Abstract
Abstract Iron deficiency symptoms are commonly observed in avocado groves grown on calcareous soils. The uptake of iron by avocado at various levels of NO3 and Cl in the nutrient solution was studied. Avocado seedlings were grown for 126 days in 10 L containers filled with sand and flushed with complete nutrient solutions containing 2, 4, 8 or 16 mM Cl. Each level of Cl was combined with 2,8 or 16 mM NO3, at a constant ratio of Mg:Ca:K of 1:5:2 in charge equivalents. An increase in the NO3 concentration in the nutrient solution led to a decrease in uptake and accumulation of Cl in the leaves. Fe‐defíciency chlorosis of the young leaves was induced and increased with time in the low Cl:high NO3 treatments. Increased concentration of Cl salts in the nutrient solution prevented the development of chlorosis and enhanced Fe content in the leaves.
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Claims 5
Claim · model-written summary
Increasing nitrate decreased chloride uptake and leaf accumulation.
- Taxon
- avocado
Persea americanat0 - Treatment
- increase in the NO3 concentration in the nutrient solutione0
- Outcome
- uptake and accumulation of Cl in the leavese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in the NO3 concentration in the nutrient solution led to a decrease in uptake and accumulation of Cl in the leaves.”
t0“avocado”
Claim · model-written summary
Low chloride and high nitrate induced iron deficiency chlorosis in young leaves.
- Taxon
- avocadoPersea americanat0
- Organ / stage
- young leavese0
- Treatment
- low Cl:high NO3 treatmentse0
- Outcome
- Fe‐defíciency chlorosis of the young leavese0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fe‐defíciency chlorosis of the young leaves was induced and increased with time in the low Cl:high NO3 treatments.”
t0“avocado”
Claim · model-written summary
Chlorosis increased over time under low chloride and high nitrate.
- Taxon
- avocadoPersea americanat0
- Treatment
- low Cl:high NO3 treatmentse0
- Outcome
- chlorosis of the young leavese0
- Direction
- increasede0
- Qualifier
- with timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorosis of the young leaves was induced and increased with time in the low Cl:high NO3 treatments.”
t0“avocado”
Claim · model-written summary
Increasing chloride salts prevented chlorosis development.
- Taxon
- avocadoPersea americanat0
- Treatment
- Increased concentration of Cl salts in the nutrient solutione0
- Outcome
- development of chlorosise0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased concentration of Cl salts in the nutrient solution prevented the development of chlorosis”
t0“avocado”
Claim · model-written summary
Increasing chloride salts enhanced leaf iron content.
- Taxon
- avocadoPersea americanat0
- Treatment
- Increased concentration of Cl salts in the nutrient solutione0
- Outcome
- Fe content in the leavese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased concentration of Cl salts in the nutrient solution prevented the development of chlorosis and enhanced Fe content in the leaves.”
t0“avocado”
The same questions in other papers
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fertilization · nutrient: content · Persea americana (avocado)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
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1 paper more in this group
See all 5 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.