Abstract
Excessive heavy metal content in soil can seriously hinder plant physiological metabolism and growth. This study, with soybean, examined how drip irrigation reduced heavy metal toxicity. The drip irrigation experiments with four irrigation frequencies were conducted by controlling the lower limit of the soil matric potential (D1: −10 kPa; D2: −20 kPa; D3: −30 kPa; D4: −40 kPa). Through comparison with traditional surface irrigation, the effects of drip irrigation on heavy metal distribution, soybean growth status, physiological metabolism and transcriptome under Cd, Pb and Cr(VI) composite pollution were comprehensively analyzed. The results show that (i) The Cd, Pb and Cr(IV) in soil migrated away from the plant under drip irrigation, thereby reducing the inhibition of heavy metal stress on soybean growth at the root, among which D1 had the best improvement effect on soybean growth. (ii) Drip irrigation improved the resistance of soybean to heavy metal stress, and promoted the transport and fixation of free Cd2+, Pb2+ and Cr6+ in cells, thereby reducing the damage of oxidative stress and heavy metal ions to cell structure. (iii) Drip irrigation was conducive to the energy supply and protein stability of cell physiological metabolism, which helped the improvement of soybean physiological activity. Overall, compared with surface irrigation, drip irrigation reduced the toxicity of heavy metals to soybeans by moving heavy metals out of the root zone and enhancing physiological activity. The results of this study can provide a theoretical basis for the application of drip irrigation technology in the prevention and control of heavy metal pollution, and provide a new strategy for the safe production of agriculture.
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Claims 8
Claim · model-written summary
Drip irrigation moved heavy metals away from soybean roots.
- Taxon
- soybean
Glycine maxe0 - Treatment
- drip irrigatione0
- Outcome
- Cd, Pb and Cr(IV) in soile0
- Direction
- migrated awaye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd, Pb and Cr(IV) in soil migrated away from the plant under drip irrigation, thereby reducing the inhibition of heavy metal stress on soybean growth at the root”
Claim · model-written summary
Drip irrigation reduced inhibition of soybean root growth by heavy metal stress.
- Taxon
- soybeanGlycine maxe0
- Treatment
- drip irrigatione0
- Outcome
- inhibition of heavy metal stress on soybean growth at the roote0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd, Pb and Cr(IV) in soil migrated away from the plant under drip irrigation, thereby reducing the inhibition of heavy metal stress on soybean growth at the root”
Claim · model-written summary
D1 had the best improvement effect on soybean growth.
- Taxon
- soybeanGlycine maxe0
- Outcome
- soybean growthe0
- Direction
- best improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“among which D1 had the best improvement effect on soybean growth”
e1“D1: −10 kPa”
Claim · model-written summary
Drip irrigation improved soybean resistance to heavy metal stress.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Drip irrigatione0
- Outcome
- resistance of soybean to heavy metal stresse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drip irrigation improved the resistance of soybean to heavy metal stress”
Claim · model-written summary
Drip irrigation promoted transport and fixation of free metal ions in cells.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Drip irrigatione0
- Outcome
- transport and fixation of free Cd2+, Pb2+ and Cr6+ in cellse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drip irrigation improved the resistance of soybean to heavy metal stress, and promoted the transport and fixation of free Cd2+, Pb2+ and Cr6+ in cells”
Claim · model-written summary
Drip irrigation reduced oxidative and metal ion damage to cell structure.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Drip irrigatione1
- Outcome
- damage of oxidative stress and heavy metal ions to cell structuree0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thereby reducing the damage of oxidative stress and heavy metal ions to cell structure”
e1“Drip irrigation improved the resistance of soybean to heavy metal stress”
Claim · model-written summary
Drip irrigation supported cellular energy supply and protein stability.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Drip irrigatione0
- Outcome
- energy supply and protein stability of cell physiological metabolisme0
- Direction
- conducivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drip irrigation was conducive to the energy supply and protein stability of cell physiological metabolism”
e1“This study, with soybean”
Claim · model-written summary
Drip irrigation improved soybean physiological activity.
- Taxon
- soybeansGlycine maxe0
- Treatment
- drip irrigatione0
- Outcome
- physiological activitye0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drip irrigation reduced the toxicity of heavy metals to soybeans by moving heavy metals out of the root zone and enhancing physiological activity”
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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.