Abstract
The seed germination,seedling growth and physiological and biochemical indexes of stress resistance of Medicago sativa were discussed in this paper as the different treatments(CK,10% PEG,0.03% FA+10% PEG and 0.05% FA+10% PEG)were carried out in the experiments.The results showed that:(1)M.sativaseed germination rate,germinating energy,germination index,vigor index and seedling chlorophyll content,membrane stability indexcatalase(MSI)and root activity were downward trend.The growth rate of stem length and biomass were decreased,but the contents of malondialdehyde(MDA),hydrogen peroxide(H2 O2),proline and soluble sugar of seedling leaves increased with the increasing of treatment duration.The activities of catalase(CAT)and glutathione reductase(GR)decreased firstly and secondly increased and finally decreased.The activities of superoxide dismutase(SOD)and peroxidase(POD)and superoxide anion(O-· 2)increased firstly and then decreased under the simulated drought stress.The growth and development of M.sativa were inhibited significantly under the simulated drought stress and the seedling suffered from drought stress.(2)As being treated with the fulvic acid,the M.sativaseed germination rate,germinating energy,germination index,vigor index,and seedling'stem length,biomass,proline and soluble sugar contents were increased significantly.The treatment of fulvic acid also significantly alleviated the decline in the content of chlorophyll,root activity and MSI,promoted the activities of SOD POD,CAT and GR relatively,and even reduced the contents of MDA,H2 O2 and the level of reactive oxygen species.It is thus clear that the seed germination and seedling growth and development of M.sativa were significantly inhibited under 10% PEG solution simulated drought stress.In soaking seeds with fulvic acid,the content of osmotic adjustment substances was increased and enzyme activities were protected to effectively reduce oxidative damages caused by drought stress to the seedling of M.sativa,enhanced overall drought resistance of plants and maintained their normal growth.Besides,relatively significant effects were achieved by 0.05% FA in maintaining the seed germination and seedling growth of M.sativa under drought stress.
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Claims 14
Claim · model-written summary
Under simulated drought, germination rate, energy, index and vigor index declined with treatment duration.
- Taxon
- Medicago sativa
Medicago sativat0 - Treatment
- simulated drought stresse1
- Outcome
- seed germination rate,germinating energy,germination index,vigor indexe0
- Direction
- downward trende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M.sativaseed germination rate,germinating energy,germination index,vigor index and seedling chlorophyll content,membrane stability indexcatalase(MSI)and root activity were downward trend.”
e1“and then decreased under the simulated drought stress”
t0“Medicago sativa”
Claim · model-written summary
Seedling chlorophyll content, membrane stability index and root activity declined under drought.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- simulated drought stresse1
- Outcome
- seedling chlorophyll content,membrane stability indexcatalase(MSI)and root activitye0
- Direction
- downward trende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling chlorophyll content,membrane stability indexcatalase(MSI)and root activity were downward trend”
e1“and then decreased under the simulated drought stress”
t0“Medicago sativa”
Claim · model-written summary
Stem elongation and biomass growth declined under drought.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- simulated drought stresse1
- Outcome
- growth rate of stem length and biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth rate of stem length and biomass were decreased”
e1“and then decreased under the simulated drought stress”
t0“Medicago sativa”
Claim · model-written summary
Leaf MDA, hydrogen peroxide and proline rose as drought treatment continued.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- increasing of treatment duratione0
- Outcome
- malondialdehyde(MDA),hydrogen peroxide(H2 O2),prolinee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of malondialdehyde(MDA),hydrogen peroxide(H2 O2),proline and soluble sugar of seedling leaves increased with the increasing of treatment duration”
t0“Medicago sativa”
Claim · model-written summary
Leaf soluble sugar increased with drought treatment duration.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- increasing of treatment duratione0
- Outcome
- soluble sugar of seedling leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soluble sugar of seedling leaves increased with the increasing of treatment duration”
t0“Medicago sativa”
Claim · model-written summary
CAT and GR activities fell, then rose, then fell under simulated drought.
- Taxon
- Medicago sativaMedicago sativat0
- Outcome
- activities of catalase(CAT)and glutathione reductase(GR)e0
- Direction
- decreased firstly and secondly increased and finally decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of catalase(CAT)and glutathione reductase(GR)decreased firstly and secondly increased and finally decreased”
t0“Medicago sativa”
Claim · model-written summary
SOD, POD and superoxide anion rose then fell under simulated drought.
- Taxon
- Medicago sativaMedicago sativat0
- Outcome
- superoxide dismutase(SOD)and peroxidase(POD)and superoxide anion(O-· 2)e0
- Direction
- increased firstly and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of superoxide dismutase(SOD)and peroxidase(POD)and superoxide anion(O-· 2)increased firstly and then decreased under the simulated drought stress”
t0“Medicago sativa”
Claim · model-written summary
Fulvic acid significantly increased seed germination measures.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- fulvic acide0
- Outcome
- seed germination rate,germinating energy,germination index,vigor indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As being treated with the fulvic acid,the M.sativaseed germination rate,germinating energy,germination index,vigor index,and seedling'stem length,biomass,proline and soluble sugar contents were increased significantly.”
t0“Medicago sativa”
Claim · model-written summary
Fulvic acid significantly increased seedling stem length and biomass.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- fulvic acide1
- Outcome
- seedling'stem length,biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling'stem length,biomass,proline and soluble sugar contents were increased significantly”
e1“treated with the fulvic acid”
t0“Medicago sativa”
Claim · model-written summary
Fulvic acid significantly increased seedling proline and soluble sugar contents.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- fulvic acide1
- Outcome
- proline and soluble sugar contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline and soluble sugar contents were increased significantly”
e1“treated with the fulvic acid”
t0“Medicago sativa”
Claim · model-written summary
Fulvic acid significantly alleviated loss of chlorophyll content, root activity and MSI.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- fulvic acide0
- Outcome
- content of chlorophyll,root activity and MSIe0
- Direction
- alleviated the declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment of fulvic acid also significantly alleviated the decline in the content of chlorophyll,root activity and MSI”
t0“Medicago sativa”
Claim · model-written summary
Fulvic acid promoted SOD, POD, CAT and GR activity.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- fulvic acide1
- Outcome
- activities of SOD POD,CAT and GRe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoted the activities of SOD POD,CAT and GR relatively”
e1“The treatment of fulvic acid”
t0“Medicago sativa”
Claim · model-written summary
Fulvic acid reduced MDA, hydrogen peroxide and reactive oxygen species.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- fulvic acide1
- Outcome
- contents of MDA,H2 O2 and the level of reactive oxygen speciese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced the contents of MDA,H2 O2 and the level of reactive oxygen species”
e1“The treatment of fulvic acid”
t0“Medicago sativa”
Claim · model-written summary
The 0.05% FA treatment was relatively effective at maintaining germination and seedling growth under drought.
- Taxon
- M.sativaMedicago sativae0
- Treatment
- 0.05% FAe0
- Outcome
- seed germination and seedling growthe0
- Direction
- maintaininge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relatively significant effects were achieved by 0.05% FA in maintaining the seed germination and seedling growth of M.sativa under drought stress”
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