Abstract
Drought has a direct impact on rice growth performance at various stages. Nevertheless, the impact of nanoparticles on the rice seedlings under drought stress remained limited. Thus, a laboratory experiment was conducted to investigate the effects of different concentrations (300, 600, and 900 mg/L) of silica nanoparticles (SiNPs) on morpho-histological and biochemical features of two rice varieties (UMT-R and MR219) under drought stress (15 % PEG). The findings indicated a substantial reduction due to drought stress in the growth, protein, and antioxidant enzymes, while increasing the proline , malondialdehyde (MDA), and hydrogen peroxide (H 2 O 2 ) content, and negatively affecting the root histology. Results showed that SiNPs at 600 mg/L were managed to improve plant growth, root vigour, and enzymatic antioxidant levels. Under SiNPs treated plants, among UMT-R and MR219, the proline (1.947 and 1.748 in leaves, 2.010 and 1.890 U/mg protein in roots), peroxidase (POD) (2.850 and 3.512 in leaves, 2.521 and 2.952 U/mg protein in roots), superoxide dismutase (SOD) (3.958 and 4.558 in leaves, 4.296 and 4.606 U/mg protein in roots), and catalase (CAT) (2.171 and 2.289 in leaves, 1.897 and 2.050 U/mg protein in roots) were higher than the drought stress conditions. Meanwhile, the nonenzymatic antioxidant, MDA (0.974 and 0.812 in leaves, 0.842 and 0.778 U/mg Protein in roots), and H 2 O 2 (1.378 and 1.229 in leaves, 1.280 and 1.054 U/mg Protein in roots) showed an opposite trend. SiNPs application noticeably enhanced the histological features of roots under drought conditions. The current findings suggested that SiNPs at 600 mg/L can mitigate the adverse impacts of drought stress and enhance the plant's resistance. Further study should be carried out on the reproductive stage and post-harvest performance of drought-stress rice treated with SiNPs.
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Claims 12
Claim · model-written summary
Drought reduced rice seedling growth, protein, and antioxidant enzymes.
- Taxon
- rice
Oryza sativat0 - Treatment
- drought stresse0
- Outcome
- growth, protein, and antioxidant enzymese0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a substantial reduction due to drought stress in the growth, protein, and antioxidant enzymes”
t0“rice seedlings”
Claim · model-written summary
Drought increased proline, malondialdehyde, and hydrogen peroxide content.
- Taxon
- riceOryza sativat0
- Treatment
- drought stresse1
- Outcome
- proline , malondialdehyde (MDA), and hydrogen peroxide (H 2 O 2 ) contente0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the proline , malondialdehyde (MDA), and hydrogen peroxide (H 2 O 2 ) content”
t0“rice seedlings”
e1“due to drought stress”
Claim · model-written summary
Drought adversely affected root histology.
- Taxon
- riceOryza sativat0
- Treatment
- drought stresse1
- Outcome
- root histologye0
- Direction
- negatively affectinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negatively affecting the root histology”
t0“rice seedlings”
e1“due to drought stress”
Claim · model-written summary
Silica nanoparticles at 600 mg/L improved plant growth and root vigour.
- Taxon
- riceOryza sativat0
- Treatment
- SiNPs at 600 mg/Le0
- Outcome
- plant growth, root vigoure0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SiNPs at 600 mg/L were managed to improve plant growth, root vigour, and enzymatic antioxidant levels”
t0“rice seedlings”
Claim · model-written summary
Silica nanoparticles at 600 mg/L improved enzymatic antioxidant levels.
- Taxon
- riceOryza sativat0
- Treatment
- SiNPs at 600 mg/Le0
- Outcome
- enzymatic antioxidant levelse0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SiNPs at 600 mg/L were managed to improve plant growth, root vigour, and enzymatic antioxidant levels”
t0“rice seedlings”
Claim · model-written summary
Under nanoparticle treatment, proline was higher in leaves and roots of both varieties than under drought alone.
