Chai Min, Zhu Xiaopei, Cui Hongxia, Jiang Chuangdao, Zhang Jinzheng, Shi Lei
Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
PLoS One. 2015 Nov 13;10(11):e0142811. doi: 10.1371/journal.pone.0142811. eCollection 2015.
As a devastating holoparasitic weed, Orobanche aegyptiaca Persoon. (Egyptian broomrape) causes serious damage to agricultural production and threatens economic development, which has raised widespread concern. The present study was conducted to determine whether lilies have the potential to be used as 'trap crops' for controlling O. aegyptiaca Persoon. In the experiments, the ability of three popular lily cultivars (Lilium Oriental hybrids 'Sorbonne', Lilium LA (Longiflorum hybrids x Asiatic hybrids) hybrids 'Ceb Dazzle', and Lilium Longiflorum hybrids (L. formosanum x L. longiflorum) 'L. formolongo') to induce O. aegyptiaca Persoon. seed germination was assessed. Parts of the three lily cultivars, including the rhizosphere soil and underground and above-ground organs, all induced "suicidal germination" of parasitic O. aegyptiaca Persoon. seed at four growth stages. Specifically, Sorbonne and Ceb Dazzle behaved with similar allelopathy, and the bulb, scale leaf and aerial stem exhibited stronger allelopathic effects on O. aegyptiaca Pers. germination compared to other organs. Aqueous L. formolongo leaf extracts may contain more stable, effective stimulants given that they induced the highest germination rate at 76.7% even though the extracts were serially diluted. We speculate that these organs may be advantageous in further isolating and purifying economical active substances that can be substitutes for GR24. These results indicate that lilies have the potential to be used as a trap crops or can be processed into green herbicide formulations that can be applied in agriculture production to rapidly deplete the seed bank of O. aegyptiaca Persoon. parasitic weeds in soil.
作为一种极具破坏性的全寄生杂草，埃及列当属植物（埃及列当）对农业生产造成严重破坏并威胁经济发展，这已引起广泛关注。本研究旨在确定百合是否有潜力用作控制埃及列当的“诱集作物”。在实验中，评估了三个常见百合品种（东方百合杂种系‘索邦’、LA杂种百合（麝香百合杂种系×亚洲百合杂种系）‘Ceb Dazzle’和麝香百合杂种系（台湾百合×麝香百合）‘福尔摩隆’）诱导埃及列当种子萌发的能力。这三个百合品种的部分，包括根际土壤以及地下和地上器官，在四个生长阶段均诱导了寄生性埃及列当种子的“自杀式萌发”。具体而言，‘索邦’和‘Ceb Dazzle’表现出相似的化感作用，与其他器官相比，鳞茎、鳞片叶和地上茎对埃及列当种子萌发表现出更强的化感作用。福尔摩隆叶片水提物可能含有更稳定、有效的刺激物，因为即使提取物进行了系列稀释，它们仍诱导出最高发芽率，达76.7%。我们推测这些器官在进一步分离和纯化可替代GR-μ的经济活性物质方面可能具有优势。这些结果表明，百合有潜力用作诱集作物，或可加工成绿色除草剂制剂，应用于农业生产以迅速耗尽土壤中埃及列当寄生杂草的种子库。
