Abstract
Abstract Ricinus communis is an important oilseed crop worldwide and is also considered one of the best potential plants for salt‐affected soil improvement in northeast China. However, little is known about photosynthesis and carbohydrate metabolism in this plant, nor the distribution of carbohydrates in cotyledons and roots under salinity stress. In the present study, seedling growth, gas exchange parameters ( P N , E , g s and C i ), carbohydrate (fructose, sucrose, glucose, soluble sugar and starch) metabolism and related enzymes and genes were measured in Ricinus plants. Under salt stress, P N of cotyledons decreased significantly ( P < 0.05), resulting in weak photosynthetic capacity. Furthermore, salt stress increased sucrose and glucose content in cotyledons, but decreased soluble sugar and starch content. However, sucrose increased and starch decreased in roots. This may be correlated with the increasing sugar metabolism under salinity, including notable changes in sugar‐related enzyme activities (SPS, SuSy, α‐amylase and β‐amylase) and gene expression of RcINV , RcSUS , RcAmY , RcBAM and RcGBE1 . The results suggest that salinity reduces photosynthesis of cotyledons, alters carbohydrate allocation between cotyledons and roots and also promotes starch utilization in cotyledons and starch biosynthesis in roots, leading to a functional imbalance between cotyledons and roots. Together, these findings provide insights into the crucial role of sugar metabolism in improving salt‐tolerance of Ricinus during the early seedling growth stage.
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Claims 8
Claim · model-written summary
Under salt stress, photosynthesis (P N) of cotyledons decreased significantly.
- Taxon
- Ricinus communis
Ricinus communise5 - Organ / stage
- cotyledonse0
- Treatment
- salt stresse0
- Outcome
- P Ne0
- Direction
- decreasede0
- Qualifier
- P < 0.05e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, P N of cotyledons decreased significantly ( P < 0.05)”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Under salt stress, sucrose and glucose content increased in cotyledons.
- Taxon
- Ricinus communisRicinus communise5
- Organ / stage
- cotyledonse1
- Treatment
- salt stresse1
- Outcome
- sucrose and glucose contente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“salt stress increased sucrose and glucose content in cotyledons, but decreased soluble sugar and starch content”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Under salt stress, soluble sugar and starch content decreased in cotyledons.
- Taxon
- Ricinus communisRicinus communise5
- Organ / stage
- cotyledonse1
- Treatment
- salt stresse1
- Outcome
- soluble sugar and starch contente1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“salt stress increased sucrose and glucose content in cotyledons, but decreased soluble sugar and starch content”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Under salt stress, sucrose increased in roots.
- Taxon
- Ricinus communisRicinus communise5
- Organ / stage
- rootse2
- Treatment
- salt stresse0
- Outcome
- sucrosee2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“However, sucrose increased and starch decreased in roots”
e0“Under salt stress, P N of cotyledons decreased significantly ( P < 0.05)”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Under salt stress, starch decreased in roots.
- Taxon
- Ricinus communisRicinus communise5
- Organ / stage
- rootse2
- Treatment
- salt stresse0
- Outcome
- starche2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“However, sucrose increased and starch decreased in roots”
e0“Under salt stress, P N of cotyledons decreased significantly ( P < 0.05)”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Salt stress led to notable changes in sugar-metabolism enzyme activities in Ricinus.
- Taxon
- Ricinus communisRicinus communise5
- Treatment
- salt stresse0
- Outcome
- enzyme activitiese3
- Direction
- notable changese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“including notable changes in sugar‐related enzyme activities (SPS, SuSy, α‐amylase and β‐amylase) and gene expression of RcINV , RcSUS , RcAmY , RcBAM and RcGBE1”
e0“Under salt stress, P N of cotyledons decreased significantly ( P < 0.05)”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Salt stress led to notable changes in gene expression of RcINV, RcSUS, RcAmY, RcBAM and RcGBE1 in Ricinus.
- Taxon
- Ricinus communisRicinus communise5
- Gene
- RcINV , RcSUS , RcAmY , RcBAM and RcGBE1e3
- Outcome
- gene expressione3
- Direction
- notable changese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“including notable changes in sugar‐related enzyme activities (SPS, SuSy, α‐amylase and β‐amylase) and gene expression of RcINV , RcSUS , RcAmY , RcBAM and RcGBE1”
e5“Ricinus communis is an important oilseed crop worldwide”
Claim · model-written summary
Salinity probably causes a functional imbalance between cotyledons and roots in Ricinus.
- Taxon
- Ricinus communisRicinus communise5
- Treatment
- salinitye4
- Outcome
- functional imbalance between cotyledons and rootse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The results suggest that salinity reduces photosynthesis of cotyledons, alters carbohydrate allocation between cotyledons and roots and also promotes starch utilization in cotyledons and starch biosynthesis in roots, leading to a functional imbalance between cotyledons and roots”
e5“Ricinus communis is an important oilseed crop worldwide”
The same questions in other papers
salinity · physiology: photosynthesis · Ricinus communis (castor bean)Results agree
6 papers in the same direction as this paper
- negative
- no effect
- negative
3 papers more in this group
See all 7 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.