Phytohormones in Japanese Mugwort Gall Induction by a Gall-Inducing Gall Midge
Phytohormones in Japanese Mugwort Gall Induction by a Gall-Inducing Gall Midge
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DOI：
10.1271/bbb.130406
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发表时间：
2013-09-01
影响因子：
1.6
通讯作者：
Suzuki, Yoshihito
中科院分区：
文献类型：
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作者：
Tanaka, Yuichiro;Okada, Koichi;Suzuki, Yoshihito
许多昆虫种类都能在寄主植物上诱发虫瘿。液相色谱/串联质谱分析表明，瘿蚊（Rhopalomyia yomogicola），诱导虫瘿对蒿princeps含有高水平的吲哚-3-乙酸和细胞分裂素。瘿蚊幼虫也能从色氨酸合成吲哚-3-乙酸。对虫瘿组织切片的仔细观察表明，幼虫室被具有次生细胞壁的细胞层包围，次生细胞壁具有广泛的木质素沉积，除了构成摄食营养组织的虫瘿部分，其由木质素负染色的小细胞组成。这两种类型的组织之间的差异通过参与次生细胞壁合成的基因的表达分析来证实。植物激素可能起着维持虫瘿的取食部分作为新鲜营养组织的作用。与我们以前的研究结果一起，这里提出的那些表明植物激素在瘿诱导中的重要性。
A variety of insect species induce galls on host plants. Liquid chromatographic/tandem mass spectrometric analyses showed that a gall midge (Rhopalomyia yomogicola) that induces galls on Artemisia princeps contained high levels of indole-3-acetic acid and cytokinins. The gall midge larvae also synthesized indole-3-acetic acid from tryptophan. Close observation of gall tissue sections indicated that the larval chamber was surrounded by layers of cells having secondary cell walls with extensive lignin deposition, except for the part of the gall that constituted the feeding nutritive tissue which was composed of small cells negatively stained for lignin. The differences between these two types of tissue were confirmed by an expression analysis of the genes involved in the synthesis of the Secondary cell wall. Phytohormones may have functioned in maintaining the feeding part of the gall as fresh nutritive tissue. Together with the results in our previous study, those presented here suggest the importance of phytohormones in gall induction.