Claim · model-written summary
Low nitrate reductase activity in sunflower leaves indicated dependence on roots for nitrate reduction.
- Taxon
- sunflower
Helianthus annuuse0 - Organ / stage
- sunflower leavese0
- Outcome
- low specific activitye0
- Qualifier
- dependency upon the roots for nitrate reductione0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low specific activity of this enzyme in sunflower leaves indicates a dependency upon the roots for nitrate reduction”
Title
Influence of Ammonium and Nitrate Nutrition on Enzymatic Activity in Soybean and Sunflower
Gerard S. Weissman PLANT PHYSIOLOGY 1972. doi:10.1104/pp.49.2.138
Other claims from this paper (17)
- Intervention effect Nitrate and ammonium supported young soybean growth equally at controlled pH.
- Intervention effect Nitrate and ammonium supported young sunflower growth equally at controlled pH.
- Observation Soybean had active nitrate reductase in roots and leaves.
- Association Leaf nitrate reductase activity tracked nitrate reductase distribution in nitrate-supplied soybean.
- Association Leaf nitrate reductase activity tracked nitrate reductase distribution in nitrate-supplied sunflower.
- Intervention effect Root glutamic acid dehydrogenase activity was greater under ammonium than nitrate in soybean.
- Intervention effect Root glutamic acid dehydrogenase activity was greater under ammonium than nitrate in sunflower.
- Observation Root glutamic acid dehydrogenase was NADH-dependent under ammonium and active with NADH and NADPH under nitrate in soybean.
- Observation Root glutamic acid dehydrogenase was NADH-dependent under ammonium and active with NADH and NADPH under nitrate in sunflower.
- Mechanism NADPH-dependent glutamic acid dehydrogenase appeared to assimilate leaf ammonia in soybean.
- Mechanism NADPH-dependent glutamic acid dehydrogenase appeared to assimilate leaf ammonia in sunflower.
- Observation Soybean roots incorporated ammonia into amides, much of which remained there.
- Observation Sunflower roots formed fewer amides but transferred much of the amides and ammonia to shoots.
- Observation Leaf glutamine synthetase activity was 20- to 40-fold lower than root activity in soybean.
- Observation Leaf glutamine synthetase activity was 20- to 40-fold lower than root activity in sunflower.
- Association Glucose-6-phosphate dehydrogenase activity correlated with root nitrate reduction but not leaf nitrate reduction in soybean.
- Association Glucose-6-phosphate dehydrogenase activity correlated with root nitrate reduction but not leaf nitrate reduction in sunflower.