Claim · model-written summary
Low leaf phosphate status markedly reduced leaf sugar phosphate levels (per leaf area) throughout the diurnal cycle in sugar beet.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Treatment
- low-P treatmente0
- Outcome
- levels of leaf sugar phosphatese0
- Direction
- reductione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sugar Beet”
e0“low-P treatment caused a marked reduction in the levels of leaf sugar phosphates (on a leaf area basis) throughout the diurnal cycle”
Title
Leaf Phosphate Status, Photosynthesis and Carbon Partitioning in Sugar Beet
I. Madhusudana Rao; A. Raviraj Arulanantham; Norman Terry PLANT PHYSIOLOGY 1989. doi:10.1104/pp.90.3.820
Other claims from this paper (11)
- Intervention effect Triose phosphate was the exception: its level was not reduced by low-P treatment.
- Intervention effect Low-P treatment decreased average leaf RuBP levels by 60 to 69% of control values during the light period.
- Intervention effect Low-P increased NADPH levels and the NADPH/NADP+ ratio.
- Intervention effect Low-P decreased ATP levels.
- Intervention effect The ATP/ADP ratio was unaffected by low-P.
- Intervention effect Low P treatment caused a marked reduction in RuBP regeneration.
- Observation Under low P, RuBP levels were half the RuBP carboxylase binding site concentration.
- Intervention effect Low P treatment did not depress PGA reduction to triose phosphate.
- Mechanism The authors conclude that photosynthesis in low-P leaves was limited by RuBP regeneration.
- Mechanism The authors conclude that RuBP formation in low-P leaves was not limited by the supply of ATP and NADPH.
- Mechanism The authors suggest that RuBP regeneration was limited by the supply of fixed carbon, an increased proportion of which was diverted to starch synthesis.