Ghazi Faisal Zeena
Department of Biology, College of Education, Al-Iraqia University, Baghdad, Iraq.
Scientifica (Cairo). 2024 Apr 25;2024:7137413. doi: 10.1155/2024/7137413. eCollection 2024.
With growing environmental concerns and a growing world population, there is an interest in developing cheap, efficient, and environmentally friendly substances that benefit humanity. Microbial surfactants are nontoxic, biodegradable bioproducts that provide sustainable solutions in agricultural applications due to their many benefits over their synthetic counterparts. Hence the crucial importance of scientific research to understand the effect of microbial surfactants on plant development. The present study aimed to assess the effect of rhamnolipid produced by on seed germination of wheat (), barley (), okra (), onion (), and lettuce () under laboratory conditions. The results showed that was capable of producing 3.83 g/L of viscous, honey-colored rhamnolipid, which was capable of lowering the surface tension to 30 ± 0.33 mN/m. Different concentrations of rhamnolipid ranging from 0.25 to 1.00 g/L were assessed, with distilled water acting as a control. After treatment of seeds, results showed that applying 0.25 g/L of rhamnolipid can significantly increase seed germination to 100% on the fourth day of sowing okra and lettuce, and on the fifth day of sowing onion seeds, compared to control groups that recorded 60%, 50%, and 55%, respectively. In wheat and barley seeds, applying rhamnolipid can protect seeds from pathogenic fungi while delaying their germination to 60% and 70% on the third day of sowing, while 90% and 100% have been reported in the control groups. Thus, this biological molecule demonstrates promising results in enhancing seed germination of the studied species by protecting them from phytopathogens and then aiding plant growth.
随着环境问题日益严重以及世界人口不断增长，人们对开发造福人类的廉价、高效且环保的物质产生了兴趣。微生物表面活性剂是无毒、可生物降解的生物产品，由于其相较于合成表面活性剂具有诸多优势，因而在农业应用中提供了可持续的解决方案。因此，开展科学研究以了解微生物表面活性剂对植物发育的影响至关重要。本研究旨在评估由[具体微生物]产生的鼠李糖脂在实验室条件下对小麦（[品种名称]）、大麦（[品种名称]）、秋葵（[品种名称]）、洋葱（[品种名称]）和生菜（[品种名称]）种子萌发的影响。结果表明，[具体微生物]能够产生3.83克/升的粘性、蜂蜜色鼠李糖脂，该鼠李糖脂能够将表面张力降低至30±0.33毫牛顿/米。评估了浓度范围为0.25至1.00克/升的不同浓度鼠李糖脂，以蒸馏水作为对照。种子处理后，结果显示，与分别记录为60%、50%和55%的对照组相比，施加0.25克/升的鼠李糖脂可在秋葵和生菜播种后第四天以及洋葱种子播种后第五天显著提高种子发芽率至100%。在小麦和大麦种子中，施加鼠李糖脂可保护种子免受病原真菌侵害，同时在播种后第三天将其发芽率延迟至60%和70%，而对照组分别为90%和100%。因此，这种生物分子通过保护受试物种免受植物病原体侵害并促进植物生长，在提高种子发芽率方面显示出了有前景的结果。
