Phenolics, rather than glucosinolates, mediate host choice of Bemisia tabaci MEAM1 and MED on five cabbage genotypes
Phenolics, rather than glucosinolates, mediate host choice of Bemisia tabaci MEAM1 and MED on five cabbage genotypes
复制标题
酚类物质而非芥子油苷介导烟粉虱 MEAM1 和 MED 对五种甘蓝基因型的宿主选择
DOI：
10.1111/jen.12737
复制
发表时间：
2020-01-27
影响因子：
1.9
通讯作者：
Jiao，Xiaoguo
中科院分区：
文献类型：
--
作者：
Yang，Jinjian;Xie，Wen;Jiao，Xiaoguo
烟粉虱（Bemisia tabaci（Gennadius））（半翅目：粉虱科）在世界范围内最重要的两个隐种是MEAM 1（Middle East-Asia Minor 1，“B”型）和MED（Mediterranean，“Q”型）。虽然bothB。tabaciMEAM 1和MED是多食性的，在寄主选择和对不同寄主植物的表现上有很大差异。例如，MEAM 1在卷心菜（甘蓝）上比MED更喜欢沉降和表现更好，但其潜在机制在很大程度上尚未探索。本研究首先测定了5个甘蓝基因型的主要次生抗虫物质（硫代葡萄糖苷和酚类物质）和主要营养成分（可溶性蛋白、总氨基酸和总氮）的含量。然后，我们研究了MEAM 1和MED的5个甘蓝基因型上的定居和产卵选择。MEAM 1和MED的沉降和产卵偏好与总酚含量呈负相关，而不是硫代葡萄糖苷或主要营养物质的含量。MEAM 1比MED更能准确地对甘蓝基因型的寄主质量进行排序，这至少部分地说明了总酚类物质而不是硫代葡萄糖苷介导了甘蓝对寄主的选择。tabaciMEAM 1和MED在5个甘蓝基因型上的表达差异。
Worldwide, the most two important cryptic species ofBemisia tabaci(Gennadius) (Hemiptera: Aleyrodidae) are MEAM1 (Middle East–Asia Minor 1, “B” biotype) and MED (Mediterranean, “Q” biotype). Although bothB. tabaciMEAM1 and MED are polyphagous, they differ greatly in host choice and performance on various host plants. MEAM1 prefer to settle and perform better than MED on cabbage (Brassica oleracea), for example, but the underlying mechanism is largely unexplored. In the present study, we first measured the contents of the main secondary insect‐resistant substances (glucosinolates and phenolics) and main nutrients (soluble proteins, total amino acids and total nitrogen) in five cabbage genotypes. We then examined the settling and oviposition choices of MEAM1 and MED on the five cabbage genotypes, respectively. The settling and oviposition preferences of both MEAM1 and MED were negatively related to the content of total phenolics rather than to the content of glucosinolates or main nutrients. Furthermore, our results showed that MEAM1 ranked the host quality of the cabbage genotypes more accurately than MED. The results at least in part indicate that total phenolics rather than glucosinolates mediate the host choice ofB. tabaciMEAM1 and MED on the five cabbage genotypes.