Department of Entomology, University of Arkansas, Fayetteville, AR 72701, USA.
Department of Horticultural Sciences, Texas A&M AgriLife Research, Weslaco, TX 78596, USA.
Int J Mol Sci. 2018 Apr 4;19(4):1077. doi: 10.3390/ijms19041077.
The mutation in tomato (), which disrupts function of FATTY ACID DESATURASE 7 (FAD7), confers resistance to the potato aphid () and modifies the plant’s C6 volatile profiles. To investigate whether C6 volatiles play a role in resistance, (), which encodes a critical enzyme in C6 volatile synthesis, was silenced in wild-type tomato plants and mutants. Silencing in wild-type tomato increased potato aphid host preference and reproduction on 5-week old plants but had no influence on 3-week old plants. The mutation, in contrast, conferred strong aphid resistance at both 3 and 5 weeks, and silencing in did not compromise this aphid resistance. Moreover, a mutation in the gene in also conferred resistance to the green peach aphid () in a genetic background that carries a null mutation in . These results indicate that contributes to certain forms of aphid resistance in tomato, but that the effects of on aphids in tomato and Arabidopsis are distinct from and independent of .
番茄中的突变（），破坏了脂肪酸去饱和酶 7（FAD7）的功能，赋予了其对马铃薯蚜（）的抗性，并改变了植物的 C6 挥发性特征。为了研究 C6 挥发物是否在抗性中起作用，在野生型番茄植物和突变体中沉默了编码 C6 挥发性合成关键酶的（）。在野生型番茄中沉默会增加马铃薯蚜对 5 周龄植物的取食偏好和繁殖，但对 3 周龄植物没有影响。相比之下，在 3 周和 5 周时，突变赋予了强烈的抗蚜性，而在中沉默并不影响这种抗蚜性。此外，在携带基因中的突变的背景下，中的突变也赋予了对绿桃蚜（）的抗性，而在中携带 null 突变的基因。这些结果表明，在番茄中，参与了某些形式的蚜虫抗性，但在番茄和拟南芥中，对蚜虫的影响与独立于。
