Abstract
In the context of increasing global climate change, drought stress greatly affects the growth, yield and quality of medicinal plants. In this study, we analyzed the impact of drought stress on Scutellaria baicalensis Georgi (known as “Huang Qin”) during critical growth stages, emphasizing the necessity for rational irrigation strategies in cultivation amidst global climate change. We conducted a pot experiment with well-watered (CK), leaf-extension stage (LES) drought stress (T1), and seed-ripening stage (SRS) drought stress (T2) treatments. We assessed root morphology, physiology, and active constituent contents at each stage and harvest. The results revealed significant reductions in root dry weight and active constituent yields under drought stress, particularly during the SRS. Compared with that in CK, the root dry weight significantly decreased by 48.87 % and 21.22 % during the LES and SRS, respectively, with SRS stress exhibiting a decrease of 11.43 % compared to LES stress at harvest. Moreover, active constituents like baicalin, baicalein, wogonoside, and wogonin also experienced significant yield reductions in T1 and even more in T2. Factor analysis revealed that both root dry weight, positively influenced by main root diameter, root surface area, and root volume (accounting for 64.74 % of total variance), along with active constituent content played a crucial role in determined the active constituent yields, with root dry weight being the major contributor. Therefore, this study underscores the importance of optimizing irrigation strategies in the cultivation of S. baicalensis . Ensuring water supply to mitigate severe drought (40 %FC drought stress), particularly during the later growth stage, is crucial for achieving high-yield and high-quality of S. baicalensis . • Both LES and SRS drought stress significantly reduced root dry weight and active constituent yield in S. baicalensis , with SRS drought stress causing increased yield losses. • Drought stress inhibited morphology, main root diameter, root surface area, and root volume, directly determining S. baicalensis root dry weight. • Root dry weight and active constituent contents impacted active constituent yield in S. baicalensis , with root dry weight being pivotal. Enhancing the yield is the primary objective of S. baicalensis cultivation. • EL and PAL activities were the primary physiological mechanisms affecting the active constituent contents of S. baicalensis . • Optimizing irrigation is crucial for drought mitigation and S. baicalensis yield.
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Claims 9
Claim · model-written summary
Leaf-extension drought reduced root dry weight by 48.87 % relative to CK.
- Taxon
- Scutellaria baicalensis Georgi
Scutellaria baicalensist0 - Treatment
- LESe0
- Outcome
- root dry weighte0
- Direction
- decreasede0
- Value
- 48.87 %e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with that in CK, the root dry weight significantly decreased by 48.87 % and 21.22 % during the LES and SRS, respectively”
t0“Scutellaria baicalensis Georgi”
Claim · model-written summary
Seed-ripening drought reduced root dry weight by 21.22 % relative to CK.
- Taxon
- Scutellaria baicalensis GeorgiScutellaria baicalensist0
- Treatment
- SRSe0
- Outcome
- root dry weighte0
- Direction
- decreasede0
- Value
- 21.22 %e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with that in CK, the root dry weight significantly decreased by 48.87 % and 21.22 % during the LES and SRS, respectively”
t0“Scutellaria baicalensis Georgi”
Claim · model-written summary
SRS stress decreased harvest root dry weight by 11.43 % compared with LES stress.
- Taxon
- Scutellaria baicalensis GeorgiScutellaria baicalensist0
- Treatment
- SRS stresse0
- Outcome
- root dry weighte1
- Direction
- decreasee0
- Value
- 11.43 %e0
- Comparator
- LES stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SRS stress exhibiting a decrease of 11.43 % compared to LES stress at harvest”
t0“Scutellaria baicalensis Georgi”
e1“Compared with that in CK, the root dry weight significantly decreased”
Claim · model-written summary
Drought significantly reduced yields of baicalin, baicalein and wogonoside.
- Taxon
- Scutellaria baicalensis GeorgiScutellaria baicalensist0
- Treatment
- T1e0
- Outcome
- baicalin, baicalein, wogonosidee0
- Direction
- reductionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“active constituents like baicalin, baicalein, wogonoside, and wogonin also experienced significant yield reductions in T1 and even more in T2”
t0“Scutellaria baicalensis Georgi”
Claim · model-written summary
Drought significantly reduced wogonin yield.
- Taxon
- Scutellaria baicalensis GeorgiScutellaria baicalensist0
- Treatment
- T2e0
- Outcome
- wogonine0
- Direction
- reductionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“active constituents like baicalin, baicalein, wogonoside, and wogonin also experienced significant yield reductions in T1 and even more in T2”
t0“Scutellaria baicalensis Georgi”
Claim · model-written summary
Main root diameter, surface area and volume positively influenced root dry weight and explained 64.74 % of variance.
- Taxon
- Scutellaria baicalensis GeorgiScutellaria baicalensist0
- Organ / stage
- main roote0
- Outcome
- root dry weighte0
- Direction
- positively influencede0
- Value
- 64.74 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root dry weight, positively influenced by main root diameter, root surface area, and root volume (accounting for 64.74 % of total variance)”
t0“Scutellaria baicalensis Georgi”
Claim · model-written summary
Root dry weight was the major contributor to active constituent yield.
- Taxon
- Scutellaria baicalensis GeorgiScutellaria baicalensist0
- Organ / stage
- roote0
- Outcome
- active constituent yieldse0
- Direction
- major contributore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“active constituent content played a crucial role in determined the active constituent yields, with root dry weight being the major contributor”
t0“Scutellaria baicalensis Georgi”
Claim · model-written summary
EL and PAL activities were described as primary mechanisms affecting active constituent contents.
- Taxon
- S. baicalensisScutellaria baicalensise0
- Gene
- EL and PALe0
- Outcome
- active constituent contentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EL and PAL activities were the primary physiological mechanisms affecting the active constituent contents of S. baicalensis”
Claim · model-written summary
Water supply during later growth is recommended to mitigate severe drought.
- Taxon
- S. baicalensisScutellaria baicalensise0
- Outcome
- Ensuring water supplye0
- Qualifier
- later growth stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ensuring water supply to mitigate severe drought (40 %FC drought stress), particularly during the later growth stage, is crucial for achieving high-yield and high-quality of S. baicalensis”