Abstract
The study aimed to determine the effects of humic acid (HA) on seedlings of a salt-sensitive plant, mung bean (Vigna radiata (L.) Wilczek), grown on 50 mM (S1) and 100 mM (S2) NaCl concentrations. In controlled room conditions, mung bean seedlings were planted in pots containing torf and perlite mixture and salt effects were observed. The growth parameters were plant height, number of leaves, leaf area, leaf and stem fresh and dry weights in which all parameters significantly decreased at both salt levels. Nutrient analyses of Na, K and Ca were conducted by flame photometry (FP), and Mg, Mn, Zn were tested by inductively coupled plasma atomic emission spectrometry (ICP-AES), for the above and below ground parts of mung bean seedlings. Both salt treatments increased Na content significantly, however 10 ml addition of HA to those samples (S1HA and S2HA; 50 mM NaCl and 100 mM NaCl, respectively) caused reductions in Na contents of the above-ground parts of mung bean compared to plants watered with only Hoagland-Arnon solutions (HO). On the other hand, in the roots of mung bean seedlings, Na content rose significantly in S2 compared with control, but the amount of Na in S2HA significantly increased compared with S2 treated plants. K content was significantly decreased in both salt concentrations, while SHA1 and SHA2 caused slight increases in both above and underground parts of seedlings. In the experiment, SHA2 increased the content of K, Mg, Ca, Mn and Zn in the root of mung bean seedlings compared with both S1 and S2 treatments. Key words: NaCl, mung bean, growth, nutrient Vigna radiata, humic acid.
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Claims 9
Claim · model-written summary
Both salt levels significantly decreased seedling growth measures.
- Taxon
- mung bean
.jpg?width=60)
Vigna radiatat0 - Treatment
- both salt levelse0
- Outcome
- plant height, number of leaves, leaf area, leaf and stem fresh and dry weightse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The growth parameters were plant height, number of leaves, leaf area, leaf and stem fresh and dry weights in which all parameters significantly decreased at both salt levels.”
t0“mung bean”
Claim · model-written summary
Both salt treatments significantly increased sodium content.
- Taxon
- mung beanVigna radiatat0
- Treatment
- Both salt treatmentse0
- Outcome
- Na contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both salt treatments increased Na content significantly”
t0“mung bean”
Claim · model-written summary
Humic acid reduced above-ground sodium content under salt treatment relative to Hoagland-Arnon-only plants.
- Taxon
- mung beanVigna radiatae0
- Treatment
- 10 ml addition of HAe0
- Outcome
- Na contents of the above-ground partse0
- Direction
- reductionse0
- Comparator
- plants watered with only Hoagland-Arnon solutions (HO)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10 ml addition of HA to those samples (S1HA and S2HA; 50 mM NaCl and 100 mM NaCl, respectively) caused reductions in Na contents of the above-ground parts of mung bean compared to plants watered with only Hoagland-Arnon solutions (HO).”
Claim · model-written summary
100 mM NaCl significantly increased root sodium versus control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the roots of mung bean seedlings, Na content rose significantly in S2 compared with control”
Claim · model-written summary
Humic acid with S2 significantly increased root sodium versus S2 alone.
- Taxon
- mung beanVigna radiatat0
- Treatment
- S2HAe0
- Outcome
- amount of Nae0
- Direction
- increasede0
- Comparator
- S2 treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of Na in S2HA significantly increased compared with S2 treated plants.”
t0“mung bean”
Claim · model-written summary
Both salt concentrations significantly decreased potassium content.
- Taxon
- mung beanVigna radiatat0
- Treatment
- both salt concentrationse0
- Outcome
- K contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K content was significantly decreased in both salt concentrations”
t0“mung bean”
Claim · model-written summary
SHA1 and SHA2 slightly increased potassium in above- and below-ground seedling parts.
- Taxon
- mung beanVigna radiatat0
- Treatment
- SHA1 and SHA2e0
- Outcome
- slight increases in both above and underground parts of seedlingse0
- Direction
- increasese0
- Qualifier
- K contente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SHA1 and SHA2 caused slight increases in both above and underground parts of seedlings.”
t0“mung bean”
e1“K content”
Claim · model-written summary
SHA2 increased root K, Mg and Ca relative to S1 and S2.
- Taxon
- mung beanVigna radiatae0
- Treatment
- SHA2e0
- Outcome
- content of K, Mg, Cae0
- Direction
- increasede0
- Comparator
- both S1 and S2 treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SHA2 increased the content of K, Mg, Ca, Mn and Zn in the root of mung bean seedlings compared with both S1 and S2 treatments.”
Claim · model-written summary
SHA2 increased root Mn and Zn relative to S1 and S2.
- Taxon
- mung beanVigna radiatae0
- Treatment
- SHA2e0
- Outcome
- Mn and Zne0
- Direction
- increasede0
- Comparator
- both S1 and S2 treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SHA2 increased the content of K, Mg, Ca, Mn and Zn in the root of mung bean seedlings compared with both S1 and S2 treatments.”
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