Abstract
Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed. When the roots were placed in a humid atmosphere after the stress, the growth rate increased again, even if elongation had been totally inhibited. Under a stress corresponding to an osmotic potential of ‐1.09 MPa in the solution, growth was totally inhibited, which means that the root cell turgor pressure was reduced to the yield threshold. These conditions led to the largest accumulation of ABA. The effect of water stress on the level of ABA was studied for three parts of the root. The greatest increase in ABA (about 10 fold) was obtained in the growth zone and this increase was apparently independent of the hydrolysis of the conjugated form. With a mannitol treatment of 1 h equivalent to a stress level of ‐1.39 MPa, a 4‐fold increase in ABA efflux into the medium was obtained. These results suggest that there are interactions between water stress, root growth, osmotic potential and the ABA level. The growth under conditions of stress and the role of endogenous ABA in the control of plant metabolism, specially in the growth zone, are discussed.
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Claims 10
Claim · model-written summary
Mannitol-induced water stress inhibited growth of maize root apices.
- Material
- LG 11e0
- Organ / stage
- apical 12 mm of intact rootse0
- Treatment
- mannitol solutionse0
- Outcome
- growthe0
- Direction
- inhibitione0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
Claim · model-written summary
Mannitol-induced water stress decreased the osmotic potential of maize root cell sap.
- Material
- LG 11e0
- Treatment
- mannitol solutionse0
- Outcome
- osmotic potential of the cell sape0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
Claim · model-written summary
Mannitol-induced water stress significantly increased abscisic acid accumulation in maize roots.
- Material
- LG 11e0
- Treatment
- mannitol solutionse0
- Outcome
- accumulation of abscisic acid (ABA)e0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
Claim · model-written summary
Growth rate of maize roots increased again after stressed roots were placed in a humid atmosphere, even though elongation had been totally inhibited.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e1“When the roots were placed in a humid atmosphere after the stress, the growth rate increased again, even if elongation had been totally inhibited”
Claim · model-written summary
Under stress equivalent to an osmotic potential of ‐1.09 MPa, growth of maize roots was totally inhibited.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e3“growth was totally inhibited, which means that the root cell turgor pressure was reduced to the yield threshold”
Claim · model-written summary
Root cell turgor pressure was reduced to the yield threshold under the stress that totally inhibited growth.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e3“growth was totally inhibited, which means that the root cell turgor pressure was reduced to the yield threshold”
Claim · model-written summary
The greatest increase in ABA (about 10 fold) in maize roots occurred in the growth zone under water stress.
- Organ / stage
- growth zonee4
- Treatment
- water stresse0
- Outcome
- ABAe4
- Direction
- greatest increasee4
- Value
- about 10 folde4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e4“The greatest increase in ABA (about 10 fold) was obtained in the growth zone”
Claim · model-written summary
The ABA increase in the growth zone was apparently independent of hydrolysis of its conjugated form.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e4“The greatest increase in ABA (about 10 fold) was obtained in the growth zone”
e5“this increase was apparently independent of the hydrolysis of the conjugated form”
Claim · model-written summary
A mannitol treatment of 1 h caused a 4-fold increase in ABA efflux into the medium.
- Treatment
- mannitol treatment of 1 he6
- Outcome
- ABA efflux into the mediume6
- Direction
- increasee6
- Value
- 4‐folde6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e6“With a mannitol treatment of 1 h equivalent to a stress level of ‐1.39 MPa, a 4‐fold increase in ABA efflux into the medium was obtained”
Claim · model-written summary
Water stress, root growth, osmotic potential and ABA level appear to interact in maize roots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, induced by mannitol solutions (0 to 0.66 M ) applied to the apical 12 mm of intact roots of Zea mays L. (cv. LG 11), a growth inhibition, a decrease in the osmotic potential of the cell sap and a significant accumulation of abscisic acid (ABA) were observed”
e7“These results suggest that there are interactions between water stress, root growth, osmotic potential and the ABA level”
The same questions in other papers
mannitol · growth · Zea mays (maize)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
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.