Abstract
MYB transcription factors (TFs) mediate plant responses and defenses to biotic and abiotic stresses. The effects of overexpression of MYB37 , an R2R3 MYB subgroup 14 transcription factors in Arabidopsis thaliana, on chlorophyll content, chlorophyll fluorescence parameters, reactive oxygen species (ROS) metabolism, and the contents of osmotic regulatory substances were studied under 100 mM NaCl stress. Compared with the wild type (Col-0), MYB37 overexpression significantly alleviated the salt stress symptoms in A. thaliana plants. Chlorophyll a (Chl a ) and chlorophyll b (Chl b ) contents were significantly decreased in OE-1 and OE-2 than in Col-0. Particularly, the Chl a / b ratio was also higher in OE-1 and OE-2 than in Col-0 under NaCl stress. However, MYB37 overexpression alleviated the degradation of chlorophyll, especially Chl a . Salt stress inhibited the activities of PSII and PSI in Arabidopsis leaves, but did not affect the activity of PSII electron donor side oxygen-evolving complex (OEC). MYB37 overexpression increased photosynthesis in Arabidopsis by increasing PSII and PSI activities. MYB37 overexpression also promoted the transfer of electrons from Q A to Q B on the PSII receptor side of Arabidopsis under NaCl stress. Additionally, MYB37 overexpression increased Y(II) and Y(NPQ) of Arabidopsis under NaCl stress and decreased Y(NO). These results indicate that MYB37 overexpression increases PSII activity and regulates the proportion of energy dissipation in Arabidopsis leaves under NaCl stress, thus decreasing the proportion of inactivated reaction centers. Salt stress causes excess electrons and energy in the photosynthetic electron transport chain of Arabidopsis leaves, resulting in the release of reactive oxygen species (ROS), such as superoxide anion and hydrogen peroxide, leading to oxidative damage. Nevertheless, MYB37 overexpression reduced accumulation of malondialdehyde in Arabidopsis leaves under NaCl stress and alleviated the degree of membrane lipid peroxidation caused by ROS. Salt stress also enhanced the accumulation of soluble sugar (SS) and proline (Pro) in Arabidopsis leaves, thus reducing salt stress damage to plants. Salt stress also degraded soluble protein (SP). Furthermore, the accumulation of osmoregulation substances SS and Pro in OE-1 and OE-2 was not different from that in Col-0 since MYB37 overexpression in Arabidopsis OE-1, and OE-2 did not significantly affect plants under NaCl stress. However, SP content was significantly higher in OE-1 and OE-2 than in Col-0. These results indicate that MYB37 overexpression can alleviate the degradation of Arabidopsis proteins under NaCl stress, promote plant growth and improve salt tolerance.
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Claims 19
Claim · model-written summary
Compared with the wild type Col-0, MYB37 overexpression significantly alleviated the salt stress symptoms in A. thaliana.
- Taxon
- A. thaliana
Arabidopsis thalianae0 - Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- salt stress symptomse0
- Direction
- alleviatede0
- Comparator
- wild type (Col-0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the wild type (Col-0), MYB37 overexpression significantly alleviated the salt stress symptoms in A. thaliana plants”
Claim · model-written summary
Chlorophyll a and chlorophyll b contents were significantly lower in MYB37 overexpression lines OE-1 and OE-2 than in Col-0.
- Taxon
- ArabidopsisArabidopsist0
- Material
- OE-1 and OE-2e1
- Treatment
- overexpression of MYB37e0
- Outcome
- Chlorophyll a (Chl a ) and chlorophyll b (Chl b ) contentse1
- Direction
- decreasede1
- Comparator
- Col-0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e0“overexpression of MYB37”
e1“Chlorophyll a (Chl a ) and chlorophyll b (Chl b ) contents were significantly decreased in OE-1 and OE-2 than in Col-0”
Claim · model-written summary
The Chl a / b ratio was higher in OE-1 and OE-2 than in Col-0 under NaCl stress.
