Abstract
Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress, which is a prevalent factor influencing its growth seriously. To explore the effect of ascorbic acid (AsA) on hemp seedlings under drought condition, a pot experiment was carried out to applicate AsA on two cultivars, ‘Yunma1’ (YM) and ‘Bamahuoma’ (BM). Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA). The results showed that drought stress significantly suppressed plant height and reduced plant fresh weight, with reductions of 59% and 75% observed in YM, and 43% and 67% in BM, respectively. Although foliar treatment with AsA had little effect on increasing plant fresh weight under drought conditions, it significantly enhanced the concentrations of photosynthetic pigments and the activities of antioxidant enzyme (superoxide dismutase, SOD and peroxidase, POD). The results suggested that harmful effects of drought stress on hemp seedlings were mitigated by exogenous application of AsA, which decrease the breakdown of photosynthetic pigments, enhancing antioxidant enzyme activities and strengthening the antioxidative defense system. Among these, compared to drought treatment the carotene content and SOD activity exhibited the most significant increases after AsA spraying. Specifically, exogenous AsA treatment increased the carotene content by approximately 108.40% in YM and 88.53% in BM. Meanwhile, POD activity increased by 33.33% in YM and 60.94% in BM. Furthermore, the study found that hemp plant response and tolerance to drought were cultivar-dependent. Overall, these results provide a theoretical basis for understanding the mechanism by which AsA alleviates drought stress.
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Claims 12
Claim · model-written summary
Drought reduced plant height of the cultivar Yunma1 by 59%.
- Taxon
- Cannabis sativa
Cannabis sativae0 - Material
- Yunma1e2
- Treatment
- drought (50% substrate moisture)e3
- Outcome
- plant heighte1
- Direction
- suppressede1
- Value
- 59%e1
- Comparator
- control (normal water)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e1“drought stress significantly suppressed plant height and reduced plant fresh weight, with reductions of 59% and 75% observed in YM, and 43% and 67% in BM, respectively”
e2“two cultivars, ‘Yunma1’ (YM) and ‘Bamahuoma’ (BM)”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
Claim · model-written summary
Drought reduced plant fresh weight of the cultivar Yunma1 by 75%.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- Yunma1e2
- Treatment
- drought (50% substrate moisture)e3
- Outcome
- plant fresh weighte1
- Direction
- reducede1
- Value
- 75%e1
- Comparator
- control (normal water)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e1“drought stress significantly suppressed plant height and reduced plant fresh weight, with reductions of 59% and 75% observed in YM, and 43% and 67% in BM, respectively”
e2“two cultivars, ‘Yunma1’ (YM) and ‘Bamahuoma’ (BM)”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
Claim · model-written summary
Drought reduced plant height of the cultivar Bamahuoma by 43%.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- Bamahuomae2
- Treatment
- drought (50% substrate moisture)e3
- Outcome
- plant heighte1
- Direction
- suppressede1
- Value
- 43%e1
- Comparator
- control (normal water)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e1“drought stress significantly suppressed plant height and reduced plant fresh weight, with reductions of 59% and 75% observed in YM, and 43% and 67% in BM, respectively”
e2“two cultivars, ‘Yunma1’ (YM) and ‘Bamahuoma’ (BM)”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
Claim · model-written summary
Drought reduced plant fresh weight of the cultivar Bamahuoma by 67%.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- Bamahuomae2
- Treatment
- drought (50% substrate moisture)e3
- Outcome
- plant fresh weighte1
- Direction
- reducede1
- Value
- 67%e1
- Comparator
- control (normal water)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e1“drought stress significantly suppressed plant height and reduced plant fresh weight, with reductions of 59% and 75% observed in YM, and 43% and 67% in BM, respectively”
e2“two cultivars, ‘Yunma1’ (YM) and ‘Bamahuoma’ (BM)”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
Claim · model-written summary
Foliar ascorbic acid significantly enhanced photosynthetic pigment concentrations under drought.
