Abstract
ABSTRACT Anoxia associated with flooding stress is detrimental to plant growth and productivity. When maize seedlings 2 to 7 d old were exposed to anoxic stress, 3‐d‐old seedlings were found to have much lower tolerance than 2‐d‐old seedlings. Ninety per cent of 2‐d‐old seedlings survived 72 h of anoxic stress compared with 0% of the 3‐d‐old seedlings. Since 2‐d‐old isolated root tips survived anoxic stress better than 3‐d‐old tips, the anoxic tolerance of 2‐d‐old seedlings was independent of the translocation of nutrient reserves from the endosperm to the root. The addition of glucose to the medium improved the anoxia tolerance of 2‐d‐old seedlings by 25% but had no effect on 3‐d‐old seedlings. Acclimation by pre‐cxposure to 4% oxygen and pre‐treatment with 100mmol m −1 abscisic acid (ABA) improved the anoxia tolerance of 3‐d‐old seedlings by 2‐ and 4‐fold, respectively. However, acclimation and ABA treatment had no effect on 2‐d‐old seedlings. The results indicate that anoxia tolerance in maize is develop‐mentally regulated. The mechanism of anoxia tolerance innate to 2‐d‐old seedlings was inducible in 3‐d‐old seedlings by acclimation or treatment with ABA.
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Claims 11
Claim · model-written summary
Three-day-old maize seedlings had lower anoxia tolerance than two-day-old seedlings.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3‐d‐old seedlings were found to have much lower tolerance than 2‐d‐old seedlings”
t0“maize”
Claim · model-written summary
After 72 hours of anoxia, 90% of two-day-old seedlings survived.
- Organ / stage
- 2‐d‐old seedlingse0
- Outcome
- survivede0
- Value
- Ninety per cente0
- Comparator
- 3‐d‐old seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ninety per cent of 2‐d‐old seedlings survived 72 h of anoxic stress compared with 0% of the 3‐d‐old seedlings”
t0“maize”
Claim · model-written summary
After 72 hours of anoxia, no three-day-old seedlings survived.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ninety per cent of 2‐d‐old seedlings survived 72 h of anoxic stress compared with 0% of the 3‐d‐old seedlings”
t0“maize”
Claim · model-written summary
Two-day-old isolated root tips survived anoxia better than three-day-old tips.
- Organ / stage
- isolated root tipse0
- Outcome
- survived anoxic stresse0
- Direction
- bettere0
- Comparator
- 3‐d‐old tipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2‐d‐old isolated root tips survived anoxic stress better than 3‐d‐old tips”
t0“maize”
Claim · model-written summary
Glucose increased anoxia tolerance in two-day-old seedlings by 25%.
- Organ / stage
- 2‐d‐old seedlingse0
- Treatment
- addition of glucosee0
- Outcome
- anoxia tolerancee0
- Direction
- improvede0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of glucose to the medium improved the anoxia tolerance of 2‐d‐old seedlings by 25%”
t0“maize”
Claim · model-written summary
Glucose had no effect on anoxia tolerance in three-day-old seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of glucose to the medium improved the anoxia tolerance of 2‐d‐old seedlings by 25% but had no effect on 3‐d‐old seedlings”
t0“maize”
Claim · model-written summary
Low-oxygen acclimation doubled anoxia tolerance in three-day-old seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acclimation by pre‐cxposure to 4% oxygen and pre‐treatment with 100mmol m −1 abscisic acid (ABA) improved the anoxia tolerance of 3‐d‐old seedlings by 2‐ and 4‐fold, respectively”
t0“maize”
Claim · model-written summary
ABA pretreatment quadrupled anoxia tolerance in three-day-old seedlings.
- Treatment
- pre‐treatment with 100mmol m −1 abscisic acid (ABA)e0
- Outcome
- anoxia tolerancee0
- Direction
- improvede0
- Value
- 4‐folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acclimation by pre‐cxposure to 4% oxygen and pre‐treatment with 100mmol m −1 abscisic acid (ABA) improved the anoxia tolerance of 3‐d‐old seedlings by 2‐ and 4‐fold, respectively”
t0“maize”
Claim · model-written summary
Acclimation had no effect on two-day-old seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acclimation and ABA treatment had no effect on 2‐d‐old seedlings”
t0“maize”
Claim · model-written summary
ABA treatment had no effect on two-day-old seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acclimation and ABA treatment had no effect on 2‐d‐old seedlings”
t0“maize”
Claim · model-written summary
The innate tolerance mechanism of two-day-old seedlings could be induced in three-day-old seedlings by acclimation or ABA.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mechanism of anoxia tolerance innate to 2‐d‐old seedlings was inducible in 3‐d‐old seedlings by acclimation or treatment with ABA”
t0“maize”
The same questions in other papers
glucose · disease · Zea mays (maize)Positive and negative results
1 in the opposite direction
- no effect
(+)-abscisic acid · disease · Zea mays (maize)Positive and negative results
5 papers in the same direction as this paper · 4 in the opposite direction
- positive
- no effect
- negative
6 papers more in this group
See all 10 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.