Abstract
The effect of the zinc (Zn) and high irradiance (HI) on growth, lipid peroxidation (MDA), membrane permeability (EC), hydrogen peroxide (H2O2), proline and ascorbic acid (AsA) and activities of antioxidant enzymes (superoxide dismutase, SOD; peroxidase, POX; polyphenol oxidase, PPO) have been investigated in cowpea plants grown in half strength Hoagland solution. A signicant decrease in root and shoot length and fresh and dry weight of leaf, shoot and root was detected in Zn-excess plants. Under Zn and HI stress, significant increase in EC, MDA and H2O2 were observed under Zn-deficient (0 ppm) and Zn-excess (50 ppm). The SOD activity significantly increased both in Zn-deficient and Zn-excess leaves under Zn and HI stress. Under Zn and HI stress, the antioxidant enzyme activities, POX and PPO and AsA and proline accumulation were found to be significantly decreased in the Zn-excess leaves than in the Zn-sufficient (5 ppm) which showed the susceptibility and inability of the cowpea plant to tolerate the excess level of Zn and HI stress. Further, a significant increase in MDA, H2O2, and EC with a simultaneous decrease in the antioxidant enzyme activities under Zndeficiency showed the inefficiency of the cowpea plant in response to Zn deficiency.
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Claims 5
Claim · model-written summary
Excess zinc significantly reduced cowpea root and shoot length and fresh and dry weights of leaf, shoot and root.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- Zn-excesse0
- Outcome
- root and shoot length and fresh and dry weight of leaf, shoot and roote0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A signicant decrease in root and shoot length and fresh and dry weight of leaf, shoot and root was detected in Zn-excess plants”
t0“Cowpea Plant”
Claim · model-written summary
Zinc deficiency and excess under high irradiance significantly increased membrane permeability, lipid peroxidation and hydrogen peroxide.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Zn and HI stresse0
- Outcome
- EC, MDA and H2O2e0
- Direction
- increasee0
- Qualifier
- Zn-deficient (0 ppm) and Zn-excess (50 ppm)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Zn and HI stress, significant increase in EC, MDA and H2O2 were observed under Zn-deficient (0 ppm) and Zn-excess (50 ppm)”
t0“Cowpea Plant”
Claim · model-written summary
SOD activity significantly increased in both zinc deficient and zinc excess cowpea leaves under zinc and high irradiance stress.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- leavese0
- Treatment
- Zn and HI stresse0
- Outcome
- SOD activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SOD activity significantly increased both in Zn-deficient and Zn-excess leaves under Zn and HI stress”
t0“Cowpea Plant”
Claim · model-written summary
POX and PPO activities and AsA and proline accumulation were significantly lower in zinc excess leaves than zinc sufficient leaves under zinc and high irradiance.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- leavese0
- Treatment
- Zn and HI stresse0
- Outcome
- POX and PPO and AsA and proline accumulatione0
- Direction
- decreasede0
- Comparator
- Zn-sufficient (5 ppm)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Zn and HI stress, the antioxidant enzyme activities, POX and PPO and AsA and proline accumulation were found to be significantly decreased in the Zn-excess leaves than in the Zn-sufficient (5 ppm)”
t0“Cowpea Plant”
Claim · model-written summary
Zinc deficiency significantly increased MDA, H2O2 and EC while decreasing antioxidant enzyme activities in cowpea.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Zndeficiencye0
- Outcome
- MDA, H2O2, and ECe0
- Direction
- increasee0
- Qualifier
- simultaneous decrease in the antioxidant enzyme activitiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant increase in MDA, H2O2, and EC with a simultaneous decrease in the antioxidant enzyme activities under Zndeficiency”
t0“Cowpea Plant”
The same questions in other papers
light · physiology: oxidative · Vigna unguiculata (cowpea)Positive and negative results
1 in the opposite direction
- positive
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.