Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan.
Zhejiang University, Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Hangzhou, PR China.
PeerJ. 2022 May 2;10:e13131. doi: 10.7717/peerj.13131. eCollection 2022.
Heavy metal resistant bacteria are of great importance because they play a crucial role in bioremediation. In the present study, 11 bacterial strains isolated from industrial waste were screened under different concentrations of cadmium (Cd) (100 µM and 200 µM). Among 11 strains, the Cd tolerant (SD) strain was selected for and studies. was able to solubilize potassium, and phosphate as well as produce protease and siderophores during plate essays. Moreover, we observed the response of hydroponically grown rice plants, inoculated with which was able to promote plant growth, by increasing plant biomass, chlorophyll contents, relative water content, different antioxidant enzymatic activity such as catalase, superoxide dismutase, ascorbate peroxidase, polyphenol oxidase and phenylalanine ammonia-lyase and reducing malondialdehyde content in both roots and leaves of rice plants under Cd stress. Our results showed that the can be used as a biofertilizer which might be beneficial for rice cultivation in Cd contaminated soils.
耐重金属细菌具有重要意义，因为它们在生物修复中发挥着关键作用。本研究从工业废水中分离出 11 株细菌，在不同浓度的镉（Cd）（100µM 和 200µM）下进行筛选。在 11 株菌中，选择耐 Cd 的（SD）菌株进行和研究。在平板实验中，能够溶解钾、磷，以及产生蛋白酶和铁载体。此外，我们观察了水培水稻植株的反应，接种后能够促进植物生长，增加植物生物量、叶绿素含量、相对含水量、不同抗氧化酶活性，如过氧化氢酶、超氧化物歧化酶、抗坏血酸过氧化物酶、多酚氧化酶和苯丙氨酸解氨酶，以及降低 Cd 胁迫下水稻植株根和叶中的丙二醛含量。我们的结果表明，该可以用作生物肥料，这可能有利于在 Cd 污染土壤中种植水稻。
