Abstract
Ultraviolet (UV) solar radiations have received greater attention during recent years, mainly due to depletion of stratospheric ozone and hence their consequent increase.The heightened incidence of drought stress resulting from climate change is creating a challenging environment for plant life.The aim of the present study was to investigate the response of mungbean seedlings to these stressors singly and in combinations (UV-B and PEG 6000) on seed germination and early seedling growth parameters.Mungbean (Vigna radiata L.) is a leguminous species grown in different parts of the world, especially in Asia including India where it is a common source of protein in the nutrient supplements.The seeds were exposed to 2 h of UV-B irradiation for three days and drought condition was generated by supplying polyethylene glycol 6000(PEG 6000) solution of 10% for five days.The combined stress was given by supplying UV-B (2h for 3 days) + 10% PEG (for 5 days) together.After five days, early growth parameters, enzymes related to seed germination (total amylase and protease) and biochemical parameters were analyzed in seedlings.The results revealed that both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II.UV-B and drought exposure independently caused significant inhibition of total amylase and protease activities in roots and shoots of 5 day old mungbean seedlings.Further, the oxidative stress-associated markers such as proline and hydrogen peroxide (H 2 O 2 ) were found to increase in response to both the stresses in root as well as shoot tissues.Exposure to both UV-B radiation and drought stress negatively affect various indicators of plant growth and health, including increased production of H 2 O 2 , which can damage crucial biomolecules like DNA, RNA, and proteins.The observed reductions in germination, seedling growth, vigor, and key biochemical parameters suggest a synergistic interaction between these two stressors.Despite these negative impacts, simultaneous increase in proline and H 2 O 2 levels under UV-B, PEG (drought), and combined stress conditions may point towards an adaptive response and a degree of tolerance to these stressors.
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Claims 12
Claim · model-written summary
UV-B irradiation reduced percent germination, root, shoot and seedling length of mungbean seedlings
- Taxon
- Mungbean
.jpg?width=60)
Vigna radiatat0 - Treatment
- UV-B irradiatione2
- Outcome
- percent germination, root, shoot and seedling lengthe1
- Direction
- negativee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Mungbean”
e1“both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II”
e2“The seeds were exposed to 2 h of UV-B irradiation for three days”
Claim · model-written summary
UV-B irradiation reduced fresh and dry weight of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Treatment
- UV-B irradiatione2
- Outcome
- fresh and dry weight of seedlingse1
- Direction
- negativee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II”
e2“The seeds were exposed to 2 h of UV-B irradiation for three days”
Claim · model-written summary
UV-B irradiation reduced vigour index I and II of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Treatment
- UV-B irradiatione2
- Outcome
- vigour index-I and IIe1
- Direction
- negativee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II”
e2“The seeds were exposed to 2 h of UV-B irradiation for three days”
Claim · model-written summary
Drought condition reduced percent germination, root, shoot and seedling length of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Treatment
- drought conditione2
- Outcome
- percent germination, root, shoot and seedling lengthe1
- Direction
- negativee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II”
e2“drought condition was generated by supplying polyethylene glycol 6000(PEG 6000) solution of 10% for five days”
Claim · model-written summary
Drought condition reduced fresh and dry weight of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Treatment
- drought conditione2
- Outcome
- fresh and dry weight of seedlingse1
- Direction
- negativee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II”
e2“drought condition was generated by supplying polyethylene glycol 6000(PEG 6000) solution of 10% for five days”
Claim · model-written summary
Drought condition reduced vigour index I and II of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Treatment
- drought conditione2
- Outcome
- vigour index-I and IIe1
- Direction
- negativee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“both UV-B and drought stress have substantial negative effects on percent germination, root, shoot and seedling length, fresh and dry weight of seedlings, vigour index-I and II”
e2“drought condition was generated by supplying polyethylene glycol 6000(PEG 6000) solution of 10% for five days”
Claim · model-written summary
UV-B significantly inhibited total amylase and protease activities in roots and shoots of 5-day-old mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Organ / stage
- roots and shootse1
- Treatment
- UV-Be1
- Outcome
- total amylase and protease activitiese1
- Direction
- inhibitione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“UV-B and drought exposure independently caused significant inhibition of total amylase and protease activities in roots and shoots of 5 day old mungbean seedlings”
Claim · model-written summary
Drought significantly inhibited total amylase and protease activities in roots and shoots of 5-day-old mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Organ / stage
- roots and shootse1
- Treatment
- drought exposuree1
- Outcome
- total amylase and protease activitiese1
- Direction
- inhibitione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“UV-B and drought exposure independently caused significant inhibition of total amylase and protease activities in roots and shoots of 5 day old mungbean seedlings”
Claim · model-written summary
UV-B irradiation increased proline and hydrogen peroxide in root and shoot tissues of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Organ / stage
- root as well as shoot tissuese1
- Treatment
- UV-B irradiatione2
- Outcome
- proline and hydrogen peroxidee1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“the oxidative stress-associated markers such as proline and hydrogen peroxide (H 2 O 2 ) were found to increase in response to both the stresses in root as well as shoot tissues”
e2“The seeds were exposed to 2 h of UV-B irradiation for three days”
Claim · model-written summary
Drought increased proline and hydrogen peroxide in root and shoot tissues of mungbean seedlings
- Taxon
- MungbeanVigna radiatat0
- Organ / stage
- root as well as shoot tissuese1
- Treatment
- drought conditione2
- Outcome
- proline and hydrogen peroxidee1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“the oxidative stress-associated markers such as proline and hydrogen peroxide (H 2 O 2 ) were found to increase in response to both the stresses in root as well as shoot tissues”
e2“drought condition was generated by supplying polyethylene glycol 6000(PEG 6000) solution of 10% for five days”
Claim · model-written summary
The reductions under combined UV-B and drought suggest a synergistic interaction between the two stressors
- Taxon
- MungbeanVigna radiatat0
- Treatment
- combined stresse2
- Outcome
- germination, seedling growth, vigor, and key biochemical parameterse1
- Qualifier
- synergistic interactione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“The observed reductions in germination, seedling growth, vigor, and key biochemical parameters suggest a synergistic interaction between these two stressors”
e2“The combined stress was given by supplying UV-B (2h for 3 days) + 10% PEG (for 5 days) together”
Claim · model-written summary
Simultaneous increase in proline and H2O2 under the stress conditions may point to an adaptive response and some tolerance
- Taxon
- MungbeanVigna radiatat0
- Treatment
- combined stress conditionse1
- Compound
- prolinee1
- Outcome
- adaptive response and a degree of tolerancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mungbean”
e1“simultaneous increase in proline and H 2 O 2 levels under UV-B, PEG (drought), and combined stress conditions may point towards an adaptive response and a degree of tolerance to these stressors”
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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.