Abstract
Abscisic acid (ABA) is an important plant hormone and may be involved in drought resistance in crops. The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated. Two wheat cultivars, Yumai 949 and Shaanmai 5 in grain filling stage were drought stressed by PEG for 72 h. The results showed a marked decrease in relative water contents (RWC), chlorophyll contents, and yield, along with a significant increase in MDA content. Meanwhile, an obvious transcriptional inhibition in psbA gene of photosystem II (PSII) system after PEG exposure was also determined by reverse transcriptional semiquantitative polymerase chain amplification assay. The exogenous ABA treatment could significantly alleviate the stress injury.Moreover, compared to Yumai 949, Shaanmai 5 had less destroyed plasma membranes, less reduces in RWC, chlorophyll contents, yield and psbA transcriptional level, and all parameters could be restored to the levels of control by exogenous ABA treatment, suggesting a correlationship between cultivar dependent drought stress resistance and psbA gene expression. The present results firstly provide some evidences to the important regulatory function of exogenous ABA on psbA expression, and proposed that the application of exogenous ABA could enhance the stress resistance of wheat plant at grain filling stage by protecting important gene transcription in PSII system.
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Claims 11
Claim · model-written summary
PEG drought stress decreased relative water contents, chlorophyll contents and yield of wheat.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- PEGe1
- Outcome
- relative water contents (RWC), chlorophyll contents, and yielde2
- Direction
- decreasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e1“Two wheat cultivars, Yumai 949 and Shaanmai 5 in grain filling stage were drought stressed by PEG for 72 h”
e2“The results showed a marked decrease in relative water contents (RWC), chlorophyll contents, and yield, along with a significant increase in MDA content”
Claim · model-written summary
PEG drought stress increased MDA content in wheat significantly.
- Taxon
- wheatTriticum aestivume0
- Treatment
- PEGe1
- Outcome
- MDA contente2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e1“Two wheat cultivars, Yumai 949 and Shaanmai 5 in grain filling stage were drought stressed by PEG for 72 h”
e2“The results showed a marked decrease in relative water contents (RWC), chlorophyll contents, and yield, along with a significant increase in MDA content”
Claim · model-written summary
PEG exposure caused transcriptional inhibition of the psbA gene in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- PEG exposuree3
- Gene
- psbAe3
- Outcome
- transcriptional inhibitione3
- Direction
- inhibitione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e3“an obvious transcriptional inhibition in psbA gene of photosystem II (PSII) system after PEG exposure”
Claim · model-written summary
Exogenous ABA significantly alleviated drought stress injury in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous ABA treatmente4
- Outcome
- stress injurye4
- Direction
- alleviatee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e4“The exogenous ABA treatment could significantly alleviate the stress injury”
Claim · model-written summary
Exogenous ABA restored all measured parameters of wheat to control levels under drought.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous ABA treatmente5
- Outcome
- all parameterse5
- Direction
- restorede5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e5“all parameters could be restored to the levels of control by exogenous ABA treatment”
Claim · model-written summary
Shaanmai 5 had less destroyed plasma membranes than Yumai 949 under drought.
- Taxon
- wheatTriticum aestivume0
- Material
- Shaanmai 5e6
- Outcome
- destroyed plasma membranese6
- Direction
- lesse6
- Comparator
- Yumai 949e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e1“Two wheat cultivars, Yumai 949 and Shaanmai 5 in grain filling stage were drought stressed by PEG for 72 h”
e6“Shaanmai 5 had less destroyed plasma membranes, less reduces in RWC, chlorophyll contents, yield and psbA transcriptional level”
Claim · model-written summary
Shaanmai 5 showed smaller reductions in RWC, chlorophyll contents and yield than Yumai 949 under drought.
- Taxon
- wheatTriticum aestivume0
- Material
- Shaanmai 5e6
- Outcome
- reduces in RWC, chlorophyll contents, yielde6
- Direction
- lesse6
- Comparator
- Yumai 949e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e1“Two wheat cultivars, Yumai 949 and Shaanmai 5 in grain filling stage were drought stressed by PEG for 72 h”
e6“Shaanmai 5 had less destroyed plasma membranes, less reduces in RWC, chlorophyll contents, yield and psbA transcriptional level”
Claim · model-written summary
Shaanmai 5 showed a smaller reduction in psbA transcriptional level than Yumai 949 under drought.
- Taxon
- wheatTriticum aestivume0
- Material
- Shaanmai 5e6
- Gene
- psbAe6
- Outcome
- psbA transcriptional levele6
- Direction
- lesse6
- Comparator
- Yumai 949e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e1“Two wheat cultivars, Yumai 949 and Shaanmai 5 in grain filling stage were drought stressed by PEG for 72 h”
e6“Shaanmai 5 had less destroyed plasma membranes, less reduces in RWC, chlorophyll contents, yield and psbA transcriptional level”
Claim · model-written summary
Cultivar-dependent drought stress resistance of wheat is correlated with psbA gene expression.
- Taxon
- wheatTriticum aestivume0
- Gene
- psbAe7
- Outcome
- drought stress resistance and psbA gene expressione7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e7“suggesting a correlationship between cultivar dependent drought stress resistance and psbA gene expression”
Claim · model-written summary
Exogenous ABA may enhance wheat stress resistance at grain filling by protecting PSII gene transcription.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous ABAe6
- Outcome
- stress resistancee6
- Qualifier
- protecting important gene transcription in PSII systeme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e6“the application of exogenous ABA could enhance the stress resistance of wheat plant at grain filling stage by protecting important gene transcription in PSII system”
Claim · model-written summary
Exogenous ABA has a regulatory function on psbA expression in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous ABAe7
- Outcome
- psbA expressione7
- Qualifier
- regulatory functione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of exogenous ABA application on wheat plant (Triticum aestivum L.) under drought stress were investigated”
e7“The present results firstly provide some evidences to the important regulatory function of exogenous ABA on psbA expression”
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