Abstract
(1) Background: Cinnamic acid (CA) is a harmful substance secreted by the roots of continuous-cropping crops. (2) Methods: This study aimed to investigate how exogenous Si affects chlorophyll content and carbon metabolism in cucumber seedlings under CA-induced stress. (3) Results: The levels of chlorophyll a, chlorophyll b, chlorophyll a+b, and carotenoids were significantly reduced due to CA-induced stress. The addition of exogenous Si significantly alleviated this reduction. Under CA-induced stress, exogenous Si significantly increased the activities of ribulose-1,5-bisphosphate carboxylase, glyceraldehyde-3-phosphate dehydrogenase, fructose-1,6-bisphosphatase, fructose-1,6-bisphosphate aldolase, and transketolase. CA-induced stress significantly increased the fructose, glucose, and sucrose contents and reduced the starch content in the leaves and roots of seedlings. Similarly, the sucrose phosphate synthase, sucrose synthase, acid invertase, and neutral invertase activities were significantly reduced in plants under CA-induced stress. Overall, exogenous Si significantly reduced the soluble sugar content, increased the starch content, and promoted sucrose metabolism-related enzymatic activity in seedlings. (4) Conclusion: Exogenous Si can effectively increase the content of photosynthetic pigments in leaves of seedlings and maintain the balance of osmotic potential in the plant by reducing the accumulation of carbon assimilation products, which ultimately promotes tolerance to CA-induced autotoxicity stress.
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Claims 10
Claim · model-written summary
Cinnamic acid stress significantly reduced chlorophyll a, chlorophyll b, total chlorophyll and carotenoids.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- CA-induced stresse0
- Outcome
- chlorophyll a, chlorophyll b, chlorophyll a+b, and carotenoidse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“The levels of chlorophyll a, chlorophyll b, chlorophyll a+b, and carotenoids were significantly reduced due to CA-induced stress.”
Claim · model-written summary
Exogenous silicon significantly alleviated the pigment reduction caused by cinnamic acid.
- Taxon
- CucumberCucumis sativust0
- Treatment
- exogenous Sie0
- Outcome
- this reductione0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“The addition of exogenous Si significantly alleviated this reduction.”
Claim · model-written summary
Under cinnamic acid stress, silicon increased activities of five carbon fixation enzymes.
- Taxon
- CucumberCucumis sativust0
- Treatment
- exogenous Sie0
- Outcome
- activities of ribulose-1,5-bisphosphate carboxylase, glyceraldehyde-3-phosphate dehydrogenase, fructose-1,6-bisphosphatase, fructose-1,6-bisphosphate aldolase, and transketolasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“Under CA-induced stress, exogenous Si significantly increased the activities of ribulose-1,5-bisphosphate carboxylase, glyceraldehyde-3-phosphate dehydrogenase, fructose-1,6-bisphosphatase, fructose-1,6-bisphosphate aldolase, and transketolase.”
Claim · model-written summary
Cinnamic acid stress increased leaf and root fructose, glucose and sucrose contents.
- Taxon
- CucumberCucumis sativust0
- Organ / stage
- leaves and rootse0
- Treatment
- CA-induced stresse0
- Outcome
- fructose, glucose, and sucrose contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“CA-induced stress significantly increased the fructose, glucose, and sucrose contents and reduced the starch content in the leaves and roots of seedlings.”
Claim · model-written summary
Cinnamic acid stress reduced leaf and root starch content.
- Taxon
- CucumberCucumis sativust0
- Organ / stage
- leaves and rootse0
- Treatment
- CA-induced stresse0
- Outcome
- starch contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“CA-induced stress significantly increased the fructose, glucose, and sucrose contents and reduced the starch content in the leaves and roots of seedlings.”
Claim · model-written summary
Cinnamic acid stress reduced activities of four sucrose metabolism enzymes.
- Taxon
- CucumberCucumis sativust0
- Treatment
- CA-induced stresse0
- Outcome
- sucrose phosphate synthase, sucrose synthase, acid invertase, and neutral invertase activitiese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“the sucrose phosphate synthase, sucrose synthase, acid invertase, and neutral invertase activities were significantly reduced in plants under CA-induced stress.”
Claim · model-written summary
Exogenous silicon reduced soluble sugar content.
- Taxon
- CucumberCucumis sativust0
- Treatment
- exogenous Sie0
- Outcome
- soluble sugar contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“exogenous Si significantly reduced the soluble sugar content, increased the starch content, and promoted sucrose metabolism-related enzymatic activity in seedlings.”
Claim · model-written summary
Exogenous silicon increased starch content.
- Taxon
- CucumberCucumis sativust0
- Treatment
- exogenous Sie0
- Outcome
- starch contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“exogenous Si significantly reduced the soluble sugar content, increased the starch content, and promoted sucrose metabolism-related enzymatic activity in seedlings.”
Claim · model-written summary
Exogenous silicon promoted sucrose metabolism enzyme activity.
- Taxon
- CucumberCucumis sativust0
- Treatment
- exogenous Sie0
- Outcome
- sucrose metabolism-related enzymatic activitye0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“exogenous Si significantly reduced the soluble sugar content, increased the starch content, and promoted sucrose metabolism-related enzymatic activity in seedlings.”
Claim · model-written summary
Authors interpret silicon as promoting tolerance to cinnamic acid autotoxicity through pigment and carbon metabolism effects.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Exogenous Sie0
- Outcome
- tolerance to CA-induced autotoxicity stresse0
- Qualifier
- by reducing the accumulation of carbon assimilation productse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Seedlings”
e0“Exogenous Si can effectively increase the content of photosynthetic pigments in leaves of seedlings and maintain the balance of osmotic potential in the plant by reducing the accumulation of carbon assimilation products, which ultimately promotes tolerance to CA-induced autotoxicity stress.”
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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.