Abstract
Arsenic (As) is a phytotoxic element causing health hazards. This work investigates whether and how silicon (Si) alleviates As toxicity in wheat. The addition of Si under As-stress significantly improved morphophysiological characteristics, total protein, and membrane stability compared to As-stressed plants, suggesting that Si does have critical roles in As detoxification in wheat. Analysis of arsenate reductase activity and phytosiderophore (PS) release reveals their no involvement in the Si-mediated alleviation of As in wheat. Furthermore, Si supplementation in As-stressed plants showed a significant increase of As in roots but not in shoots compared with the plants grown under As stress. Further, gene expression analysis of two chelating molecules, TaPCS1 (phytochelatin synthase) and TaMT1 (metallothionein synthase) showed significant induction due to Si application under As stress compared with As-stressed plants. It is consistent with the physiological observations and suggests that alleviation of As toxicity in rice might be associated with As sequestration in roots leading to reduced As translocation in shoots. Furthermore, increased catalase, peroxidase, and glutathione reductase activities in roots imply the active involvement of reactive oxygen species scavenging for protecting wheat plants from As-induced oxidative injury. The study provides mechanistic evidence on the beneficial effect of Si on As toxicity in wheat plants.
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Claims 9
Claim · model-written summary
Silicon improved morphophysiological characteristics, total protein and membrane stability under arsenic stress.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Si under As-stresse0
- Outcome
- morphophysiological characteristics, total protein, and membrane stabilitye0
- Direction
- improvede0
- Comparator
- As-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of Si under As-stress significantly improved morphophysiological characteristics, total protein, and membrane stability compared to As-stressed plants, suggesting that Si does have critical roles in As detoxification in wheat”
Claim · model-written summary
Arsenate reductase activity was not involved in silicon mediated arsenic alleviation.
- Taxon
- wheatTriticum aestivume0
- Gene
- arsenate reductasee0
- Outcome
- no involvement in the Si-mediated alleviation of Ase0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of arsenate reductase activity and phytosiderophore (PS) release reveals their no involvement in the Si-mediated alleviation of As in wheat”
Claim · model-written summary
Phytosiderophore release was not involved in silicon mediated arsenic alleviation.
- Taxon
- wheatTriticum aestivume0
- Outcome
- no involvement in the Si-mediated alleviation of Ase0
- Qualifier
- phytosiderophore (PS) releasee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of arsenate reductase activity and phytosiderophore (PS) release reveals their no involvement in the Si-mediated alleviation of As in wheat”
Claim · model-written summary
Silicon significantly increased arsenic in roots under arsenic stress.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- rootse0
- Treatment
- Si supplementatione0
- Outcome
- As in rootse0
- Direction
- increasee0
- Comparator
- plants grown under As stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Si supplementation in As-stressed plants showed a significant increase of As in roots but not in shoots compared with the plants grown under As stress”
Claim · model-written summary
Silicon did not increase arsenic in shoots under arsenic stress.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- shootse0
- Treatment
- Si supplementatione0
- Outcome
- Ase0
- Direction
- not in shootse0
- Comparator
- plants grown under As stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Si supplementation in As-stressed plants showed a significant increase of As in roots but not in shoots compared with the plants grown under As stress”
Claim · model-written summary
Silicon significantly induced TaPCS1 expression under arsenic stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Si application under As stresse0
- Gene
- TaPCS1e0
- Outcome
- gene expressione0
- Direction
- inductione0
- Comparator
- As-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“gene expression analysis of two chelating molecules, TaPCS1 (phytochelatin synthase) and TaMT1 (metallothionein synthase) showed significant induction due to Si application under As stress compared with As-stressed plants”
Claim · model-written summary
Silicon significantly induced TaMT1 expression under arsenic stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Si application under As stresse0
- Gene
- TaMT1e0
- Outcome
- gene expressione0
- Direction
- inductione0
- Comparator
- As-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“gene expression analysis of two chelating molecules, TaPCS1 (phytochelatin synthase) and TaMT1 (metallothionein synthase) showed significant induction due to Si application under As stress compared with As-stressed plants”
Claim · model-written summary
The authors suggest silicon alleviation may involve arsenic sequestration in roots and reduced transport to shoots.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- alleviation of As toxicitye0
- Qualifier
- As sequestration in roots leading to reduced As translocation in shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“suggests that alleviation of As toxicity in rice might be associated with As sequestration in roots leading to reduced As translocation in shoots”
Claim · model-written summary
Root catalase, peroxidase and glutathione reductase activities increased, implying ROS scavenging involvement in protection.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- rootse0
- Gene
- catalase, peroxidase, and glutathione reductasee0
- Outcome
- protecting wheat plants from As-induced oxidative injurye0
- Direction
- increasede0
- Qualifier
- reactive oxygen species scavenginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased catalase, peroxidase, and glutathione reductase activities in roots imply the active involvement of reactive oxygen species scavenging for protecting wheat plants from As-induced oxidative injury”
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