Metal Stress Impacting Plant Growth in Contaminated Soil Is Alleviated by Microbial Siderophores

Sundaram, Lalitha; Rajendran, Santhakumari; Subramanian, Nithyapriya

doi:10.1007/978-981-15-9912-5_12

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…Plant species used for phytoremediation should have the features of being native, having quick growth rates, high biomass yield, extensive root systems, tolerance to high salinity and pH, and various habitat adaptations, as well as the ability to accumulate the absorbed pollutants [45,46]. Unfortunately, most of these features are often the same characteristics displayed by aquatic plants used as food-the very reason they tend to absorb heavy metals easily.…”

Section: Mechanisms Of Heavy Metal Accumulationmentioning

confidence: 99%

“…However, this may not always be practical and feasible in instances where rural communities rely on naturally grown aquatic plants [127,128]. Suitable management of heavy metal-contaminated ecosystems plays a pivotal role in maintaining environmental health and in ecological restoration [46].…”

Section: Mitigation Of Heavy Metal Accumulation In Rice and Aquatic Plantsmentioning

confidence: 99%

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Heavy Metal Accumulation in Rice and Aquatic Plants Used as Human Food: A General Review

Uddin

Zakeel

Zavahir

et al. 2021

Toxics

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Aquatic ecosystems are contaminated with heavy metals by natural and anthropogenic sources. Whilst some heavy metals are necessary for plants as micronutrients, others can be toxic to plants and humans even in trace concentrations. Among heavy metals, cadmium (Cd), arsenic (As), chromium (Cr), lead (Pb), and mercury (Hg) cause significant damage to aquatic ecosystems and can invariably affect human health. Rice, a staple diet of many nations, and other aquatic plants used as vegetables in many countries, can bioaccumulate heavy metals when they grow in contaminated aquatic environments. These metals can enter the human body through food chains, and the presence of heavy metals in food can lead to numerous human health consequences. Heavy metals in aquatic plants can affect plant physicochemical functions, growth, and crop yield. Various mitigation strategies are being continuously explored to avoid heavy metals entering aquatic ecosystems. Understanding the levels of heavy metals in rice and aquatic plants grown for food in contaminated aquatic environments is important. Further, it is imperative to adopt sustainable management approaches and mitigation mechanisms. Although narrowly focused reviews exist, this article provides novel information for improving our understanding about heavy metal accumulation in rice and aquatic plants, addressing the gaps in literature.

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Section: Mechanisms Of Heavy Metal Accumulationmentioning

confidence: 99%

Section: Mitigation Of Heavy Metal Accumulation In Rice and Aquatic Plantsmentioning

confidence: 99%

Heavy Metal Accumulation in Rice and Aquatic Plants Used as Human Food: A General Review

Uddin

Zakeel

Zavahir

et al. 2021

Toxics

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show abstract

“…In this study, the bacteria that produced the most siderophores were R25 and R325 (Figure 1c, Table 4). Many studies have shown that siderophore-producing bacteria can help plants to alleviate heavy metal stress and reduce the accumulation of heavy metals in plants [43]. The potential of the siderophore-producing bacteria in this study to aid in stress resistance needs to be further investigated.…”

Section: The Bacterial Combinations Have a More Pronounced Growth-pro...mentioning

confidence: 92%

Assembly of Tomato Rhizobacteria from Different Functional Groups Improves Seedling Photosynthesis and Growth

Zhao,

Hong,

Wang

et al. 2023

Plants

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The rhizosphere harbors abundant plant growth-promoting rhizobacteria (PGPR) that are vital for plant health. In this study, we screened growth-promoting bacteria from tomato rhizosphere soil, verified their functions, and constructed the optimal combination of growth-promoting bacteria for promoting tomato growth. Furthermore, the effects of these bacteria on various physiological and biochemical parameters of tomato plants were evaluated. A total of 36 strains of rhizobacteria were isolated from tomato rhizosphere soil and their abilities to produce indole-3-acetic acid (IAA), solubilize phosphate and iron carriers were assessed. The bacterial strains with the highest capacities for IAA production (R62, R317), phosphate solubilization (R41, R219), and siderophore production (R25, R325) were selected to form three bacterial combinations: R62 + R219 + R317 + R325 (T1), R62 + R325 (T5), and R317 + R325 (T8). Fifteen days after inoculation, all three combinations showed a stimulatory effect on seedling growth compared to the un-inoculated control. Inoculation with T1, T5 and T8 increased the seedling vigor index by 173.7%, 204.1%, and 168.7%, respectively. Compared to the un-inoculated control, the T1 combination increased the activities of polyphenol oxidase, peroxidase, and the net photosynthetic rate by 132.7%, 18.7%, 58.5%, and upregulated the relative expression levels of the photosynthetic assimilation-related genes RbcL, RbcS, FBPase and FDA by 22.2-, 6.6-, 1.95-, and 2.0-fold, respectively. Our findings provide a potential for constructing rhizobacterial combinations of different functional groups for improving crop growth.

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“…Several PGPR and PGPF strains are effective inhibitors of plant pathogens and pests, thereby protecting the plants from biotic stress [8,9]. Biofilm and polysaccharide-producing microbes in the rhizosphere could also protect the plants against abiotic stresses, including drought, salinity, heavy metals, and hydrocarbon pollution [10,11]. Due to the multiple benefits of plant-microbe association, effective microbial strains are supplemented as biofertilizers, biopesticides, and biocontrol agents in the agricultural ecosystem.…”

Section: Introductionmentioning

confidence: 99%

SCAR marker: A potential tool for authentication of agriculturally important microorganisms

Ambreetha

Balachandar

2022

J Basic Microbiol

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Microbial inoculants are globally recommended for plant growth promotion and control of plant pathogens. These inoculants require stringent quality checks for sustainable field efficacy. Questionable regulatory frameworks constantly deteriorate the reliability of bio‐inoculant technology. Existing global regulations do not involve any rapid molecular technique for the routine inspection of microbial preparations. Sequence characterized amplified region (SCAR) marker offers rapid and precise strain‐level authentication of target microbes. Such advanced molecular techniques must be exploited to accurately validate the microbial formulations. Besides, the global dissemination of plant pathogenic microbes has always been an alarming threat to food security. SCAR markers could be used at the plant quarantine centers to rapidly detect catastrophic pathogens, thereby circumventing the import and export of contagious plant materials. The current review is focused on promoting the SCAR marker technology to validate commercial bio‐inoculants and predict plant pandemics.

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Metal Stress Impacting Plant Growth in Contaminated Soil Is Alleviated by Microbial Siderophores

Cited by 7 publications

References 37 publications

Heavy Metal Accumulation in Rice and Aquatic Plants Used as Human Food: A General Review

Heavy Metal Accumulation in Rice and Aquatic Plants Used as Human Food: A General Review

Assembly of Tomato Rhizobacteria from Different Functional Groups Improves Seedling Photosynthesis and Growth

SCAR marker: A potential tool for authentication of agriculturally important microorganisms

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