Abstract
Two solution culture experiments We1'e conducted to stt,d)' the effects of toxic concentrations of H and aluminium on. nOllsymbiotic growth ojgroundnut (Arachis hypogaea L.) cu. Maljam. TheJive pH lroels used were 3,5, 4,0, 4.8.5.5 and 6.5, and the sum of activities o/monomeric Al species (LaM_"/I) were 0. 1.5. 3.0, 15,35 and 80 I'-M at pH 4.3. The H' iOIl concentratian at pH 3.5 did not aiJed top dry weight but markedly decreased root d,)' weight and kngth. Raisillg the solution pH 10 4.0 illlp1VlJed the grawth oj roots. The pH level recom-mended Jar growth of groundnut was ~ 4.4. The non-toxic concentration of aluminium for growth of groundnut and mot elongation was ~ 12.2 p,M La,u_",,(==: 17.1 J..L1W monomeric-Al or 20.3 J-LM monomeric total-Ai). Increasing the };a-\/Jfl""/I to 80 J..LM decreased the magnesium concentration in the youngest expanded leaf (YeL) to 0.18%. a value known to be deficient for groundnut. J\1agnesium concentmtion in the YEL was more sensitive to aluminium. toxicity than magnesium concentration in the roots. Tlu! results also showed that root dry weight and root length ·responded positively to low concentrations oj aluminium (1.5 1·L1W ~aAI,""'i"); this effect was not observed for dry' weight oj tops
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Claims 3
Claim · model-written summary
Low aluminium concentrations increased root dry weight and root length of groundnut.
- Taxon
- Groundnut
Arachis hypogaeat0 - Treatment
- aluminiume1
- Outcome
- root dry weight and root lengthe2
- Direction
- responded positivelye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Groundnut”
e1“responded positively to low concentrations oj aluminium”
e2“root dry weight and root length”
Claim · model-written summary
The pH level recommended for groundnut growth is about 4.4.
- Taxon
- GroundnutArachis hypogaeat0
- Outcome
- growthe3
- Value
- ~ 4.4e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Groundnut”
e3“growth of groundnut was ~ 4.4”
Claim · model-written summary
Increasing aluminium decreased magnesium concentration in the youngest expanded leaf of groundnut to 0.18%.
- Taxon
- GroundnutArachis hypogaeat0
- Organ / stage
- youngest expanded leafe4
- Outcome
- magnesium concentratione4
- Direction
- decreasede4
- Value
- 0.18%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Groundnut”
e4“decreased the magnesium concentration in the youngest expanded leaf (YeL) to 0.18%”
The same questions in other papers
aluminium atom · growth · Arachis hypogaea (peanut)Positive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
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See all 8 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.