Abstract
This study aimed at comparing the growth and physiological changes in Jatropha curcas L. (jatropha or physic nut) young plants fertilized or not with a commercial product based on a micronutrient delivery system (MDS), under different doses of NPK. Measurements of growth, chlorophyll content, and leaf gas exchange were performed in the greenhouse, where plants were arranged in a split-split plot design. Plants were grown for 120 days in 3.9 L pots containing local soil, with or without MDS (main plot), combined with NPK doses (0; 1.8; 4.7 and 7.4 g L-1) in subplots. Dose-response curves showed that most variables were positively responsive to NPK doses in plants growing without MDS, whereas slight responses or even opposite behavior was observed in MDS-fertilized plants. MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots, increases in number of leaves and chlorophyll content, plant height, stem diameter, shoot and root dry weight, stomatal conductance, photosynthesis, leaf transpiration, and water use efficiency, as well as decreases in intercellular CO2 in the leaf and vapor-pressure deficit. The enhanced biomass allocation, photosynthesis and gas exchange in MDS-supplemented plants indicates the relevant role played by this fertilizer in jatropha metabolism, resulting in more vigorous plants.
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Claims 9
Claim · model-written summary
Without MDS, most variables responded positively to NPK dose.
- Taxon
- Jatropha curcas L.
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Jatropha curcase1 - Treatment
- NPK dosese0
- Outcome
- most variablese0
- Direction
- positively responsivee0
- Comparator
- without MDSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“most variables were positively responsive to NPK doses in plants growing without MDS”
e1“Jatropha curcas L.”
Claim · model-written summary
MDS-fertilized plants showed slight or opposite responses to NPK dose.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- NPK dosese2
- Outcome
- slight responses or even opposite behaviore0
- Comparator
- MDS-fertilized plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“slight responses or even opposite behavior was observed in MDS-fertilized plants”
e1“Jatropha curcas L.”
e2“responsive to NPK doses”
Claim · model-written summary
MDS at low NPK doses increased biomass allocation in leaves and roots.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- MDS application under low NPK dosese0
- Outcome
- biomass allocation in leaves and rootse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots”
e1“Jatropha curcas L.”
Claim · model-written summary
MDS at low NPK doses increased leaf number, height and stem diameter.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- MDS application under low NPK dosese0
- Outcome
- number of leaves and chlorophyll content, plant height, stem diametere0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots, increases in number of leaves and chlorophyll content, plant height, stem diameter, shoot and root dry weight, stomatal conductance, photosynthesis, leaf transpiration, and water use efficiency”
e1“Jatropha curcas L.”
Claim · model-written summary
MDS at low NPK doses increased shoot and root dry weight.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- MDS application under low NPK dosese0
- Outcome
- shoot and root dry weighte0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots, increases in number of leaves and chlorophyll content, plant height, stem diameter, shoot and root dry weight”
e1“Jatropha curcas L.”
Claim · model-written summary
MDS at low NPK doses increased stomatal conductance, photosynthesis and leaf transpiration.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- MDS application under low NPK dosese0
- Outcome
- stomatal conductance, photosynthesis, leaf transpiratione0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots, increases in number of leaves and chlorophyll content, plant height, stem diameter, shoot and root dry weight, stomatal conductance, photosynthesis, leaf transpiration, and water use efficiency”
e1“Jatropha curcas L.”
Claim · model-written summary
MDS at low NPK doses increased water use efficiency.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- MDS application under low NPK dosese0
- Outcome
- water use efficiencye0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots, increases in number of leaves and chlorophyll content, plant height, stem diameter, shoot and root dry weight, stomatal conductance, photosynthesis, leaf transpiration, and water use efficiency”
e1“Jatropha curcas L.”
Claim · model-written summary
MDS at low NPK doses decreased intercellular CO2 and vapor-pressure deficit.
- Taxon
- Jatropha curcas L.Jatropha curcase1
- Treatment
- MDS application under low NPK dosese0
- Outcome
- intercellular CO2 in the leaf and vapor-pressure deficite0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDS application under low NPK doses resulted in higher biomass allocation in leaves and roots, increases in number of leaves and chlorophyll content, plant height, stem diameter, shoot and root dry weight, stomatal conductance, photosynthesis, leaf transpiration, and water use efficiency, as well as decreases in intercellular CO2 in the leaf and vapor-pressure deficit.”
e1“Jatropha curcas L.”
Claim · model-written summary
The authors interpret MDS-associated physiology as producing more vigorous jatropha plants.
- Treatment
- MDS-supplementede0
- Outcome
- more vigorous plantse0
- Qualifier
- enhanced biomass allocation, photosynthesis and gas exchangee0
JatrophaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enhanced biomass allocation, photosynthesis and gas exchange in MDS-supplemented plants indicates the relevant role played by this fertilizer in jatropha metabolism, resulting in more vigorous plants.”
The same questions in other papers
micronutrient · physiology: photosynthesis · Jatropha curcasPositive and negative results
1 in the opposite direction
- negative
fertilization · growth · Jatropha curcasPositive and negative results
21 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
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1 paper in the same direction as this paper
- positive
fertilization · physiology: pigments · Jatropha curcasResults agree
1 paper in the same direction as this paper
- positive
fertilization · physiology: photosynthesis · Jatropha curcasResults agree
1 paper in the same direction as this paper
- 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.