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Identification of MYB and MYC Transcription Factors Regulating the Latex-specific Expression of HbCPT7 in Hevea brasiliensis
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Miaomiao ZHOU1, 2, Xiaomei LUO1, Yiqing YANG1, Kaiye LIU1, 2, Shengmin ZHANG1, 2, Jiyan QI1, 2, Chaorong TANG1, 2, Jie CAO1, 2, *
Chinese Journal of Tropical Crops | 2025, 46(6) : 1288 - 1296
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Chinese Journal of Tropical Crops | 2025, 46(6): 1288-1296
• Omics & Biotechnology •
Identification of MYB and MYC Transcription Factors Regulating the Latex-specific Expression of HbCPT7 in Hevea brasiliensis
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Miaomiao ZHOU1, 2, Xiaomei LUO1, Yiqing YANG1, Kaiye LIU1, 2, Shengmin ZHANG1, 2, Jiyan QI1, 2, Chaorong TANG1, 2, Jie CAO1, 2, *
Affiliations
  • 1.School of Tropical Agriculture and Forestry (Agriculture and Rural College, Rural Revitalization College), Hainan University / Natural Rubber Provincial and Ministerial Collaborative Innovation Center, Haikou, Hainan 570028, China
  • 2.School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, Hainan 572025, China
Published: 2025-06-25 doi: 10.3969/j.issn.1000-2561.2025.06.002
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Natural rubber is a key and widely used industrial raw material, which is mainly produced from Hevea brasiliensis. Cis-prenyltransferase (CPT) is an important component of natural rubber biosynthesis in laticiferous cells. It has been reported that HbCPT7 and HbCPT8 are specifically and highly expressed in latex, which is the cytoplasm of laticifers, and HblMYB19 and HblMYB44 can significantly promote the expression of HbCPT8 in tobacco and yeast. However, the transcription factors that regulate the specific expression of HbCPT7 in latex are still not clear. Here, we found there are several MYB- and MYC-binding sites located in promoter region of HbCPT7. We totally identified 226 HbMYBs and 19 HbMYCs in Hevea by using a genome-wide scanning approach. The transcriptome data showed that HbMYB1, HbMYB2, HbMYC1, HbMYC2, HbMYC3, HbMYC4 and HbMYC5 were highly expressed in latex. HbMYB1, HbMYB2, HbMYC1, HbMYC4 and HbMYC5 were successfully cloned from the latex of rubber trees. Through yeast one-hybrid assays, it was discovered that HbMYC5 could bind to the promoter regions of 1–1000 bp and 1501–1971 bp upstream of the start codon of HbCPT7. The results would provide a new insight into the molecular mechanism of HbCPT7 in regulating natural rubber biosynthesis.

rubber tree  /  HbCPT7  /  HbMYC  /  HbMYB
Miaomiao ZHOU, Xiaomei LUO, Yiqing YANG, Kaiye LIU, Shengmin ZHANG, Jiyan QI, Chaorong TANG, Jie CAO. Identification of MYB and MYC Transcription Factors Regulating the Latex-specific Expression of HbCPT7 in Hevea brasiliensis[J]. Chinese Journal of Tropical Crops, 2025 , 46 (6) : 1288 -1296 . DOI: 10.3969/j.issn.1000-2561.2025.06.002
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Year 2025 volume 46 Issue 6
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Article Info
doi: 10.3969/j.issn.1000-2561.2025.06.002
  • Receive Date：2024-12-27
  • Online Date：2026-06-24
  • Published：2025-06-25
Article Data
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History
  • Received：2024-12-27
  • Accepted：2025-02-24
Funding
Affiliations
    1.School of Tropical Agriculture and Forestry (Agriculture and Rural College, Rural Revitalization College), Hainan University / Natural Rubber Provincial and Ministerial Collaborative Innovation Center, Haikou, Hainan 570028, China
    2.School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, Hainan 572025, China
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表12种不同金属材料的力学参数
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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