Insect attraction versus plant defense: young leaves high in glucosinolates stimulate oviposition by a specialist herbivore despite poor larval survival due to high saponin content.
Insect attraction versus plant defense: young leaves high in glucosinolates stimulate oviposition by a specialist herbivore despite poor larval survival due to high saponin content.
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DOI：
10.1371/journal.pone.0095766
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Heckel DG
中科院分区：
文献类型：
--
作者：
Badenes-Perez FR;Gershenzon J;Heckel DG
硫代葡萄糖苷是用于植物防御的植物次生代谢物。对于专门研究十字花科的昆虫，如小菜蛾，小菜蛾(鳞翅目：小菜蛾科)，硫代葡萄糖苷作为“指纹”对寄主植物的识别是必不可少的。芦荟属(十字花科)的一些植物除了硫代葡萄糖苷外，还含有皂苷，作为小菜蛾幼虫的取食威慑物质，阻止它们在植物上生存。通过二次选择产卵试验，研究了小菜蛾在同一植株内不同大小的芒果叶上的选择性。与老叶相比，小菜蛾在幼叶上产卵较多。幼叶中硫代葡萄糖苷和皂苷的浓度高于老叶。在4周龄的植株中，真叶中存在皂苷，而子叶中几乎没有或几乎没有皂苷。当分析植物的整个叶片时，硫代葡萄糖苷和皂苷的含量在4、8和12周龄的植株之间也有显著差异。在不同树龄的藤本植物和叶片中，硫代葡萄糖苷和皂苷含量呈正相关。这项研究表明，在倒生植物中，硫代葡萄糖苷和皂苷含量的个体发育变化既影响对小菜蛾的吸引，也影响对其的抗性。硫代葡萄糖苷和皂苷高含量的硫代葡萄糖苷和皂苷在巴巴拉叶中共存，这对植物最有价值，但也是对小菜蛾最有吸引力的，这提供了对这种专业食草动物的保护，这种专门的草食动物在巴巴里亚上的产卵行为似乎是进化上的错误。
Glucosinolates are plant secondary metabolites used in plant defense. For insects specialized on Brassicaceae, such as the diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae), glucosinolates act as “fingerprints” that are essential in host plant recognition. Some plants in the genus Barbarea (Brassicaceae) contain, besides glucosinolates, saponins that act as feeding deterrents for P. xylostella larvae, preventing their survival on the plant. Two-choice oviposition tests were conducted to study the preference of P. xylostella among Barbarea leaves of different size within the same plant. P. xylostella laid more eggs per leaf area on younger leaves compared to older ones. Higher concentrations of glucosinolates and saponins were found in younger leaves than in older ones. In 4-week-old plants, saponins were present in true leaves, while cotyledons contained little or no saponins. When analyzing the whole foliage of the plant, the content of glucosinolates and saponins also varied significantly in comparisons among plants that were 4, 8, and 12 weeks old. In Barbarea plants and leaves of different ages, there was a positive correlation between glucosinolate and saponin levels. This research shows that, in Barbarea plants, ontogenetical changes in glucosinolate and saponin content affect both attraction and resistance to P. xylostella. Co-occurrence of a high content of glucosinolates and saponins in the Barbarea leaves that are most valuable for the plant, but are also the most attractive to P. xylostella, provides protection against this specialist herbivore, which oviposition behavior on Barbarea seems to be an evolutionary mistake.
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影响因子：
4.1
作者：
Badenes-Perez, Francisco R.;Reichelt, Michael;Heckel, David G.
通讯作者：
Heckel, David G.
影响因子：
2.7
作者：
HARPER, JL
通讯作者：
HARPER, JL
影响因子：
2.3
作者：
Agerbirk, N;Olsen, CE;Renwick, JAA
通讯作者：
Renwick, JAA
影响因子：
1.9
作者：
Badenes-Perez, Francisco R.;Nault, Brian A.;Shelton, Anthony M.
通讯作者：
Shelton, Anthony M.
影响因子：
3.8
作者：
Agerbirk, N;Olsen, CE;Nielsen, JK
通讯作者：
Nielsen, JK