玉米叶片次生物质含量及相关基因表达与其对草地贪夜蛾抗性的关系

doi:10.3864/j.issn.0578-1752.2026.08.007

Abstract

Abstract:

【Objective】This study aims to explore the relationship between the resistance of maize (Zea mays) to Spodoptera frugiperda and the content of secondary metabolites (ferulic acid, caffeic acid, chlorogenic acid and DIMBOA) in leaves, as well as the gene expression of key enzymes ZmPALs and ZmBXs in their synthesis pathways, so as to provide theoretical guidance for the breeding of insect-resistant maize varieties.【Method】The resistance difference of six maize varieties cultivated in Shaanxi Province to S. frugiperda was evaluated by using artificial insect inoculation at maize whorl stage and leaf-feeding methods, with plant damage ratings, and development and reproduction parameters of S. frugiperda after feeding as indicators. Contents of three phenolic acids and DIMBOA were determined by colorimetry and high-performance liquid chromatography (HPLC), respectively. Real-time quantitative PCR (RT-qPCR) was used to determine mRNA expression levels of ZmPAL6, ZmPAL7, ZmBX10, and ZmBX11 in maize leaves of different varieties at 0, 6, and 18 h after infestation. And then, the relationships between secondary metabolite contents and resistance indicators measured were studied by correlation analysis.【Result】Among the maize varieties tested, Zhengdan958, Qinlong14 and Shanke16 showed less damage, with mean ratings lower than 4.20 at 7-14 d after S. frugiperda infestation, while Zhengda12, Jiyuan1 and Dedan123 suffered the heaviest damage, with ratings from 4.31 to 7.22. Moreover, S. frugiperda larvae and pupae had the fastest development and significantly greater weight; adults had significantly longer lifespan and oviposition duration, as well as higher fecundity on Zhengda12 and Jiyuan1 compared to other varieties. By contrast, the slowest larvae development, significantly lower larval and pupal weight, longer adult preoviposition period lifespan, shorter oviposition duration and lower fecundity occurred on Zhengdan958, followed by Qinlong14 and Shanke16. Correlation analysis results showed that contents of chlorogenic acid, ferulic acid and caffeic acid in maize leaves showed significantly negative correlation with plant damage rating and larval weight of S. frugiperda, and significantly positive correlation with larval developmental period. In addition, chlorogenic acid content exhibited significantly negative correlation with pupal weight. DIMBOA content had significantly negative correlation with plant damage rating. The expressions of ZmPAL6, ZmPAL7, ZmBX10 and ZmBX11 were significantly induced by larval feeding. Whether non-infested or 6 and 18 h after infested plants, the expression levels of these four genes in Zhengdan958 and Qinlong14 were significantly higher than those in Jiyuan1 and Zhengda12.【Conclusion】Maize varieties Zhengdan958, Qinlong14 and Shanke16 planted in Shaanxi Province exhibit certain resistance to damage and growth and development of S. frugiperda, and their resistance is closely related to the contents of three phenolic acids and DIMBOA as well as the expression levels of ZmPALs and ZmBXs in leaves.

Key words: Spodoptera frugiperda, maize variety, resistance, secondary metabolite, gene expression

ZHAO SiJie, REN JiaXin, NAN JiangLei, WANG XingYun, CHENG WeiNing. Relationships Between Secondary Metabolite Contents and Related Gene Expression in Maize Leaves and Their Resistance to Spodoptera frugiperda[J].Scientia Agricultura Sinica, 2026, 59(8): 1686-1696.

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引物名称Primer name	正向引物Forward primer (5°-3°)	反向引物Reverse primer (5°-3°)
ZmPAL6	GATCGGCAAGCTCATGTTCG	CCCTTGAAGCCGTAGTCCAG
ZmPAL7	AGGGTCTTGCGATGGTGAA	TGGGTCAGGTGGTCAGTGTA
ZmBx10	CGTAAACGCCTTGCTGAACA	ACCACCGACGTCAACCAA
ZmBx11	ACCCTTCTCCAGATCCTCGC	GTCAACCTGTAGACGACGACA
ZmGADPH	AAACTGCCTTGCTCCCCTT	GAAGAACTTTACCAACAGCCTTG

发育阶段 Developmental stage	正大12 Zhengda12	纪元1号 Jiyuan1	德单123 Dedan123	陕科16 Shanke16	秦龙14 Qinlong14	郑单958 Zhengdan958
幼虫Larva	13.01±0.11d	13.22±0.09d	14.30±0.18c	16.68±0.30b	17.58±0.35a	17.60±0.06a
预蛹Prepupa	1.06±0.02c	0.96±0.03d	1.28±0.11a	1.13±0.03bc	1.16±0.06b	1.14±0.05bc
蛹Pupa	7.93±0.16c	7.56±0.13c	9.08±0.20b	11.14±0.20a	10.95±0.14a	9.21±0.25b
雌成虫Female adult	16.50±0.84a	16.73±0.79a	13.23±0.84b	13.28±0.94b	11.36±1.00c	13.45±0.78b
雄成虫Male adult	16.87±0.66a	17.26±0.81a	11.40±0.51c	11.46±0.44c	11.34±0.48c	13.36±0.45b

玉米品种Maize variety	产卵前期Preoviposition period (d)	产卵期Oviposition duration (d)	单雌产卵量Fecundity
纪元1号Jiyuan1	1.17±0.23c	6.33±0.57a	1152.83±137.80a
正大12 Zhengda12	1.22±0.18c	6.38±0.57a	1145.63±106.01a
秦龙14 Qinlong14	1.50±0.23b	5.27±0.38b	1069.45±91.12a
德单123 Dedan123	1.63±0.22b	5.23±0.21b	1009.00±89.31a
陕科16 Shanke16	1.67±0.22b	5.10±0.62b	1016.00±123.94a
郑单958 Zhengdan958	2.88±0.52a	4.25±0.75c	910.75±160.61b

生物学指标 Biological indicator	阿魏酸Ferulic acid		咖啡酸Caffeic acid		绿原酸Chlorogenic acid		丁布DIMBOA
生物学指标 Biological indicator	r	P	r	P	r	P	r	P
7 d受害等级7 d Damage rating	-0.879*	0.021	-0.870*	0.024	-0.950**	0.004	-0.879*	0.021
14 d受害等级14 d Damage rating	-0.911*	0.012	-0.896*	0.016	-0.975**	0.002	-0.777	0.069
幼虫历期Larval duration	0.859*	0.028	0.839*	0.037	0.956**	0.003	0.771	0.072
幼虫体重Larval weight	-0.840*	0.036	-0.827*	0.042	-0.918*	0.010	-0.706	0.117
蛹重Pupal weight	-0.743	0.056	-0.706	0.076	-0.899**	0.007	-0.602	0.153
单雌产卵量Fecundity	-0.392	0.493	-0.319	0.538	-0.623	0.187	-0.803	0.054

Relationships Between Secondary Metabolite Contents and Related Gene Expression in Maize Leaves and Their Resistance to Spodoptera frugiperda

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