Abstract
Drought is a significant environmental stressor that induces changes in the physiological, morphological, biochemical, and molecular traits of plants, ultimately resulting in reduced plant growth and crop productivity. Seaweed extracts are thought to be effective in mitigating the effects of drought stress on plants. In this study, we investigated the impact of crude extract (CE), and polysaccharides (PS) derived from the brown macroalgae Fucus spiralis (Heterokontophyta, Phaeophyceae) applied at 5% (v/v) and 0.1% (w/v) respectively on radish plants Raphanus sativus L. subjected to varying levels of drought stress, specifically 80% of field capacity (FC) for no stress, 60% FC for moderate stress, and 40% FC for severe stress. Our examination of growth parameters, along with physiological and biochemical characteristics, revealed that both CE and PS increased the fresh weight over the control by 47.43% and 64% at 40% FC and 12.5% and 38% at 60% FC respectively. Under stress (40% FC), the application of CE and PS decreased proline content of radish leaves by 23.45% and 6.46% respectively in comparison with the control. Furthermore, PS treatment caused an increase of the alkaline phosphatase and urease activity in the soil by 182.5% and 34.6% respectively. CE and PS treatments led to decreased sugar content and total phenolics levels. Notably, lipid peroxidation was reduced in stressed plants treated with both CE and PS, with PS treatment yielding lower concentrations (3.75 nmol MDA.g − 1 FW at 40% FC). Overall, F. spiralis extracts interacted through several mechanisms using various compounds to mitigate the negative effects of drought stress on radish plants. These results demonstrate that seaweed extracts could be adopted in integrated production systems to boost food productivity under harsh climatic conditions.
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Claims 13
Claim · model-written summary
Crude extract raised fresh weight 47.43% at 40% FC.
- Taxon
- radish plants
Raphanus sativuse1 - Treatment
- CEe0
- Outcome
- fresh weighte0
- Direction
- increasede0
- Value
- 47.43%e0
- Qualifier
- 40% FCe0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both CE and PS increased the fresh weight over the control by 47.43% and 64% at 40% FC”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Polysaccharides raised fresh weight 64% at 40% FC.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- PSe0
- Outcome
- fresh weighte0
- Direction
- increasede0
- Value
- 64%e0
- Qualifier
- 40% FCe0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both CE and PS increased the fresh weight over the control by 47.43% and 64% at 40% FC”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Crude extract raised fresh weight 12.5% at 60% FC.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- CEe2
- Outcome
- fresh weighte2
- Direction
- increasede2
- Value
- 12.5%e0
- Qualifier
- 60% FCe0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“12.5% and 38% at 60% FC respectively”
e1“radish plants Raphanus sativus L.”
e2“both CE and PS increased the fresh weight over the control by 47.43% and 64% at 40% FC and 12.5% and 38% at 60% FC respectively”
Claim · model-written summary
Polysaccharides raised fresh weight 38% at 60% FC.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- PSe2
- Outcome
- fresh weighte2
- Direction
- increasede2
- Value
- 38%e0
- Qualifier
- 60% FCe0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“12.5% and 38% at 60% FC respectively”
e1“radish plants Raphanus sativus L.”
e2“both CE and PS increased the fresh weight over the control by 47.43% and 64% at 40% FC and 12.5% and 38% at 60% FC respectively”
Claim · model-written summary
Crude extract reduced radish leaf proline content 23.45% at 40% FC.
- Taxon
- radishRaphanus sativuse0
- Treatment
- CEe0
- Outcome
- proline content of radish leavese0
- Direction
- decreasede0
- Value
- 23.45%e0
- Qualifier
- 40% FCe1
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of CE and PS decreased proline content of radish leaves by 23.45% and 6.46% respectively in comparison with the control”
e1“Under stress (40% FC)”
Claim · model-written summary
Polysaccharides reduced radish leaf proline content 6.46% at 40% FC.
- Taxon
- radishRaphanus sativuse0
- Treatment
- PSe0
- Outcome
- proline content of radish leavese0
- Direction
- decreasede0
- Value
- 6.46%e0
- Qualifier
- 40% FCe1
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of CE and PS decreased proline content of radish leaves by 23.45% and 6.46% respectively in comparison with the control”
e1“Under stress (40% FC)”
Claim · model-written summary
Polysaccharides increased soil alkaline phosphatase activity 182.5%.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- PS treatmente0
- Outcome
- alkaline phosphatasee0
- Direction
- increasee0
- Value
- 182.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PS treatment caused an increase of the alkaline phosphatase and urease activity in the soil by 182.5% and 34.6% respectively”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Polysaccharides increased soil urease activity 34.6%.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- PS treatmente0
- Outcome
- urease activity in the soile0
- Direction
- increasee0
- Value
- 34.6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PS treatment caused an increase of the alkaline phosphatase and urease activity in the soil by 182.5% and 34.6% respectively”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Crude extract decreased sugar content and total phenolics.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- CEe0
- Outcome
- sugar content and total phenolics levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CE and PS treatments led to decreased sugar content and total phenolics levels”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Polysaccharides decreased sugar content and total phenolics.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- PSe0
- Outcome
- sugar content and total phenolics levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CE and PS treatments led to decreased sugar content and total phenolics levels”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Crude extract reduced lipid peroxidation in stressed plants.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- CEe0
- Outcome
- lipid peroxidatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lipid peroxidation was reduced in stressed plants treated with both CE and PS”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
Polysaccharides reduced lipid peroxidation, with 3.75 nmol MDA.g − 1 FW at 40% FC.
- Taxon
- radish plantsRaphanus sativuse1
- Treatment
- PS treatmente0
- Outcome
- lipid peroxidatione0
- Direction
- lowere0
- Value
- 3.75 nmol MDA.g − 1 FWe0
- Qualifier
- 40% FCe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lipid peroxidation was reduced in stressed plants treated with both CE and PS, with PS treatment yielding lower concentrations (3.75 nmol MDA.g − 1 FW at 40% FC)”
e1“radish plants Raphanus sativus L.”
Claim · model-written summary
The authors suggested adopting seaweed extracts to boost production under harsh climatic conditions.
- Taxon
- radish plantsRaphanus sativuse1
- Outcome
- adopted in integrated production systems to boost food productivitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seaweed extracts could be adopted in integrated production systems to boost food productivity under harsh climatic conditions”
e1“radish plants Raphanus sativus L.”
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