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Cheng Y, Zhou Y, Li C, Jin J. Cloning and functional analysis of the juvenile hormone receptor gene CsMet in Coccinella septempunctata. JOURNAL OF INSECT SCIENCE (ONLINE) 2024; 24:2. [PMID: 38958929 PMCID: PMC11221319 DOI: 10.1093/jisesa/ieae065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 05/10/2024] [Accepted: 06/04/2024] [Indexed: 07/04/2024]
Abstract
The potential role of the juvenile hormone receptor gene (methoprene-tolerant, Met) in reproduction of Coccinella septempunctata L. (Coleoptera: Coccinellidae)(Coleoptera: Coccinellidae), was investigated by cloning, analyzing expression profiles by quantitative real-time PCR, and via RNA interference (RNAi). CsMet encoded a 1518-bp open reading frames with a predicted protein product of 505 amino acids; the latter contained 2 Per-Arnt-Sim repeat profile at amino acid residues 30-83 and 102-175. CsMet was expressed in different C. septempunctata larvae developmental stages and was most highly expressed in third instar. CsMet expression in female adults gradually increased from 20 to 30 d, and expression levels at 25 and 30 d were significantly higher than levels at 1-15 d. CsMet expression in 20-d-old male adults was significantly higher than in males aged 1-15 d. CsMet expression levels in fat body tissues of male and female adults were significantly higher than expression in the head, thorax, and reproductive system. At 5 and 10 d after CsMet-dsRNA injection, CsMet expression was significantly lower than the controls by 75.05% and 58.38%, respectively. Ovary development and vitellogenesis in C. septempunctata injected with CsMet-dsRNA were significantly delayed and fewer mature eggs were produced. This study provides valuable information for the large-scale rearing of C. septempunctata.
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Affiliation(s)
- Ying Cheng
- Insect Research Group, Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guiyang, China
| | - Yuhang Zhou
- Insect Research Group, Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guiyang, China
| | - Cao Li
- Insect Research Group, Guizhou Provincial Pollution-free Engineering Center of Plant Protection, Guiyang, China
| | - Jianxue Jin
- Insect Research Group, Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guiyang, China
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Cheng Y, Zhou Y, Li F. Cloning and spatio-temporal expression of CsKr-h1 encoding the juvenile hormone response gene in Coccinella septempunctata L. BULLETIN OF ENTOMOLOGICAL RESEARCH 2024; 114:99-106. [PMID: 38178801 DOI: 10.1017/s0007485323000652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
The gene encoding juvenile hormone response (Krüppel homolog1, Kr-hl) in Coccinella septempunctata was investigated by cloning and analysing expression profiles in different developmental stages and tissues by quantitative real-time polymerase chain reaction (PCR). C. septempunctata Kr-hl (CsKr-hl) encoded a 1338 bp open reading frame (ORF) with a predicted protein product of 445 amino acids; the latter showed high similarity to orthologs in other species and contained eight highly-conserved Zn-finger motifs for DNA-binding. CsKr-hl was expressed in different developmental stages of C. septempunctata. The expression levels of CsKr-hl in eggs, 2nd, 3rd, 4th instar larvae, and pupa were 3.31, 2.30, 7.09, 0.58, and 7.48 times the number of 1st instar larvae, respectively. CsKr-hl expression levels in female adults gradually increased at 25-30 days and were significantly higher than expression at 1-20 days. CsKr-hl expression in 20-30 days-old male adults was significantly higher than males aged 1-15 days. CsKr-hl expression levels in heads of male and female adults were significantly higher than expression levels in the thorax, adipose, and reproductive system. Interestingly, CsKr-hl expression levels in the adipose and reproductive system of female adults were significantly higher than in adult male corresponding organs, which suggest that CsKr-hl plays an important role in regulating reproductive development in C. septempunctata.
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Affiliation(s)
- Ying Cheng
- Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guizhou, Guiyang 550006, China
| | - Yuhang Zhou
- Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guizhou, Guiyang 550006, China
| | - Fengliang Li
- Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guizhou, Guiyang 550006, China
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Cheng Y, Yu Y, Li W, Li F. Influence of artificial diets on biological characteristics and digestive enzymes of Coccinella septempunctata L. JOURNAL OF INSECT SCIENCE (ONLINE) 2023; 23:7190095. [PMID: 37279520 DOI: 10.1093/jisesa/iead022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 02/11/2023] [Accepted: 03/31/2023] [Indexed: 06/08/2023]
Abstract
In order to improve the rearing of Coccinella septempunctata L. (Coleoptera: Coccinellidae), nutrients such as shrimp, pollen, honey, and lard were added to the basic artificial diet, and the effects of the artificial diet on biological parameters and digestive enzymes were evaluated. The results show that beetles feeding on the supplemented diet exhibited pupation, emergence, fecundity, and hatching rates that were 102.69%, 125.02%, 162.33%, and 119.90% of those supplied with the basic diet, respectively. The addition of shrimp and pollen to the basal diet improved protease, trypsin, chymotrypsin, and aminopeptidase activity in larvae and female adults. The addition of lard improved lipase activity in female adults, and the addition of honey improved invertase activity in adults of both sexes. This study provides guidance for improving the nutritional benefits of ladybug artificial diets.
