Ethan Bass, Daniel M. Mutyambai, Charles A. O. Midega, Zeyaur R. Khan, André Kessler
{"title":"玉米抗性和次生代谢与苔草属植物间作的关联效应","authors":"Ethan Bass, Daniel M. Mutyambai, Charles A. O. Midega, Zeyaur R. Khan, André Kessler","doi":"10.1007/s10886-024-01470-5","DOIUrl":null,"url":null,"abstract":"<p>Intercropping is drawing increasing attention as a strategy to increase crop yields and manage pest pressure, however the mechanisms of associational resistance in diversified cropping systems remain controversial. We conducted a controlled experiment to assess the impact of co-planting with silverleaf Desmodium (<i>Desmodium uncinatum</i>) on maize secondary metabolism and resistance to herbivory by the spotted stemborer (<i>Chilo partellus</i>). Maize plants were grown either in the same pot with a <i>Desmodium</i> plant or adjacent to it in a separate pot. Our findings indicate that co-planting with <i>Desmodium</i> influences maize secondary metabolism and herbivore resistance through both above and below-ground mechanisms. Maize growing in the same pot with a <i>Desmodium</i> neighbor was less attractive for oviposition by spotted stemborer adults. However, maize exposed only to above-ground <i>Desmodium</i> cues generally showed increased susceptibility to spotted stemborer herbivory (through both increased oviposition and larval consumption). VOC emissions and tissue secondary metabolite titers were also altered in maize plants exposed to <i>Desmodium</i> cues, with stronger effects being observed when maize and <i>Desmodium</i> shared the same pot. Specifically, benzoxazinoids were strongly suppressed in maize roots by direct contact with a <i>Desmodium</i> neighbor while headspace emissions of short-chain aldehydes and alkylbenzenes were increased. These results imply that direct root contact or soil-borne cues play an important role in mediating associational effects on plant resistance in this system.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Associational Effects of Desmodium Intercropping on Maize Resistance and Secondary Metabolism\",\"authors\":\"Ethan Bass, Daniel M. Mutyambai, Charles A. O. Midega, Zeyaur R. Khan, André Kessler\",\"doi\":\"10.1007/s10886-024-01470-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Intercropping is drawing increasing attention as a strategy to increase crop yields and manage pest pressure, however the mechanisms of associational resistance in diversified cropping systems remain controversial. We conducted a controlled experiment to assess the impact of co-planting with silverleaf Desmodium (<i>Desmodium uncinatum</i>) on maize secondary metabolism and resistance to herbivory by the spotted stemborer (<i>Chilo partellus</i>). Maize plants were grown either in the same pot with a <i>Desmodium</i> plant or adjacent to it in a separate pot. Our findings indicate that co-planting with <i>Desmodium</i> influences maize secondary metabolism and herbivore resistance through both above and below-ground mechanisms. Maize growing in the same pot with a <i>Desmodium</i> neighbor was less attractive for oviposition by spotted stemborer adults. However, maize exposed only to above-ground <i>Desmodium</i> cues generally showed increased susceptibility to spotted stemborer herbivory (through both increased oviposition and larval consumption). VOC emissions and tissue secondary metabolite titers were also altered in maize plants exposed to <i>Desmodium</i> cues, with stronger effects being observed when maize and <i>Desmodium</i> shared the same pot. Specifically, benzoxazinoids were strongly suppressed in maize roots by direct contact with a <i>Desmodium</i> neighbor while headspace emissions of short-chain aldehydes and alkylbenzenes were increased. These results imply that direct root contact or soil-borne cues play an important role in mediating associational effects on plant resistance in this system.</p>\",\"PeriodicalId\":15346,\"journal\":{\"name\":\"Journal of Chemical Ecology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2024-02-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Chemical Ecology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1007/s10886-024-01470-5\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Ecology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s10886-024-01470-5","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
Associational Effects of Desmodium Intercropping on Maize Resistance and Secondary Metabolism
Intercropping is drawing increasing attention as a strategy to increase crop yields and manage pest pressure, however the mechanisms of associational resistance in diversified cropping systems remain controversial. We conducted a controlled experiment to assess the impact of co-planting with silverleaf Desmodium (Desmodium uncinatum) on maize secondary metabolism and resistance to herbivory by the spotted stemborer (Chilo partellus). Maize plants were grown either in the same pot with a Desmodium plant or adjacent to it in a separate pot. Our findings indicate that co-planting with Desmodium influences maize secondary metabolism and herbivore resistance through both above and below-ground mechanisms. Maize growing in the same pot with a Desmodium neighbor was less attractive for oviposition by spotted stemborer adults. However, maize exposed only to above-ground Desmodium cues generally showed increased susceptibility to spotted stemborer herbivory (through both increased oviposition and larval consumption). VOC emissions and tissue secondary metabolite titers were also altered in maize plants exposed to Desmodium cues, with stronger effects being observed when maize and Desmodium shared the same pot. Specifically, benzoxazinoids were strongly suppressed in maize roots by direct contact with a Desmodium neighbor while headspace emissions of short-chain aldehydes and alkylbenzenes were increased. These results imply that direct root contact or soil-borne cues play an important role in mediating associational effects on plant resistance in this system.
期刊介绍:
Journal of Chemical Ecology is devoted to promoting an ecological understanding of the origin, function, and significance of natural chemicals that mediate interactions within and between organisms. Such relationships, often adaptively important, comprise the oldest of communication systems in terrestrial and aquatic environments. With recent advances in methodology for elucidating structures of the chemical compounds involved, a strong interdisciplinary association has developed between chemists and biologists which should accelerate understanding of these interactions in nature.
Scientific contributions, including review articles, are welcome from either members or nonmembers of the International Society of Chemical Ecology. Manuscripts must be in English and may include original research in biological and/or chemical aspects of chemical ecology. They may include substantive observations of interactions in nature, the elucidation of the chemical compounds involved, the mechanisms of their production and reception, and the translation of such basic information into survey and control protocols. Sufficient biological and chemical detail should be given to substantiate conclusions and to permit results to be evaluated and reproduced.