Abstract
Abstract Salt is a major abiotic factor significantly affecting plant growth and development. Alfalfa ( Medicago sativa L.), a crucial perennial crop for livestock feed, shows significant differences in salt tolerance among different varieties. This study aimed to comprehensively evaluate the salt tolerance of 30 varieties of alfalfa under salt stress (0, 150, and 300 mmol L −1 NaCl). It showed that shoot height (SH), root length (RL), shoot fresh weight (SFW), and root fresh weight (RFW) were decreased by 37.68%, 35.83%, 43.79% and 48.86%, respectively, under high salt stress. Photosynthesis‐related parameters, including chlorophyll a (Chl a ), chlorophyll b (Chl b ), total chlorophyll (TChl), and carotenoids (Car) contents of all varieties were decreased by 50.13%, 43.73%, 48.17% and 60.86%, respectively, and minimum inhibition of photosynthetic pigment contents was observed in the variety Salsa. The changes of antioxidant enzymes in different alfalfa varieties were also found under salt stress. For example, the APX of Sardi 7 decreased by 641.84%, while the APX of Phabulous decreased by 88.33% compared to the non‐treated controls. Principal component analysis (PCA) identified five major variables: Car, TChl, APX, Chl a , and POD. Finally, each variety's comprehensive tolerance membership function values were calculated by the membership function method, and the 30 varieties were classified into four categories by cluster analysis. Our findings indicate that Sardi 7, Salsa, Gannong No.8, Daye, and Instinct are alfalfa salt‐tolerant varieties. Our study provided baseline information on the response of alfalfa varieties to different salinity levels, which will help select or breed salt‐tolerant varieties.
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Claims 15
Claim · model-written summary
Under high salt stress, shoot height of alfalfa decreased by 37.68%
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- high salt stresse1
- Outcome
- shoot heighte1
- Direction
- decreasede1
- Value
- 37.68%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e1“shoot height (SH), root length (RL), shoot fresh weight (SFW), and root fresh weight (RFW) were decreased by 37.68%, 35.83%, 43.79% and 48.86%, respectively, under high salt stress”
Claim · model-written summary
Under high salt stress, root length of alfalfa decreased by 35.83%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- high salt stresse1
- Outcome
- root lengthe1
- Direction
- decreasede1
- Value
- 35.83%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e1“shoot height (SH), root length (RL), shoot fresh weight (SFW), and root fresh weight (RFW) were decreased by 37.68%, 35.83%, 43.79% and 48.86%, respectively, under high salt stress”
Claim · model-written summary
Under high salt stress, shoot fresh weight of alfalfa decreased by 43.79%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- high salt stresse1
- Outcome
- shoot fresh weighte1
- Direction
- decreasede1
- Value
- 43.79%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e1“shoot height (SH), root length (RL), shoot fresh weight (SFW), and root fresh weight (RFW) were decreased by 37.68%, 35.83%, 43.79% and 48.86%, respectively, under high salt stress”
Claim · model-written summary
Under high salt stress, root fresh weight of alfalfa decreased by 48.86%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- high salt stresse1
- Outcome
- root fresh weighte1
- Direction
- decreasede1
- Value
- 48.86%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e1“shoot height (SH), root length (RL), shoot fresh weight (SFW), and root fresh weight (RFW) were decreased by 37.68%, 35.83%, 43.79% and 48.86%, respectively, under high salt stress”
Claim · model-written summary
Under salt stress, chlorophyll a content of all alfalfa varieties decreased by 50.13%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salt stresst0
- Outcome
- chlorophyll ae2
- Direction
- decreasede2
- Value
- 50.13%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e2“chlorophyll a (Chl a ), chlorophyll b (Chl b ), total chlorophyll (TChl), and carotenoids (Car) contents of all varieties were decreased by 50.13%, 43.73%, 48.17% and 60.86%, respectively”
Claim · model-written summary
Under salt stress, chlorophyll b content of all alfalfa varieties decreased by 43.73%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salt stresst0
