Abstract
Abstract The effect of Al on the growth and chemical composition of onions (Allium cepa L. cv Pukekohe longkeeper), asparagus (Asparagus officinalis L. cv Lucullus) and squash (Cucurbita maxima L. cv Delica) was investigated using a low ionic strength solution‐culture technique. Onions and asparagus were sensitive to Al while squash was relatively tolerant. The dry matter yields of onion, asparagus and squash tops were reduced 50% by 5, 3, and 26 μM Al in the solution, respectively. Similarly, root dry matter yields were reduced 50% by 1, 5, and 26 μM Al, respectivley. Aluminium reduced the concentration of macro nutrients in both asparagus and onion tops but had no consistent effect on squash tops. Plant analysis and visible symptoms indicated that Al affected magnesium nutrition more than that of any other nutrient. The roots of squash showed an ability to recover from Al stress by modifying their morphology. However, this effect was insufficient to totally alleviate Al toxicity. Squash also became more sensitive to Al as the growing period progressed. These observations suggest that care is needed in using short term experiments to assess Al tolerance for some species.
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Claims 17
Claim · model-written summary
Onions were sensitive to Al.
- Taxon
- Onions
Allium cepae0 - Outcome
- sensitive to Ale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onions and asparagus were sensitive to Al while squash was relatively tolerant.”
Claim · model-written summary
Asparagus was sensitive to Al.
- Outcome
- sensitive to Ale0
AsparagusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onions and asparagus were sensitive to Al while squash was relatively tolerant.”
Claim · model-written summary
Squash was relatively tolerant of Al.
Verbatim
e0“Onions and asparagus were sensitive to Al while squash was relatively tolerant.”
Claim · model-written summary
Onion top dry matter yield fell 50% at 5 μM Al.
- Taxon
- onionAllium cepae0
- Treatment
- 5, 3, and 26 μM Ale0
- Outcome
- dry matter yields of onion, asparagus and squash topse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry matter yields of onion, asparagus and squash tops were reduced 50% by 5, 3, and 26 μM Al in the solution, respectively.”
Claim · model-written summary
Asparagus top dry matter yield fell 50% at 3 μM Al.
- Treatment
- 5, 3, and 26 μM Ale0
- Outcome
- dry matter yields of onion, asparagus and squash topse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry matter yields of onion, asparagus and squash tops were reduced 50% by 5, 3, and 26 μM Al in the solution, respectively.”
Claim · model-written summary
Squash top dry matter yield fell 50% at 26 μM Al.
- Taxon
- squashe0
- Treatment
- 5, 3, and 26 μM Ale0
- Outcome
- dry matter yields of onion, asparagus and squash topse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Verbatim
e0“The dry matter yields of onion, asparagus and squash tops were reduced 50% by 5, 3, and 26 μM Al in the solution, respectively.”
Claim · model-written summary
Onion root dry matter yield fell 50% at 1 μM Al.
- Taxon
- onionsAllium cepat0
- Treatment
- 1, 5, and 26 μM Ale0
- Outcome
- root dry matter yieldse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onions, asparagus and squash”
e0“root dry matter yields were reduced 50% by 1, 5, and 26 μM Al, respectivley.”
Claim · model-written summary
Asparagus root dry matter yield fell 50% at 5 μM Al.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onions, asparagus and squash”
e0“root dry matter yields were reduced 50% by 1, 5, and 26 μM Al, respectivley.”
Claim · model-written summary
Squash root dry matter yield fell 50% at 26 μM Al.
- Taxon
- squasht0
- Treatment
- 1, 5, and 26 μM Ale0
- Outcome
- root dry matter yieldse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Verbatim
t0“onions, asparagus and squash”
e0“root dry matter yields were reduced 50% by 1, 5, and 26 μM Al, respectivley.”
Claim · model-written summary
Al reduced macronutrient concentration in asparagus tops.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminium reduced the concentration of macro nutrients in both asparagus and onion tops”
Claim · model-written summary
Al reduced macronutrient concentration in onion tops.
- Taxon
- onionAllium cepae0
- Treatment
- Aluminiume0
- Outcome
- concentration of macro nutrientse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminium reduced the concentration of macro nutrients in both asparagus and onion tops”
Claim · model-written summary
Al had no consistent effect on squash top macronutrients.
Not reportedComparator
Verbatim
e0“Aluminium reduced the concentration of macro nutrients in both asparagus and onion tops but had no consistent effect on squash tops.”
Claim · model-written summary
Al affected magnesium nutrition more than other nutrients.
Verbatim
e0“Plant analysis and visible symptoms indicated that Al affected magnesium nutrition more than that of any other nutrient.”
t0“onions, asparagus and squash”
Claim · model-written summary
Squash roots modified morphology during recovery from Al stress.
Verbatim
e0“The roots of squash showed an ability to recover from Al stress by modifying their morphology.”
Claim · model-written summary
Morphological recovery did not fully alleviate squash Al toxicity.
Verbatim
t0“squash”
e0“However, this effect was insufficient to totally alleviate Al toxicity.”
Claim · model-written summary
Squash became more sensitive to Al as growth proceeded.
Verbatim
e0“Squash also became more sensitive to Al as the growing period progressed.”
Claim · model-written summary
The authors advise care with short term Al tolerance experiments.
Verbatim
t0“onions, asparagus and squash”
e0“care is needed in using short term experiments to assess Al tolerance for some species.”
The same questions in other papers
aluminium atom · yield · Cucurbita (pumpkins)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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.