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PCE & JAFC—南京农业大学陈法军教授团队揭示外源植物化学调控剂通过调控水稻苯丙烷代谢增强其褐飞虱抗性

  • 2026-03-19 12:38:24
PCE & JAFC—南京农业大学陈法军教授团队揭示外源植物化学调控剂通过调控水稻苯丙烷代谢增强其褐飞虱抗性

日,南京农业大学植物保护学院陈法军教授团队先后国际知名期刊《Plant, Cell & Environment》和《Journal of Agricultural and Food Chemistry》发表题为"Exogenous Inhibitors Enhance Plant Resistance to Rice Planthoppers through Boosting Phenylpropanoid Pathway under Elevated CO2"https://doi.org/10.1111/pce.70288"Exogenous Phytohormone Activators Enhance Rice Resistance to Brown Planthoppers by Boosting the Phenylpropanoid Pathway under Elevated CO2"https://doi.org/10.1021/acs.jafc.5c13685的研究论文,系统明确了外源植物化学调控剂包括:抑制剂胡椒酸piperonylic acidPA3-4-亚甲二氧基肉桂酸(3,4‐(methylenedioxy cinnamic acid, MDCA);激活剂脱落酸(abscisic acid, ABA和独角金内酯类似物(strigolactone analogue, GR24)】通过调控水稻苯丙烷代谢途径增强褐飞虱抗性的生化与分子机制,为气候变化背景下稻飞虱绿色防控提供了新策略与新方法

褐飞虱是危害水稻的重大迁飞性害虫,其刺吸为害常造成水稻重大损失。随着大气CO2浓度升高(eCO2)褐飞虱对水稻的危害加重当前亟需开发基于植物抗性调控控害新方法以应对气候变化下稻飞虱危害严重问题。苯丙烷代谢途径是植物极其重要的防御物质合成通路,其分支有两条,其一主要合成羟基苯甲酸衍生物,另一条则在肉桂酸-4-羟化酶(cinnamic acid 4-hydroxylase, C4H)和4-香豆酸-辅酶A连接酶(4-coumarate-CoA ligase, 4CL)酶催化下合成黄酮类及香豆素等物质。近期,浙江大学娄永根教授课题组研究指出,高水平的苯丙烷代谢是水稻对抗刺吸类害虫的重要防御机制(Jin et al., Plant Cell Environ, 2026.01.26 Online; https://doi.org/10.1111/pce.70401)。然而,eCO2是否影响水稻苯丙烷代谢进而影响其稻飞虱水平尚不清楚。

植物光合作用固定的碳中,约20%净流入苯丙烷代谢途径,这表明碳含量对于植物苯丙烷途径至关重要。据此推测:eCO2下水稻苯丙烷代谢可能增强,进而提高其抗虫性,但实际情况是eCO2下褐飞虱危害加重!可见,eCO2下水稻的苯丙烷代谢并未提高其抗虫性。能否利用外源植物化学调控剂调控水稻苯丙烷代谢以提高其抗虫性以应对气候变化下稻飞虱为害严重问题?基于此,开展了以下两项研究。

第一项研究发现C4H4CL酶的抑制剂PAMDCA处理水稻能显著抑制褐飞虱的取食和存活率,且这种效应eCO2下更进一步研究发现仅在eCO2PAMDCA处理导致水稻苯丙烷代谢关键酶苯丙氨酸解氨酶PAL)活性及其相关基因(PAL 1 -9中除了PAL2PAL5外其他基因)表达水平显著提高同时触发了水稻活性氧发,并激活了苯丙烷代谢途径羟基苯甲酸分支,导致羟基苯甲酸衍生物对羟基苯甲酸、儿茶、原儿茶酸、龙胆酸、没食子酸、香草酸)特异性积累1。生物测定证实,4羟基苯甲酸衍生物即焦儿茶、龙胆酸、没食子酸和香草酸)具有显著的拒食活性,能有效降低褐飞虱存活率。同时,酶活分析2和分子对接3研究表明,取食PAMDCA处理组水稻或含羟基苯甲酸衍生物人工饲料的褐飞虱解毒酶系统被激活研究结果发表在Plant Cell & Environment(图42026, 49 (2): 1138-1150https://doi.org/10.1111/pce.70288)。

