Genome-Wide Identification of GH17s Family Genes and Biological Function Analysis of SlA6 in Tomato
Author:
Chen Da1, Zeng Zaohai1, Yu Canye1, Hu Huimin1, Lin Yuxiang12ORCID, Wu Caiyu1, Yang Yinghua1, Zhong Qiuxiang1, Zhang Xinyue1, Huang Caihong1, Yao Yiwen1, Qiu Zhengkun1ORCID, Wang Xiaomin3, Xia Rui1, Ma Chongjian4ORCID, Chen Riyuan1, Hao Yanwei1ORCID, Guan Hongling14
Affiliation:
1. Key Laboratory of Horticultural Crop Biology and Germplasm Innovation in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China 2. Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China 3. Key Laboratory of Mountain Biodiversity Conservation in Guangxi Universities, College of Biological and Pharmaceutical Sciences, Yulin Normal University, Yulin 537000, China 4. Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China
Abstract
Glycoside hydrolases (GHs), enzymes that break down glycosidic bonds in carbohydrates and between carbohydrates and non-carbohydrates, are prevalent in plants, animals, microorganisms, and other organisms. The tomato is a significant crop that contains the GH17 gene family. However, its role in tomatoes has yet to be fully investigated. In this study, we identified 43 GH17 genes from the tomato genome, distributed unevenly across 12 chromosomes. We further analyzed their gene structure, phylogenetic relationships, promoter elements, and expression patterns. The promoter element analysis indicated their potential roles in response to biotic and abiotic stresses as well as phytohormone effects on growth and development. The expression studies across different tomato tissues revealed that 10 genes were specifically expressed in floral organs, with SlA6 prominently expressed early during bud formation. By using CRISPR/Cas9 gene-editing technology, SlA6 knockout plants were generated. Phenotypic characterization showed that pollen viability, pollen tube germination, fruit weight, and seed number were significantly reduced in the Sla6 mutant, but the soluble solids content (TSS) was significantly higher in the Sla6 mutant, suggesting that SlA6 affects pollen development and fruit quality.
Funder
National Natural Science Foundation of China Natural Science Foundation of Guangxi Province Natural Science Foundation of Guangdong Province
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