Abstract
Nitric oxide (NO) plays a significant role in plant drought resistance. However, the effects of the exogenous application of NO to crops under drought stress vary within and among species. In this study, we explored the influence of exogenous sodium nitroprusside (SNP) on the drought resistance of soybean leaves in the full flowering stage using two varieties: drought-tolerant HN44 and non-drought-tolerant HN65. Spraying SNP on soybean leaves at the full flowering period under drought stress improved the NO content in soybean leaves. The activities of nitrite reductase (NiR) and nitrate reductase (NR) in leaves were affected by NO inhibition. The activity of antioxidant enzymes in leaves increased with the extension of SNP application time. Contents of osmomodulatory substances, including proline (Pro), soluble sugar (SS), and soluble protein (SP) increased gradually with the extension of SNP application time. The malondialdehyde (MDA) content decreased as the NO content increased, thus reducing membrane system damage. Overall, spraying SNP reduced damage and improved the ability of soybean to cope with drought. This study explored the physiological changes of SNP soybean under drought stress and provided theoretical basis for improving drought-resistant cultivation of soybean.
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Claims 6
Claim · model-written summary
SNP spraying increased leaf NO content during drought at full flowering.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- leaves at the full flowering periode0
- Treatment
- Spraying SNPe0
- Outcome
- NO contente0
- Direction
- improvede0
- Qualifier
- under drought stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying SNP on soybean leaves at the full flowering period under drought stress improved the NO content in soybean leaves”
Claim · model-written summary
NO inhibition affected nitrite and nitrate reductase activity in leaves.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- leavese0
- Gene
- nitrite reductase (NiR) and nitrate reductase (NR)e0
- Outcome
- activities of nitrite reductase (NiR) and nitrate reductase (NR)e0
- Qualifier
- NO inhibitione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of nitrite reductase (NiR) and nitrate reductase (NR) in leaves were affected by NO inhibition”
t0“Soybean Leaves”
Claim · model-written summary
Leaf antioxidant enzyme activity increased with longer SNP application.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- leavese0
- Treatment
- SNP application timee0
- Outcome
- activity of antioxidant enzymese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of antioxidant enzymes in leaves increased with the extension of SNP application time”
t0“Soybean Leaves”
Claim · model-written summary
Leaf proline, soluble sugar and soluble protein increased as SNP application time lengthened.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- SNP application timee0
- Outcome
- proline (Pro), soluble sugar (SS), and soluble protein (SP)e0
- Direction
- increased graduallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Contents of osmomodulatory substances, including proline (Pro), soluble sugar (SS), and soluble protein (SP) increased gradually with the extension of SNP application time”
t0“Soybean Leaves”
Claim · model-written summary
Malondialdehyde content declined as NO content increased.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- Leavest0
- Compound
- NOe0
- Outcome
- malondialdehyde (MDA) contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The malondialdehyde (MDA) content decreased as the NO content increased”
t0“Soybean Leaves”
Claim · model-written summary
SNP spraying reduced drought damage and improved soybean drought coping ability.
- Taxon
- soybeanGlycine maxe0
- Treatment
- spraying SNPe0
- Outcome
- damagee0
- Direction
- reducede0
- Qualifier
- cope with droughte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, spraying SNP reduced damage and improved the ability of soybean to cope with drought”
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