生物
棉酚
分泌物
植物对草食的防御
植物
遗传学
生物化学
基因
作者
Yu‐Pei Mu,Dian-Yang Chen,Yujie Liu,Mingyu Zhu,Xian Zhang,Yin Tang,Jia‐Ling Lin,Muyang Wang,Xiao‐Xia Shangguan,Xiao‐Ya Chen,Chengshu Wang,Ying‐Bo Mao
标识
DOI:10.1016/j.molp.2024.09.008
摘要
Most coexisting insect species exhibit stunted growth compared to the single species on plants. This phenomenon reflects an interspecific antagonism that draws extensive attention while the underlying mechanisms remain largely unknown. Mirids (Apolygus lucorum) and cotton bollworms (Helicoverpa armigera) are two common pests in cotton fields. We identified a secretory protein, ASP1, from the oral secretion of mirids, which was found in the nucleus of mirid-infested cotton leaves. ASP1 specifically targets the transcriptional corepressor TOPLESS (TPL) and inhibits NINJA-mediated recruitment of TPL, thereby promoting plant defense response and gossypol accumulation in cotton glands. ASP1-enhanced defense inhibits the growth of cotton bollworms on cotton plants, while having little impact on mirids. The mesophyll-feeding characteristic allows mirids to avoid most cotton glands, thereby invalidating cotton defense. Our investigation reveals the molecular mechanism by which mirids employ cotton defense to selectively inhibit the feeding of cotton bollworms.
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