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 H2O2, 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 H2O2 scavenging.
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Claims 14
Claim · model-written summary
Salt stress inhibited root and shoot length and fresh weight, with roots more affected.
- Taxon
- castor bean
Ricinus communist0 - Treatment
- salt stresse0
- Outcome
- plant growth (root and shoot length, fresh root and shot weight)e0
- Direction
- inhibitede0
- Qualifier
- root growth was more affected then shoote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“salt stress inhibited plant growth (root and shoot length, fresh root and shot weight) but root growth was more affected then shoot.”
Claim · model-written summary
Increasing NaCl decreased leaf relative water content.
- Taxon
- castor beanRicinus communist0
- Organ / stage
- leavese0
- Treatment
- increasing NaCl concentratione0
- Outcome
- Relative water content of leavese0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“Relative water content of leaves and the membrane stability of the leaves were decreased with increasing NaCl concentration.”
Claim · model-written summary
Increasing NaCl decreased leaf membrane stability.
- Taxon
- castor beanRicinus communist0
- Treatment
- increasing NaCl concentratione0
- Outcome
- membrane stability of the leavese0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“Relative water content of leaves and the membrane stability of the leaves were decreased with increasing NaCl concentration.”
Claim · model-written summary
Escalating salt stress sharply decreased GPX activity.
- Taxon
- castor beanRicinus communist0
- Treatment
- escalation of salt stresse0
- Gene
- guaiacol peroxidase (GPX)e0
- Outcome
- activity of guaiacol peroxidase (GPX)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“The activity of guaiacol peroxidase (GPX) and catalase (CAT) was sharply decreased by escalation of salt stress.”
Claim · model-written summary
Escalating salt stress sharply decreased CAT activity.
- Taxon
- castor beanRicinus communist0
- Treatment
- escalation of salt stresse0
- Gene
- catalase (CAT)e0
- Outcome
- catalase (CAT)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“The activity of guaiacol peroxidase (GPX) and catalase (CAT) was sharply decreased by escalation of salt stress.”
Claim · model-written summary
At 100 mM NaCl, APX activity increased 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
t0“castor bean (Ricinus communis L.)”
e0“activity of ascorbate peroxidase (APX) was enhanced under moderate salt stress (100 mM NaCl) in both root and shoot”
Claim · model-written summary
APX activity decreased at higher NaCl concentration.
- Taxon
- castor beanRicinus communist0
- Treatment
- increased NaCl concentratione0
- Outcome
- decreasede0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“but then decreased with increased NaCl concentration.”
Claim · model-written summary
SOD activity increased with NaCl concentration in shoots and roots.
- Taxon
- castor beanRicinus communist0
- Organ / stage
- shoots and roote0
- Treatment
- concentration of 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
t0“castor bean (Ricinus communis L.)”
e0“The activity of superoxide dismutase (SOD) increased with the increase of the concentration of NaCl in shoots and root.”
Claim · model-written summary
Antioxidant enzyme activity differed between shoot and root.
- 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
t0“castor bean (Ricinus communis L.)”
e0“alternation in enzymatic antioxidant activity was noticed in shoot compared to root.”
Claim · model-written summary
H2O2 increased linearly with increasing NaCl in both organs.
- Taxon
- castor beanRicinus communist0
- Treatment
- increasing NaCl concentratione0
- Outcome
- H2O2e0
- Direction
- Increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“Increased H2O2, total soluble protein, proline content and malondialdehyde (MDA) concentration in both plant’s organs was linearly and positively correlated with increasing NaCl concentration.”
Claim · model-written summary
Total soluble protein increased linearly with NaCl concentration.
- Taxon
- castor beanRicinus communist0
- Treatment
- increasing NaCl concentratione0
- Outcome
- total soluble proteine0
- Direction
- Increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“Increased H2O2, total soluble protein, proline content and malondialdehyde (MDA) concentration in both plant’s organs was linearly and positively correlated with increasing NaCl concentration.”
Claim · model-written summary
Proline content increased linearly with NaCl concentration.
- Taxon
- castor beanRicinus communist0
- Treatment
- increasing NaCl concentratione0
- Outcome
- proline contente0
- Direction
- Increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“Increased H2O2, total soluble protein, proline content and malondialdehyde (MDA) concentration in both plant’s organs was linearly and positively correlated with increasing NaCl concentration.”
Claim · model-written summary
MDA concentration increased linearly with NaCl concentration.
- Taxon
- castor beanRicinus communist0
- Treatment
- increasing NaCl concentratione0
- Outcome
- malondialdehyde (MDA) concentratione0
- Direction
- Increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
e0“Increased H2O2, total soluble protein, proline content and malondialdehyde (MDA) concentration in both plant’s organs was linearly and positively correlated with increasing NaCl concentration.”
Claim · model-written summary
Authors suggest salt sensitivity stems from weak CAT and GPX activity and imperfect H2O2 scavenging.
- Taxon
- Castor beanRicinus communise0
- Gene
- CAT and GPXe0
- Outcome
- salt sensitivitye0
- Qualifier
- imperfect H2O2 scavenginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“castor bean (Ricinus communis L.)”
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 H2O2 scavenging.”
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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.