Abstract
The effect of far red light on the light-grown bean hypocotyl and its interaction with indole-3-acetic acid (IAA) were studied. Elongation of younger zones of the hypocotyl was inhibited but that of older zones was promoted by far red light. This was controlled by phytochrome. Both the hook and shank portions could receive far red light and its effect could be transmitted to either portions of the hypocotyl. When IAA was applied to the upper cut surface of the hypocotyl unit, elongation of the shank portion was promoted even without far red irradiation. IAA did not change the aspect of the growth curves but amplified the elongation of each zone. When IAA was applied to each zone of the shank portion, elongation of zones older than the treated one was promoted but that of younger zones was inhibited. This effect was emphasized by far red light. When IAA was applied to the older shank portion, elongation of the treated zone was synergistically promoted by IAA and far red light, but when applied to the elbow or younger shank portion, far red light completely nullified the promoting effect of IAA.
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Claims 12
Claim · model-written summary
Far red light inhibited elongation in younger hypocotyl zones.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“Elongation of younger zones of the hypocotyl was inhibited but that of older zones was promoted by far red light”
Claim · model-written summary
Far red light promoted elongation in older hypocotyl zones.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“Elongation of younger zones of the hypocotyl was inhibited but that of older zones was promoted by far red light”
Claim · model-written summary
Phytochrome controlled the age dependent response to far red light.
Verbatim
t0“bean hypocotyl”
e0“This was controlled by phytochrome”
Claim · model-written summary
Both hook and shank received and transmitted far red light effects to either hypocotyl portion.
Verbatim
t0“bean hypocotyl”
e0“Both the hook and shank portions could receive far red light and its effect could be transmitted to either portions of the hypocotyl”
Claim · model-written summary
IAA applied at the upper cut surface promoted shank elongation without far red light.
Verbatim
t0“bean hypocotyl”
e0“When IAA was applied to the upper cut surface of the hypocotyl unit, elongation of the shank portion was promoted even without far red irradiation”
Claim · model-written summary
IAA amplified elongation across zones without changing growth curve shape.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“IAA did not change the aspect of the growth curves but amplified the elongation of each zone”
Claim · model-written summary
IAA did not change the shape of growth curves.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“IAA did not change the aspect of the growth curves but amplified the elongation of each zone”
Claim · model-written summary
IAA applied to each shank zone promoted elongation in older zones.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“When IAA was applied to each zone of the shank portion, elongation of zones older than the treated one was promoted but that of younger zones was inhibited”
Claim · model-written summary
IAA applied to each shank zone inhibited elongation in younger zones.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“When IAA was applied to each zone of the shank portion, elongation of zones older than the treated one was promoted but that of younger zones was inhibited”
Claim · model-written summary
Far red light emphasized the IAA zone dependent effect.
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“This effect was emphasized by far red light”
Claim · model-written summary
IAA and far red light synergistically promoted elongation when IAA was applied to older shank.
- Taxon
- beant0
- Treatment
- IAA and far red lighte0
- Outcome
- elongation of the treated zonee0
- Direction
- synergistically promotede0
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“When IAA was applied to the older shank portion, elongation of the treated zone was synergistically promoted by IAA and far red light”
Claim · model-written summary
Far red light nullified IAA promotion when IAA was applied to the elbow or younger shank.
- Taxon
- beant0
- Organ / stage
- elbow or younger shank portione0
- Treatment
- far red lighte0
- Outcome
- promoting effect of IAAe0
- Direction
- completely nullifiede0
Not reportedComparator
Verbatim
t0“bean hypocotyl”
e0“when applied to the elbow or younger shank portion, far red light completely nullified the promoting effect of IAA”
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See all 41 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.