Abstract
Castor bean (Ricinus communis L.) is widely cultivated throughout the world for use as a medicinal plant and oil consumption purposes; however its salt tolerance has not been clarified. To investigate the effect of salt stress on its growth and on activity of antioxidative enzymes in different organs, castor bean plants at the 4-leaf stage were subjected to 50, 100 and 200 mM NaCl admixed to Hoagland's solution for 10 days under greenhouse conditions. The results showed that salt stress inhibited plant growth (root and shoot length, fresh root and shot weight) but root growth was more affected then shoot. Relative water content of leaves and the membrane stability of the leaves were decreased with increasing NaCl concentration. The activity of guaiacol peroxidase (GPX) and catalase (CAT) was sharply decreased by escalation of salt stress. However activity of ascorbate peroxidase (APX) was enhanced under moderate salt stress (100 mM NaCl) in both root and shoot but then decreased with increased NaCl concentration. The activity of superoxide dismutase (SOD) increased with the increase of the concentration of NaCl in shoots and root. However alternation in enzymatic antioxidant activity was noticed in shoot compared to root. Increased H 2 O 2 , total soluble protein, proline content and malondialdehyde (MDA) concentration in both plant's organs was linearly and positively correlated with increasing NaCl concentration. The results of this study suggest that the salt sensitivity of Castor bean plant under salt stress conditions is probably due to a lack of efficient activity of CAT and GPX probably lead to imperfect H 2 O 2 scavenging.
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Claims 10
Claim · model-written summary
NaCl stress inhibited castor bean root and shoot growth, with roots more affected.
- Taxon
- castor bean
Ricinus communist0 - Organ / stage
- root and shoote0
- Treatment
- salt stresse0
- Outcome
- plant growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress inhibited plant growth (root and shoot length, fresh root and shot weight) but root growth was more affected then shoot”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
Increasing NaCl decreased leaf relative water content and membrane stability.
- Taxon
- castor beanRicinus communist0
- Organ / stage
- leavese0
- Treatment
- NaCle0
- Outcome
- Relative water content of leaves and the membrane stability of the leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative water content of leaves and the membrane stability of the leaves were decreased with increasing NaCl concentration”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
Increasing salt stress sharply decreased GPX and CAT activity.
- Taxon
- castor beanRicinus communist0
- Treatment
- salt stresse0
- Gene
- guaiacol peroxidase (GPX) and catalase (CAT)e0
- Outcome
- activity of guaiacol peroxidase (GPX) and catalase (CAT)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of guaiacol peroxidase (GPX) and catalase (CAT) was sharply decreased by escalation of salt stress”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
Moderate salt stress enhanced APX activity in roots and shoots.
- Taxon
- castor beanRicinus communist0
- Organ / stage
- root and shoote0
- Treatment
- moderate salt stress (100 mM NaCl)e0
- Gene
- ascorbate peroxidase (APX)e0
- Outcome
- activity of ascorbate peroxidase (APX)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activity of ascorbate peroxidase (APX) was enhanced under moderate salt stress (100 mM NaCl) in both root and shoot”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
APX activity subsequently decreased as NaCl concentration increased.
- Taxon
- castor beanRicinus communist0
- Treatment
- increased NaCl concentratione0
- Gene
- ascorbate peroxidase (APX)e0
- Outcome
- activity of ascorbate peroxidase (APX)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activity of ascorbate peroxidase (APX) was enhanced under moderate salt stress (100 mM NaCl) in both root and shoot but then decreased with increased NaCl concentration”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
SOD activity increased with NaCl concentration in shoots and roots.
- Taxon
- castor beanRicinus communist0
- Organ / stage
- shoots and roote0
- Treatment
- NaCle0
- Gene
- superoxide dismutase (SOD)e0
- Outcome
- activity of superoxide dismutase (SOD)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of superoxide dismutase (SOD) increased with the increase of the concentration of NaCl in shoots and root”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
Antioxidant enzyme activity differed between shoots and roots.
- Taxon
- castor beanRicinus communist0
- Organ / stage
- shoote0
- Outcome
- enzymatic antioxidant activitye0
- Comparator
- roote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alternation in enzymatic antioxidant activity was noticed in shoot compared to root”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
H2O2, soluble protein and proline in both organs rose with NaCl concentration.
- Taxon
- castor beanRicinus communist0
- Treatment
- NaCle0
- Outcome
- H 2 O 2 , total soluble protein, proline contente0
- Direction
- Increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased H 2 O 2 , total soluble protein, proline content and malondialdehyde (MDA) concentration in both plant's organs was linearly and positively correlated with increasing NaCl concentration”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
MDA concentration in both organs rose with NaCl concentration.
- Taxon
- castor beanRicinus communist0
- Treatment
- NaCle0
- Outcome
- malondialdehyde (MDA) concentratione0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“malondialdehyde (MDA) concentration in both plant's organs was linearly and positively correlated with increasing NaCl concentration”
t0“castor bean (Ricinus communis L.)”
Claim · model-written summary
The authors suggest castor bean salt sensitivity may reflect weak CAT and GPX activity and imperfect H2O2 scavenging.
- Taxon
- Castor beanRicinus communise0
- Gene
- CAT and GPXe0
- Outcome
- salt sensitivitye0
- Qualifier
- imperfect H 2 O 2 scavenginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt sensitivity of Castor bean plant under salt stress conditions is probably due to a lack of efficient activity of CAT and GPX probably lead to imperfect H 2 O 2 scavenging”
The same questions in other papers
sodium chloride · physiology: water · Ricinus communis (castor bean)Results agree
1 paper in the same direction as this paper
- negative
sodium chloride · physiology: antioxidant enzymes · Ricinus communis (castor bean)Results agree
1 paper in the same direction as this paper
- positive
salinity · physiology: antioxidant enzymes · Ricinus communis (castor bean)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
salinity · growth · Ricinus communis (castor bean)Positive and negative results
12 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- positive
12 papers more in this group
See all 16 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.