Abstract
The inessential heavy metal/loids cadmium (Cd) and arsenic (As), which often co-occur in polluted paddy soils, are toxic to rice. Silicon (Si) treatment is known to reduce Cd and As toxicity in rice plants. To better understand the shared mechanisms by which Si alleviates Cd and As stress, rice seedlings were hydroponically exposed to Cd or As, then treated with Si. The addition of Si significantly ameliorated the inhibitory effects of Cd and As on rice seedling growth. Si supplementation decreased Cd and As translocation from roots to shoots, and significantly reduced Cd- and As-induced reactive oxygen species generation in rice seedlings. Transcriptomics analyses were conducted to elucidate molecular mechanisms underlying the Si-mediated response to Cd or As stress in rice. The expression patterns of the differentially expressed genes in Cd- or As-stressed rice roots with and without Si application were compared. The transcriptomes of the Cd- and As-stressed rice roots were similarly and profoundly reshaped by Si application, suggesting that Si may play a fundamental, active role in plant defense against heavy metal/loid stresses by modulating whole genome expression. We also identified two novel genes, Os01g0524500 and Os06g0514800, encoding a myeloblastosis (MYB) transcription factor and a thionin, respectively, which may be candidate targets for Si to alleviate Cd and As stress in rice, as well as for the generation of Cd- and/or As-resistant plants. This study provides valuable resources for further clarification of the shared molecular mechanisms underlying the Si-mediated alleviation of Cd and As toxicity in rice.
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Claims 9
Claim · model-written summary
Silicon ameliorated cadmium inhibition of rice seedling growth.
- Taxon
- rice seedlings
Oryza sativat0 - Treatment
- Sie0
- Outcome
- inhibitory effects of Cde0
- Direction
- amelioratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of Si significantly ameliorated the inhibitory effects of Cd and As on rice seedling growth.”
t0“rice seedlings”
Claim · model-written summary
Silicon ameliorated arsenic inhibition of rice seedling growth.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Sie0
- Outcome
- inhibitory effects of Cd and Ase0
- Direction
- amelioratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of Si significantly ameliorated the inhibitory effects of Cd and As on rice seedling growth.”
t0“rice seedlings”
Claim · model-written summary
Silicon decreased cadmium translocation from roots to shoots.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Si supplementatione0
- Outcome
- Cd and As translocation from roots to shootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si supplementation decreased Cd and As translocation from roots to shoots, and significantly reduced Cd- and As-induced reactive oxygen species generation in rice seedlings.”
t0“rice seedlings”
Claim · model-written summary
Silicon decreased arsenic translocation from roots to shoots.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Si supplementatione0
- Outcome
- Cd and As translocation from roots to shootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si supplementation decreased Cd and As translocation from roots to shoots, and significantly reduced Cd- and As-induced reactive oxygen species generation in rice seedlings.”
t0“rice seedlings”
Claim · model-written summary
Silicon reduced cadmium-induced reactive oxygen species generation.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Si supplementatione0
- Outcome
- Cd- and As-induced reactive oxygen species generatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si supplementation decreased Cd and As translocation from roots to shoots, and significantly reduced Cd- and As-induced reactive oxygen species generation in rice seedlings.”
t0“rice seedlings”
Claim · model-written summary
Silicon reduced arsenic-induced reactive oxygen species generation.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Si supplementatione0
- Outcome
- Cd- and As-induced reactive oxygen species generatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si supplementation decreased Cd and As translocation from roots to shoots, and significantly reduced Cd- and As-induced reactive oxygen species generation in rice seedlings.”
t0“rice seedlings”
Claim · model-written summary
Silicon similarly and profoundly reshaped transcriptomes of cadmium-stressed rice roots.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Si applicatione0
- Outcome
- transcriptomes of the Cd- and As-stressed rice rootse0
- Direction
- reshapede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transcriptomes of the Cd- and As-stressed rice roots were similarly and profoundly reshaped by Si application, suggesting that Si may play a fundamental, active role in plant defense against heavy metal/loid stresses by modulating whole genome expression.”
t0“rice seedlings”
Claim · model-written summary
Os01g0524500 was identified as a candidate silicon target for alleviating cadmium and arsenic stress.
- Taxon
- riceOryza sativae0
- Gene
- Os01g0524500e0
- Outcome
- candidate targets for Si to alleviate Cd and As stress in ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We also identified two novel genes, Os01g0524500 and Os06g0514800, encoding a myeloblastosis (MYB) transcription factor and a thionin, respectively, which may be candidate targets for Si to alleviate Cd and As stress in rice, as well as for the generation of Cd- and/or As-resistant plants.”
Claim · model-written summary
Os06g0514800 was identified as a candidate silicon target for alleviating cadmium and arsenic stress.
- Taxon
- riceOryza sativae0
- Gene
- Os06g0514800e0
- Outcome
- candidate targets for Si to alleviate Cd and As stress in ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We also identified two novel genes, Os01g0524500 and Os06g0514800, encoding a myeloblastosis (MYB) transcription factor and a thionin, respectively, which may be candidate targets for Si to alleviate Cd and As stress in rice, as well as for the generation of Cd- and/or As-resistant plants.”
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See all 177 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.