathway of raffinose family oligosaccharides (RFOs), providing the activated galactosyl group for the biosynthesis and accumulation of RFOs in plants. It plays an important role in plant responses to abiotic stresses.
RATIONALE: Although the role of GolS in plant stress responses has been extensively studied, little is known about the molecular characteristics of the GolSgene family in Lagerstroemia indica. This study aims to identify the members of the LiGolS gene family, analyze their physicochemical properties, gene structure, and expression patterns, and explore their potential functions in salt stress response.
RESULTS: A total of 13 LiGolS gene family members were identified at the whole-genome level. These genes were unevenly distributed across 10 chromosomes. The isoelectric points of the 13 LiGolS proteins ranged from 4.75 to 9.45, with molecular weights varying from 37.69 to 46.12 kDa, and amino acid counts ranging from 327 to 404. Subcellular localization prediction revealed that six proteins were localized to chloroplasts, one to mitochondria, five to the cytoplasm, and one to vacuoles. Additionally, the number of exons in the 13 gene members ranged from 0 to 4. Expression analysis under salt stress showed that all LiGolS genes were upregulated to various degrees after salt treatment, suggesting their potential involvement in salt stress response in L. indica.
CONCLUSION: This study systematically identified and characterized the LiGolS gene family members in L. indica, including their physicochemical properties, gene structure, and expression patterns. These results lay the foundation for further functional analysis of LiGolS genes and provide theoretical insights into their roles in stress responses.
Expression patterns of LiGolS genes in Lagerstroemia indica under salt treatment
(A) Cloud and rain map of LiGolS gene expression in salt-sensitive L. indica cultivars under normal and salt treatment conditions; (B) Cloud and rain map of LiGolS gene expression in salt-tolerant L. indica cultivars under normal and salt treatment conditions; (C) LiGolS gene expression in different varieties of L. indica under normal and salt treatment conditions; (D) Heatmap of LiGolS gene expression patterns before and under salt treatment, this heatmap illustrated the log2-transformed expression levels of LiGolS genes before and after salt treatment (yellow modules indicate higher expression levels, while green modules indicate lower expression levels). M-CK and N-CK indicate salt-sensitive and salt-tolerant cultivars under normal conditions, respectively; M-T and N-T indicate salt-sensitive and salt-tolerant groups under salt treatment conditions, respectively.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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