Abstract
The objective of this research was to determine the foliar application of L-ornithine (0.0, 0.30 and 0.60 mM) as a precursor of polyamines, at vegetative stage was on antioxidant defense and growth of drought stressed sugar beet plants grown under clay and sandy soil conditions. Two water irrigation treatments (80% and 40% Field capacity) were carried out on sugar beet plants grown in pots under greenhouse conditions. Water stress resulted in significantly decrement in growth parameters including root diameter, root and shoot weights per plant compared with corresponding control plants. The results showed that drought stress significantly affected most biochemical characteristics of plants. Photosynthetic pigments contents, free amino acids and peroxidase enzyme activity were decreased, while catalase enzyme activity and lipid peroxidation was increased with drought stress. On the other hand, foliar application of L-ornithine effectively alleviated harmful effects caused by drought stress on root length, root and shoot weights of sugar beet plants, especially under sandy soil conditions. The results cleared that ameliorating the negative effects of drought stress through exogenously applied L-ornithine associated with improved photosynthetic pigments, protein profile, lipid peroxidation, antioxidant enzymes; catalase and peroxidase, total soluble sugars and total amino led to increasing drought tolerance of sugar beet plants.
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Claims 5
Claim · model-written summary
Drought reduced root diameter and root and shoot weights.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Treatment
- Water stresse0
- Outcome
- root diameter, root and shoot weights per plante0
- Direction
- decremente0
- Comparator
- corresponding control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress resulted in significantly decrement in growth parameters including root diameter, root and shoot weights per plant compared with corresponding control plants”
t0“sugar beet”
Claim · model-written summary
Drought decreased photosynthetic pigments, free amino acids, and peroxidase activity.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- drought stresse1
- Outcome
- Photosynthetic pigments contents, free amino acids and peroxidase enzyme activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic pigments contents, free amino acids and peroxidase enzyme activity were decreased”
t0“sugar beet”
e1“increased with drought stress”
Claim · model-written summary
Drought increased catalase activity and lipid peroxidation.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- drought stresse0
- Outcome
- catalase enzyme activity and lipid peroxidatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“catalase enzyme activity and lipid peroxidation was increased with drought stress”
t0“sugar beet”
Claim · model-written summary
Foliar ornithine alleviated drought damage to root length and root and shoot weights, especially in sandy soil.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- foliar application of L-ornithinee0
- Outcome
- root length, root and shoot weightse0
- Direction
- alleviatede0
- Setting
- sandy soil conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of L-ornithine effectively alleviated harmful effects caused by drought stress on root length, root and shoot weights of sugar beet plants, especially under sandy soil conditions”
Claim · model-written summary
Authors link ornithine-associated physiological changes with greater drought tolerance.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- exogenously applied L-ornithinee0
- Outcome
- drought tolerancee0
- Direction
- increasinge0
- Qualifier
- improved photosynthetic pigments, protein profile, lipid peroxidation, antioxidant enzymes; catalase and peroxidase, total soluble sugars and total aminoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenously applied L-ornithine associated with improved photosynthetic pigments, protein profile, lipid peroxidation, antioxidant enzymes; catalase and peroxidase, total soluble sugars and total amino led to increasing drought tolerance of sugar beet plants”
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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.