Claim · model-written summary
Zinc deficiency lowered the zinc concentration in sunflower leaves.
- Taxon
- Sunflower
Helianthus annuuse0 - Material
- Jwala Mukhie0
- Organ / stage
- leavese1
- Treatment
- Zinc deficiencye1
- Outcome
- concentration of zince1
- Direction
- lowerede1
- Setting
- refined sande0
Not reportedGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) cv. Jwala Mukhi was grown until maturity in refined sand”
e1“Zinc deficiency lowered the concentration of zinc and increased that of phosphorus in leaves”
Title
Influence of variable zinc on yield, oil content, and physiology of sunflower
Neena Khurana; Chitralekha Chatterjee Communications in Soil Science and Plant Analysis 2001. doi:10.1081/css-120001104
Other claims from this paper (14)
- Intervention effect Both low and high zinc supply depressed sunflower growth relative to adequate zinc (0.065 mg Zn L−1).
- Observation Foliar zinc deficiency symptoms appeared on mature middle and old leaves of sunflower at 0.00065 and 0.0065 mg Zn L−1.
- Intervention effect Biomass, capitulum size and seed number were lowered significantly in both zinc deficiency and excess relative to adequate zinc.
- Intervention effect Seed weight was lowered significantly in both zinc deficiency and excess relative to adequate zinc.
- Intervention effect Chlorophyll a and b concentration and soluble protein were lowered significantly in both zinc deficiency and excess relative to adequate zinc.
- Association Zinc increase from low to high increased carbonic anhydrase activity in sunflower leaves, up to 6.5 mg Zn L−1.
- Association Zinc increase from low to high decreased acid phosphatase activity in sunflower leaves.
- Association Zinc deficiency increased the phosphorus concentration in sunflower leaves.
- Association Seed oil content of sunflower was highest (23.4%) at 0.65 mg Zn L−1.
- Intervention effect Zinc excess reduced seed oil content of sunflower more than zinc deficiency did.
- Observation Tissue zinc concentration associated with deficiency in sunflower leaves was 20 μg g−1 dry matter.
- Observation Threshold of zinc deficiency in sunflower leaves was 30 μg g−1 dry matter.
- Observation Threshold of zinc toxicity in sunflower leaves was 190 μg g−1 dry matter.
- Observation Zinc toxicity in sunflower leaves was reached at 240 μg g−1 dry matter.