Abstract
The heavy metals present in the environment accumulate in the plants and affect their productivity and yield. By entering the food chain, metals cause several serious health problems in human beings as well as in other organisms. Indole acetic acid (IAA) is known to act as a signaling molecule between symbiotic association of metal accumulating plants and plant growth promoting rhizobacteria (PGPR). Present study demonstrated a protective role of IAA against surplus Zinc (Zn)-induced toxicity to Hordeum vulgare seedlings. Elevated Zn concentrations suppressed the plant growth, caused a reduction in leaf relative water contents (RWC) and elevated free proline and non-protein thiols (NPT) accumulation. Zinc treatment also led to enhanced lipid peroxidation (MDA contents) as well as the activity of ascorbate peroxidase (APX), showing the involvement of antioxidative defense mechanism to reduce Zn induced toxicity. IAA oxidase activity was also observed to increase due to Zn treatment. IAA pretreatment of H. vulgare caryopsis could partly revert the Zn-induced toxicity in seedlings.
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Claims 8
Claim · model-written summary
Elevated zinc suppressed barley seedling growth.
- Taxon
- Hordeum vulgare
.jpg?width=60)
Hordeum vulgaree1 - Organ / stage
- seedlingse1
- Treatment
- Elevated Zn concentrationse0
- Outcome
- plant growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Elevated Zn concentrations suppressed the plant growth”
e1“Hordeum vulgare seedlings”
Claim · model-written summary
Elevated zinc reduced leaf relative water contents.
- Taxon
- Hordeum vulgareHordeum vulgaree1
- Treatment
- Elevated Zn concentrationse0
- Outcome
- leaf relative water contents (RWC)e0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated Zn concentrations suppressed the plant growth, caused a reduction in leaf relative water contents (RWC)”
e1“Hordeum vulgare seedlings”
Claim · model-written summary
Elevated zinc increased free proline accumulation.
- Taxon
- Hordeum vulgareHordeum vulgaree1
- Treatment
- Elevated Zn concentrationse0
- Outcome
- free prolinee0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated Zn concentrations suppressed the plant growth, caused a reduction in leaf relative water contents (RWC) and elevated free proline and non-protein thiols (NPT) accumulation.”
e1“Hordeum vulgare seedlings”
Claim · model-written summary
Elevated zinc increased non-protein thiol accumulation.
- Taxon
- Hordeum vulgareHordeum vulgaree2
- Treatment
- Elevated Zn concentrationse1
- Outcome
- non-protein thiols (NPT) accumulatione0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated free proline and non-protein thiols (NPT) accumulation”
e1“Elevated Zn concentrations”
e2“Hordeum vulgare seedlings”
Claim · model-written summary
Zinc treatment increased lipid peroxidation.
- Taxon
- Hordeum vulgareHordeum vulgaree1
- Treatment
- Zinc treatmente0
- Outcome
- lipid peroxidation (MDA contents)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc treatment also led to enhanced lipid peroxidation (MDA contents)”
e1“Hordeum vulgare seedlings”
Claim · model-written summary
Zinc treatment increased ascorbate peroxidase activity.
- Taxon
- Hordeum vulgareHordeum vulgaree1
- Treatment
- Zinc treatmente0
- Gene
- ascorbate peroxidase (APX)e0
- Outcome
- activity of ascorbate peroxidase (APX)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc treatment also led to enhanced lipid peroxidation (MDA contents) as well as the activity of ascorbate peroxidase (APX)”
e1“Hordeum vulgare seedlings”
Claim · model-written summary
Zinc treatment increased IAA oxidase activity.
- Taxon
- Hordeum vulgareHordeum vulgaree1
- Treatment
- Zn treatmente0
- Gene
- IAA oxidasee0
- Outcome
- IAA oxidase activitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA oxidase activity was also observed to increase due to Zn treatment.”
e1“Hordeum vulgare seedlings”
Claim · model-written summary
IAA pretreatment partly reversed zinc-induced toxicity in barley seedlings.
- Taxon
- H. vulgareHordeum vulgaree0
- Organ / stage
- caryopsise0
- Treatment
- IAA pretreatmente0
- Outcome
- Zn-induced toxicity in seedlingse0
- Direction
- reverte0
- Qualifier
- partlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA pretreatment of H. vulgare caryopsis could partly revert the Zn-induced toxicity in seedlings.”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.