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园艺学报 ›› 2025, Vol. 52 ›› Issue (4): 933-946.doi: 10.16420/j.issn.0513-353x.2024-0376

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

基于激素、转录组和代谢组研究木棉皮刺的遗传调控

邵一帆1,朱宝庆1,王童欣1,廖建和2,吴繁花3,杨思怡1,冯建行1,于旭东1,*(yuxd@hainanu.edu.cn)   

  1. 1海南大学热带农林学院,热带特色林木花卉遗传与种质创新教育部重点实验室,海南省热带特色花木资源生物学重点实验室,海南儋州 571737 2海南大学材料科学与工程学院,海口 570228 3海南大学生命科学学院,海口 570228
  • 收稿日期:2025-01-08 修回日期:2025-02-20 出版日期:2025-04-25 发布日期:2025-04-25
  • 通讯作者: *E-mail:yuxd@hainanu.edu.cn
  • 基金资助:
    海南省重点研发计划项目(ZDYF2021SHFZ258);海南省重大科技计划项目(ZDKJ2021018)

Research of Genetic Regulation of Bombax ceiba Prickle Based on Hormone,Transcriptome and Metabolome

SHAO Yifan1,ZHU Baoqing1,WANG Tongxin1,LIAO Jianhe2,WU Fanhua3,YANG Siyi1,FENG Jianhang1,and YU Xudong1,*(yuxd@hainanu.edu.cn)   

  1. 1Key Laboratory of Genetics and Germplasm Innovation of Tropical Forest Trees and Ornamental Plants(Ministry of Education);Key Laboratory of Germplasm Resources Biology of Tropical Special Ornamental Plants of Hainan ProvinceSchool of Tropical Agriculture and Forestry, Hainan UniversityDanzhouHainan 571737,China 2School of Materials Science and EngineeringHainan UniversityHaikou 570228China 3College of life sciencesHainan UniversityHaikou 570228,China
  • Received:2025-01-08 Revised:2025-02-20 Published:2025-04-25 Online:2025-04-25

摘要: 以木棉(Bombax ceiba)上部少刺区和基部多刺区茎皮为材料,通过植物激素测定、转录组学和代谢组学等方法,探究木棉皮刺形成的关键调控基因。激素测定发现,少刺区茎皮脱落酸、茉莉酸和水杨酸含量高于多刺区,而多刺区赤霉素含量高于少刺区。转录组测序发现,在有刺区,生长素生物合成通路中,Aux/IAA蛋白基因和生长素响应因子ARF基因的表达高于无刺区;细胞分裂素生物合成通路中 B-ARR基因表达高于无刺区;在无刺区,赤霉素生物合成通路中,GID1DELLATF基因的表达高于有刺区;茉莉酸生物合成通路中,JAR1JAZMYC2基因的表达高于有刺区。通过qRT-PCR验证了13个(BRI1BZR1/2AUX1AUX/IAAARFDELLAJAR1TGAPR-1SIMKKMYB62MYB123WRKY28)影响木棉皮刺发育的关键基因,与高通量测序结果一致,表明RNA-Seq结果可靠。代谢组学筛选出了2 187个代谢物和92个差异代谢物,确定苯丙素生物合成通路中的CCRCOMT基因以及类黄酮生物合成途径中FLS基因与木棉皮刺形成有关;缬氨酸、亮氨酸和异亮氨酸的代谢通路中,代谢物(2S)-2–异丙基苹果酸和(2R,3S)-3–异丙基苹果酸以及类黄酮生物合成途径中的槲皮素参与木棉皮刺形成。

关键词: 木棉, 皮刺, 植物激素, 转录组, 代谢组

Abstract: Key regulatory genes that create prickles in Bombax ceiba were explored via phytohormone assays,transcriptomics,and metabolomics by use of the stem bark from the upper less prickly zone and lower prickly zone. The phytohormone assay revealed that abscisic acid,jasmonic acid,and salicylic acid were higher in the less prickly zone than in the prickly zone,whereas gibberellin was higher in the more prickly zone than in the less prickly zone. Transcriptome sequencing revealed that in the growth hormone biosynthesis pathway,the expression of Aux/IAA protein genes and growth hormone response factor ARF genes was higher in the prickly zone than in the less prickly zone. In the cytokinin biosynthesis pathway,the expression of B-ARR genes was higher in the prickly zone than in the less prickly zone whereas,in the gibberellin biosynthesis pathway,the expression of the GID1DELLA,and TF genes was higher in the less prickly zone than in the prickly area. Furthermore,the expression of the JAR1JAZ,and MYC2 genes was higher in the less prickly zone than in the prickly zone in the jasmonic acid biosynthesis pathway. Overall,13 key genes(BRI1BZR1/2AUX1AUX/IAAARFDELLAJAR1TGAPR-1SIMKKMYB62MYB123,and WRKY28) that affected the development of cottonwood prickles were verified by qRT-PCR,which were similar to the results of high-throughput sequencing;thus,supporting the reliability of the RNA-Seq results. Metabolomics screened 2 187 metabolites and 92 differential metabolites and identified that the CCR and COMT genes in the phenylpropanoid biosynthesis pathway as well as FLS genes in the flavonoid biosynthesis pathway, were related to the formation of cottonwood prickles. In addition,the metabolites(2S)-2-isopropylmalic acid and (2R,3S)-3-isopropyl malate in the valine,leucine,and isoleucine metabolic pathways and quercetin in the flavonoid biosynthesis pathway are involved in cottonwood prickle formation.

Key words: Bombax ceiba, prickle, plant hormones, transcriptome, metabolome

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