1对照和高CO2浓度下PAMDCA处理对水稻羟基苯甲酸衍生物含量的影响及其与褐飞虱刺吸取食的EPG波形(N4aN4bN5)持续时间之间的Mantel检验注:(a)对羟基苯甲酸(p‐hydroxybenzoic acid);(b)焦儿茶酸(pyrocatechuic acid);(c)原儿茶酸(protocatechuic acid);(d)龙胆酸(gentisic acid);(e) 没食子酸(gallic acid);(f) 香草酸(vanillic acid);(g) Mantel检验

对照和高CO2浓度下褐飞虱取食PAMDCA处理水稻(a-d)和含羟基苯甲酸衍生物人工饲料(f-h)对虫体解毒酶活性的影响,以及水稻羟基苯甲酸衍生物含量与虫体解毒酶活性之间的Mantel检验注:(a) (f) AChE(b) (g) CarE(c) (h) GST(d)MFO(e) Mantel检验

3焦儿茶酸(a-c)、龙胆酸(b-f)、没食子酸(g-i)和香草酸(g-l)与褐飞虱解毒酶AChEadgj)、CarEbehk)和GSTcfil)的分子对接注:图中右上角数字表示最佳结合模式下的结合能大小)

4外源抑制剂(胡椒酸PA3-4-亚甲二氧基肉桂酸MDCA)通过提高水稻苯丙烷代谢中羟基苯甲酸衍生物合成来提高其在eCO2下对褐飞虱的抗性水平

第二项研究证实外源植物激素刺激剂ABAGR24处理同样能增强水稻对褐飞虱的抗性5。研究发现,ABAGR24处理导致水稻苯丙烷代谢关键酶PAL以及C4H4CL活性及其相关基因(PAL 1-4PAL6,以及C4H4CL5)表达水平的显著提高,促进呋喃香豆素类物质欧前胡素、异欧前胡素、氧化前胡素、异紫花前胡内酯、花椒毒酚、白当归脑)积累,且这种积累作用eCO2下更显著6此外,前4呋喃香豆素类物质对褐飞虱表现出显著的拒食效应,有效降低褐飞虱存活率。与一项研究一样通过酶活分析6和分子对接7结果显示,取食ABAGR24处理组水稻或含呋喃香豆素类物质人工饲料的褐飞虱,其解毒酶(AChECarEGSTMFO)活性显著增加,且前3种解毒酶均能与呋喃香豆素类物质结合。表明褐飞虱的解毒酶系统被激活研究结果发表在Journal of Agricultural and Food Chemistry(图5;见:https://doi.org/10.1021/acs.jafc.5c13685

5外源植物激素激活剂(脱落酸ABA和独角金内酯类似物GR24)通过提高水稻苯丙烷代谢中呋喃香豆素类物质合成来提高其在eCO2下对褐飞虱的抗性

6对照和高CO2浓度下ABAGR24处理对水稻呋喃香豆素类物质含量的影响及其与褐飞虱刺吸取食的EPG波形(N4aN4bN5)持续时间之间的Mantel检验注:(a)欧前胡素imperatorin);(b)异欧前胡素isoimperatorin);(c)氧化前胡素oxypeucedanin);(d)异紫花前胡内酯marmesin);(e)花椒毒酚xanthotoxol);(f)白当归脑byakangelicol);(g) Mantel检验

7对照和高CO2浓度下褐飞虱取食ABAGR24处理水稻(a-d)和含呋喃香豆素类物质人工饲料(f-h)对虫体解毒酶活性影响,以及水稻羟基苯甲酸衍生物含量与虫体解毒酶活性之间的Mantel检验注:(a) (f) AChE(b) (g) CarE(c) (h) GST(d) (i) MFO(e) Mantel检验