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Affiliation(s)
- Ying Cheng
- Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guizhou, Guiyang 550006, China
| | - Yi Yu
- Institute of Entomology, Guizhou University/Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Guizhou, Guiyang 550025, China
| | - Wenhong Li
- Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guizhou, Guiyang 550006, China
| | - Fengliang Li
- Institute of Plant Protection, Guizhou Provincial Academy of Agricultural Sciences, Guizhou, Guiyang 550006, China
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Ali S, Peng J, Liang JF, Huang C, Xie YH, Wang X. Changes in life history parameters and transcriptome profile of Serangium japonicum associated with feeding on natural prey (Bemisia tabaci) and alternate host (Corcyra cephalonica eggs). BMC Genomics 2023; 24:112. [PMID: 36918764 PMCID: PMC10015737 DOI: 10.1186/s12864-023-09182-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 02/13/2023] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND The mass production of natural predators with prolonged shelf life is a prerequisite for their field application as pest control agents. The traditional methods used for the mass production of Serangium japonicum rely heavily on the consistent supply of natural prey. This study explains the effects of B. tabaci (natural prey) and C. cephalonica eggs (alternative food) on life history and transcriptome profile of S. japanicum. METHODS This study compares the effects of B. tabaci (natural prey) and C. cephalonica eggs (alternative food) on biology, reproduction, and predatory efficacy, and transcriptome profile of S. japanicum. RESULTS This study revealed that S. japonicum was able to successfully complete its life cycle while feeding on B. tabaci (natural prey) and C. cephalonica eggs (alternative food). The C. cephalonica eggs fed S. japonicum individuals had longer developmental period and lower fecundity as compared to those feeding on whitefly but the survival rates (3rd instar nymphs, 4th instar nymphs and pupae) and predatory efficacy of C. cephalonica eggs fed S. japonicum individuals were significantly similar to to those feeding on whitefly.Transcriptome analysis showed that when faced with dietary changes, S. japanicum could successfully feed on C. cephalonica eggs by regulating genes related to nutrient transport, metabolism, and detoxification. Moreover, S. japanicum degraded excess cellular components through ribosomal autophagy and apoptosis, which provided sufficient materials and energy for survival and basic metabolism. CONCLUSION Corcyra cephalonica eggs can be used as an alternate host for the predator, Serangium japonicum, as the survival rates and predatory efficacy of the predator are similar to those feeding on the natural host (B.tabaci). When faced with dietary changes, S. japanicum could successfully feed on C. cephalonica eggs as revealed by upregulation of genes related to nutrient transport, metabolism, and detoxification. These findings are of great significance for studying the functional evolution of S. japonicum in response to dietary changes.
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Affiliation(s)
- Shaukat Ali
- Guangdong Laboratory for Lingnan Modern Agriculture,College of Plant Protection, South China Agricultural University, 510642, Guangzhou, P. R. China.,Engineering Research Center of Biological Control, Ministry of Education and Guangdong Province, South China Agricultural University, 510642, Guangzhou, China
| | - Jing Peng
- Guangdong Laboratory for Lingnan Modern Agriculture,College of Plant Protection, South China Agricultural University, 510642, Guangzhou, P. R. China.,Engineering Research Center of Biological Control, Ministry of Education and Guangdong Province, South China Agricultural University, 510642, Guangzhou, China
| | - Jian-Feng Liang
- Guangdong Laboratory for Lingnan Modern Agriculture,College of Plant Protection, South China Agricultural University, 510642, Guangzhou, P. R. China.,Engineering Research Center of Biological Control, Ministry of Education and Guangdong Province, South China Agricultural University, 510642, Guangzhou, China
| | - Chuyang Huang
- Guangdong Laboratory for Lingnan Modern Agriculture,College of Plant Protection, South China Agricultural University, 510642, Guangzhou, P. R. China.,Engineering Research Center of Biological Control, Ministry of Education and Guangdong Province, South China Agricultural University, 510642, Guangzhou, China
| | - Yong-Hui Xie
- Kunming Branch of Yunnan Provincial Tobacco Company, 650021, Kunming, China.
| | - Xingmin Wang
- Guangdong Laboratory for Lingnan Modern Agriculture,College of Plant Protection, South China Agricultural University, 510642, Guangzhou, P. R. China. .,Engineering Research Center of Biological Control, Ministry of Education and Guangdong Province, South China Agricultural University, 510642, Guangzhou, China.
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