Claim · model-written summary
IAA lessened copper toxicity in sunflower roots, increasing root length and root hair formation.
- Taxon
- sunflower
Helianthus annuuse1 - Organ / stage
- rootse0
- Treatment
- 100 μM IAAe0
- Outcome
- root length and root hair formatione0
- Direction
- greatere0
- Comparator
- 80 μM Cue0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 100 μM IAA lessened the toxic effects of 80 μM Cu in roots indicating greater root length and root hair formation”
e1“sunflower (Helianthus annuus L.)”
Title
Hormone-induced protection of sunflower photosynthetic apparatus against copper toxicity
G. Ouzounidou; I. Ilias Biologia Plantarum 2005. doi:10.1007/s10535-005-3228-y
Other claims from this paper (11)
- Intervention effect GA3 ameliorated copper toxicity mainly in sunflower shoots.
- Intervention effect Copper stress significantly reduced photosynthetic pigment content in sunflower.
- Intervention effect Hormone application preserved sunflower chlorophylls and carotenoids under copper stress.
- Intervention effect Copper stress reduced the rate constant of energy trapping by sunflower photosystem 2 reaction centres.
- Mechanism Physical dissociation of the light-harvesting complex from photosystem 2 core was proposed to explain reduced energy trapping under copper stress.
- Intervention effect IAA and especially GA3 stabilized the sunflower photosystem 2 light-harvesting complex.
- Intervention effect Copper stress lowered sunflower net photosynthetic and transpiration rates.
- Intervention effect The variable to maximum fluorescence ratio was preserved or slightly reduced in sunflower exposed to copper.
- Mechanism Possible inhibition of Calvin cycle enzymes was proposed to explain the photosynthetic response to copper.
- Intervention effect IAA and GA3 lessened copper effects mainly on sunflower net photosynthesis.
- Intervention effect Hormone exposure improved sunflower water use efficiency.