Abstract
Brassica sp. is a horticultural crop with high demand for consumption. To meet the demand, farmers apply intensive farming to increase yields and prevent plant pests and diseases that cause yield loss. Agrochemical applications in the form of inorganic fertilizers and pesticides contribute to lead (Pb) contamination in agricultural soils and increase lead (Pb) content in the cultivated plants. Nowadays, using bacteria for remediation (bioremediation) is environmentally friendly and effective in cleaning pollutants by converting organic Pb into inorganic Pb which is less toxic. This study aims to explore Pb-resistant bacteria that can reduce Pb-accumulation on food crops such as Brassica sp. grown in Pb-contaminated soil. This study isolated 15 isolates that survived on nutrient agar containing 1,000 mg/L Pb(NO3)2. The study showed 2 potential Pb-resistant bacteria that reduced Pb accumulation in Brassica sp. up to 30.5%. The bacteria are gram-positive bacilli and non-human pathogens (PT-3 and PT-5). DNA barcode identification results showed the isolates identified as Bacillus altitudinis (PT-3) and Bacillus wiedmannii (PT-5). Aplication of the bacteria increases the shoot length and fresh weight of Brassica sp. Application of the bacteria improves food crops quality by reducing heavy metals accumulation, such as Pb. Thus, the bacteria are potential as biofertilizers for reducing agrochemicals use in intensive agriculture areas and preventing environmental destruction and food contamination. Keywords: Bioremediation, Brassica sp., Inorganic Fertilizers, Lead-Resistant Bacteria, Pesticides.
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Claims 3
Claim · model-written summary
Two Pb-resistant bacteria reduced Brassica lead accumulation by up to 30.5%.
- Treatment
- 2 potential Pb-resistant bacteriae1
- Outcome
- Pb accumulation in Brassica sp.e1
- Direction
- reducede1
- Value
- 30.5%e1
BrassicaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“2 potential Pb-resistant bacteria that reduced Pb accumulation in Brassica sp. up to 30.5%”
Claim · model-written summary
The isolates were identified as Bacillus altitudinis and Bacillus wiedmannii.
- Interactor
- Bacillus altitudinisBacillus altitudinise1biocontrol_agent
- Outcome
- isolates identified as Bacillus altitudinis (PT-3) and Bacillus wiedmannii (PT-5)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica sp.”
e1“isolates identified as Bacillus altitudinis (PT-3) and Bacillus wiedmannii (PT-5)”
Claim · model-written summary
Bacterial application increased Brassica shoot length and fresh weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aplication of the bacteria increases the shoot length and fresh weight of Brassica sp.”
The same questions in other papers
inoculation · growth · BrassicaPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.