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The Crop Journal | 郑州大学李付广团队揭示GhADC2正调控棉纤维伸长

  • 2026-03-31 09:24:37
The Crop Journal | 郑州大学李付广团队揭示GhADC2正调控棉纤维伸长

棉花(Gossypium spp.)是全球最重要的天然纺织纤维作物之一,其纤维广泛应用于服装、医疗及工业领域。棉纤维来源于胚珠表皮细胞,是一种高度特化的单细胞结构,其长度和品质直接决定棉花的经济价值。因此,系统解析棉纤维发育的分子调控机制,一直是棉花遗传改良和分子育种研究中的重要科学问题。已有研究表明,棉纤维发育过程受到多种转录因子、激素信号及代谢途径的精细调控,但与细胞伸长密切相关的多胺代谢在棉纤维发育中的作用及其调控网络仍缺乏系统认识。

近日,郑州大学李付广团队The Crop Journal在线发表了题为“GhMYB2-activated GhADC2 interacts with GhBCCP1 to regulate cotton fiber development的研究论文。该研究聚焦多胺生物合成途径中的关键限速酶——精氨酸脱羧酶(arginine decarboxylaseADC),从遗传功能、转录调控及蛋白互作等层面系统解析了棉花 GhADC2在纤维发育中的作用机制,为深入理解棉纤维伸长的分子调控过程以及纤维品质改良提供了新的理论依据和候选基因资源。

研究人员通过遗传关系分析发现,GhADC2过表达植株的纤维伸长显著增强,而RNAi抑制GhADC2表达则导致纤维长度明显降低,表明GhADC2在棉纤维伸长过程中发挥正向调控作用。进一步的分子机制分析显示,转录因子GhMYB2能够激活GhADC2启动子的转录活性,提示GhADC2GhMYB2的转录调控。亚细胞定位结果表明,GhADC2主要定位于细胞核,该定位特征不同于部分已报道定位于叶绿体的 ADC 蛋白,提示 GhADC2在棉纤维细胞中可能具有不同于经典 ADC 的作用方式(图1)。 

预测的GhMYB2结合位点及GhADC2的亚细胞定位

通过酵母文库筛选,研究鉴定到GhADC2可与GhBCCP1发生相互作用(图2)。GhBCCP1是一种定位于细胞核的蛋白,参与乙酰辅酶A转化为马隆酸辅酶A的催化过程,与植物代谢调控密切相关。GhADC2GhBCCP1的互作,为多胺代谢与碳代谢在棉纤维发育中的协同作用提供了新的分子线索。同时,代谢组学分析显示,在GhADC2过表达和RNAi材料中,色氨酸代谢和黄酮生物合成等通路显著富集,提示GhADC2可能通过影响多胺相关代谢网络,并与多种代谢途径协同作用,从而参与棉纤维伸长过程的调控。

GhADC2互作蛋白的筛选与验证

综合上述结果,研究提出GhMYB2GhADC2GhBCCP1可能共同构成一个调控模块,参与棉纤维发育过程中转录调控与代谢调控的协同作用(图3)。该研究加深了对棉纤维发育分子机制的认识,并为棉花纤维品质改良和分子育种研究提供了新的理论依据和基因资源。

GhADC2控棉花纤维的

作者和基金项目

郑州大学农业与生物制造学院硕士研究生张丽君原野为该文共同第一作者,郑州大学李付广教授、中国农业科学院都市农业研究所任茂智研究员和中国农业科学院棉花研究所默辉娟副研究员为共同通信作者。该研究得到国家重点研发计划项目(2022YFF10014002020YFA0908004)、河南省重点科技项目(252102311054)、新疆揭榜挂帅基金(KY2024JBGS01)以及棉花标准化生产基地数字赋能示范与推广项目(NTFW-2024-18)资助。

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The Crop Journal (《作物学报(英文版)》)是中国科协主管,中国作物学会、中国农业科学院作物科学研究所和中国科技出版传媒股份有限公司共同主办的学术期刊,创刊于2013年10月。办刊宗旨为刊载作物科学相关领域最新成果,开展国际学术交流,促进我国作物科学研究水平及国际影响力的提升。主要刊登作物遗传与育种、作物基因组与分子育种、作物驯化与重要种质资源进化、作物分子生理与生态、作物栽培与耕作系统、作物与微生物互作、作物与环境互作及其适应性、作物基因组进化与选择、作物重要农艺性状发育、生物技术/工具/大数据等领域以第一手资料撰写的研究论文、研究简报以及专题综述等。2024年The Crop Journal的SCI影响因子为5.6,在JCR农学和植物学两个学科位于Q1区,并位列中科院分区农林类期刊一区。2019–2023年获中国科技期刊卓越行动计划重点项目资助,2024–2028年获中国科技期刊卓越行动计划二期英文梯队项目资助。

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  1. CONNECT:[ UseTime:0.000949s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001625s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000700s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000678s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001380s ]
  6. SELECT * FROM `set` [ RunTime:0.006042s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001546s ]
  8. SELECT * FROM `article` WHERE `id` = 488198 LIMIT 1 [ RunTime:0.008552s ]
  9. UPDATE `article` SET `lasttime` = 1775696238 WHERE `id` = 488198 [ RunTime:0.006493s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000729s ]
  11. SELECT * FROM `article` WHERE `id` < 488198 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001102s ]
  12. SELECT * FROM `article` WHERE `id` > 488198 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001119s ]
  13. SELECT * FROM `article` WHERE `id` < 488198 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003808s ]
  14. SELECT * FROM `article` WHERE `id` < 488198 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006895s ]
  15. SELECT * FROM `article` WHERE `id` < 488198 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002869s ]
0.135161s