Trade-offs between the accumulation of cuticular wax and jasmonic acid-mediated herbivory resistance in maize

Jiong Liu ¹Lu Li ²Zhilong Xiong ³Christelle A.M.Robert ⁴Baozhu Li ⁵Shan He ²Wenjie Chen ²Jiasheng Bi ²Guanqing Zhai ³Siyi Guo ⁵Hui Zhang ¹Jieping Li ¹Shutang Zhou ³Xi Zhang ³Chun-Peng Song⁵

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作者信息

1. School of Life Sciences,Henan University,Kaifeng 475004,China;State Key Laboratory of Crop Stress Adaptation and Improvement,Henan University,Kaifeng 475004,China
2. School of Life Sciences,Henan University,Kaifeng 475004,China;State Key Laboratory of Cotton Bio-Breeding and Integrated Utilization,Henan University,Kaifeng 475004,China
3. School of Life Sciences,Henan University,Kaifeng 475004,China;State Key Laboratory of Cotton Bio-Breeding and Integrated Utilization,Henan University,Kaifeng 475004,China;Sanya Institute of Henan University,Sanya 572025,China
4. Institute of Plant Sciences,University of Bern,Bern 3013,Switzerland
5. School of Life Sciences,Henan University,Kaifeng 475004,China;State Key Laboratory of Crop Stress Adaptation and Improvement,Henan University,Kaifeng 475004,China;Sanya Institute of Henan University,Sanya 572025,China
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Abstract

Plants have evolved complex physical and chemical defense systems that allow them to withstand herbivory infestation.Composed of a complex mixture of very-long-chain fatty acids(VLCFAs)and their derivatives,cuticular wax constitutes the first physical line of defense against herbivores.Here,we report the function of Glossy 8(ZmGL8),which encodes a 3-ketoacyl reductase belonging to the fatty acid elongase complex,in orchestrating wax production and jasmonic acid(JA)-mediated defenses against herbivores in maize(Zea mays).The mutation of GL8 enhanced chemical defenses by activating the JA-dependent pathway.We observed a trade-off between wax accumulation and JA levels across maize glossy mutants and 24 globally collected maize inbred lines.In addition,we demonstrated that mutants defective in cu-ticular wax biosynthesis in Arabidopsis thaliana and maize exhibit enhanced chemical defenses.Comprehensive transcriptomic and lipidomic anal-yses indicated that the gl8 mutant confers chemical resistance to herbivores by remodeling VLCFA-related lipid metabolism and subsequent JA bio-synthesis and signaling.These results suggest that VLCFA-related lipid metabolism has a critical role in regulating the trade-offs between cuticular wax and JA-mediated chemical defenses.

Key words

cuticular wax/fall armyworm/herbivore resistance/jasmonic acid/maize/plant-herbivore interactions

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基金项目

National science Foundation of China to Chun-Peng Song(U21A20206)

National Natural Science Foundation of China(32102187)

Hainan Province Joint Cultivation Project(2021JJLH0014)

Project of Sanya Yazhou Bay Science and Technology City(SCKJ-JYRC-2022-78)

Program for Innovative Research Team(in Science and Technology)in the University of Henan Province(21IRTSTHN019)

Program of Introducing Talents of Discipline to Universities 111 Project(number D16014)

Henan Province Key Research and Development Project(221111112200)

出版年

2024

植物学报(英文版)

中国植物学会

植物学报(英文版)

CSTPCDCSCD

影响因子：0.921

ISSN：1672-9072

参考文献量80

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