Silencing Onion Lachrymatory Factor Synthase Causes a Significant Change in the Sulfur Secondary Metabolite Profile
作者:Colin C. Eady、Takahiro Kamoi、Masahiro Kato、Noel G. Porter、Sheree Davis、Martin Shaw、Akiko Kamoi、Shinsuke Imai
DOI:10.1104/pp.108.123273
日期:2008.8.4
single genetic transformation in onion (Allium cepa), a crop recalcitrant to genetic transformation, we suppressed the lachrymatory factor synthase gene using RNA interference silencing in six plants. This reduced lachrymatory synthase activity by up to 1,544-fold, so that when wounded the onions produced significantly reduced levels of tear-inducing lachrymatory factor. We then confirmed, through a novel
通过对洋葱 (Allium cepa) 的单一遗传转化,我们在六株植物中使用 RNA 干扰沉默抑制了催泪因子合酶基因。这将催泪合成酶的活性降低了 1,544 倍,因此当洋葱受伤时,产生的催泪催泪因子的水平显着降低。然后,我们通过一种新的比色测定证实,这种沉默已经改变了反式-S-1-丙烯基-l-半胱氨酸亚砜分解途径,因此更多的 1-丙烯基次磺酸转化为二-1-丙烯基硫代亚磺酸盐。这种硫代亚磺酸盐水平升高的结果是非酶法生产的兹维伯烷异构体和其他挥发性硫化合物、二-1-丙烯基二硫化物和2-巯基-3,4-二甲基-2的下游生产显着增加,3-二氢噻吩,以前曾报道过痕量或未在洋葱中检测到。讨论了这种同时下调和上调次级硫产物对洋葱健康和风味属性的影响。