Jamil Muhammad, Wang Jian You, Yonli Djibril, Ota Tsuyoshi, Berqdar Lamis, Traore Hamidou, Margueritte Ouedraogo, Zwanenburg Binne, Asami Tadao, Al-Babili Salim
The BioActives Lab, Center for Desert Agriculture, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Institut de l'Environnement et de Recherches Agricoles (INERA), Ouagadougou 04 BP 8645, Burkina Faso.
Plants (Basel). 2022 Apr 12;11(8):1045. doi: 10.3390/plants11081045.
The obligate hemiparasite is one of the major global biotic threats to agriculture in sub-Saharan Africa, causing severe yield losses of cereals. The germination of seeds relies on host-released signaling molecules, mainly strigolactones (SLs). This dependency opens up the possibility of deploying SL analogs as "suicidal germination agents" to reduce the accumulated seed bank of in infested soils. Although several synthetic SL analogs have been developed for this purpose, the utility of these compounds in realizing the suicidal germination strategy for combating is still largely unknown. Here, we evaluated the efficacy of three potent SL analogs (MP3, MP16, and Nijmegen-1) under laboratory, greenhouse, and farmer's field conditions. All investigated analogs showed around a 50% germination rate, equivalent to a 50% reduction in infestation, which was comparable to the standard SL analog GR24. Importantly, MP16 had the maximum reduction of emergence (97%) in the greenhouse experiment, while Nijmegen-1 appeared to be a promising candidate under field conditions, with a 43% and 60% reduction of emergence in pearl millet and sorghum fields, respectively. These findings confirm that the selected SL analogs appear to make promising candidates as simple suicidal agents both under laboratory and real African field conditions, which may support us to improve suicidal germination technology to deplete the seed bank in African agriculture.
专性半寄生植物是撒哈拉以南非洲农业面临的主要全球生物威胁之一，会导致谷物严重减产。种子的萌发依赖于宿主释放的信号分子，主要是独脚金内酯（SLs）。这种依赖性使得有可能将SL类似物作为“自杀性萌发剂”来减少受侵染土壤中累积的种子库。尽管已经为此目的开发了几种合成SL类似物，但这些化合物在实现对抗[此处原文可能有缺失信息]的自杀性萌发策略中的效用仍然很大程度上未知。在此，我们在实验室、温室和农田条件下评估了三种有效的SL类似物（MP3、MP16和奈梅亨-1）的功效。所有研究的类似物都显示出约50%的萌发率，相当于侵染减少50%，这与标准SL类似物GR24相当。重要的是，在温室实验中MP16对[此处原文可能有缺失信息]出苗的减少率最高（97%），而奈梅亨-1在田间条件下似乎是一个有前景的候选物，在珍珠粟和高粱田中[此处原文可能有缺失信息]出苗分别减少43%和60%。这些发现证实，所选的SL类似物在实验室和真实的非洲田间条件下似乎都是有前景的简单自杀剂候选物，这可能支持我们改进自杀性萌发技术以耗尽非洲农业中的[此处原文可能有缺失信息]种子库。
