Abstract
Tea plants (Camellia sinensis) are naturally adapted to acidic soils, but excessive acidification poses serious threats to their growth and quality. This study aimed to identify the optimal pH for tea plant growth by examining morphological and antioxidant responses under different acid stress (pH 4.0–7.0) conditions. The results demonstrated that pH 4.5 most effectively promoted above- and below-ground part growth, root biomass, number of 2nd and 3rd lateral roots, root length, surface area, and average diameter, chlorophyll content, root activity, and antioxidant enzyme (superoxide dismutase and catalase) activities while minimizing oxidative damage (based on malondialdehyde levels). In contrast, stronger acidity (pH 4.0) or neutral conditions (pH 6.5 and 7.0) significantly inhibited tea growth and tested physiological functions. The findings highlight pH 4.5 as the optimal condition for tea cultivation and provide a scientific basis for managing soil acidity to enhance productivity and stress resilience in tea plants.
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Claims 6
Claim · model-written summary
pH 4.5 promoted above- and below-ground part growth and root biomass of tea plants compared with other acid stress levels.
Verbatim
e0“Tea plants (Camellia sinensis)”
e1“under different acid stress (pH 4.0–7.0) conditions. The results demonstrated that pH 4.5 most effectively promoted”
e2“above- and below-ground part growth, root biomass”
Claim · model-written summary
pH 4.5 promoted the number of 2nd and 3rd lateral roots, root length and surface area of tea plants compared with other acid stress levels.
Verbatim
e0“Tea plants (Camellia sinensis)”
e1“under different acid stress (pH 4.0–7.0) conditions. The results demonstrated that pH 4.5 most effectively promoted”
e3“number of 2nd and 3rd lateral roots, root length, surface area”
Claim · model-written summary
pH 4.5 promoted average root diameter, chlorophyll content and root activity of tea plants compared with other acid stress levels.
Verbatim
e0“Tea plants (Camellia sinensis)”
e1“under different acid stress (pH 4.0–7.0) conditions. The results demonstrated that pH 4.5 most effectively promoted”
e4“average diameter, chlorophyll content, root activity”
Claim · model-written summary
pH 4.5 promoted antioxidant enzyme (superoxide dismutase and catalase) activities of tea plants compared with other acid stress levels.
Verbatim
e0“Tea plants (Camellia sinensis)”
e1“under different acid stress (pH 4.0–7.0) conditions. The results demonstrated that pH 4.5 most effectively promoted”
e5“antioxidant enzyme (superoxide dismutase and catalase) activities”
Claim · model-written summary
pH 4.5 minimized oxidative damage (malondialdehyde levels) in tea plants compared with other acid stress levels.
Verbatim
e0“Tea plants (Camellia sinensis)”
e1“under different acid stress (pH 4.0–7.0) conditions. The results demonstrated that pH 4.5 most effectively promoted”
e6“minimizing oxidative damage (based on malondialdehyde levels)”
Claim · model-written summary
The authors recommend pH 4.5 as the optimal soil condition for tea cultivation.
Verbatim
e0“Tea plants (Camellia sinensis)”
e1“The findings highlight pH 4.5 as the optimal condition for tea cultivation”
The same questions in other papers
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.