Plant Growth-Promoting Traits in Rhizobacteria of Heavy Metal-Resistant Plants and Their Effects on Brassica nigra Seed Germination

Román‐Ponce, Brenda; Reza-Vázquez, Diana Miryel; Gutiérrez-Paredes, Sonia; Haro-Cruz, María de Jesús de; Maldonado-Hernández, Jessica; Bahena-Osorio, Yanely; Santos, Paulina Estrada‐de los; Wang, En Tao; Vásquez-Murrieta, María Soledad

doi:10.1016/s1002-0160(17)60347-3

Cited by 73 publications

(16 citation statements)

References 78 publications

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“…and Pseudomonas significantly improved germination percentage and rate of germination in sorghum and wheat seeds. Similar findings were reported by Nehra et al [16], El-Sheekh et al [17], Gowtham et al [18] and Roman-Ponce et al [19].…”

Section: Effect Of Pgpr Strains On Germination Efficiencysupporting

confidence: 90%

Influence of Microbial Priming on Germination and Seedling Growth Traits of Compact Cotton CO17

Ragadevi

Jeyakumar

Djanaguiraman

et al. 2021

IJPSS

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Cotton, known as “the King of fibers”, is the predominant fiber in the Indian textile industry. Plant growth-promoting rhizobacteria (PGPR) represent a potential sustainable alternative for the enhancement and protection of crops. The germination and seedling growth of cotton can be optimized by inoculating with PGPR. An experiment was conducted to evaluate the effect of different PGPR strains on seed germination and seedling establishment characters on cotton. The highest germination percentage, maximum vigour index and leaf area was obtained with the PPFM TNAU1 strain inoculation. The maximum shoot and root length were observed with seeds treated with Azospirillum strain sp7 with an increase of 24.4 and 42.8% over the control. Underground fresh and dry matter was higher in seedlings treated with Azospirillum sp7 strain compared to control, while the PPFM TNAU1 strain treatment increased the aerial fresh and dry matter content because of its larger leaf area. Seeds inoculated with individual strain of Azospirillum sp7 and PPFM TNAU1 outperformed the combined inoculation of PGPR strains. The increase in germination traits and seedling characters by PGPR strains indicates the positive influence on improving cotton seedling establishment traits associated to higher yield.

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Section: Effect Of Pgpr Strains On Germination Efficiencysupporting

confidence: 90%

Influence of Microbial Priming on Germination and Seedling Growth Traits of Compact Cotton CO17

Ragadevi

Jeyakumar

Djanaguiraman

et al. 2021

IJPSS

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“…Beneficial microorganisms can be isolated and selected from heavy metal-polluted soils, particularly from the rhizosphere of metal-resistant plants, but also from aboveground organs. Bacterial species with plant growth-promoting activity belong to numerous genera, i.e., Alcaligenes , Curtobacterium , Bacillus , Microbacterium , Paenibacillus , Pseudomonas , Streptomyces, and Tetrathiobacter [ 178 , 179 , 180 ], whereas among fungi are rhizosphere endophytes, such as Piriformospora indica, Acrocalymma vagum, and Scytalidium lignicola [ 181 , 182 ]. Improved plant growth under metallic stress is attributed to bacterial capability of nitrogen assimilation, producing and secreting plant growth regulators, particularly IAA, siderophores, and various volatile organic compounds [ 183 , 184 , 185 ].…”

Section: Hydropriming Halopriming Hormopriming and Bioprimingmentioning

confidence: 99%

Priming Strategies for Benefiting Plant Performance under Toxic Trace Metal Exposure

Wiszniewska

2021

Plants

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Combating environmental stress related to the presence of toxic elements is one of the most important challenges in plant production. The majority of plant species suffer from developmental abnormalities caused by an exposure to toxic concentrations of metals and metalloids, mainly Al, As, Cd, Cu, Hg, Ni, Pb, and Zn. However, defense mechanisms are activated with diverse intensity and efficiency. Enhancement of defense potential can be achieved though exogenously applied treatments, resulting in a higher capability of surviving and developing under stress and become, at least temporarily, tolerant to stress factors. In this review, I present several already recognized as well as novel methods of the priming process called priming, resulting in the so-called “primed state” of the plant organism. Primed plants have a higher capability of surviving and developing under stress, and become, at least temporarily, tolerant to stress factors. In this review, several already recognized as well as novel methods of priming plants towards tolerance to metallic stress are discussed, with attention paid to similarities in priming mechanisms activated by the most versatile priming agents. This knowledge could contribute to the development of priming mixtures to counteract negative effects of multi-metallic and multi-abiotic stresses. Presentation of mechanisms is complemented with information on the genes regulated by priming towards metallic stress tolerance. Novel compounds and techniques that can be exploited in priming experiments are also summarized.

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“…[23] showed that inoculation with rhizobacteria generally produces larger aboveground biomass and alters metal availability in the soil. Several studies have shown the use of different bacteria able to enhance plant biomass [24], [25]. However, little information is available regarding the mechanisms by which microbes enhance phytoremediation and biomass in combination with amendments.…”

Section: Tailing Characterizationmentioning

confidence: 99%

Establishment of vegetation in mine tailings using A. tumefaciens and organic matter

Hartshorn¹,

Jennings²,

McDermott³

et al. 2020

Proceedings of the 18th LACCEI International Multi-Conference for Engineering, Education, and Technology: Engineering, Integrat

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The landscape legacy of historical metal-mining activity can persist for decades. The most frequent strategies used for the remediation of contaminated soils include: the use of synthetic membranes to isolate contaminants, direct revegetation, or lime amendments. Looking for more cost-effective bioremediation approaches, we performed a set of greenhouse studies to determine what combinations of soil amendments would lead to the best vegetative response, and potentially associated reductions in soil arsenic (As) levels. In our first greenhouse experiment, we planted Leymus cinereus (basin wildrye) in tailings, compared (after 12 weeks) plant growth, and foliar metal concentrations across treatments. Amendments included single or factorial additions of lime, 5% organic matter (+OM), and an arsenic-oxidizing (+oxbact) strain of Agrobacterium tumefaciens (Agtu). For the first experiment, only one level of OM amendment was tested (5%) and a second greenhouse experiment with two levels of OM (1.5% and 5%). In this second experiment, Basin wildrye grown in soils amended with 5% OM generally did better than those grown in soils amended with 1.5% OM and even better in soils amendment with 5% OM + oxbact. These results suggest the combination of OM and Agtu oxbact strain could provide a potentially cost-effective approach to remediating As-contaminated soils.

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Plant Growth-Promoting Traits in Rhizobacteria of Heavy Metal-Resistant Plants and Their Effects on Brassica nigra Seed Germination

Cited by 73 publications

References 78 publications

Influence of Microbial Priming on Germination and Seedling Growth Traits of Compact Cotton CO17

Influence of Microbial Priming on Germination and Seedling Growth Traits of Compact Cotton CO17

Priming Strategies for Benefiting Plant Performance under Toxic Trace Metal Exposure

Establishment of vegetation in mine tailings using A. tumefaciens and organic matter

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