Abstract：
Sweetpotato (Ipomoea batatas L.) is regarded as amongst the world\'s most important crops for food, vegetable, forage, and raw material for starch and alcohol production. Since pest attack and disease infection are the main limiting aspects frequently causing the yield loss and quality degradation of sweetpotato, it is a great demand to develop the effective defense strategies for maintaining productivity. In the past decade, many studies have focused on dynamic analysis at the physiological, biochemical, and molecular responses of sweetpotatoes to environmental challenges. This review offers an overview of the defense mechanisms against biotic stresses in sweetpotato observed so far, particularly insect herbivory and pathogen infections. The defenses of sweetpotato include the regulation of the toxic and anti-digestive proteins, plant-derived compounds, physical barrier formation, and sugar distribution. Ipomoelin and sporamin have been extensively researched for the defense against herbivore wounding. Herbivory-induced plant volatiles, chlorogenic acid, and latex phytochemicals play important roles in defenses for insect herbivory. Induction of IbSWEET10 reduces sugar content to mediate F. oxysporum resistance. Therefore, these researches provide the genetic strategies for improving resistance bioengineering and breeding of sweetpotato crops and future prospects for research in this field.
摘要：
甘薯（IpomoeabatatasL.）被认为是世界上最重要的粮食作物，蔬菜,牧草,以及淀粉和酒精生产的原料。由于虫害和疾病感染是经常导致甘薯产量损失和质量下降的主要限制因素，制定有效的防御策略以保持生产力是一个巨大的需求。在过去的十年里,许多研究都集中在生理动态分析，生物化学，和甘薯对环境挑战的分子反应。这篇综述概述了迄今为止观察到的甘薯对生物胁迫的防御机制，特别是昆虫草食动物和病原体感染。甘薯的防御包括调节有毒和抗消化蛋白，植物衍生化合物，物理屏障形成，和糖的分布。Ipomoelin和sporamin已被广泛研究用于预防草食动物受伤。食草诱导的植物挥发物，绿原酸,和乳胶植物化学物质在昆虫草食动物的防御中起重要作用。IbSWEET10的诱导降低糖含量以介导尖孢酵母抗性。因此,这些研究为提高甘薯作物抗性的生物工程和育种提供了遗传策略，并对该领域的未来研究进行了展望。
