Abstract
Response of tea plants to B deficiency was studied in hydroponic medium under environmentally controlled conditions. Plants height, number of leaves and dry matter production of shoot and root were significantly decreased by B deficiency. Concentration of chlorophyll, carotenoids, anthocyanins and flavonoids was not affected by B deficiency in the young leaf, while a significant reduction of Chl a/b ratio and increase of carotenoids concentration was detected in the old leaf. Among leaf chlorophyll fluorescence parameters, only non-photochemical quenching (qN) increased in parallel to increase of carotenoids in the old leaves of B-deficient plants. Net assimilation (A) and transpiration (E) rate and stomatal conductance (gs) were decreased significantly under B deficiency conditions only in the young leaf. Activity of nitrate reductase increased in the young and decreased in the old leaf slightly, but was not influenced by B deficiency in the roots. Nitrate concentration diminished while nitrite concentration increased in the young leaf under B starvation. Data of antioxidant enzymes activity implied that ascorbate peroxidase was likely important for the protection of old leaf and peroxidase for roots, while superoxide dismutade contributed to the protection of all three organs against oxidative stress provoked by B deficiency conditions. H2O2 content of leaves and roots did not increase or even decreased under B deficiency conditions, that was associated with accumulation of proline. Our evidences suggest a protective role for proline against free radicals that may contribute significantly to the higher tolerance of tea plants to B deficiency.
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Claims 17
Claim · model-written summary
B deficiency significantly decreased height, leaf number, and shoot and root dry matter.
- Taxon
- teat0
- Treatment
- B deficiencye0
- Outcome
- Plants height, number of leaves and dry matter production of shoot and roote0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Plants height, number of leaves and dry matter production of shoot and root were significantly decreased by B deficiency.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Young leaf chlorophyll, carotenoid, anthocyanin and flavonoid concentrations were unaffected by B deficiency.
- Taxon
- teat0
- Organ / stage
- young leafe0
- Treatment
- B deficiencye0
- Outcome
- Concentration of chlorophyll, carotenoids, anthocyanins and flavonoidse0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“Concentration of chlorophyll, carotenoids, anthocyanins and flavonoids was not affected by B deficiency in the young leaf”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B deficiency significantly reduced old leaf chlorophyll a/b ratio.
Not reportedComparator
Verbatim
e0“a significant reduction of Chl a/b ratio and increase of carotenoids concentration was detected in the old leaf”
e1“B deficiency in the young leaf”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B deficiency increased old leaf carotenoid concentration.
- Taxon
- teat0
- Organ / stage
- old leafe0
- Treatment
- B deficiencye1
- Outcome
- carotenoids concentratione0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“increase of carotenoids concentration was detected in the old leaf”
e1“B deficiency in the young leaf”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Old leaf non-photochemical quenching increased alongside carotenoids under B deficiency.
Verbatim
e0“only non-photochemical quenching (qN) increased in parallel to increase of carotenoids in the old leaves of B-deficient plants”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B deficiency significantly reduced young leaf assimilation, transpiration and stomatal conductance.
- Taxon
- teat0
- Organ / stage
- young leafe0
- Treatment
- B deficiencye0
- Outcome
- Net assimilation (A) and transpiration (E) rate and stomatal conductance (gs)e0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Net assimilation (A) and transpiration (E) rate and stomatal conductance (gs) were decreased significantly under B deficiency conditions only in the young leaf.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B deficiency slightly increased young leaf nitrate reductase activity.
- Taxon
- teat0
- Organ / stage
- younge0
- Treatment
- B deficiencye0
- Outcome
- Activity of nitrate reductasee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Activity of nitrate reductase increased in the young and decreased in the old leaf slightly, but was not influenced by B deficiency in the roots.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B deficiency slightly decreased old leaf nitrate reductase activity.
- Taxon
- teat0
- Organ / stage
- old leafe0
- Treatment
- B deficiencye0
- Outcome
- Activity of nitrate reductasee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Activity of nitrate reductase increased in the young and decreased in the old leaf slightly, but was not influenced by B deficiency in the roots.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Root nitrate reductase activity was not influenced by B deficiency.
- Taxon
- teat0
- Organ / stage
- rootse0
- Treatment
- B deficiencye0
- Outcome
- Activity of nitrate reductasee0
- Direction
- not influencede0
Not reportedComparator
Verbatim
e0“Activity of nitrate reductase increased in the young and decreased in the old leaf slightly, but was not influenced by B deficiency in the roots.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B starvation diminished young leaf nitrate concentration.
- Taxon
- teat0
- Organ / stage
- young leafe0
- Treatment
- B starvatione0
- Outcome
- Nitrate concentratione0
- Direction
- diminishede0
Not reportedComparator
Verbatim
e0“Nitrate concentration diminished while nitrite concentration increased in the young leaf under B starvation.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
B starvation increased young leaf nitrite concentration.
- Taxon
- teat0
- Organ / stage
- young leafe0
- Treatment
- B starvatione0
- Outcome
- nitrite concentratione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Nitrate concentration diminished while nitrite concentration increased in the young leaf under B starvation.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Antioxidant enzyme data suggested ascorbate peroxidase protects old leaves.
Verbatim
e0“ascorbate peroxidase was likely important for the protection of old leaf”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Antioxidant enzyme data suggested peroxidase protects roots.
Verbatim
e0“peroxidase for roots”
e1“Data of antioxidant enzymes activity implied that ascorbate peroxidase was likely important for the protection of old leaf and peroxidase for roots”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Superoxide dismutade was interpreted as protecting all three organs from B deficiency oxidative stress.
Verbatim
e0“superoxide dismutade contributed to the protection of all three organs against oxidative stress provoked by B deficiency conditions”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Leaf and root H2O2 did not increase or decreased under B deficiency.
- Taxon
- teat0
- Treatment
- B deficiencye0
- Outcome
- H2O2 content of leaves and rootse0
- Direction
- did not increase or even decreasede0
Not reportedComparator
Verbatim
e0“H2O2 content of leaves and roots did not increase or even decreased under B deficiency conditions”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
Leaf and root H2O2 response was associated with proline accumulation.
Not reportedDirection
Verbatim
e0“H2O2 content of leaves and roots did not increase or even decreased under B deficiency conditions, that was associated with accumulation of proline.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
Claim · model-written summary
The authors suggested proline protects against free radicals and contributes to B deficiency tolerance.
Verbatim
e0“Our evidences suggest a protective role for proline against free radicals that may contribute significantly to the higher tolerance of tea plants to B deficiency.”
t0“tea (Camellia sinensis (L.) O. Kuntze)”
The same questions in other papers
boron atom · yield · Camellia sinensis (black tea)Results agree
2 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
boron atom · nutrient: content · Camellia sinensis (black tea)Results agree
2 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
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.