Claim · model-written summary
High pH in the nutrient solution induced Fe deficiency chlorosis in sunflower at low Fe supply.
- Taxon
- sunflower
Helianthus annuuse1 - Material
- Farnkasole1
- Treatment
- high pH in the nutrient solutione2
- Outcome
- Fe deficiency chlorosise2
- Direction
- inducede2
- Qualifier
- at low Fe supplye2
- Setting
- nutrient solutionse1
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“sunflower (Helianthus annuus L. cv Farnkasol) plants were grown in nutrient solutions supplied with various nitrogen (N) forms (NO(3)(-), NH(4)(+) and NH(4)NO(3)), with or without pH control by using pH buffers”
e2“It was shown that high pH in the nutrient solution restricted uptake and shoot translocation of Fe independently of N form and, therefore, induced Fe deficiency chlorosis at low Fe supply”
Title
イギリスにおけるホスピス・ボランティアの教育・訓練に関する研究
隆志 佐々木 Medical Entomology and Zoology 2004. doi:10.1104/pp.102.017889
Other claims from this paper (7)
- Intervention effect High pH in the nutrient solution restricted Fe uptake and shoot translocation in sunflower, independently of N form.
- Intervention effect Root nitrate supply up to 40 mM did not affect the relative distribution of Fe between leaf apoplast and symplast in sunflower at constant low external pH.
- Intervention effect Perfusion of high pH-buffered solution (7.0) into the leaf apoplast restricted 59Fe uptake rate in sunflower compared with low apoplastic pH (5.0 and 6.0).
- Intervention effect Loading of nitrate (6 mM) into the sunflower leaf apoplast showed no effect on 59Fe uptake by the leaf cell symplast.
- Intervention effect High light intensity strongly increased 59Fe uptake in sunflower, independently of apoplastic pH or apoplastic nitrate.
- Intervention effect The study found no indications that nitrate supply to sunflower roots inactivates Fe in the leaf apoplast.
- Mechanism Nitrate nutrition causes Fe deficiency chlorosis in sunflower exclusively by inhibited Fe acquisition by roots due to high pH at the root surface.