Abstract
ABSTRACT Primary roots of intact maize plants ( Zea mays L.) grown for several days in nutrient solutions containing 100 mol m −3 NaCl and additional calcium, had relatively inhibited rates of elongation. Possible physical restraints underlying this salt induced inhibition were investigated. The inhibition did not involve reductions in osmotic potential gradients and turgor in the tip tissues responsible for root elongation growth. The apparent yield threshold pressure, which is related to capacity of cell walls to undergo loosening by stress relaxation, was estimated psychrometrically in excised root tips. Salinity increased yield threshold values. Comparative root extensibility values were obtained for intact plants by determining the initial (1 min) increase in root elongation rate induced by an 0.1 MPa osmotic jump. Comparative extensibility was significantly reduced in the salinized root tips. Salinity did not reduce capacities for water efflux and associated elastic contraction in root tip tissues of intact plants exposed to hypertonic mannitol. We conclude that cell wall hardening in the elongating root tips is an important component of root growth inhibition induced by long‐term salinization.
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Claims 6
Claim · model-written summary
Maize root elongation was inhibited under NaCl with added calcium.
- Organ / stage
- Primary rootse0
- Treatment
- 100 mol m −3 NaCl and additional calciume0
- Outcome
- rates of elongatione0
- Direction
- inhibitede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Primary roots of intact maize plants ( Zea mays L.) grown for several days in nutrient solutions containing 100 mol m −3 NaCl and additional calcium, had relatively inhibited rates of elongation”
Claim · model-written summary
Salinity did not reduce osmotic potential gradients and turgor in root tip tissues.
- Organ / stage
- tip tissuese0
- Treatment
- inhibitione0
- Outcome
- osmotic potential gradients and turgore0
- Direction
- did not involve reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition did not involve reductions in osmotic potential gradients and turgor in the tip tissues responsible for root elongation growth”
e1“intact maize plants ( Zea mays L.)”
Claim · model-written summary
Salinity increased the apparent yield threshold pressure of maize root tips.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity increased yield threshold values”
e1“intact maize plants ( Zea mays L.)”
Claim · model-written summary
Salinity significantly reduced comparative root extensibility in maize root tips.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparative extensibility was significantly reduced in the salinized root tips”
e1“intact maize plants ( Zea mays L.)”
Claim · model-written summary
Salinity did not reduce root tip water efflux or elastic contraction under hypertonic mannitol.
- Organ / stage
- root tip tissuese0
- Treatment
- Salinitye0
- Outcome
- capacities for water efflux and associated elastic contractione0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity did not reduce capacities for water efflux and associated elastic contraction in root tip tissues of intact plants exposed to hypertonic mannitol”
e1“intact maize plants ( Zea mays L.)”
Claim · model-written summary
The authors conclude cell wall hardening contributes to salt-induced maize root growth inhibition.
- Treatment
- long‐term salinizatione0
- Outcome
- root growth inhibitione0
- Qualifier
- cell wall hardening in the elongating root tipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cell wall hardening in the elongating root tips is an important component of root growth inhibition induced by long‐term salinization”
e1“intact maize plants ( Zea mays L.)”
The same questions in other papers
calcium atom · growth · Zea mays (maize)Results differ
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- positive
- positive
- positive
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See all 33 papers →salinity · yield · Zea mays (maize)Results differ
60 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- positive
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See all 70 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.