College of Resources and Environment, Southwest University, Chongqing 400716, China.
Division of Research and Innovation, Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Science, Chennai 602105, Tamil Nadu, India.
Sci Total Environ. 2024 Jan 10;907:167774. doi: 10.1016/j.scitotenv.2023.167774. Epub 2023 Oct 15.
Biofilm formation represents a pivotal and adaptable trait among microorganisms within natural environments. This attribute plays a multifaceted role across diverse contexts, including environmental, aquatic, industrial, and medical systems. While previous research has primarily focused on the adverse impacts of biofilms, harnessing their potential effectively could confer substantial advantages to humanity. In the face of escalating environmental pressures (e.g., drought, salinity, extreme temperatures, and heavy metal pollution), which jeopardize global crop yields, enhancing crop stress tolerance becomes a paramount endeavor for restoring sufficient food production. Recently, biofilm-forming plant growth-promoting bacteria (PGPB) have emerged as promising candidates for agricultural application. These biofilms are evidence of microorganism colonization on plant roots. Their remarkable stress resilience empowers crops to thrive and yield even in harsh conditions. This is accomplished through increased root colonization, improved soil properties, and the synthesis of valuable secondary metabolites (e.g., ACC deaminase, acetin, 2,3-butanediol, proline, etc.). This article elucidates the mechanisms underpinning the role of biofilm-forming PGPB in bolstering plant growth amidst environmental challenges. Furthermore, it explores the tangible applications of these biofilms in agriculture and delves into strategies for manipulating biofilm formation to extract maximal benefits in practical crop production scenarios.
生物膜的形成是微生物在自然环境中表现出的一种关键的适应性特征。这种特性在各种环境中发挥着多方面的作用，包括环境、水生、工业和医疗系统。虽然之前的研究主要集中在生物膜的负面影响上，但有效地利用它们的潜力可能会给人类带来巨大的优势。面对日益加剧的环境压力（如干旱、盐度、极端温度和重金属污染），这些压力危及全球作物产量，提高作物的抗胁迫能力成为恢复充足粮食生产的首要任务。最近，形成生物膜的植物促生细菌（PGPB）已成为农业应用的有前途的候选者。这些生物膜是微生物在植物根系上定殖的证据。它们显著的抗胁迫能力使作物能够在恶劣条件下茁壮成长并产生产量。这是通过增加根的定殖、改善土壤特性和合成有价值的次生代谢物（如 ACC 脱氨酶、乙酰丁香酮、2,3-丁二醇、脯氨酸等）来实现的。本文阐明了形成生物膜的 PGPB 在增强植物生长方面的作用机制，以及它们在农业中的实际应用，并探讨了操纵生物膜形成以在实际作物生产场景中提取最大效益的策略。
