Claim · model-written summary
Excreted malic acid depended on external Al concentration.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- external Al concentratione0
- Outcome
- amount of malic acid excretede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of malic acid excreted was dependent on the external Al concentration”
t0“Wheat (Triticum aestivum L.)”
Title
E. Delhaize; P. R. Ryan; P. J. Randall PLANT PHYSIOLOGY 1993. doi:10.1104/pp.103.3.695
Other claims from this paper (14)
- Intervention effect Al stimulated excretion of malic and succinic acids from wheat seedling roots.
- Observation Al-tolerant genotypes excreted 5- to 10-fold more malic acid than sensitive genotypes.
- Observation Malic acid excretion was detectable after 15 minutes at 200 μM Al.
- Observation Malic acid excretion increased linearly over 24 hours.
- Intervention effect As little as 10 μM Al stimulated excretion.
- Intervention effect Added malic acid protected Al-sensitive seedlings from phytotoxic aluminum.
- Observation Root apices were the main source of excreted malic acid.
- Observation Tolerant and sensitive root apices had similar malic acid amounts before and after Al exposure.
- Observation Tolerant seedlings excreted about four times their initial root apex malic acid during treatment.
- Mechanism The excretion amount indicated continual malic acid synthesis.
- Intervention effect Al specifically stimulated malic acid excretion.
- Intervention effect La, Fe, and absence of Pi did not elicit malic acid excretion.
- Association Al tolerance correlated consistently with high Al-stimulated malic acid excretion.
- Mechanism The authors hypothesized that Alt1 encodes a tolerance mechanism involving Al-stimulated malic acid excretion.