Abstract
Treatment of potato plants grown in nutrient solution with 3.8 μM ABA resulted in reduced soluble protein in roots and in leaves at 24 h, but not in stems. This treatment reduced in vivo nitrate reductase activity in all organs for about 48 h with the most pronounced reduction occurring in the roots. Excised root and leaf segments from plants treated with ABA for 24, 48 and 72 h absorbed significantly more 14C leucine, compared to the control but the percent incorporation into protein was not altered in roots. In response to ABA total free amino nitrogen in leaves was lower at 5 and 72 h and in stems at 72 h. Amino nitrogen content of roots was enhanced by ABA at 5, 24 and 72 h due to generally higher levels of aspartate, serine, glutamate, proline and ammonia. There was no consistent relationship between ABA suppression of nitrate reductase activity and ammonia or specific amino acid (except proline) levels in leaves and stems. The increased free amino nitrogen levels in response to the hormone may be the result of impaired NO3− reduction rather than the cause. The results of protein synthesis studies and soluble protein content suggest that ABA inhibition of nitrate reductase is not due to general inhibition of protein synthesis and may involve specific inhibition of nitrate reductase protein synthesis.
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Claims 11
Claim · model-written summary
ABA reduced soluble protein in potato roots and leaves at 24 hours.
- Taxon
- potato plants
Solanum tuberosume0 - Organ / stage
- roots and in leavese0
- Treatment
- 3.8 μM ABAe0
- Outcome
- soluble proteine0
- Direction
- reducede0
- Qualifier
- 24 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of potato plants grown in nutrient solution with 3.8 μM ABA resulted in reduced soluble protein in roots and in leaves at 24 h, but not in stems.”
Claim · model-written summary
ABA did not reduce soluble protein in stems at 24 hours.
- Taxon
- potato plantsSolanum tuberosume0
- Organ / stage
- stemse0
- Treatment
- 3.8 μM ABAe0
- Outcome
- soluble proteine0
- Direction
- note0
- Qualifier
- 24 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of potato plants grown in nutrient solution with 3.8 μM ABA resulted in reduced soluble protein in roots and in leaves at 24 h, but not in stems.”
Claim · model-written summary
ABA reduced nitrate reductase activity in all organs for about 48 hours, most strongly in roots.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- all organse0
- Treatment
- This treatmente0
- Gene
- nitrate reductasee0
- Outcome
- in vivo nitrate reductase activitye0
- Direction
- reducede0
- Qualifier
- about 48 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment reduced in vivo nitrate reductase activity in all organs for about 48 h with the most pronounced reduction occurring in the roots.”
t0“Potato”
Claim · model-written summary
Segments from ABA-treated potato plants absorbed significantly more 14C leucine than controls.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- root and leaf segmentse0
- Treatment
- treated with ABAe0
- Outcome
- absorbed significantly more 14C leucinee0
- Direction
- moree0
- Qualifier
- 24, 48 and 72 he0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised root and leaf segments from plants treated with ABA for 24, 48 and 72 h absorbed significantly more 14C leucine, compared to the control but the percent incorporation into protein was not altered in roots.”
t0“Potato”
Claim · model-written summary
ABA did not alter the percentage of leucine incorporated into root protein.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- rootse0
- Treatment
- treated with ABAe0
- Outcome
- percent incorporation into proteine0
- Direction
- not alterede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised root and leaf segments from plants treated with ABA for 24, 48 and 72 h absorbed significantly more 14C leucine, compared to the control but the percent incorporation into protein was not altered in roots.”
t0“Potato”
Claim · model-written summary
ABA lowered free amino nitrogen in leaves at 5 and 72 hours and stems at 72 hours.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- leavese0
- Treatment
- ABAe0
- Outcome
- total free amino nitrogene0
- Direction
- lowere0
- Qualifier
- 5 and 72 h and in stems at 72 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to ABA total free amino nitrogen in leaves was lower at 5 and 72 h and in stems at 72 h.”
t0“Potato”
Claim · model-written summary
ABA increased amino nitrogen content in roots at 5, 24 and 72 hours.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- rootse0
- Treatment
- ABAe0
- Outcome
- Amino nitrogen content of rootse0
- Direction
- enhancede0
- Qualifier
- 5, 24 and 72 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amino nitrogen content of roots was enhanced by ABA at 5, 24 and 72 h due to generally higher levels of aspartate, serine, glutamate, proline and ammonia.”
t0“Potato”
Claim · model-written summary
ABA-treated roots had generally higher aspartate, serine, glutamate, proline and ammonia levels.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- rootse0
- Treatment
- ABAe0
- Outcome
- levels of aspartate, serine, glutamate, proline and ammoniae0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amino nitrogen content of roots was enhanced by ABA at 5, 24 and 72 h due to generally higher levels of aspartate, serine, glutamate, proline and ammonia.”
t0“Potato”
Claim · model-written summary
Nitrate reductase suppression had no consistent relationship with ammonia or most amino acids in leaves and stems.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- leaves and stemse0
- Gene
- nitrate reductasee0
- Outcome
- ammonia or specific amino acid (except proline) levelse0
- Direction
- no consistent relationshipe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no consistent relationship between ABA suppression of nitrate reductase activity and ammonia or specific amino acid (except proline) levels in leaves and stems.”
t0“Potato”
Claim · model-written summary
The authors suggest impaired nitrate reduction may explain increased free amino nitrogen after ABA treatment.
- Taxon
- PotatoSolanum tuberosumt0
- Outcome
- increased free amino nitrogen levelse0
- Direction
- increasede0
- Qualifier
- impaired NO3− reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased free amino nitrogen levels in response to the hormone may be the result of impaired NO3− reduction rather than the cause.”
t0“Potato”
Claim · model-written summary
The authors infer that ABA inhibition of nitrate reductase may involve specific suppression of its protein synthesis.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- ABAe0
- Gene
- nitrate reductasee0
- Outcome
- ABA inhibition of nitrate reductasee0
- Qualifier
- specific inhibition of nitrate reductase protein synthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results of protein synthesis studies and soluble protein content suggest that ABA inhibition of nitrate reductase is not due to general inhibition of protein synthesis and may involve specific inhibition of nitrate reductase protein synthesis.”
t0“Potato”
The same questions in other papers
(+)-abscisic acid · quality: protein · Solanum tuberosum (potato)Positive and negative results
2 in the opposite direction
- positive
- positive
(+)-abscisic acid · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
3 in the opposite direction
- positive
- 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.