Abstract
The involvement of jasmonic acid (JA) in the rice’s response to cadmium (Cd) stress is well recognized, though the underlying mechanisms remain unclear. In this study, exposure to Cd stress rapidly elevated endogenous JA concentrations in rice roots, meanwhile, a mutant coleoptile photomorphogenesis 2 (cpm2) which produces less JA, was more sensitive to Cd stress than its wild type (WT). JA mitigated Cd toxicity by decreasing Cd absorption in root cell wall and shoot, which was achieved by up-regulating the expression of the Cd-chelation and efflux-related genes such as OsHMA3, OsABCG36 and OsCAL1; down-regulating the transcript level of the Cd uptake and translocation-related genes, including OsHMA2, OsCCX2, OsNRAMP1/5, and OsZIP5/7. Additionally, a reduction in hemicellulose content was observed in the root cell wall. Further analysis indicated that the mitigation effect of JA on Cd accumulation was dependent on the inhibition of nitric oxide (NO) synthesis, as the NO donor SNP could diminish this effect. In summary, JA effectively reduced Cd content in rice by modulating the cell wall’s capacity for Cd uptake, potentially through reducing the production of NO. • Cd stress increased endogenous JA content. • JA enhanced the Cd resistance of rice. • JA improved the tolerance of rice towards Cd toxicity by decreasing the ability of root cell wall hemicelluloses to sequester Cd, thereby reducing its uptake into rice root cells. • JA regualted the genes expression levels involving Cd absorption, separation and translocation. • NO elimination is necessary for JA to reduce Cd toxicity.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Cadmium stress rapidly increased endogenous jasmonic acid in rice roots.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- rootse0
- Treatment
- Cd stresse0
- Outcome
- endogenous JA concentrationse0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to Cd stress rapidly elevated endogenous JA concentrations in rice roots”
Claim · model-written summary
The cpm2 mutant with less jasmonic acid was more cadmium sensitive than wild type.
- Taxon
- riceOryza sativae1
- Material
- coleoptile photomorphogenesis 2 (cpm2)e0
- Outcome
- sensitive to Cd stresse0
- Direction
- more sensitivee0
- Comparator
- wild type (WT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a mutant coleoptile photomorphogenesis 2 (cpm2) which produces less JA, was more sensitive to Cd stress than its wild type (WT)”
e1“rice roots”
Claim · model-written summary
Jasmonic acid reduced cadmium absorption in root cell wall and shoot.
- Taxon
- riceOryza sativae1
- Treatment
- JAe0
- Outcome
- Cd absorption in root cell wall and shoote0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JA mitigated Cd toxicity by decreasing Cd absorption in root cell wall and shoot”
e1“rice roots”
Claim · model-written summary
Jasmonic acid upregulated Cd chelation and efflux genes OsHMA3, OsABCG36 and OsCAL1.
- Taxon
- riceOryza sativae1
- Treatment
- JAe2
- Gene
- OsHMA3, OsABCG36 and OsCAL1e0
- Outcome
- expression of the Cd-chelation and efflux-related genese0
- Direction
- up-regulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“up-regulating the expression of the Cd-chelation and efflux-related genes such as OsHMA3, OsABCG36 and OsCAL1”
e1“rice roots”
e2“JA mitigated Cd toxicity”
Claim · model-written summary
Jasmonic acid downregulated Cd uptake and translocation genes OsHMA2, OsCCX2, OsNRAMP1/5 and OsZIP5/7.
- Taxon
- riceOryza sativae1
- Treatment
- JAe2
- Gene
- OsHMA2, OsCCX2, OsNRAMP1/5, and OsZIP5/7e0
- Outcome
- transcript level of the Cd uptake and translocation-related genese0
- Direction
- down-regulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“down-regulating the transcript level of the Cd uptake and translocation-related genes, including OsHMA2, OsCCX2, OsNRAMP1/5, and OsZIP5/7”
e1“rice roots”
e2“JA mitigated Cd toxicity”
Claim · model-written summary
Root cell wall hemicellulose content decreased.
- Taxon
- riceOryza sativae1
- Organ / stage
- root cell walle0
- Outcome
- hemicellulose contente0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reduction in hemicellulose content was observed in the root cell wall”
e1“rice roots”
Claim · model-written summary
The nitric oxide donor SNP diminished the jasmonic acid effect on cadmium accumulation.
- Taxon
- riceOryza sativae2
- Treatment
- NO donor SNPe0
- Outcome
- mitigation effect of JA on Cd accumulatione1
- Direction
- diminishe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the NO donor SNP could diminish this effect”
e1“mitigation effect of JA on Cd accumulation”
e2“rice roots”
The same questions in other papers
cadmium atom · molecular: metabolites · Oryza sativa (rice)Results differ
16 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
22 papers more in this group
See all 26 papers →sodium nitroprusside · nutrient: content · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →jasmonic acid · molecular: expression · Oryza sativa (rice)Positive and negative results
23 papers in the same direction as this paper · 5 in the opposite direction
- positive
- no effect
- negative
25 papers more in this group
See all 29 papers →heavy metal · molecular: metabolites · Oryza sativa (rice)Positive and negative results
13 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
17 papers more in this group
See all 21 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.