Abstract
Salt accumulation in cultivated and cultivable rice ( Oryza sativa L.) and other croplands poses a serious threat to irrigated agriculture. Development of cultivars with high tolerance to salinity, and methodology to monitor and rapidly screen for salt tolerance may ameliorate the problem to a considerable extent. Because of the involvement of ethylene in growth responses under stress, its potential as an indicator of salt tolerance in rice in laboratory tests was investigated. Little ethylene was detected in rice seeds in the presence or absence of 0.1 M NaCl with up to 6 days of soaking. When 1‐aminocyclopropane‐1‐carboxylic acid (ACC) was used alone or in combination with salt, ethylene production began on the third day of soaking, reached a maximum by 4 to 5 days, and then declined. A parallel increase in ethylene production and shoot growth occurred in the presence or absence of salt with an increase in ACC concentration, reaching a maximum at 1 to 2 m M ; at 5 to 50 m M both processes were inhibited. The ACC‐derived ethylene production and shoot growth were inhibited to varying extent in the rice genotypes by the addition of 0.1 M NaCl. At the saturating dose of ACC (2 m M ), ethylene production and shoot growth appeared to depend on the activity of the ethylene forming enzyme (EFE) since Co 2+ , and not aminoethoxyvinylglycine (AVG), inhibited both processes. The capacity of rice to produce ACC‐dependent ethylene was a cultivar trait and correlated well ( r = 0.91) with salt tolerance at the seedling stage. The data indicate that ethylene may serve as a biochemical marker for mass screening of large breeding populations of rice for salinity tolerance at the seedling establishment phase.
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Claims 8
Claim · model-written summary
Little ethylene was detected after up to six days of soaking with or without salt.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- seedse0
- Treatment
- 0.1 M NaCle0
- Outcome
- ethylenee0
- Qualifier
- up to 6 days of soakinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little ethylene was detected in rice seeds in the presence or absence of 0.1 M NaCl with up to 6 days of soaking”
Claim · model-written summary
With ACC, ethylene production started day three, peaked by day four to five and declined.
- Taxon
- RiceOryza sativat0
- Treatment
- 1‐aminocyclopropane‐1‐carboxylic acid (ACC)e0
- Outcome
- ethylene productione0
- Direction
- reached a maximume0
- Qualifier
- third day of soakinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When 1‐aminocyclopropane‐1‐carboxylic acid (ACC) was used alone or in combination with salt, ethylene production began on the third day of soaking, reached a maximum by 4 to 5 days, and then declined”
t0“Rice1”
Claim · model-written summary
Ethylene production and shoot growth rose with ACC concentration to a maximum at 1 to 2 m M.
- Taxon
- RiceOryza sativat0
- Treatment
- ACC concentratione0
- Outcome
- ethylene production and shoot growthe0
- Direction
- increasee0
- Value
- 1 to 2 m Me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A parallel increase in ethylene production and shoot growth occurred in the presence or absence of salt with an increase in ACC concentration, reaching a maximum at 1 to 2 m M”
t0“Rice1”
Claim · model-written summary
At 5 to 50 m M ACC, ethylene production and shoot growth were inhibited.
- Taxon
- RiceOryza sativat0
- Treatment
- 5 to 50 m Me0
- Outcome
- ethylene production and shoot growthe1
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 5 to 50 m M both processes were inhibited”
e1“A parallel increase in ethylene production and shoot growth occurred in the presence or absence of salt with an increase in ACC concentration”
t0“Rice1”
Claim · model-written summary
Salt inhibited ACC-derived ethylene production and shoot growth to varying extents among genotypes.
- Taxon
- riceOryza sativae0
- Treatment
- addition of 0.1 M NaCle0
- Outcome
- ACC‐derived ethylene production and shoot growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ACC‐derived ethylene production and shoot growth were inhibited to varying extent in the rice genotypes by the addition of 0.1 M NaCl”
Claim · model-written summary
Cobalt inhibited ethylene production and shoot growth at saturating ACC, whereas AVG did not.
- Taxon
- RiceOryza sativat0
- Treatment
- Co 2+e0
- Outcome
- ethylene production and shoot growthe0
- Direction
- inhibitede0
- Qualifier
- saturating dose of ACC (2 m M )e0
- Comparator
- aminoethoxyvinylglycine (AVG)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the saturating dose of ACC (2 m M ), ethylene production and shoot growth appeared to depend on the activity of the ethylene forming enzyme (EFE) since Co 2+ , and not aminoethoxyvinylglycine (AVG), inhibited both processes”
t0“Rice1”
Claim · model-written summary
ACC-dependent ethylene production correlated with seedling salt tolerance at r = 0.91.
- Taxon
- riceOryza sativae0
- Organ / stage
- seedling stagee0
- Treatment
- ACC‐dependent ethylenee0
- Outcome
- salt tolerancee0
- Value
- r = 0.91e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The capacity of rice to produce ACC‐dependent ethylene was a cultivar trait and correlated well ( r = 0.91) with salt tolerance at the seedling stage”
Claim · model-written summary
The authors propose ethylene as a marker for screening rice seedling salt tolerance.
- Taxon
- riceOryza sativae0
- Outcome
- biochemical marker for mass screeninge0
- Qualifier
- salinity tolerance at the seedling establishment phasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene may serve as a biochemical marker for mass screening of large breeding populations of rice for salinity tolerance at the seedling establishment phase”
The same questions in other papers
sodium chloride · physiology: hormones · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
co2 · physiology: hormones · Oryza sativa (rice)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
3 papers more in this group
See all 7 papers →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.