Abstract
Salt is regarded as a main cause for reduced yield under challenging conditions. Mungbean, a valuable protein crop, is sensitive to salt stress, leading to yield shortage. The growth hormone, salicylic acid (SA), enhances several processes necessary to confer salt tolerance and relieves poor agricultural yield. Seeds of mungbean were initially pretreated with SA (0.5 mM) for 4 h before sowing, while under a cumulative combination of SA + salt regimes: control, SA, 100 mM, SA +100 mM, 200 mM and SA +200 mM. Our study examined photosynthesis parameters such as photosynthetic pigment concentration, chlorophyll a fluorescence, protein, proline, and antioxidant enzymes in plants subjected to single and combined SA + salt stress concentrations. The result showed a greater decline in SPAD and photosynthetic quantum yield under 200 mM NaCl at 43% in Var. 145 than in Var. 155 at 32% compared to 11% in SA +100 mM and 34% in SA + 200 mM treatments in both varieties. Var. 145 was found to be more sensitive to 100 and 200 mM NaCl salt stress. In Var. 155, chlorophyll a and chlorophyll b concentrations were higher under control 52%, SA + 100 mM 49%, and SA +200 mM 42% than in Var. 145 at 51%, 38%, and 31%. Protein and proline revealed a higher content in Var. 155 in contrast to the lower activity in Var. 145. The enhanced performance of the Var. 155 exposed to SA + salt stress was followed by an increase in the activities of peroxidase (POD), CAT while the activity of MDA revealed a significant increase in Var. 145 under 100 mM 43% and 200 mM 48% NaCl treatment compared to Var. 155, which had 38% and 34%. The above results suggest that SA-treated Var. 155 confers tolerance to salt stress and is accompanied with a high osmoprotectant responses as provided by SA in Var. 155 than Var. 145. The potency of SA in providing salt tolerance capacity to plants is a future research interest to maintain sustainable yield in mungbean seedlings.
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Claims 7
Claim · model-written summary
At 200 mM NaCl, SPAD and quantum yield declined more in Var. 145 than Var. 155.
- Taxon
- Mungbean
.jpg?width=60)
Vigna radiatat0 - Material
- Var. 145e0
- Treatment
- 200 mM NaCle0
- Outcome
- SPAD and photosynthetic quantum yielde0
- Direction
- greater declinee0
- Value
- 43%e0
- Comparator
- Var. 155e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The result showed a greater decline in SPAD and photosynthetic quantum yield under 200 mM NaCl at 43% in Var. 145 than in Var. 155 at 32% compared to 11% in SA +100 mM and 34% in SA + 200 mM treatments in both varieties.”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
Claim · model-written summary
Var. 145 was more sensitive to 100 and 200 mM NaCl.
- Taxon
- MungbeanVigna radiatat0
- Material
- Var. 145e0
- Outcome
- sensitive to 100 and 200 mM NaCl salt stresse0
- Direction
- more sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Var. 145 was found to be more sensitive to 100 and 200 mM NaCl salt stress.”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
Claim · model-written summary
Chlorophyll a and b were higher in Var. 155 under control and SA plus salt conditions.
- Taxon
- MungbeanVigna radiatat0
- Material
- Var. 155e0
- Outcome
- chlorophyll a and chlorophyll b concentrationse0
- Direction
- highere0
- Comparator
- Var. 145e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Var. 155, chlorophyll a and chlorophyll b concentrations were higher under control 52%, SA + 100 mM 49%, and SA +200 mM 42% than in Var. 145 at 51%, 38%, and 31%.”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
Claim · model-written summary
Protein and proline content was higher in Var. 155 than Var. 145.
- Taxon
- MungbeanVigna radiatat0
- Material
- Var. 155e0
- Outcome
- Protein and prolinee0
- Direction
- highere0
- Comparator
- Var. 145e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Protein and proline revealed a higher content in Var. 155 in contrast to the lower activity in Var. 145.”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
Claim · model-written summary
POD and CAT activities increased in Var. 155 exposed to SA and salt.
- Taxon
- MungbeanVigna radiatat0
- Material
- Var. 155e0
- Treatment
- SA + salt stresse0
- Outcome
- activities of peroxidase (POD), CATe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enhanced performance of the Var. 155 exposed to SA + salt stress was followed by an increase in the activities of peroxidase (POD), CAT”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
Claim · model-written summary
MDA activity increased significantly in Var. 145 under 100 mM NaCl, by 43%.
- Taxon
- MungbeanVigna radiatat0
- Material
- Var. 145e0
- Treatment
- 100 mMe0
- Outcome
- activity of MDAe0
- Direction
- increasee0
- Value
- 43%e0
- Comparator
- Var. 155e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity of MDA revealed a significant increase in Var. 145 under 100 mM 43% and 200 mM 48% NaCl treatment compared to Var. 155, which had 38% and 34%.”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
Claim · model-written summary
MDA activity increased significantly in Var. 145 under 200 mM NaCl, by 48%.
- Taxon
- MungbeanVigna radiatat0
- Material
- Var. 145e0
- Treatment
- 200 mMe0
- Outcome
- activity of MDAe0
- Direction
- increasee0
- Value
- 48%e0
- Comparator
- Var. 155e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity of MDA revealed a significant increase in Var. 145 under 100 mM 43% and 200 mM 48% NaCl treatment compared to Var. 155, which had 38% and 34%.”
t0“Mungbean [Vigna radiata (L.) R. Wilczek]”
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