Abstract
Few studies in Brazil have addressed the need for micronutrients of physic nut focusing on physiological responses, especially in terms of photosynthesis. The objective of this study was to evaluate the effects of omission of boron (B), copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) on Jatropha curcas L.. The experimental design was a randomized block with four replications. The treatments were complete solution (control) and solution without B, Cu, Fe, Mn, and Zn. We evaluated the chlorophyll content (SPAD units), photosynthetic rate, dry matter production and accumulation of micronutrients in plants, resulting from different treatments. The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed for Cu deficiency. The micronutrient omission reduced the dry matter yield, chlorophyll content and photosynthetic rate of the plants differently for each omitted nutrient. It was, however, the omission of Fe that most affected the development of this species in all parameters evaluated. The treatments negatively affected the chlorophyll content, evaluated in SPAD units, and the photosynthetic rate, except for the omission of B. However this result was probably due to the concentration effect, since there was a significant reduction in the dry matter production of B-deficient plants.
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Claims 9
Claim · model-written summary
Iron deficiency symptoms appeared first.
- Taxon
- Jatropha curcas L.
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Jatropha curcast0 - Treatment
- Fee0
- Outcome
- first signs of deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed for Cu deficiency.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Boron deficiency symptoms appeared first.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- Be0
- Outcome
- first signs of deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed for Cu deficiency.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Manganese deficiency symptoms appeared later.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- Mne0
- Outcome
- signs of deficiencye0
- Qualifier
- followed by Mn and Zne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed for Cu deficiency.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Zinc deficiency symptoms appeared later.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- Zne0
- Outcome
- signs of deficiencye0
- Qualifier
- followed by Mn and Zne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed for Cu deficiency.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Copper omission produced no observed deficiency symptoms.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- Cue0
- Outcome
- no symptomse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no symptoms were observed for Cu deficiency”
t0“on Jatropha curcas L.”
Claim · model-written summary
Micronutrient omission reduced dry matter yield.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- micronutrient omissione0
- Outcome
- dry matter yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The micronutrient omission reduced the dry matter yield, chlorophyll content and photosynthetic rate of the plants differently for each omitted nutrient.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Micronutrient omission reduced chlorophyll content and photosynthetic rate, with nutrient-specific effects.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- micronutrient omissione0
- Outcome
- chlorophyll content and photosynthetic ratee0
- Direction
- reducede0
- Qualifier
- differently for each omitted nutriente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The micronutrient omission reduced the dry matter yield, chlorophyll content and photosynthetic rate of the plants differently for each omitted nutrient.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Iron omission had the greatest effect on development across evaluated parameters.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- omission of Fee0
- Outcome
- developmente0
- Direction
- most affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the omission of Fe that most affected the development of this species in all parameters evaluated.”
t0“on Jatropha curcas L.”
Claim · model-written summary
Boron-deficient plants had a significant reduction in dry matter production.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- B-deficiente0
- Outcome
- dry matter productione0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant reduction in the dry matter production of B-deficient plants.”
t0“on Jatropha curcas L.”
The same questions in other papers
iron atom · growth · Jatropha curcasPositive and negative results
1 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
micronutrient · physiology: photosynthesis · Jatropha curcasPositive and negative results
1 in the opposite direction
- 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.