- Taxon
- Cannabis sativaCannabis sativae0
- Treatment
- drought + AsA (50% substrate moisture + 200 mg/L AsA)e3
- Outcome
- concentrations of photosynthetic pigmentse4
- Direction
- significantly enhancede4
- Comparator
- drought (50% substrate moisture)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
e4“it significantly enhanced the concentrations of photosynthetic pigments and the activities of antioxidant enzyme (superoxide dismutase, SOD and peroxidase, POD)”
Claim · model-written summary
Foliar ascorbic acid significantly enhanced antioxidant enzyme activities under drought.
- Taxon
- Cannabis sativaCannabis sativae0
- Treatment
- drought + AsA (50% substrate moisture + 200 mg/L AsA)e3
- Outcome
- activities of antioxidant enzymee4
- Direction
- significantly enhancede4
- Comparator
- drought (50% substrate moisture)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
e4“it significantly enhanced the concentrations of photosynthetic pigments and the activities of antioxidant enzyme (superoxide dismutase, SOD and peroxidase, POD)”
Claim · model-written summary
Exogenous AsA increased carotene content by approximately 108.40% in Yunma1.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- YMe6
- Treatment
- exogenous AsA treatmente6
- Outcome
- carotene contente6
- Direction
- increasede6
- Value
- approximately 108.40%e6
- Comparator
- drought (50% substrate moisture)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
e6“exogenous AsA treatment increased the carotene content by approximately 108.40% in YM and 88.53% in BM”
Claim · model-written summary
Exogenous AsA increased carotene content by 88.53% in Bamahuoma.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- BMe6
- Treatment
- exogenous AsA treatmente6
- Outcome
- carotene contente6
- Direction
- increasede6
- Value
- 88.53%e6
- Comparator
- drought (50% substrate moisture)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
e6“exogenous AsA treatment increased the carotene content by approximately 108.40% in YM and 88.53% in BM”
Claim · model-written summary
Exogenous AsA increased POD activity by 33.33% in Yunma1.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- YMe7
- Treatment
- exogenous AsA treatmente6
- Outcome
- POD activitye7
- Direction
- increasede7
- Value
- 33.33%e7
- Comparator
- drought (50% substrate moisture)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
e6“exogenous AsA treatment increased the carotene content by approximately 108.40% in YM and 88.53% in BM”
e7“POD activity increased by 33.33% in YM and 60.94% in BM”
Claim · model-written summary
Exogenous AsA increased POD activity by 60.94% in Bamahuoma.
- Taxon
- Cannabis sativaCannabis sativae0
- Material
- BMe7
- Treatment
- exogenous AsA treatmente6
- Outcome
- POD activitye7
- Direction
- increasede7
- Value
- 60.94%e7
- Comparator
- drought (50% substrate moisture)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e3“Three drought treatments were imposed: control (normal water), drought (50% substrate moisture) and drought + AsA (50% substrate moisture + 200 mg/L AsA)”
e6“exogenous AsA treatment increased the carotene content by approximately 108.40% in YM and 88.53% in BM”
e7“POD activity increased by 33.33% in YM and 60.94% in BM”
Claim · model-written summary
AsA spraying gave the most significant increases in carotene content and SOD activity compared with drought.
- Taxon
- Cannabis sativaCannabis sativae0
- Treatment
- AsA sprayinge5
- Outcome
- carotene content and SOD activitye5
- Direction
- most significant increasese5
- Comparator
- drought treatmente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e5“compared to drought treatment the carotene content and SOD activity exhibited the most significant increases after AsA spraying”
Claim · model-written summary
Hemp response and tolerance to drought depended on cultivar.
- Taxon
- Cannabis sativaCannabis sativae0
- Outcome
- response and tolerance to droughte7
- Qualifier
- cultivar-dependente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Industrial hemp (Cannabis sativa L.) seedlings are sensitive to drought stress”
e7“the study found that hemp plant response and tolerance to drought were cultivar-dependent”
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