Application of a newly recorded diazotrophic cyanobacterium in acidified and Cd contaminated paddy soil: Promotes rice yield and decreases Cd accumulation

Hu, Ting; Jiang, Yanjie; Sun, Chenmin; Luo, Si; Shao, Jihai

doi:10.1016/j.scitotenv.2021.152630

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…A survey, conducted by the China Ministry of Ecology and Environment in 2014, showed that the farmland soil defined as Cd contamination soil exceeded 7% of total farming land [3]. The biomass of crops growing in Cd contaminated soil can be reduced by 15% compared to soil with proper amendments [4,5], threatening land productivity and market supply. It is difficult to naturally remove Cd; however, it is highly toxic and easy to transfer and enrich in edible parts of the agricultural products [6].…”

Section: Introductionmentioning

confidence: 99%

Three Different Fertilizers Enhance Spinach Growth and Reduce Spinach Cd Concentration in Cd Contaminated Alkaline Soil

Pan

Lang

et al. 2023

Horticulturae

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In order to investigate the impact of peach branch derived fertilizer (PB), cow manure derived fertilizer (CM) and silicon liquid fertilizer (Si) on the growth and Cd uptake of the Spinacia oleracea L. in the Cd contaminated soil, a pot experiment was conducted. The fertilizers were applied with low (L), medium (M) or high (H) levels, leading to nine treatments and a control group (CK). As a result, compared to CK, PB increased shoot dry mass by 15 to 46% and reduced shoot Cd by 19 to 56%; CM increased shoot dry mass by 6.1 to 162% and reduced shoot Cd by 38 to 55%; Si showed no effect on plant biomass but significantly reduced the root Cd bioconcentration factor. The CMM and CMH significantly reduced soil-available Cd by 6.5 and 7.5%, respectively, compared to CK. The CM enhanced the plant biomass dilution of Cd and decreased soil-available Cd, but led to higher total shoot Cd accumulation. PB led to simultaneous decline of the shoot Cd and total shoot Cd accumulation, indicating a stronger plant Cd “rejection” effect, independent from biomass accumulation. Si reduced plant root Cd with the sacrifice of biomass accumulation.

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Section: Introductionmentioning

confidence: 99%

Three Different Fertilizers Enhance Spinach Growth and Reduce Spinach Cd Concentration in Cd Contaminated Alkaline Soil

Pan

Lang

et al. 2023

Horticulturae

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“…Some diazotrophic cyanobacteria can promote growth of rice through synthesize and secret plant growth-promoting hormones (Sharma et al, 2020). And also, some diazotrophic cyanobacteria could hydrolyze organophosphorus and increase the level of bioavailable P in paddy field (Subramanian et al, 1994;Hu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Biotoxicity of NH4+ on Nostoc Sphaeroides (diazotrophic cyanobacteria) in paddy floodwater

Shao,

Fan,

Feng

2023

Appl Env Biotechnol

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In order to elucidate the toxicity of NH4+ on Nostoc Sphaeroides (commonly named GE-XIAN-MI in China, GXM), a diazotrophic cyanobacterium in paddy fields, this study investigated the growth, photosynthesis, N2-fixation, and oxidative-antioxidative characteristics of GXM under NH4+ stress in paddy floodwater. The results showed that the photosynthesis and the N2-fixing ability of GXM were inhibited by NH4+ at a concentration of 13.46 mg L-1 in paddy floodwater. The main target of NH4+ on photosystem II (PS II) of GXM was the electron donor side of react center. Oxygen evolution complex (OEC) was the secondary target of toxicity of NH4+ on PS II. The damage of PS II led to accumulation of ROS and resulted in oxidative damage on plasma membrane of GXM. Feedback inhibition and decrease of photosynthetic energy production may be the reasons for the decrease of N2-fixing ability of GXM under NH4+ stress. The results presented in this study suggest that high level of NH4+ loading may be a reason for the recession of GXM resource in paddy fields.

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“…Thus, diazotrophic cyanobacteria have great potential to reduce N chemical fertilizer loading into paddy fields, and they may be useful in preventing soil acidification. Previous studies demonstrated that the inoculation of diazotrophic cyanobacteria into paddy fields promoted the growth of rice seedlings and increased grain yield through N input, P activation, and plant growth hormones production [ 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Physiological Responses of a Diazotrophic Cyanobacterium to Acidification of Paddy Floodwater: N2 Fixation, Photosynthesis, and Oxidative–Antioxidative Characteristics

Yan

Xiao

Li³

et al. 2022

IJERPH

Self Cite

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Long-term of excessive fertilization using nitrogen (N) chemical fertilizer caused the acidification of paddy soils. Presently, the impacts of soil acidification on physiological characteristics of diazotrophic cyanobacteria remain unknown. In order to elucidate this issue, the effects of paddy floodwater acidification on activities of respiration, photosynthetic oxygen evolution, and N2 fixation of a paddy diazotrophic cyanobacterium Aliinostoc sp. YYLX235 were investigated in this study. In addition, the origination and quenching of intracellular reactive oxygen species (ROS) were analyzed. The acidification of paddy floodwater decreased intracellular pH and interfered in energy flux from light-harvesting chlorophyll antenna to the reaction center of photosystem II (PS II). Activities of respiration, photosynthetic oxygen evolution, and N2 fixation were decreased by the acidification of paddy floodwater. Accompanied with an increase in ROS, the level of antioxidative system increased. Superoxide dismutase (SOD) and catalase (CAT) were the main enzymatic ROS scavengers in the cells of YYLX235; reduced glutathione (GSH) was the main non-enzymatic antioxidant. Antioxidants and oxidants in the cells of YYLX235 lost balance when the pH of paddy floodwater fell to 5.0 and 4.0, and lipid oxidative damage happened. The results presented in this study suggest that the acidification of paddy soil severely interfered in the photosynthesis of diazotrophic cyanobacteria and induced the production of ROS, which in turn resulted in oxidative damage on diazotrophic cyanobacteria and a decrease in cell vitality.

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Application of a newly recorded diazotrophic cyanobacterium in acidified and Cd contaminated paddy soil: Promotes rice yield and decreases Cd accumulation

Cited by 14 publications

References 39 publications

Three Different Fertilizers Enhance Spinach Growth and Reduce Spinach Cd Concentration in Cd Contaminated Alkaline Soil

Three Different Fertilizers Enhance Spinach Growth and Reduce Spinach Cd Concentration in Cd Contaminated Alkaline Soil

Biotoxicity of NH4+ on Nostoc Sphaeroides (diazotrophic cyanobacteria) in paddy floodwater

Physiological Responses of a Diazotrophic Cyanobacterium to Acidification of Paddy Floodwater: N2 Fixation, Photosynthesis, and Oxidative–Antioxidative Characteristics

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