De Zutter Noémie, Ameye Maarten, Bekaert Boris, Verwaeren Jan, De Gelder Leen, Audenaert Kris
Laboratory of Applied Mycology and Phenomics (LAMP), Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
Laboratory of Environmental Biotechnology, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
Front Plant Sci. 2022 Mar 2;13:858804. doi: 10.3389/fpls.2022.858804. eCollection 2022.
As the awareness on the ecological impact of chemical phosphate fertilizers grows, research turns to sustainable alternatives such as the implementation of phosphate solubilizing bacteria (PSB), which make largely immobile phosphorous reserves in soils available for uptake by plants. In this review, we introduce the mechanisms by which plants facilitate P-uptake and illustrate how PSB improve the bioavailability of this nutrient. Next, the effectiveness of PSB on increasing plant biomass and P-uptake is assessed using a meta-analysis approach. Our review demonstrates that improved P-uptake does not always translate in improved plant height and biomass. We show that the effect of PSB on plants does not provide an added benefit when using bacterial consortia compared to single strains. Moreover, the commonly reported species for P-solubilization, spp. and spp., are outperformed by the scarcely implemented spp. Despite the similar responses to PSB in monocots and eudicots, species responsiveness to PSB varies within both clades. Remarkably, the meta-analysis challenges the common belief that PSB are less effective under field conditions compared to greenhouse conditions. This review provides innovative insights and identifies key questions for future research on PSB to promote their implementation in agriculture.
随着人们对化学磷肥生态影响的认识不断提高，研究转向可持续替代方案，例如实施解磷细菌（PSB），它能使土壤中大量难以移动的磷储备可供植物吸收。在本综述中，我们介绍了植物促进磷吸收的机制，并阐述了解磷细菌如何提高这种养分的生物有效性。接下来，我们使用荟萃分析方法评估了解磷细菌在增加植物生物量和磷吸收方面的有效性。我们的综述表明，磷吸收的改善并不总是转化为植物高度和生物量的增加。我们发现，与单一菌株相比，使用细菌联合体时，解磷细菌对植物的作用并没有额外的益处。此外，常见的解磷物种，如 spp. 和 spp.，表现不如很少使用的 spp.。尽管单子叶植物和双子叶植物对解磷细菌的反应相似，但两个分支内不同物种对解磷细菌的反应存在差异。值得注意的是，荟萃分析对普遍认为解磷细菌在田间条件下比在温室条件下效果差的观点提出了挑战。本综述提供了创新见解，并确定了未来解磷细菌研究的关键问题，以促进其在农业中的应用。
