趋磁细菌作为生物刺激剂，在非生物胁迫下促进番茄和水稻的生长和产量
Magnetotactic bacteria as biostimulants for enhancing the growth and yield of tomato and paddy under abiotic stress.
摘要(中文译文)
养分失衡、土壤盐渍化和耕地缩减威胁全球粮食安全，推动了对可持续生物肥料替代化学投入品的需求。水生生态系统来源的生物肥料，如（MSR-1），是有前景的可持续替代品，因其耐逆性、适应性和植物促生特性而展现出强大的农业潜力。本研究探讨了MSR-1在正常、缺铁和盐胁迫条件下增强番茄和水稻生长及生产力的能力。MSR-1在改良生长培养基（MSGM）中于微需氧条件下培养，扫描电镜（SEM）证实其螺旋状革兰氏阴性形态，并成功且非破坏性地定殖于番茄和水稻的根和叶上。此外，根系分泌物的高分辨液相色谱-质谱联用（HR-LCMS）分析鉴定出趋化化合物，如奎宁酸、色氨酸、槲皮素、硫代葡萄糖苷和独脚金内酯，促进细菌附着。进一步，由MSR-1培养物（1.5 × 10细胞/mL）配制液体生物肥料（MLB），以20-100%浓度施用（25 mL/盆）。在各处理中，20% MLB在正常条件下效果最佳，而60% MLB在缺铁和盐胁迫条件下更有效。在番茄中，20% MLB增加了茎长（73.5 cm）、叶绿素含量（4.5 mg/g）和果实产量（1066.95 g/株）。在胁迫下，60% MLB提高了果实产量（760-800 g/株）并增强了抗氧化酶（SOD 75 U/mg；CAT 15.5 U/mg）。在水稻中，20% MLB增强了茎和根长（66.0和15.13 cm），而胁迫下60% MLB增加了生长、碳水化合物、蛋白质、氨基酸、酚类和抗氧化酶（SOD/CAT 49.63/19.83 U/mg）。总体而言，MSR-1为管理土壤盐渍化和缺铁提供了一种可持续、有效的生物肥料选择。
Abstract
Nutrient imbalances, soil salinity, and shrinking arable land threaten global food security, driving demand for sustainable biofertilizer alternatives to chemical inputs. Aquatic ecosystem-derived biofertilizers such as (MSR-1) are promising sustainable substitutes and show strong agricultural potential due to their stress tolerance, adaptability, and plant growth-promoting traits. This study investigated the ability of MSR-1 to enhance the growth and productivity of tomato and paddy under normal, iron-deficient, and saline conditions. MSR-1 was cultured in modified Growth Medium (MSGM) under microaerophilic conditions, with SEM confirming its spiral gram-negative morphology and successful, non-destructive colonization on tomato and paddy roots and leaves. Moreover, HR-LCMS profiling of root exudates identified chemoattractant compounds such as quinic acid, tryptophan, quercetin, glucosinolates, and strigolactones, promoting bacterial attachment. Further, liquid biofertilizer (MLB) was formulated from MSR-1 cultures (1.5 × 10 cells/mL) and applied at 20-100% concentrations (25 mL/pot). Among the treatments, 20% MLB gave the best results under normal conditions, whereas 60% MLB was more effective under iron-deficient and saline stress conditions. In tomato, 20% MLB increased shoot length (73.5 cm), chlorophyll content (4.5 mg/g), and fruit yield (1066.95 g/plant). Under stress, 60% MLB improved fruit yield (760-800 g/plant) and boosted antioxidant enzymes (SOD 75 U/mg; CAT 15.5 U/mg). In paddy, 20% MLB enhanced shoot and root length (66.0 and 15.13 cm), while 60% MLB under stress increased growth, carbohydrates, proteins, amino acids, phenols, and antioxidant enzymes (SOD/CAT 49.63/19.83 U/mg). Overall, MSR-1 offers a sustainable, effective biofertilizer option for managing soil salinity and iron deficiency.
如何引用
AMA
Shraddha Shirsat, M A Jayasri, K Suthindhiran. Magnetotactic bacteria as biostimulants for enhancing the growth and yield of tomato and paddy under abiotic stress.. Frontiers in microbiology. 2026; doi:10.3389/fmicb.2026.1848546.
APA
Shraddha Shirsat, M A Jayasri, K Suthindhiran (2026). Magnetotactic bacteria as biostimulants for enhancing the growth and yield of tomato and paddy under abiotic stress.. Frontiers in microbiology. https://doi.org/10.3389/fmicb.2026.1848546
GB/T 7714
Shraddha Shirsat, M A Jayasri, K Suthindhiran. Magnetotactic bacteria as biostimulants for enhancing the growth and yield of tomato and paddy under abiotic stress.[J]. Frontiers in microbiology, 2026 doi:10.3389/fmicb.2026.1848546.
在 PubMed增强版 阅读全文
翻译全文 · AI 文献问答 · PDF 原文下载 · 引用导出