Abstract
Abstract In normal air, illumination with a low level of blue or red light (40 μmol m −2 s −1 ) did not induce stomatal opening in maize plantlets. In CO 2 ‐free air, 40 μmol m −2 s −1 of blue or red light promoted an enhancement in stomatal opening. At the same quantum flux, blue light was more efficient than red light and stomatal closure occurred more rapidly with a significantly shorter lag phase after blue light. Anoxia inhibited light‐dependent stomatal opening, even under 320 μmol m −2 s −1 illumination. However, after 60 min of illumination with 40 μmol m −2 s −1 of blue light in anoxia, transient stomatal opening was observed when the plant was returned to darkness and normal air. This transient stomatal opening was weaker after pretreatment with red light. We conclude that a blue‐light‐dependent process induced under anoxia leads to stomatal opening provided oxygen is present. Possible mechanisms associated with blue‐light‐effect and the nature of the oxygen‐consuming processes are discussed.
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Claims 9
Claim · model-written summary
Low-level blue or red light (40 μmol m −2 s −1) in normal air did not induce stomatal opening in maize
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In normal air, illumination with a low level of blue or red light (40 μmol m −2 s −1) did not induce stomatal opening in maize plantlets”
t0“maize leaves”
Claim · model-written summary
In CO2-free air, blue or red light at 40 μmol m −2 s −1 enhanced stomatal opening in maize
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In CO 2 ‐free air, 40 μmol m −2 s −1 of blue or red light promoted an enhancement in stomatal opening”
t0“maize leaves”
Claim · model-written summary
At the same quantum flux, blue light was more efficient than red light in maize
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“At the same quantum flux, blue light was more efficient than red light”
t0“maize leaves”
Claim · model-written summary
Stomatal closure occurred more rapidly after blue light in maize
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“stomatal closure occurred more rapidly with a significantly shorter lag phase after blue light”
t0“maize leaves”
Claim · model-written summary
The lag phase before stomatal closure was significantly shorter after blue light in maize
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“stomatal closure occurred more rapidly with a significantly shorter lag phase after blue light”
t0“maize leaves”
Claim · model-written summary
Anoxia inhibited light-dependent stomatal opening in maize, even under 320 μmol m −2 s −1 illumination
- Treatment
- Anoxiae5
- Outcome
- stomatal openinge5
- Direction
- inhibitede5
- Qualifier
- even under 320 μmol m −2 s −1 illuminatione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Anoxia inhibited light‐dependent stomatal opening, even under 320 μmol m −2 s −1 illumination”
t0“maize leaves”
Claim · model-written summary
Transient stomatal opening was observed in maize after 60 min of blue light in anoxia when returned to darkness and normal air
- Outcome
- transient stomatal openinge6
- Qualifier
- when the plant was returned to darkness and normal aire6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“after 60 min of illumination with 40 μmol m −2 s −1 of blue light in anoxia, transient stomatal opening was observed when the plant was returned to darkness and normal air”
t0“maize leaves”
Claim · model-written summary
Pretreatment with red light weakened the transient stomatal opening in maize
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“This transient stomatal opening was weaker after pretreatment with red light”
t0“maize leaves”
Claim · model-written summary
The authors conclude that a blue-light-dependent process induced under anoxia leads to stomatal opening only when oxygen is present
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“a blue‐light‐dependent process induced under anoxia leads to stomatal opening provided oxygen is present”
t0“maize leaves”
The same questions in other papers
light · physiology: gas exchange · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- 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.