Tolerance of cotton to elevated levels of Pb and its potential for phytoremediation

Ramana, S.; Tripathi, A.K.; Kollah, Bharati; Singh, Amar; Kumar, Ajay; Sahu, Asha; Rajput, Poonam Singh; Dey, Pradip; Saha, J. K.; Patra, A. K.

doi:10.1007/s11356-021-13067-6

Cited by 10 publications

(7 citation statements)

References 54 publications

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“…In contrast to the study of Yang et al (2014) , this study demonstrated a significant negative correlation between FDA hydrolysis and soil Pb contamination level in SP ( Table 2 ; Figure 2 ). A high Pb level in the soil would lead to the denaturation of enzymes such as esterases, proteases, and lipases involved in FDA hydrolysis ( Patle et al, 2018 ; Ramana et al, 2021 ; Li et al, 2022 ). The different feeding habits of different earthworm ecotypes can have different influences on microbial activity ( Boughattas et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Ecologically different earthworm species are the driving force of microbial hotspots influencing Pb uptake by the leafy vegetable Brassica campestris

Tibihenda,

Zhong,

Liu

et al. 2023

Front. Microbiol.

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Food chain contamination by soil lead (Pb), beginning with Pb uptake by leafy vegetables, is a threat to food safety and poses a potential risk to human health. This study highlights the importance of two ecologically different earthworm species (the anecic species Amynthas aspergillum and the epigeic species Eisenia fetida) as the driving force of microbial hotspots to enhance Pb accumulation in the leafy vegetable Brassica campestris at different Pb contamination levels (0, 100, 500, and 1,000 mg·kg−1). The fingerprints of phospholipid fatty acids (PLFAs) were employed to reveal the microbial mechanism of Pb accumulation involving earthworm–plant interaction, as PLFAs provide a general profile of soil microbial biomass and community structure. The results showed that Gram-positive (G+) bacteria dominated the microbial community. At 0 mg·kg−1 Pb, the presence of earthworms significantly reduced the total PLFAs. The maximum total of PLFAs was found at 100 mg·kg−1 Pb with E. fetida inoculation. A significant shift in the bacterial community was observed in the treatments with E. fetida inoculation at 500 and 1,000 mg·kg−1 Pb, where the G+/G− bacteria ratio was significantly decreased compared to no earthworm inoculation. Principal component analysis (PCA) showed that E. fetida had a greater effect on soil microbial hotspots than A. aspergillum, thus having a greater effect on the Pb uptake by B. campestris. Redundancy analysis (RDA) showed that soil microbial biomass and structure explained 43.0% (R2 = 0.53) of the total variation in Pb uptake by B. campestris, compared to 9.51% of microbial activity. G− bacteria explained 23.2% of the total variation in the Pb uptake by B. campestris, significantly higher than the other microbes. The Mantel test showed that microbial properties significantly influenced Pb uptake by B. campestris under the driving force of earthworms. E. fetida inoculation was favorable for the G− bacterial community, whereas A. aspergillum inoculation was favorable for the fungal community. Both microbial communities facilitated the entry of Pb into the vegetable food chain system. This study delivers novel evidence and meaningful insights into how earthworms prime the microbial mechanism of Pb uptake by leafy vegetables by influencing soil microbial biomass and community composition. Comprehensive metagenomics analysis can be employed in future studies to identify the microbial strains promoting Pb migration and develop effective strategies to mitigate Pb contamination in food chains.

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Section: Discussionmentioning

confidence: 99%

Ecologically different earthworm species are the driving force of microbial hotspots influencing Pb uptake by the leafy vegetable Brassica campestris

Tibihenda,

Zhong,

Liu

et al. 2023

Front. Microbiol.

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“…High concentrations of Pb in soil reduced the photosynthetic activities and RTW in soybean [64] and wheat [65]. Additionally, growth retardation and limited biomass of Athyrium wardii [66] and cotton [61] raised on Pb-contaminated soils were observed. In our experiment, compared to untreated pots, the greatest improvement in RTW values, contents of photosynthetic pigments, growth, and yield were achieved in the CIA+melatonin treatment (Table 4).…”

Section: Growth Yield Photosynthetic Pigments and Moisture Content Of...mentioning

confidence: 98%

“…Soil pollution with Pb resulted in high values of ST(Pb), RT(Pb), BAF(ST), and BAF(RT) in spinach [6] and cotton [61]. The most important data related to the reduced PbDTPA and PbH2O in soil (Figure 1F,G), the values of ST(Pb) and RT(Pb) (Figure 1A,B), as well as their BAF(ST), BAF(RT), and TF(ST) values (Figure 1C-E), were achieved with CIA+melatonin treatment.…”

