Abstract
Brassinoids are plant steroidal hormones that are ubiquitous in the plant kingdom and regulate a wide range of physiological and stress responses. In a plastic tunnel pot bioassay experiment, three levels of 28-homobrassinolide (HBL) at 1, 3, and 5 μmol L−1 were tested for growth and physiological attributes of cucumber cultivars ‘Jinyou 1’ (salt-sensitive) and ‘Changchun Mici’ (salt-tolerant), grown at various salt stress conditions (60 and 120 mmol L−1). Cucumber plants of both cultivars subjected to salt stress exhibited reduced growth attributes and altered antioxidant enzymes at 60 and 120 mmol L−1. However, the deleterious effects of salt stress were partially improved by HBL. The foliar application of HBL enhanced shoot and root fresh and dry weight and chlorophyll content at 60 and 120 mmol L−1 NaCl stress in ‘Jinyou 1’ and ‘Changchun Mici’, respectively. Homobrassinolide application also altered the antioxidant enzyme levels by increasing super oxide dismutase and peroxidase levels and decreased malondialdehyde content under 60 and 120 mmol L−1 stress in both plant cultivars. Overall results showed that HBL could enhance growth attributes, chlorophyll content, and antioxidant enzymes for both of the cultivars under mild and high NaCl stress.
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Claims 7
Claim · model-written summary
Salt stress reduced growth attributes in both cucumber cultivars at 60 and 120 mmol L−1.
- Taxon
- Cucumber (Cucumis sativus L.)
Cucumis sativust0 - Treatment
- salt stresse0
- Outcome
- growth attributese0
- Direction
- reducede0
- Qualifier
- 60 and 120 mmol L−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“Cucumber plants of both cultivars subjected to salt stress exhibited reduced growth attributes and altered antioxidant enzymes at 60 and 120 mmol L−1.”
Claim · model-written summary
Salt stress altered antioxidant enzymes in both cucumber cultivars.
- Taxon
- Cucumber (Cucumis sativus L.)Cucumis sativust0
- Treatment
- salt stresse0
- Outcome
- antioxidant enzymese0
- Qualifier
- 60 and 120 mmol L−1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“Cucumber plants of both cultivars subjected to salt stress exhibited reduced growth attributes and altered antioxidant enzymes at 60 and 120 mmol L−1.”
Claim · model-written summary
HBL partly improved the harmful effects of salt stress on cucumber.
- Taxon
- Cucumber (Cucumis sativus L.)Cucumis sativust0
- Treatment
- HBLe0
- Outcome
- deleterious effects of salt stresse0
- Direction
- improvede0
- Qualifier
- partiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“However, the deleterious effects of salt stress were partially improved by HBL.”
Claim · model-written summary
HBL increased shoot and root fresh and dry weight in the tested cucumber cultivars under NaCl stress.
- Taxon
- Cucumber (Cucumis sativus L.)Cucumis sativust0
- Material
- ‘Jinyou 1’ and ‘Changchun Mici’e0
- Treatment
- foliar application of HBLe0
- Outcome
- shoot and root fresh and dry weighte0
- Direction
- enhancede0
- Qualifier
- 60 and 120 mmol L−1 NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“The foliar application of HBL enhanced shoot and root fresh and dry weight and chlorophyll content at 60 and 120 mmol L−1 NaCl stress in ‘Jinyou 1’ and ‘Changchun Mici’, respectively.”
Claim · model-written summary
HBL increased chlorophyll content in the tested cucumber cultivars under NaCl stress.
- Taxon
- Cucumber (Cucumis sativus L.)Cucumis sativust0
- Material
- ‘Jinyou 1’ and ‘Changchun Mici’e0
- Treatment
- foliar application of HBLe0
- Outcome
- chlorophyll contente0
- Direction
- enhancede0
- Qualifier
- 60 and 120 mmol L−1 NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“The foliar application of HBL enhanced shoot and root fresh and dry weight and chlorophyll content at 60 and 120 mmol L−1 NaCl stress in ‘Jinyou 1’ and ‘Changchun Mici’, respectively.”
Claim · model-written summary
Homobrassinolide increased super oxide dismutase and peroxidase levels in both cucumber cultivars under salt stress.
- Taxon
- Cucumber (Cucumis sativus L.)Cucumis sativust0
- Treatment
- Homobrassinolide applicatione0
- Outcome
- super oxide dismutase and peroxidase levelse0
- Direction
- increasinge0
- Qualifier
- 60 and 120 mmol L−1 stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“Homobrassinolide application also altered the antioxidant enzyme levels by increasing super oxide dismutase and peroxidase levels and decreased malondialdehyde content under 60 and 120 mmol L−1 stress in both plant cultivars.”
Claim · model-written summary
Homobrassinolide decreased malondialdehyde content in both cucumber cultivars under salt stress.
- Taxon
- Cucumber (Cucumis sativus L.)Cucumis sativust0
- Treatment
- Homobrassinolide applicatione0
- Outcome
- malondialdehyde contente0
- Direction
- decreasede0
- Qualifier
- 60 and 120 mmol L−1 stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber (Cucumis sativus L.)”
e0“Homobrassinolide application also altered the antioxidant enzyme levels by increasing super oxide dismutase and peroxidase levels and decreased malondialdehyde content under 60 and 120 mmol L−1 stress in both plant cultivars.”
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