کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8895486 | 1630326 | 2017 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Plant Growth-Promoting Traits in Rhizobacteria of Heavy Metal-Resistant Plants and Their Effects on Brassica nigra Seed Germination
ترجمه فارسی عنوان
ویژگی های رشد گیاهی در ریزوباکتریوم گیاهان مقاوم در برابر فلزات و تأثیر آنها بر جوانه زنی بذر براسیکا نجرا
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
چکیده انگلیسی
Phytoremediation is an emerging technology that uses plants and their associated microbes to clean up pollutants from the soil, water, and air. In order to select the plant growth-promoting rhizobacteria (PGPR) for phytoremediation of heavy metal contamination, 60 bacterial strains were isolated from the rhizosphere of two endemic plants, Prosopis laevigata and Spharealcea angustifolia, in a heavy metal-contaminated zone in Mexico. These rhizobacterial strains were characterized for the growth at different pH and salinity, extracellular enzyme production, solubilization of phosphate, heavy metal resistance, and plant growth-promoting (PGP) traits, including production of siderophores and indol-3-acetic acid (IAA). Overall, the obtained rhizobacteria presented multiple PGP traits. These rhizobacteria were also resistant to high levels of heavy metals (including As as a metalloid) (up to 480 mmol Lâ1 As(V), 24 mmol Lâ1 Pb(II), 21 mmol Lâ1 Cu(II), and 4.5 mmol Lâ1 Zn(II)). Seven rhizobacterial strains with the best PGP traits were identified as members of Alcaligenes, Bacillus, Curtobacterium, and Microbacterium, and were selected for further bioassay. The inoculation of Brassica nigra seeds with Microbacterium sp. CE3R2, Microbacterium sp. NE1R5, Curtobacterium sp. NM1R1, and Microbacterium sp. NM3E9 facilitated the root development; they significantly improved the B. nigra seed germination and root growth in the presence of heavy metals such as 2.2 mmol Lâ1 Zn(II). The rhizobacterial strains isolated in the present study had the potential to be used as efficient bioinoculants in phytorremediation of soils contaminated with multiple heavy metals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pedosphere - Volume 27, Issue 3, June 2017, Pages 511-526
Journal: Pedosphere - Volume 27, Issue 3, June 2017, Pages 511-526
نویسندگان
Brenda ROMÁN-PONCE, Diana Miryel REZA-VÁZQUEZ, Sonia GUTIÃRREZ-PAREDES, MarÃa de Jesús DE HARO-CRUZ, Jessica MALDONADO-HERNÁNDEZ, Yanely BAHENA-OSORIO, Paulina ESTRADA-DE LOS SANTOS, En Tao WANG, MarÃa Soledad VÁSQUEZ-MURRIETA,