Abstract
Drought is one of major environmental determinants of plant growth and productivity. Alfalfa (Medicago sativa) is a legume perennial forage crop native to the arid and semi-arid environment, which is an ideal candidate to study the biochemical and molecular mechanisms conferring drought resistance in plants. In this study, drought stress responses of two alfalfa varieties, Longdong and Algonquin, were comparatively assayed at the physiological, morphological, and transcriptional levels. Under control condition, the drought-tolerant Longdong with smaller leaf size and lower stomata density showed less water loss than the drought-sensitive Algonquin. After exposing to drought stress, Longdong showed less severe cell membrane damage, more proline, and ascorbate (ASC) contents and less accumulation of H2O2 than Algonquin. Moreover, significantly higher antioxidant enzymes activities after drought treatment were found in Longdong when compared with Algonquin. In addition, transcriptional expression analysis showed that Longdong exhibited significantly higher transcripts of drought-responsive genes in leaf and root under drought stress condition. Taken together, these results indicated that Longdong variety was more drought-tolerant than Algonquin variety as evidenced by less leaf firing, more lateral root number, higher relative aboveground/underground biomass per plant and survival rate.
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Claims 13
Claim · model-written summary
Under control conditions, Longdong showed less water loss than Algonquin.
- Taxon
- Medicago sativa
Medicago sativae1 - Material
- Longdonge2
- Outcome
- water losse2
- Direction
- lesse2
- Comparator
- Algonquine2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Under control condition, the drought-tolerant Longdong with smaller leaf size and lower stomata density showed less water loss than the drought-sensitive Algonquin”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
After drought stress, Longdong showed less severe cell membrane damage than Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge3
- Treatment
- drought stresse3
- Outcome
- cell membrane damagee3
- Direction
- less severee3
- Comparator
- Algonquine3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“After exposing to drought stress, Longdong showed less severe cell membrane damage, more proline, and ascorbate (ASC) contents and less accumulation of H2O2 than Algonquin”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
After drought stress, Longdong showed more proline than Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge3
- Treatment
- drought stresse3
- Outcome
- prolinee3
- Direction
- moree3
- Comparator
- Algonquine3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“After exposing to drought stress, Longdong showed less severe cell membrane damage, more proline, and ascorbate (ASC) contents and less accumulation of H2O2 than Algonquin”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
After drought stress, Longdong showed more ascorbate (ASC) contents than Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge3
- Treatment
- drought stresse3
- Outcome
- ascorbate (ASC) contentse3
- Direction
- moree3
- Comparator
- Algonquine3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“After exposing to drought stress, Longdong showed less severe cell membrane damage, more proline, and ascorbate (ASC) contents and less accumulation of H2O2 than Algonquin”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
After drought stress, Longdong showed less H2O2 accumulation than Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge3
- Treatment
- drought stresse3
- Outcome
- accumulation of H2O2e3
- Direction
- lesse3
- Comparator
- Algonquine3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“After exposing to drought stress, Longdong showed less severe cell membrane damage, more proline, and ascorbate (ASC) contents and less accumulation of H2O2 than Algonquin”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
After drought treatment, antioxidant enzyme activities were significantly higher in Longdong than in Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge4
- Treatment
- drought treatmente4
- Outcome
- antioxidant enzymes activitiese4
- Direction
- highere4
- Comparator
- Algonquine4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“significantly higher antioxidant enzymes activities after drought treatment were found in Longdong when compared with Algonquin”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong showed significantly higher transcripts of drought-responsive genes in leaf and root under drought stress.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge5
- Organ / stage
- leaf and roote5
- Treatment
- drought stress conditione5
- Gene
- drought-responsive genese5
- Outcome
- transcriptse5
- Direction
- highere5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“transcriptional expression analysis showed that Longdong exhibited significantly higher transcripts of drought-responsive genes in leaf and root under drought stress condition”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong was more drought-tolerant than Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdong varietye6
- Outcome
- drought-tolerante6
- Direction
- moree6
- Comparator
- Algonquin varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Longdong variety was more drought-tolerant than Algonquin variety as evidenced by less leaf firing, more lateral root number, higher relative aboveground/underground biomass per plant and survival rate”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong showed less leaf firing than Algonquin under drought.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdong varietye6
- Outcome
- leaf firinge6
- Direction
- lesse6
- Comparator
- Algonquin varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Longdong variety was more drought-tolerant than Algonquin variety as evidenced by less leaf firing, more lateral root number, higher relative aboveground/underground biomass per plant and survival rate”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong showed more lateral root number than Algonquin under drought.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdong varietye6
- Outcome
- lateral root numbere6
- Direction
- moree6
- Comparator
- Algonquin varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Longdong variety was more drought-tolerant than Algonquin variety as evidenced by less leaf firing, more lateral root number, higher relative aboveground/underground biomass per plant and survival rate”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong showed higher relative aboveground/underground biomass per plant than Algonquin under drought.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdong varietye6
- Outcome
- relative aboveground/underground biomass per plante6
- Direction
- highere6
- Comparator
- Algonquin varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Longdong variety was more drought-tolerant than Algonquin variety as evidenced by less leaf firing, more lateral root number, higher relative aboveground/underground biomass per plant and survival rate”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong showed higher survival rate than Algonquin under drought.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdong varietye6
- Outcome
- survival ratee6
- Direction
- highere6
- Comparator
- Algonquin varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Longdong variety was more drought-tolerant than Algonquin variety as evidenced by less leaf firing, more lateral root number, higher relative aboveground/underground biomass per plant and survival rate”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
Claim · model-written summary
Longdong has lower stomata density than Algonquin.
- Taxon
- Medicago sativaMedicago sativae1
- Material
- Longdonge7
- Outcome
- stomata densitye7
- Direction
- lowere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the drought-tolerant Longdong with smaller leaf size and lower stomata density”
e1“Alfalfa (Medicago sativa) is a legume perennial forage crop”
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