- Taxon
- ArabidopsisArabidopsist0
- Material
- OE-1 and OE-2e1
- Treatment
- overexpression of MYB37e0
- Outcome
- Chl a / b ratioe1
- Direction
- highere1
- Qualifier
- under NaCl stresse1
- Comparator
- Col-0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e0“overexpression of MYB37”
e1“the Chl a / b ratio was also higher in OE-1 and OE-2 than in Col-0 under NaCl stress”
Claim · model-written summary
MYB37 overexpression alleviated the degradation of chlorophyll, especially Chl a.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- degradation of chlorophylle0
- Direction
- alleviatede0
- Qualifier
- especially Chl ae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e0“MYB37 overexpression alleviated the degradation of chlorophyll, especially Chl a”
Claim · model-written summary
Salt stress inhibited the activities of PSII and PSI in Arabidopsis leaves.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- Salt stresse0
- Outcome
- activities of PSII and PSIe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress inhibited the activities of PSII and PSI in Arabidopsis leaves”
Claim · model-written summary
Salt stress did not affect the activity of the PSII electron donor side oxygen-evolving complex (OEC) in Arabidopsis leaves.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- Salt stresse0
- Outcome
- activity of PSII electron donor side oxygen-evolving complex (OEC)e0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress inhibited the activities of PSII and PSI in Arabidopsis leaves, but did not affect the activity of PSII electron donor side oxygen-evolving complex (OEC)”
Claim · model-written summary
MYB37 overexpression increased photosynthesis in Arabidopsis by increasing PSII and PSI activities.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- photosynthesise0
- Direction
- increasede0
- Qualifier
- by increasing PSII and PSI activitiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression increased photosynthesis in Arabidopsis by increasing PSII and PSI activities”
Claim · model-written summary
MYB37 overexpression promoted electron transfer from QA to QB on the PSII receptor side of Arabidopsis under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- transfer of electrons from Q A to Q Be0
- Direction
- promotede0
- Qualifier
- under NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression also promoted the transfer of electrons from Q A to Q B on the PSII receptor side of Arabidopsis under NaCl stress”
Claim · model-written summary
MYB37 overexpression increased Y(II) and Y(NPQ) of Arabidopsis under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- Y(II) and Y(NPQ)e0
- Direction
- increasede0
- Qualifier
- under NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression increased Y(II) and Y(NPQ) of Arabidopsis under NaCl stress and decreased Y(NO)”
Claim · model-written summary
MYB37 overexpression decreased Y(NO) of Arabidopsis under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- Y(NO)e0
- Direction
- decreasede0
- Qualifier
- under NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression increased Y(II) and Y(NPQ) of Arabidopsis under NaCl stress and decreased Y(NO)”
Claim · model-written summary
The authors conclude that MYB37 overexpression increases PSII activity in Arabidopsis leaves under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- PSII activitye0
- Direction
- increasese0
- Qualifier
- under NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression increases PSII activity and regulates the proportion of energy dissipation in Arabidopsis leaves under NaCl stress”
Claim · model-written summary
The authors conclude that MYB37 overexpression decreases the proportion of inactivated reaction centers in Arabidopsis leaves under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- proportion of inactivated reaction centerse0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression increases PSII activity and regulates the proportion of energy dissipation in Arabidopsis leaves under NaCl stress, thus decreasing the proportion of inactivated reaction centers”
Claim · model-written summary
MYB37 overexpression reduced accumulation of malondialdehyde in Arabidopsis leaves under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- accumulation of malondialdehydee0
- Direction
- reducede0
- Qualifier
- under NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression reduced accumulation of malondialdehyde in Arabidopsis leaves under NaCl stress”
Claim · model-written summary
MYB37 overexpression alleviated the degree of ROS-caused membrane lipid peroxidation in Arabidopsis leaves under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- membrane lipid peroxidatione0
- Direction
- alleviatede0
- Qualifier
- under NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression reduced accumulation of malondialdehyde in Arabidopsis leaves under NaCl stress and alleviated the degree of membrane lipid peroxidation caused by ROS”
Claim · model-written summary
Salt stress enhanced the accumulation of soluble sugar and proline in Arabidopsis leaves.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- Salt stresse0
- Outcome
- accumulation of soluble sugar (SS) and proline (Pro)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress also enhanced the accumulation of soluble sugar (SS) and proline (Pro) in Arabidopsis leaves”
Claim · model-written summary
Salt stress degraded soluble protein (SP) in Arabidopsis.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Salt stresse0
- Outcome
- soluble protein (SP)e0
- Direction
- degradede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e0“Salt stress also degraded soluble protein (SP)”
Claim · model-written summary
Accumulation of the osmoregulation substances SS and Pro in OE-1 and OE-2 did not differ from that in Col-0 under NaCl stress.
- Taxon
- ArabidopsisArabidopsist0
- Material
- OE-1 and OE-2e1
- Treatment
- overexpression of MYB37e0
- Outcome
- accumulation of osmoregulation substances SS and Proe1
- Direction
- not differente1
- Comparator
- Col-0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e0“overexpression of MYB37”
e1“the accumulation of osmoregulation substances SS and Pro in OE-1 and OE-2 was not different from that in Col-0”
Claim · model-written summary
SP content was significantly higher in OE-1 and OE-2 than in Col-0.
- Taxon
- ArabidopsisArabidopsist0
- Material
- OE-1 and OE-2e1
- Treatment
- overexpression of MYB37e0
- Outcome
- SP contente1
- Direction
- highere1
- Comparator
- Col-0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e0“overexpression of MYB37”
e1“SP content was significantly higher in OE-1 and OE-2 than in Col-0”
Claim · model-written summary
The authors conclude that MYB37 overexpression can promote plant growth and improve salt tolerance of Arabidopsis under NaCl stress.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- MYB37 overexpressione0
- Gene
- MYB37e0
- Outcome
- salt tolerancee0
- Direction
- improvee0
- Qualifier
- promote plant growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MYB37 overexpression can alleviate the degradation of Arabidopsis proteins under NaCl stress, promote plant growth and improve salt tolerance”
The same questions in other papers
salinity · physiology: photosynthesis · ArabidopsisPositive and negative results
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