Abstract
Anthropogenic activities have added a large amount of heavy metals to the environment. Heavy metal contaminants affect the physiological and biological properties of soil and plant health. Zinc (Zn) is an essential micronutrient and it promotes plant growth and development but a higher concentration of the metal causes reduction in plant growth. The present study was aimed to evaluate the response of Bacillus cereus on maize plants at different concentrations of ZnSO4 (20, 40 and 60 mg kg–1) amended in the soil under pot experiment conditions. The experiment was conducted by using complete randomized design (CRD) with three replications. Higher doses of ZnSO4 inhibited maize growth and nutrient uptake. However, inoculation of maize seeds with Bacillus cereus at 20 mg kg–1 concentration of ZnSO4 increased seed germination about 39% and plant height by 15%. Moreover, 17% increase in leaf length and a 7% increase in leaf number were observed as compared to control at 20 mg kg–1 concentrations of ZnSO4. Reductions in all growth parameters were observed with 60 mg kg–1 concentration of ZnSO4. The Zn uptake was 75% higher in treatment T8 (uninoculated seeds with 60 mg kg–1 concentration of ZnSO4) as compared to treatments which were inoculated and grown under different zinc concentrations. The results suggest that Bacillus cereus has good potential to remediate Zn from soil as well as to reduce the phyto-availibility and phytotoxicity of zinc.
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Claims 9
Claim · model-written summary
Higher ZnSO4 doses inhibited maize growth.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher doses of ZnSO4 inhibited maize growth and nutrient uptake”
Claim · model-written summary
Higher ZnSO4 doses inhibited maize nutrient uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher doses of ZnSO4 inhibited maize growth and nutrient uptake”
Claim · model-written summary
Bacillus cereus seed inoculation at 20 mg kg–1 ZnSO4 increased germination by about 39%.
- Treatment
- inoculation of maize seeds with Bacillus cereus at 20 mg kg–1 concentration of ZnSO4e0
- Interactor
- Bacillus cereus
Bacillus cereuse0symbiont - Outcome
- seed germinatione0
- Direction
- increasede0
- Value
- 39%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of maize seeds with Bacillus cereus at 20 mg kg–1 concentration of ZnSO4 increased seed germination about 39% and plant height by 15%”
Claim · model-written summary
Bacillus cereus seed inoculation at 20 mg kg–1 ZnSO4 increased plant height by 15%.
- Treatment
- inoculation of maize seeds with Bacillus cereus at 20 mg kg–1 concentration of ZnSO4e0
- Interactor
- Bacillus cereusBacillus cereuse0symbiont
- Outcome
- plant heighte0
- Direction
- increasede0
- Value
- 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of maize seeds with Bacillus cereus at 20 mg kg–1 concentration of ZnSO4 increased seed germination about 39% and plant height by 15%”
Claim · model-written summary
Leaf length increased 17% relative to control at 20 mg kg–1 ZnSO4.
- Treatment
- 20 mg kg–1 concentrations of ZnSO4e0
- Outcome
- leaf lengthe0
- Direction
- increasee0
- Value
- 17%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“17% increase in leaf length and a 7% increase in leaf number were observed as compared to control at 20 mg kg–1 concentrations of ZnSO4”
t0“Zea mays”
Claim · model-written summary
Leaf number increased 7% relative to control at 20 mg kg–1 ZnSO4.
- Treatment
- 20 mg kg–1 concentrations of ZnSO4e0
- Outcome
- leaf numbere0
- Direction
- increasee0
- Value
- 7%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“17% increase in leaf length and a 7% increase in leaf number were observed as compared to control at 20 mg kg–1 concentrations of ZnSO4”
t0“Zea mays”
Claim · model-written summary
All growth parameters declined with 60 mg kg–1 ZnSO4.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reductions in all growth parameters were observed with 60 mg kg–1 concentration of ZnSO4”
t0“Zea mays”
Claim · model-written summary
Zinc uptake was 75% higher in uninoculated T8 at 60 mg kg–1 ZnSO4 than in inoculated treatments.
- Treatment
- treatment T8 (uninoculated seeds with 60 mg kg–1 concentration of ZnSO4)e0
- Outcome
- Zn uptakee0
- Direction
- highere0
- Value
- 75%e0
- Comparator
- treatments which were inoculated and grown under different zinc concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Zn uptake was 75% higher in treatment T8 (uninoculated seeds with 60 mg kg–1 concentration of ZnSO4) as compared to treatments which were inoculated and grown under different zinc concentrations”
t0“Zea mays”
Claim · model-written summary
The authors suggest Bacillus cereus can reduce zinc phytoavailability and phytotoxicity.
- Interactor
- Bacillus cereusBacillus cereuse0symbiont
- Outcome
- phyto-availibility and phytotoxicity of zince0
- Direction
- reducee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus cereus has good potential to remediate Zn from soil as well as to reduce the phyto-availibility and phytotoxicity of zinc”
t0“Zea mays”
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