Abstract
The effect of excess macronutrients in the root environment on mannitol and sucrose metabolism was investigated in celery (Apium graveolens L. var dulce [Mill.] Pers.). Plant growth was inhibited progressively as macronutrient concentration in the media, as measured by electrical conductivity (E.C.), increased from 1.0 to 11.9 decisiemens m-1. Plants grown for 35 d at higher E.C. had a lower water content but similar dry weight in their roots, leaves, and petioles compared to plants grown at lower E.C. Macronutrient concentrations of leaves, roots, and petioles were not affected by the imposed stress, indicating that the macronutrient stress resulted in a water-deficit stress response rather than a salt-specific response. Mannitol accumulated in sink tissues and was accompanied by a drastic decrease in activity of mannitol-1-oxidoreductase. Sucrose concentration and activities of sucrose-metabolizing enzymes in sink tissues were not affected by the macronutrient stress. Mature leaves exhibited increased concentrations of both mannitol and sucrose, together with increased activity of mannose-6-phosphate reductase and sucrose phosphate synthase, in response to macronutrient stress. Thus, mannitol accumulation in osmotically stressed celery is regulated by diminished catabolism in sink tissues and increased capacity for mannitol biosynthesis in source leaves.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Increasing medium macronutrient concentration progressively inhibited celery growth.
- Taxon
- Celery
%2C_Elswick%2C_Northumberland_4.jpg?width=60)
Apium graveolens Dulce Groupt0 - Treatment
- macronutrient concentration in the mediae0
- Outcome
- Plant growthe0
- Direction
- inhibited progressivelye0
- Value
- 1.0 to 11.9 decisiemens m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Elswick%2C_Northumberland_4.jpg?width=500)
Verbatim
e0“Plant growth was inhibited progressively as macronutrient concentration in the media, as measured by electrical conductivity (E.C.), increased from 1.0 to 11.9 decisiemens m-1.”
t0“Celery”
Claim · model-written summary
Higher electrical conductivity lowered water content in celery roots, leaves, and petioles.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- roots, leaves, and petiolese0
- Treatment
- higher E.C.e0
- Outcome
- water contente0
- Direction
- lowere0
- Comparator
- lower E.C.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown for 35 d at higher E.C. had a lower water content but similar dry weight in their roots, leaves, and petioles compared to plants grown at lower E.C.”
t0“Celery”
Claim · model-written summary
Higher electrical conductivity left dry weight similar in celery roots, leaves, and petioles.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- roots, leaves, and petiolese0
- Treatment
- higher E.C.e0
- Outcome
- dry weighte0
- Direction
- similare0
- Comparator
- lower E.C.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown for 35 d at higher E.C. had a lower water content but similar dry weight in their roots, leaves, and petioles compared to plants grown at lower E.C.”
t0“Celery”
Claim · model-written summary
Macronutrient stress did not change macronutrient concentrations in celery leaves, roots, and petioles.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- leaves, roots, and petiolese0
- Treatment
- imposed stresse0
- Outcome
- Macronutrient concentrationse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Macronutrient concentrations of leaves, roots, and petioles were not affected by the imposed stress”
t0“Celery”
Claim · model-written summary
Mannitol accumulated in celery sink tissues under stress.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- sink tissuese0
- Outcome
- Mannitol accumulatede0
- Direction
- accumulatede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mannitol accumulated in sink tissues and was accompanied by a drastic decrease in activity of mannitol-1-oxidoreductase.”
t0“Celery”
Claim · model-written summary
Mannitol-1-oxidoreductase activity drastically decreased in celery sink tissues.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- sink tissuese0
- Gene
- mannitol-1-oxidoreductasee0
- Outcome
- activity of mannitol-1-oxidoreductasee0
- Direction
- drastic decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mannitol accumulated in sink tissues and was accompanied by a drastic decrease in activity of mannitol-1-oxidoreductase.”
t0“Celery”
Claim · model-written summary
Sucrose concentration in celery sink tissues was unaffected by macronutrient stress.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- sink tissuese0
- Treatment
- macronutrient stresse0
- Outcome
- Sucrose concentratione0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose concentration and activities of sucrose-metabolizing enzymes in sink tissues were not affected by the macronutrient stress.”
t0“Celery”
Claim · model-written summary
Activities of sucrose-metabolizing enzymes in celery sink tissues were unaffected by macronutrient stress.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- sink tissuese0
- Treatment
- macronutrient stresse0
- Outcome
- activities of sucrose-metabolizing enzymese0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose concentration and activities of sucrose-metabolizing enzymes in sink tissues were not affected by the macronutrient stress.”
t0“Celery”
Claim · model-written summary
Mannitol concentration increased in mature celery leaves under macronutrient stress.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- Mature leavese0
- Treatment
- macronutrient stresse0
- Outcome
- concentrations of both mannitol and sucrosee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mature leaves exhibited increased concentrations of both mannitol and sucrose, together with increased activity of mannose-6-phosphate reductase and sucrose phosphate synthase, in response to macronutrient stress.”
t0“Celery”
Claim · model-written summary
Mannose-6-phosphate reductase and sucrose phosphate synthase activity increased in mature celery leaves under macronutrient stress.
- Taxon
- CeleryApium graveolens Dulce Groupt0
- Organ / stage
- Mature leavese0
- Treatment
- macronutrient stresse0
- Outcome
- activity of mannose-6-phosphate reductase and sucrose phosphate synthasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mature leaves exhibited increased concentrations of both mannitol and sucrose, together with increased activity of mannose-6-phosphate reductase and sucrose phosphate synthase, in response to macronutrient stress.”
t0“Celery”
Claim · model-written summary
Authors attributed stressed celery mannitol accumulation to lower sink catabolism and greater source leaf biosynthetic capacity.
- Taxon
- celeryApium graveolens Dulce Groupe0
- Outcome
- mannitol accumulatione0
- Qualifier
- diminished catabolism in sink tissues and increased capacity for mannitol biosynthesis in source leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mannitol accumulation in osmotically stressed celery is regulated by diminished catabolism in sink tissues and increased capacity for mannitol biosynthesis in source leaves”
The same questions in other papers
in vitro · growth · Apium graveolensPositive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.