Evaluation of the Growth-Promoting Potential of Endophytic Bacteria Recovered from Healthy Tomato Plants

Journal of Horticulture Pub Date : 2018-01-01 DOI:10.4172/2376-0354.1000234

R. A. Abdallah, H. Jabnoun-Khiareddine, A. Nefzi, M. Daami‐Remadi

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引用次数: 16

Abstract

The study examined the plant growth-promoting potential of 38 endophytic bacterial isolates recovered from healthy tomato plants. Eight isolates were selected as the most efficient in improving the plant height by 30.5-35.9%, the aerial part fresh weight by 47.4 -56.9%, the maximum root length by 17.3- 28.3%, and the root fresh weight by 44.7- 58.8% compared to control. They were morphologically and biochemically characterized and identified using 16S rDNA sequencing genes as Stenotrophomonas maltophilia CT12, S. maltophilia CT13, S. maltophilia CT16, Pseudomonas geniculata CT19, B. amyloliquefaciens CT32, B. subtilis subsp. inaquosorum CT43, B. licheniformis SV4, and B. subtilis SV5. All isolates were shown able to produce indole-3-acetic acid and displayed pectinolytic activity. Phosphate solubilization ability was recorded in S. maltophilia CT13, S. maltophilia CT16, B. subtilis subsp. inaqosorum CT43 and B. licheniformis SV4. This study demonstrates that healthy tomato plants may be naturally colonized by beneficial endophytic bacteria with growth-promoting potential useful for the improvement of tomato growth.

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番茄健康植株内生细菌促生长潜力评价

本研究检测了从健康番茄植株中分离的38株内生细菌的植物促生长潜力。结果表明，与对照相比，8个菌株株高提高30.5 ~ 35.9%，地上部鲜重提高47.4 ~ 56.9%，最大根长提高17.3 ~ 28.3%，根鲜重提高44.7 ~ 58.8%。利用16S rDNA测序基因对它们进行了形态和生化鉴定，鉴定为嗜麦芽窄养单胞菌CT12、嗜麦芽单胞菌CT13、嗜麦芽单胞菌CT16、假单胞菌CT19、解淀粉芽胞菌CT32、枯草芽胞菌亚种。苔藓芽孢杆菌CT43、地衣芽孢杆菌SV4和枯草芽孢杆菌SV5。所有菌株均能产生吲哚-3-乙酸，并表现出果胶溶解活性。测定了嗜麦芽链球菌CT13、嗜麦芽链球菌CT16、枯草芽孢杆菌亚种的增磷能力。苔藓芽孢杆菌CT43和苔藓芽孢杆菌SV4。本研究表明，健康的番茄植株可能被有益的内生细菌自然定植，具有促进生长的潜力，有助于改善番茄的生长。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of Horticulture

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