Abstract
Drought stress influence seed germination and seedling growth of many plants. Seed priming could be used to alleviate the depressive effects of drought stress. The improving effects are influenced by many factors including priming methods, plant species and drought intensity. The mechanisms of drought tolerance induced by seed priming have not been clearly elucidated. The study was carried out to assess whether drought tolerance could be enhanced by seed priming at the germination stage and characterize the potential physiological and biochemical alternation of drought tolerance in Chinese cabbage. The seeds were soaked at 20 °C for 8 h in distilled water, 200 mmol/l potassium nitrate (KNO3), 200 mmol/l urea, respectively. Both primed and unprimed seeds germinated under six levels of drought stress (0, − 1.0, − 2.0, − 3.0, − 4.0 and − 5.0 MPa osmotic potential) induced by PEG 6000. Results indicated that germination traits (germination percentage, potential and seedling vigor index) of Chinese cabbage all decreased gradually with increasing drought intensity. Three seed priming types including water, KNO3 and urea all increased germination traits at all levels of drought stress as compared to the unprimed seed. The enhanced drought tolerance conferred by seed priming treatments is associated with the modulating peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) activities and levels of soluble sugar and proline. The results suggested that priming could serve as an appropriate treatment to increase the germination and early seedling growth of Chinese cabbage under drought stress conditions.
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Claims 6
Claim · model-written summary
Germination percentage, potential and seedling vigor index decreased as drought intensity increased.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensise0 - Treatment
- increasing drought intensitye0
- Outcome
- germination traits (germination percentage, potential and seedling vigor index)e0
- Direction
- decreased graduallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination traits (germination percentage, potential and seedling vigor index) of Chinese cabbage all decreased gradually with increasing drought intensity”
Claim · model-written summary
water seed priming increased germination traits under drought relative to unprimed seed.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- watere0
- Outcome
- germination traitse0
- Direction
- increasede0
- Qualifier
- all levels of drought stresse0
- Comparator
- unprimed seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three seed priming types including water, KNO3 and urea all increased germination traits at all levels of drought stress as compared to the unprimed seed”
t0“Chinese cabbage”
Claim · model-written summary
KNO3 seed priming increased germination traits under drought relative to unprimed seed.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- KNO3e0
- Outcome
- germination traitse0
- Direction
- increasede0
- Qualifier
- all levels of drought stresse0
- Comparator
- unprimed seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three seed priming types including water, KNO3 and urea all increased germination traits at all levels of drought stress as compared to the unprimed seed”
t0“Chinese cabbage”
Claim · model-written summary
urea seed priming increased germination traits under drought relative to unprimed seed.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- ureae0
- Outcome
- germination traitse0
- Direction
- increasede0
- Qualifier
- all levels of drought stresse0
- Comparator
- unprimed seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three seed priming types including water, KNO3 and urea all increased germination traits at all levels of drought stress as compared to the unprimed seed”
t0“Chinese cabbage”
Claim · model-written summary
The enhanced drought tolerance under seed priming was associated with altered antioxidant enzyme activities and soluble sugar and proline levels.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- seed priming treatmentse0
- Gene
- peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT)e0
- Compound
- soluble sugar and prolinee0
- Outcome
- enhanced drought tolerancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced drought tolerance conferred by seed priming treatments is associated with the modulating peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) activities and levels of soluble sugar and proline”
t0“Chinese cabbage”
Claim · model-written summary
The authors recommended priming to improve Chinese cabbage germination and early seedling growth under drought.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensise0
- Outcome
- priming could serve as an appropriate treatmente0
- Qualifier
- under drought stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming could serve as an appropriate treatment to increase the germination and early seedling growth of Chinese cabbage under drought stress conditions”
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