Abstract
Coronatine is a phytotoxin that affects the accumulation of defence-related metabolites in plants but information on how its effects may be mediated by environmental stress is scanty. An experiment was carried out to determine the changes in growth, gas exchange, relative water content, chlorophyll (Chl) content, antioxidant enzymes and lipid peroxidation in maize (Zea mays L., var. ‘Nongda 3138’) seedlings treated with coronatine under simulated drought stress. Seedlings raised hydroponically in a growth chamber with simulated drought for 8d (long-period drought) or 3d (short-period drought) were treated with or without coronatine at the three-leaf stage. Under the drought condition, treated with coronatine significantly increased the fresh weight and relative water content in leaves of seedling leaves. The increase was accompanied by increased rates of photosynthesis and transpiration, and the maintenance of Chl pigments. Coronatine had no effects on catalase (CAT), guaiacol peroxidase (POD) and glutathione reductase (GR) under normal condition, but it significantly enhanced activities of CAT, POD and GR in stressed seedlings under the long-period drought treatment. Under the short-period drought treatment, the POD and GR activity in the seedlings treated with coronatine were much higher than in those not treated. Malondialdehyde (MDA) increased sharply under drought condition, but treatment with coronatine significantly reduced it by 15%. The total Chl content of leaves under the drought condition was markedly increased by the treatment with coronatine. Seedlings subjected to a short-period drought had reduced water content, but recovered fairly well by the treatment with coronatine with negligible effects on most physiological and biochemical processes. The application of coronatine alleviated the drought stress in maize seedlings and enhanced their tolerance of water stress through changes in physiological and anti-oxidant enzyme activities.
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Claims 12
Claim · model-written summary
Coronatine raised seedling leaf fresh weight and relative water content under drought.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the drought condition, treated with coronatine significantly increased the fresh weight and relative water content in leaves of seedling leaves”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Coronatine raised photosynthesis and transpiration rates under drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased rates of photosynthesis and transpiration”
t0“Maize (Zea mays L.)”
t1“Coronatine”
Claim · model-written summary
Coronatine maintained chlorophyll pigments.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maintenance of Chl pigments”
t0“Maize (Zea mays L.)”
t1“Coronatine”
Claim · model-written summary
Coronatine had no effect on CAT, POD and GR in normal conditions.
- Treatment
- Coronatinee0
- Outcome
- catalase (CAT), guaiacol peroxidase (POD) and glutathione reductase (GR)e0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coronatine had no effects on catalase (CAT), guaiacol peroxidase (POD) and glutathione reductase (GR) under normal condition”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Coronatine enhanced CAT, POD and GR under long drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly enhanced activities of CAT, POD and GR in stressed seedlings under the long-period drought treatment”
t0“Maize (Zea mays L.)”
t1“Coronatine”
Claim · model-written summary
Coronatine raised POD and GR under short drought versus untreated seedlings.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD and GR activity in the seedlings treated with coronatine were much higher than in those not treated”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Malondialdehyde increased sharply under drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Malondialdehyde (MDA) increased sharply under drought condition”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Coronatine reduced malondialdehyde by 15% under drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with coronatine significantly reduced it by 15%”
t0“Maize (Zea mays L.)”
e1“Malondialdehyde (MDA) increased sharply under drought condition”
Claim · model-written summary
Coronatine markedly raised leaf total chlorophyll under drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total Chl content of leaves under the drought condition was markedly increased by the treatment with coronatine”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Short drought reduced seedling water content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings subjected to a short-period drought had reduced water content”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Coronatine restored water content after short drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recovered fairly well by the treatment with coronatine”
t0“Maize (Zea mays L.)”
e1“Seedlings subjected to a short-period drought had reduced water content”
Claim · model-written summary
Authors concluded coronatine alleviated drought stress and enhanced water stress tolerance.
- Treatment
- coronatinee0
- Outcome
- tolerance of water stresse0
- Qualifier
- through changes in physiological and anti-oxidant enzyme activitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of coronatine alleviated the drought stress in maize seedlings and enhanced their tolerance of water stress through changes in physiological and anti-oxidant enzyme activities”
The same questions in other papers
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Coronatine · physiology: water · Zea mays (maize)Results agree
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- positive
- positive
Coronatine · physiology: photosynthesis · Zea mays (maize)Results agree
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See all 96 papers →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.