- Outcome
- chlorophyll be2
- Direction
- decreasede2
- Value
- 43.73%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e2“chlorophyll a (Chl a ), chlorophyll b (Chl b ), total chlorophyll (TChl), and carotenoids (Car) contents of all varieties were decreased by 50.13%, 43.73%, 48.17% and 60.86%, respectively”
Claim · model-written summary
Under salt stress, total chlorophyll content of all alfalfa varieties decreased by 48.17%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salt stresst0
- Outcome
- total chlorophylle2
- Direction
- decreasede2
- Value
- 48.17%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e2“chlorophyll a (Chl a ), chlorophyll b (Chl b ), total chlorophyll (TChl), and carotenoids (Car) contents of all varieties were decreased by 50.13%, 43.73%, 48.17% and 60.86%, respectively”
Claim · model-written summary
Under salt stress, carotenoid content of all alfalfa varieties decreased by 60.86%
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salt stresst0
- Outcome
- carotenoidse2
- Direction
- decreasede2
- Value
- 60.86%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e2“chlorophyll a (Chl a ), chlorophyll b (Chl b ), total chlorophyll (TChl), and carotenoids (Car) contents of all varieties were decreased by 50.13%, 43.73%, 48.17% and 60.86%, respectively”
Claim · model-written summary
Variety Salsa showed the minimum inhibition of photosynthetic pigment contents under salt stress
- Taxon
- alfalfaMedicago sativat0
- Material
- Salsae3
- Outcome
- photosynthetic pigment contentse3
- Qualifier
- minimum inhibitione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e3“minimum inhibition of photosynthetic pigment contents was observed in the variety Salsa”
Claim · model-written summary
Under salt stress, APX of Sardi 7 decreased by 641.84% compared with non-treated controls
- Taxon
- alfalfaMedicago sativat0
- Material
- Sardi 7e4
- Treatment
- salt stresst0
- Gene
- APXe4
- Outcome
- APXe4
- Direction
- decreasede4
- Value
- 641.84%e4
- Comparator
- non‐treated controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e4“the APX of Sardi 7 decreased by 641.84%, while the APX of Phabulous decreased by 88.33% compared to the non‐treated controls”
Claim · model-written summary
Under salt stress, APX of Phabulous decreased by 88.33% compared with non-treated controls
- Taxon
- alfalfaMedicago sativat0
- Material
- Phabulouse4
- Treatment
- salt stresst0
- Gene
- APXe4
- Outcome
- APXe4
- Direction
- decreasede4
- Value
- 88.33%e4
- Comparator
- non‐treated controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e4“the APX of Sardi 7 decreased by 641.84%, while the APX of Phabulous decreased by 88.33% compared to the non‐treated controls”
Claim · model-written summary
Principal component analysis identified five major variables (Car, TChl, APX, Chl a and POD) for alfalfa salt tolerance
- Taxon
- alfalfaMedicago sativat0
- Outcome
- major variablese5
- Value
- fivee5
- Qualifier
- Car, TChl, APX, Chl a , and PODe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e5“Principal component analysis (PCA) identified five major variables: Car, TChl, APX, Chl a , and POD”
Claim · model-written summary
Thirty alfalfa varieties were classified into four tolerance categories by cluster analysis
- Taxon
- alfalfaMedicago sativat0
- Outcome
- classifiede6
- Value
- four categoriese6
- Qualifier
- by cluster analysise6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa ( Medicago sativa L.) varieties under salt stress”
e6“the 30 varieties were classified into four categories by cluster analysis”
Claim · model-written summary
Sardi 7, Salsa and Gannong No.8 are alfalfa salt-tolerant varieties
- Taxon
- alfalfaMedicago sativae7
- Material
- Sardi 7, Salsa, Gannong No.8e7
- Outcome
- tolerant varietiese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Our findings indicate that Sardi 7, Salsa, Gannong No.8, Daye, and Instinct are alfalfa salt‐tolerant varieties”
Claim · model-written summary
Daye and Instinct are alfalfa salt-tolerant varieties
- Taxon
- alfalfaMedicago sativae7
- Material
- Daye, and Instincte7
- Outcome
- tolerant varietiese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Our findings indicate that Sardi 7, Salsa, Gannong No.8, Daye, and Instinct are alfalfa salt‐tolerant varieties”
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