- Taxon
- riceOryza sativat0
- Material
- UMT-R and MR219e1
- Treatment
- SiNPs treated plantse1
- Outcome
- prolinee0
- Direction
- highere3
- Comparator
- drought stress conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proline (1.947 and 1.748 in leaves, 2.010 and 1.890 U/mg protein in roots)”
t0“rice seedlings”
e1“SiNPs treated plants, among UMT-R and MR219”
e2“drought stress conditions”
e3“were higher than the drought stress conditions”
Claim · model-written summary
Under nanoparticle treatment, peroxidase was higher in leaves and roots of both varieties than under drought alone.
- Taxon
- riceOryza sativat0
- Material
- UMT-R and MR219e1
- Treatment
- SiNPs treated plantse1
- Outcome
- peroxidase (POD)e0
- Direction
- highere3
- Comparator
- drought stress conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peroxidase (POD) (2.850 and 3.512 in leaves, 2.521 and 2.952 U/mg protein in roots)”
t0“rice seedlings”
e1“SiNPs treated plants, among UMT-R and MR219”
e2“drought stress conditions”
e3“were higher than the drought stress conditions”
Claim · model-written summary
Under nanoparticle treatment, superoxide dismutase was higher in leaves and roots of both varieties than under drought alone.
- Taxon
- riceOryza sativat0
- Material
- UMT-R and MR219e1
- Treatment
- SiNPs treated plantse1
- Outcome
- superoxide dismutase (SOD)e0
- Direction
- highere3
- Comparator
- drought stress conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“superoxide dismutase (SOD) (3.958 and 4.558 in leaves, 4.296 and 4.606 U/mg protein in roots)”
t0“rice seedlings”
e1“SiNPs treated plants, among UMT-R and MR219”
e2“drought stress conditions”
e3“were higher than the drought stress conditions”
Claim · model-written summary
Under nanoparticle treatment, catalase was higher in leaves and roots of both varieties than under drought alone.
- Taxon
- riceOryza sativat0
- Material
- UMT-R and MR219e1
- Treatment
- SiNPs treated plantse1
- Outcome
- catalase (CAT)e0
- Direction
- highere0
- Comparator
- drought stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“catalase (CAT) (2.171 and 2.289 in leaves, 1.897 and 2.050 U/mg protein in roots) were higher than the drought stress conditions”
t0“rice seedlings”
e1“SiNPs treated plants, among UMT-R and MR219”
Claim · model-written summary
Under nanoparticle treatment, malondialdehyde showed the opposite trend to the higher antioxidants.
- Taxon
- riceOryza sativat0
- Material
- UMT-R and MR219e1
- Treatment
- SiNPs treated plantse1
- Outcome
- MDAe0
- Comparator
- drought stress conditionse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA (0.974 and 0.812 in leaves, 0.842 and 0.778 U/mg Protein in roots)”
t0“rice seedlings”
e1“SiNPs treated plants, among UMT-R and MR219”
e2“drought stress conditions”
Claim · model-written summary
Under nanoparticle treatment, hydrogen peroxide showed the opposite trend to the higher antioxidants.
- Taxon
- riceOryza sativat0
- Material
- UMT-R and MR219e1
- Treatment
- SiNPs treated plantse1
- Outcome
- H 2 O 2e0
- Comparator
- drought stress conditionse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H 2 O 2 (1.378 and 1.229 in leaves, 1.280 and 1.054 U/mg Protein in roots) showed an opposite trend”
t0“rice seedlings”
e1“SiNPs treated plants, among UMT-R and MR219”
e2“drought stress conditions”
Claim · model-written summary
Silica nanoparticles enhanced root histological features under drought.
- Taxon
- riceOryza sativat0
- Treatment
- SiNPs applicatione0
- Outcome
- histological features of rootse0
- Direction
- enhancede0
- Qualifier
- under drought conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SiNPs application noticeably enhanced the histological features of roots under drought conditions”
t0“rice seedlings”
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