Neotropical maize genotypes with different levels of benzoxazinoids affect fall armyworm development
Plants are equipped with various defensive attributes against herbivores, including volatile and nonvolatile compounds. In maize plants, benzoxazinoids mediate resistance against some herbivores, with the most abundant being (2R)‐2‐β‐D‐glucopyranosyloxy‐4‐hydroxy‐7‐methoxy‐2H‐1,4‐benzoxazin−3(4H)‐on...
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| Published in: | Physiological entomology Vol. 47; no. 4; pp. 232 - 241 |
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| Main Authors: | , , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Oxford, UK
The Royal Entomological Society
01-12-2022
Wiley Subscription Services, Inc |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Plants are equipped with various defensive attributes against herbivores, including volatile and nonvolatile compounds. In maize plants, benzoxazinoids mediate resistance against some herbivores, with the most abundant being (2R)‐2‐β‐D‐glucopyranosyloxy‐4‐hydroxy‐7‐methoxy‐2H‐1,4‐benzoxazin−3(4H)‐one (DIMBOA‐Glc), and its corresponding aglucone 2,4‐dihydroxy‐7‐methoxy‐2H‐1,4‐benzoxazin‐3(4H)‐one (DIMBOA). Both compounds have been shown to interfere in the larval development of generalist herbivores but are less effective on specialist, that is, grass‐feeding, herbivores. Using a Brazilian population of Spodoptera frugiperda, we investigated (i) the level of constitutive benzoxazinoids in Neotropical maize genotypes, that is, Zapalote Chico, Mirt 2A, Sintético Spodoptera, L3, BRS 4103 and BRS 1040 (ii) the effect of S. frugiperda herbivory on benzoxazinoid levels in these genotypes and (iii) the impact of the genotypes on the development of S. frugiperda larvae. The results showed that the six maize genotypes produce different levels of benzoxazinoids, with Mirt 2A and BRS 1040 producing constitutively higher levels of HDMBOA‐Glc and DIMBOA‐Glc respectively compared to the other genotypes. When feeding on BRS 1040 and Mirt 2A, S. frugiperda larvae took an additional week to pupate, but this effect does not affect larval survival, what was the same and high on all the genotypes (>70%). Furthermore, production of DIMBOA‐Glc and HDMBOA‐Glc in these genotypes was suppressed, suggesting that S. frugiperda larvae can alter maize defence plant responses. In summary, our results demonstrate that Neotropical maize genotypes produce varying levels of benzoxazinoids, genotypes respond differently to S. frugiperda herbivory and S. frugiperda is able to cope with secondary metabolite‐based defence in Neotropical maize.
When feeding on BRS 1040 and Mirt 2A, S. frugiperda larvae took an additional week to pupate, but this effect do not affect larval survival.
Production of DIMBOA‐Glc and HDMBOA‐Glc in BRS 1040 and Mirt 2A was suppressed, suggesting that S. frugiperda larvae can alter maize defence plant responses.
S. frugiperda is able to cope with secondary metabolic‐based defence in Neotropical maize |
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| Bibliography: | Funding information Biotechnology and Biological Sciences Research Council, Grant/Award Number: BBS/OS/CP/000001; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Grant/Award Number: 88881.1317661/2014‐01; Empresa Brasileira de Pesquisa Agropecuária, Grant/Award Number: 2018040040004 |
| ISSN: | 0307-6962 1365-3032 |
| DOI: | 10.1111/phen.12392 |