Abstract
S achs , R. M., A. L ang , C. F. B retz and J oan R oach . (U. California, Los Angeles.) Shoot histogenesis: subapical meristematic activity in a caulescent plant and the action of gibberellic acid and Amo—1618. Amer. Jour. Bot. 47(4): 260—266. Illus. 1960.–Studies on gibbereilininduced stem formation in rosette plants (Sachs et al., 1959) have shown that a zone of intensive meristematic activity, arising below the existing apical meristem, is almost solely responsible for stem histogenesis, i.e., the formation of the cells constituting the elongate stem. An extensive subapical zone of meristematic activity is also present in caulescent plants, such as Chrysanthemum morifolium, Amo‐1618 ([4‐hydroxy‐5 isopropyl‐2 methylphenyl] trimethylammonium chloride, 1‐piperidine carboxylate) completely inhibits subapical meristematic activity in chrysanthemum, causing the plants to assume a dwarfed, rosette‐like habit of growth. Gibberellic acid, applied either simultaneously, or following the Amo—1618 treatment, completely prevents or reverses the effect of Amo—1618, making the plants retain or resume their normal growth habit. Amo—1618 and gibberellic acid have relatively little effect upon the activity of the apical meristem of Chrysanthemum . Thus, while the apical meristem proper (eu‐ or promeristem) is the site of shoot organization and the ultimate source of the cells of the entire shoot, the subapical zone of division, termed the subapical meristem, is largely responsible for stem histogenesis in caulescent as well as in rosette plants. Gibberellins, or native, gibberellin‐like substances appear to regulate the activity of the subapical meristem and thus to play an important role in shoot development. Amo—1618 and related compounds seem to exert their dwarfing effect in plants by acting as antagonists of gibberellins, at least with respect to the latters' function in regulating the subapical meristematic activity in the shoot.
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Claims 8
Claim · model-written summary
A subapical zone of meristematic activity is present in Chrysanthemum morifolium.
- Taxon
- Chrysanthemum morifolium
Chrysanthemum ×morifoliume0 - Outcome
- subapical zone of meristematic activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An extensive subapical zone of meristematic activity is also present in caulescent plants, such as Chrysanthemum morifolium”
Claim · model-written summary
Amo‐1618 completely inhibits subapical meristematic activity in chrysanthemum and causes dwarfed rosette-like growth.
- Taxon
- chrysanthemum
.jpeg?width=60)
Chrysanthemume0 - Organ / stage
- subapical meristematic activitye0
- Treatment
- Amo‐1618e0
- Outcome
- subapical meristematic activitye0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“Amo‐1618 ([4‐hydroxy‐5 isopropyl‐2 methylphenyl] trimethylammonium chloride, 1‐piperidine carboxylate) completely inhibits subapical meristematic activity in chrysanthemum, causing the plants to assume a dwarfed, rosette‐like habit of growth”
Claim · model-written summary
Gibberellic acid given simultaneously with or after Amo—1618 prevents or reverses its effect on chrysanthemum growth habit.
- Taxon
- ChrysanthemumChrysanthemume1
- Treatment
- Gibberellic acide0
- Outcome
- normal growth habite0
- Direction
- prevents or reversese0
- Qualifier
- applied either simultaneously, or following the Amo—1618 treatmente0
- Comparator
- Amo—1618 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid, applied either simultaneously, or following the Amo—1618 treatment, completely prevents or reverses the effect of Amo—1618, making the plants retain or resume their normal growth habit”
t0“SHOOT HISTOGENESIS: SUBAPICAL MERISTEMATIC ACTIVITY IN A CAULESCENT PLANT AND THE ACTION OF GIBBERELLIC ACID AND AMO‐1618”
e1“apical meristem of Chrysanthemum”
Claim · model-written summary
Amo—1618 and gibberellic acid have relatively little effect on chrysanthemum apical meristem activity.
- Taxon
- ChrysanthemumChrysanthemume0
- Treatment
- Amo—1618 and gibberellic acide0
- Outcome
- activity of the apical meristeme0
- Direction
- relatively little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amo—1618 and gibberellic acid have relatively little effect upon the activity of the apical meristem of Chrysanthemum”
Claim · model-written summary
The subapical meristem is largely responsible for stem histogenesis in caulescent and rosette plants.
- Taxon
- plantsViridiplantaee0
- Organ / stage
- subapical meristeme0
- Outcome
- stem histogenesise0
Verbatim
e0“the subapical zone of division, termed the subapical meristem, is largely responsible for stem histogenesis in caulescent as well as in rosette plants”
Claim · model-written summary
The apical meristem organizes shoots and ultimately supplies cells to the whole shoot.
- Taxon
- plantsViridiplantaee1
- Organ / stage
- apical meristem propere0
- Outcome
- shoot organizatione0
Verbatim
e0“the apical meristem proper (eu‐ or promeristem) is the site of shoot organization and the ultimate source of the cells of the entire shoot”
e1“caulescent as well as in rosette plants”
Claim · model-written summary
Gibberellins or native gibberellin-like substances appear to regulate subapical meristem activity and shoot development.
- Taxon
- plantsViridiplantaee1
- Compound
- Gibberellinse0
- Outcome
- activity of the subapical meristeme0
- Qualifier
- shoot developmente0
Verbatim
e0“Gibberellins, or native, gibberellin‐like substances appear to regulate the activity of the subapical meristem and thus to play an important role in shoot development”
e1“caulescent as well as in rosette plants”
Claim · model-written summary
Amo—1618 and related compounds seem to dwarf plants by antagonizing gibberellin regulation of subapical meristem activity.
Verbatim
e0“Amo—1618 and related compounds seem to exert their dwarfing effect in plants by acting as antagonists of gibberellins, at least with respect to the latters' function in regulating the subapical meristematic activity in the shoot”
The same questions in other papers
Gibberellic acid · growth · ChrysanthemumResults differ
19 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
17 papers more in this group
See all 21 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.