Abstract
The effects of potassium (K) fertilization (KCl, analytically pure; 0, 60, 200, and 400 mg kg−1) on the growth and Mn accumulation of Camellia oleifera in two types of Mn-contaminated soils were investigated. The potential mechanisms underlying the impacts of K fertilization were explored. C. oleifera accumulated high amounts of Mn in both soil conditions. The addition of K fertilizer decreased the soil pH and promoted Mn accumulation in C. oleifera. However, the plant biomass decreased significantly under the high level of K fertilization (400 mg kg−1), and the oxidative stress was stimulated under Mn contamination. But an appropriate concentration of K fertilizer (200 mg kg−1) was necessary for the formation of photosynthesis pigments, nonenzymatic antioxidants and antioxidant enzymes, metabolic processes, and nutrient uptake. Furthermore, when plants supplemented with a low level of K fertilization (200 mg kg−1), the catalase activity in C. oleifera leaves was enhanced to alleviate oxidative stress and protect the plant from Mn contamination. Our study demonstrated that 200 mg kg−1 of K fertilizer has the potential to further enhance the efficiency of Mn phytoremediation by C. oleifera.
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Claims 11
Claim · model-written summary
C. oleifera accumulated high amounts of Mn in both soil conditions.
- Taxon
- Camellia oleifera
Camellia oleiferat0 - Outcome
- accumulated high amounts of Mne0
- Setting
- both soil conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. oleifera accumulated high amounts of Mn in both soil conditions.”
t0“Camellia oleifera”
Claim · model-written summary
K fertilizer decreased soil pH.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- K fertilizere0
- Outcome
- soil pHe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of K fertilizer decreased the soil pH and promoted Mn accumulation in C. oleifera.”
t0“Camellia oleifera”
Claim · model-written summary
K fertilizer promoted Mn accumulation in C. oleifera.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- K fertilizere0
- Outcome
- Mn accumulation in C. oleiferae0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of K fertilizer decreased the soil pH and promoted Mn accumulation in C. oleifera.”
t0“Camellia oleifera”
Claim · model-written summary
High K fertilization at 400 mg kg−1 significantly decreased plant biomass.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- high level of K fertilization (400 mg kg−1)e0
- Outcome
- plant biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plant biomass decreased significantly under the high level of K fertilization (400 mg kg−1)”
t0“Camellia oleifera”
Claim · model-written summary
Mn contamination stimulated oxidative stress.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- Mn contaminatione0
- Outcome
- oxidative stresse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the oxidative stress was stimulated under Mn contamination”
t0“Camellia oleifera”
Claim · model-written summary
K fertilizer at 200 mg kg−1 supported photosynthesis pigment formation.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- K fertilizer (200 mg kg−1)e0
- Outcome
- formation of photosynthesis pigmentse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an appropriate concentration of K fertilizer (200 mg kg−1) was necessary for the formation of photosynthesis pigments, nonenzymatic antioxidants and antioxidant enzymes, metabolic processes, and nutrient uptake.”
t0“Camellia oleifera”
Claim · model-written summary
K fertilizer at 200 mg kg−1 supported nonenzymatic antioxidants and antioxidant enzymes.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- K fertilizer (200 mg kg−1)e0
- Outcome
- nonenzymatic antioxidants and antioxidant enzymese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an appropriate concentration of K fertilizer (200 mg kg−1) was necessary for the formation of photosynthesis pigments, nonenzymatic antioxidants and antioxidant enzymes, metabolic processes, and nutrient uptake.”
t0“Camellia oleifera”
Claim · model-written summary
K fertilizer at 200 mg kg−1 supported metabolic processes and nutrient uptake.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- K fertilizer (200 mg kg−1)e0
- Outcome
- metabolic processes, and nutrient uptakee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an appropriate concentration of K fertilizer (200 mg kg−1) was necessary for the formation of photosynthesis pigments, nonenzymatic antioxidants and antioxidant enzymes, metabolic processes, and nutrient uptake.”
t0“Camellia oleifera”
Claim · model-written summary
K fertilization at 200 mg kg−1 enhanced leaf catalase activity.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Organ / stage
- leavese0
- Treatment
- K fertilization (200 mg kg−1)e0
- Outcome
- catalase activity in C. oleifera leavese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when plants supplemented with a low level of K fertilization (200 mg kg−1), the catalase activity in C. oleifera leaves was enhanced”
t0“Camellia oleifera”
Claim · model-written summary
Enhanced leaf catalase activity alleviated oxidative stress and protected the plant under Mn contamination.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Organ / stage
- leavese0
- Gene
- catalasee0
- Outcome
- alleviate oxidative stress and protect the plant from Mn contaminatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the catalase activity in C. oleifera leaves was enhanced to alleviate oxidative stress and protect the plant from Mn contamination”
t0“Camellia oleifera”
Claim · model-written summary
The authors suggest 200 mg kg−1 K fertilizer could improve Mn phytoremediation efficiency.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- 200 mg kg−1 of K fertilizere0
- Outcome
- enhance the efficiency of Mn phytoremediatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“200 mg kg−1 of K fertilizer has the potential to further enhance the efficiency of Mn phytoremediation by C. oleifera”
t0“Camellia oleifera”
The same questions in other papers
fertilization · nutrient: content · Camellia oleifera (tea-oil Camellia)Positive and negative results
3 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →fertilization · growth · Camellia oleifera (tea-oil Camellia)Positive and negative results
13 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →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.