8水稻呋喃香豆素类物质欧前胡素a-c)、前胡素b-f)、氧化前胡素g-i)和异紫花前胡内酯g-l)与褐飞虱解毒酶AChEadgj)、CarEbehk)和GSTcfil)的分子对接(注:图中右上角数字表示最佳结合模式下的结合能大小)

以上两项研究系统构建了外源植物化学调控剂-寄主植物苯丙烷代谢调控-抗虫物质合成-植食性害虫适应性响应的完整调控网络,不仅揭示了eCO2条件下植物次生防卫植食性害虫反防御的协同进化机制,更创新性提出"靶向调控寄主植物苯丙烷代谢分支"的害虫绿色防控新思路通过设计特异性植物化学抑制剂(如PA/MDCA)或植物激素刺激剂(如ABA/GR24),定向激活特定抗虫物质合成通路PA/MDCA促进羟基苯甲酸衍生物合成;ABA/GR24促进呋喃香豆素类物质合成从而实现对植物性状的精准调控该成果为开发气候智慧型植物保护技术提供了重要理论支撑。

南京农业大学为这两篇研究论文的第一完成单位,段瑞川博士为论文第一作者,陈法军教授为论文通讯作者。以上研究得到了国家重点研发计划项目病虫害生态调控机理与应用技术研发2023YFD1400800)、国家自然科学基金项目(31871963以及江苏省研究生科研与实践创新计划项目(KYCX25_0986)等资助。

²研究论文信息如下:

1.Duan RC, Xiao XRChen FJ*. Exogenous inhibitors enhance plant resistance to rice planthoppers through boosting phenylpropanoid pathway under elevated CO2Plant Cell Environ. 2026, 49(2):1138-1150.[https://doi.org/10.1111/pce.70288]

2.Duan RC, Xiao XR, Jia YW, Ren SQChen FJ*. Exogenous Phytohormone Activators Enhance Rice Resistance to Brown Planthoppers by Boosting the Phenylpropanoid Pathway under Elevated CO2Journal of Agricultural Food Chemistry. 2026.03.04 Online [https://doi.org/10.1021/acs.jafc.5c13685]

南京农业大学陈法军教授团队在TOP期刊发表科研成果:揭示茶园间作豆科作物可提高茶叶品质并抑制害虫种群发生
南京农业大学陈法军教授团队在TOP期刊发表科研成果:揭示神经肽F(NPF)与气味结合蛋白(OBP)互作影响褐飞虱糖感受及其取食为害
南京农业大学陈法军教授团队在IJBM发表科研成果:揭示气候变化下唾液蛋白FoDESP8介导西花蓟马为害加剧的新机制
南京农业大学植保院陈法军教授团队在PPB & JEE发表科研成果:揭示大气CO₂浓度升高下褐飞虱灾变规律及其与水稻互作机理

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  1. CONNECT:[ UseTime:0.000393s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000703s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.008235s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000315s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000636s ]
  6. SELECT * FROM `set` [ RunTime:0.004755s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000903s ]
  8. SELECT * FROM `article` WHERE `id` = 500564 LIMIT 1 [ RunTime:0.000759s ]
  9. UPDATE `article` SET `lasttime` = 1776103368 WHERE `id` = 500564 [ RunTime:0.005257s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.004226s ]
  11. SELECT * FROM `article` WHERE `id` < 500564 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000556s ]
  12. SELECT * FROM `article` WHERE `id` > 500564 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006877s ]
  13. SELECT * FROM `article` WHERE `id` < 500564 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001542s ]
  14. SELECT * FROM `article` WHERE `id` < 500564 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.021466s ]
  15. SELECT * FROM `article` WHERE `id` < 500564 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003070s ]
0.129178s