Abstract
Salinity is the most damaging factor towards crop production. The aim of this study was to investigate the possible role of thiourea in salinity tolerance. These experiments were carried out on two maize hybrids (DK6789 and 33M15) using the optimized thiourea level (400 M) in autumn and spring seasons, and the growth and physiological attributes were observed. Salt stress caused a substantial suppression of growth, and damaging effects were observed, as reduction in shoot and root length, their fresh and dry weights, decreased root number and shoot/root ratio, increased accumulation of H 2 O 2 , malondialdehyde (MDA) in root and shoot tissues, and enhancement in activities of some key antioxidant enzymes (catalase, peroxidase and superoxide dismutase) with altered ascorbate peroxidase level in leaves of both maize hybrids. Medium supplemented thiourea was found to be very effective in improving growth may be due to decreased H 2 O 2 , MDA and further enhanced the activities of antioxidants with higher accumulation of ascorbate peroxidase under control and saline conditions. Salinity tolerance induced by thiourea was superior in the spring than in autumn grown maize. From the changes in the growth and physiological attributes of maize, it can be concluded that thiourea application has a great potential to alleviate the deteriorating effects of salt stress on maize and is recommended for improving growth in marginally to moderately saline soils.
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Claims 11
Claim · model-written summary
Salt stress reduced shoot and root length, fresh and dry weights, root number and shoot/root ratio.
- Treatment
- Salt stresse0
- Outcome
- shoot and root length, their fresh and dry weightse0
- Direction
- reductione0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress caused a substantial suppression of growth, and damaging effects were observed, as reduction in shoot and root length, their fresh and dry weights, decreased root number and shoot/root ratio”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Salt stress decreased root number and shoot/root ratio.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased root number and shoot/root ratio”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Salt stress increased hydrogen peroxide and MDA in root and shoot tissues.
- Organ / stage
- root and shoot tissuese0
- Treatment
- Salt stresse1
- Outcome
- accumulation of H 2 O 2 , malondialdehyde (MDA)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased accumulation of H 2 O 2 , malondialdehyde (MDA) in root and shoot tissues”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Salt stress enhanced catalase, peroxidase and superoxide dismutase activity.
- Treatment
- Salt stresse1
- Outcome
- activities of some key antioxidant enzymes (catalase, peroxidase and superoxide dismutase)e0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhancement in activities of some key antioxidant enzymes (catalase, peroxidase and superoxide dismutase)”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Salt stress altered leaf ascorbate peroxidase level.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“altered ascorbate peroxidase level in leaves of both maize hybrids”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Thiourea improved maize growth under control and saline conditions.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Medium supplemented thiourea was found to be very effective in improving growth”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Thiourea decreased hydrogen peroxide and MDA.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased H 2 O 2 , MDA”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Thiourea further enhanced antioxidant activities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“further enhanced the activities of antioxidants”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Thiourea increased accumulation of ascorbate peroxidase.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher accumulation of ascorbate peroxidase under control and saline conditions”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
Thiourea induced greater salinity tolerance in spring than autumn grown maize.
- Treatment
- thioureae0
- Outcome
- Salinity tolerancee0
- Direction
- superiore0
- Comparator
- autumn grown maizee0
- Setting
- springe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity tolerance induced by thiourea was superior in the spring than in autumn grown maize.”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
Claim · model-written summary
The authors recommend thiourea to improve growth in marginally to moderately saline soils.
- Treatment
- thiourea applicatione0
- Outcome
- recommended for improving growth in marginally to moderately saline soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thiourea application has a great potential to alleviate the deteriorating effects of salt stress on maize and is recommended for improving growth in marginally to moderately saline soils.”
t0“Hybrid Maize”
e1“Salt stress caused a substantial suppression of growth”
e2“Medium supplemented thiourea was found to be very effective in improving growth”
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See all 257 papers →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.