Abstract
Salinity stress is a brutal environmental stress which decreases the yield production of plants. Questions rise on which of the ionic stress or lack of water has deleterious effects on plants forage dry yield. Also, questions remain on whether the K+ reduction or Na+ accumulation is more important in forage dry yield reduction under salinity stress. The present experiment was conducted to answer the above questions in four alfalfa ecotypes. To do so, 6-7 weeks seedlings were irrigated with high salty water (EC=20dS m-1) and RWC, MSI, height, forage dry yield, Na+ and K+ were measured 1, 3, 6, 10, and 16 days after the salt shock. The results showed that one day after irrigation with saline water, all measured traits changed adversely. Salinity stress by decreasing K+ and increasing Na+ content reduced the growth of alfalfa plants. RWC reduction was less than K+ reduction or Na+ accumulation, so ionic stress had more deleterious effects on forage dry yield of alfalfa plants. Root cells had a higher content of K+ and Na+ ions compared with leaves, hence, they had a major defensive role against salinity stress. The K+/Na+ ratio reduction in saline condition was the main element for decreasing plant forage dry yield. The application of high salty water for irrigation of alfalfa plants is possible if there is a good subsoil drainage system to remove the leached saline water regularly from the soil. It is also suggested that foliar application of potassium may be ameliorate harmful effects of salinity stress in plant growth.
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Claims 12
Claim · model-written summary
All measured alfalfa traits changed adversely one day after saline irrigation.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- irrigation with saline watere0
- Outcome
- all measured traitse0
- Direction
- adverselye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one day after irrigation with saline water, all measured traits changed adversely”
t0“in Alfalfa ecotypes”
Claim · model-written summary
Salinity reduced alfalfa K+ content.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Salinity stresse0
- Outcome
- K+e0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress by decreasing K+ and increasing Na+ content reduced the growth of alfalfa plants.”
Claim · model-written summary
Salinity increased alfalfa Na+ content.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Salinity stresse0
- Outcome
- Na+ contente0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress by decreasing K+ and increasing Na+ content reduced the growth of alfalfa plants.”
Claim · model-written summary
Salinity reduced alfalfa growth.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Salinity stresse0
- Outcome
- growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress by decreasing K+ and increasing Na+ content reduced the growth of alfalfa plants.”
Claim · model-written summary
RWC fell less than K+ under salinity.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- RWC reductione0
- Direction
- lesse0
- Comparator
- K+ reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RWC reduction was less than K+ reduction or Na+ accumulation”
t0“in Alfalfa ecotypes”
Claim · model-written summary
Ionic stress harmed alfalfa forage dry yield more than water deficit.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- forage dry yielde0
- Direction
- more deleteriouse0
- Qualifier
- ionic stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ionic stress had more deleterious effects on forage dry yield of alfalfa plants”
Claim · model-written summary
Root cells had higher K+ content than leaves.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- Root cellse0
- Outcome
- content of K+e0
- Direction
- highere0
- Comparator
- leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root cells had a higher content of K+ and Na+ ions compared with leaves”
t0“in Alfalfa ecotypes”
Claim · model-written summary
Root cells had higher Na+ content than leaves.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- Root cellse0
- Outcome
- Na+ ionse0
- Direction
- highere0
- Comparator
- leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root cells had a higher content of K+ and Na+ ions compared with leaves”
t0“in Alfalfa ecotypes”
Claim · model-written summary
Root cells were interpreted as having a major defensive role against salinity.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- Root cellse1
- Outcome
- major defensive role against salinity stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they had a major defensive role against salinity stress”
e1“Root cells”
t0“in Alfalfa ecotypes”
Claim · model-written summary
Reduced K+/Na+ ratio was identified as the main factor decreasing forage dry yield.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- plant forage dry yielde0
- Direction
- decreasinge0
- Qualifier
- K+/Na+ ratio reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K+/Na+ ratio reduction in saline condition was the main element for decreasing plant forage dry yield.”
t0“in Alfalfa ecotypes”
Claim · model-written summary
High-salt irrigation was considered possible with good subsoil drainage and regular salt-water removal.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- application of high salty water for irrigation of alfalfa plants is possiblee0
- Qualifier
- good subsoil drainage systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of high salty water for irrigation of alfalfa plants is possible if there is a good subsoil drainage system to remove the leached saline water regularly from the soil.”
Claim · model-written summary
Foliar potassium was suggested to ameliorate salinity effects on growth.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- foliar application of potassiume0
- Outcome
- foliar application of potassium may be ameliorate harmful effects of salinity stress in plant growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is also suggested that foliar application of potassium may be ameliorate harmful effects of salinity stress in plant growth.”
t0“in Alfalfa ecotypes”
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See all 95 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.