Section: Lead Concentrations In Plant Parts and Plant-accessible Pbmentioning

confidence: 99%

“…Similarly, Vannini et al [62] confirmed that the addition of BH (5% w/w) in Pb-contaminated soil effectively reduced soil bioavailable fraction of Pb (up to 50%) and its accumulation in lettuce shoots (up to 50%). The lower availability of Pb in the soil and its uptake by spinach is because of multiple mechanisms associated with BH and MKC in the CIA, which are as follows: (i) the hydration process of MKC within the soil contributed to the conversion of Pb into extremely insoluble Pb-based Soil pollution with Pb resulted in high values of ST(Pb), RT(Pb), BAF(ST), and BAF(RT) in spinach [6] and cotton [61]. The most important data related to the reduced PbDTPA and PbH 2 O in soil (Figure 1F,G), the values of ST(Pb) and RT(Pb) (Figure 1A,B), as well as their BAF(ST), BAF(RT), and TF(ST) values (Figure 1C-E), were achieved with CIA+melatonin treatment.…”

Section: Lead Concentrations In Plant Parts and Plant-accessible Pbmentioning

confidence: 99%

“…Soil pollution with Pb negatively influences the activities of urease, catalase, acid phosphatase, phosphomonoestrase, protease, and β-glucosidase in Pb-contaminated soils because Pb directly alters the numbers and diversity of soil microbiota [61,66]. In the current study, the CIA+melatonin treatment reflected the maximum numbers of bacteria, fungi, and actinomycetes, and the values of MBC in bulk and rhizosphere soil sections (Figure 5A-D) along with enzymes, compared to control (Figure 4A-H).…”

Section: Enzymatic Activities Microbial Numbers and Mbc In The Soilmentioning

confidence: 99%

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Soil Amendments and Foliar Melatonin Reduced Pb Uptake, and Oxidative Stress, and Improved Spinach Quality in Pb-Contaminated Soil

Iqbal

Tanzeem-ul-Haq

Gull-e-Faran

et al. 2023

Plants

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Amending Pb-affected soil with biochar (BH) and magnesium potassium phosphate cement (MKC) reduces Pb uptake in plants. Moreover, foliar applications of melatonin and proline are also known to reduce plant oxidative stress and Pb uptake. However, little is known about combining both techniques, i.e., adding a combo immobilizing dose (CIA = mixture of BH and MKC at 50:50 ratio) in Pb-polluted soil and foliar application of proline and melatonin for reducing Pb uptake and oxidative stress in spinach. Control, proline, melatonin, CIA, CIA+proline, and CIA+melatonin were the treatments utilized in this pot study to see their effects on reducing plant oxidative stress, Pb uptake, and improving spinach quality in Pb-polluted soil. Moreover, Pb bioavailability, enzymatic activities, and numbers of bacteria, fungi, and actinomycetes in the soil were also evaluated. The effect of CIA on reducing Pb in the soil-plant system and improving soil enzymes and microbial numbers was more pronounced than melatonin alone. The most effective treatment was CIA+melatonin reducing Pb availability in soil (77%), shoots (95%), and roots (84%), alleviating oxidative stress, and improving plant biomass (98%) and nutrients. Soil enzymatic activities and the number of microorganisms in the rhizosphere were also highest with CIA+melatonin. Results highlight the significance of CIA+melatonin, as an inexpensive approach, in remediating Pb-polluted soil and improving spinach quality. However, further research is needed to understand the significance of CIA+melatonin on different crops and various soil Pb concentrations before employing this technique commercially in agriculture and environment sectors.

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Toxic effects of lead on plants: integrating multi-omics with bioinformatics to develop Pb-tolerant crops

Ilyas,

Sa,

Ali

et al. 2023

Planta

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Tolerance of cotton to elevated levels of Pb and its potential for phytoremediation

Cited by 10 publications

References 54 publications

Ecologically different earthworm species are the driving force of microbial hotspots influencing Pb uptake by the leafy vegetable Brassica campestris

Ecologically different earthworm species are the driving force of microbial hotspots influencing Pb uptake by the leafy vegetable Brassica campestris

Soil Amendments and Foliar Melatonin Reduced Pb Uptake, and Oxidative Stress, and Improved Spinach Quality in Pb-Contaminated Soil

Toxic effects of lead on plants: integrating multi-omics with bioinformatics to develop Pb-tolerant crops

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