Abstract
The protective role of melatonin in plants against various abiotic stresses have been widely demonstrated, but poorly explored in organ-specific responses and the transmission of melatonin signals across organs. In this study, the effects of melatonin with the root-irrigation method and the leaf-spraying method on the antioxidant system and photosynthetic machinery in maize seedlings under drought stress were investigated. The results showed that drought stress led to the rise in reactive oxygen species (ROS), severe cell death, and degradation of D1 protein, which were mitigated by the melatonin application. The application of melatonin improved the photosynthetic activities and alleviated the oxidative damages of maize seedlings under the drought stress. Compared with the leaf-spraying method, the root-irrigation method was more effective on enhancing drought tolerance. Moreover, maize seedlings made organ-specific physiological responses to the drought stress, and the physiological effects of melatonin varied with the dosage, application methods and plant organs. The signals of exogenous melatonin received by roots could affect the stress responses of leaves, and the melatonin signals perceived by leaves also led to changes in physiological metabolisms in roots under the stress. Consequently, the whole seedlings coordinated the different parts and made a systemic acclimation against the drought stress. Melatonin as a protective agent against abiotic stresses has a potential application prospect in the agricultural industry.
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Claims 12
Claim · model-written summary
Drought increased reactive oxygen species in maize seedlings.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress led to the rise in reactive oxygen species (ROS), severe cell death, and degradation of D1 protein”
e1“maize seedlings under drought stress”
Claim · model-written summary
Drought caused severe cell death in maize seedlings.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress led to the rise in reactive oxygen species (ROS), severe cell death, and degradation of D1 protein”
e1“maize seedlings under drought stress”
Claim · model-written summary
Drought caused D1 protein degradation in maize seedlings.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress led to the rise in reactive oxygen species (ROS), severe cell death, and degradation of D1 protein”
e1“maize seedlings under drought stress”
Claim · model-written summary
Melatonin mitigated drought-induced ROS rise, cell death and D1 degradation.
- Treatment
- melatonin applicatione0
- Outcome
- reactive oxygen species (ROS), severe cell death, and degradation of D1 proteine0
- Direction
- mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress led to the rise in reactive oxygen species (ROS), severe cell death, and degradation of D1 protein, which were mitigated by the melatonin application.”
e1“maize seedlings under drought stress”
Claim · model-written summary
Melatonin improved maize photosynthetic activities under drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of melatonin improved the photosynthetic activities and alleviated the oxidative damages of maize seedlings under the drought stress.”
Claim · model-written summary
Melatonin alleviated oxidative damage in maize under drought.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of melatonin improved the photosynthetic activities and alleviated the oxidative damages of maize seedlings under the drought stress.”
Claim · model-written summary
Root irrigation enhanced drought tolerance more effectively than leaf spraying.
- Treatment
- root-irrigation methode0
- Outcome
- drought tolerancee0
- Direction
- more effectivee0
- Comparator
- leaf-spraying methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the leaf-spraying method, the root-irrigation method was more effective on enhancing drought tolerance.”
e1“maize seedlings under drought stress”
Claim · model-written summary
Maize seedlings showed organ-specific physiological responses to drought.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize seedlings made organ-specific physiological responses to the drought stress”
Claim · model-written summary
Melatonin physiological effects varied with dose, application route and organ.
- Organ / stage
- plant organse0
- Treatment
- dosage, application methodse0
- Outcome
- physiological effects of melatonine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the physiological effects of melatonin varied with the dosage, application methods and plant organs.”
e1“Maize Seedlings Under Drought Stress”
Claim · model-written summary
Root-received melatonin signals affected leaf stress responses.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The signals of exogenous melatonin received by roots could affect the stress responses of leaves”
e1“Maize Seedlings Under Drought Stress”
Claim · model-written summary
Leaf-perceived melatonin signals changed root physiological metabolism under stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melatonin signals perceived by leaves also led to changes in physiological metabolisms in roots under the stress.”
e1“Maize Seedlings Under Drought Stress”
Claim · model-written summary
Maize seedlings coordinated organ responses for systemic drought acclimation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the whole seedlings coordinated the different parts and made a systemic acclimation against the drought stress.”
e1“Maize Seedlings Under Drought Stress”
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