Abstract
The analysis of longitudinal growth is reviewed in terms of growth trajectories and fields of velocity and relative elemental growth (REG) rate. Then the relationships among cell division rate, cell size, and growth rate are reviewed. A careful distinction is made between spatial (site specific) and material (cellparticle specific) aspects of growth and cell division. The equations indicate the experimental design and numerical analysis needed to assess the physiological importance of gene products recently proposed to regulate cell cycle activity. Effects of temperature and water stress on growth and cell division in seedling roots of maize are described. Temperature changes REG rates and cell production rates in synchrony, so the cell length pattern is unchanged by temperature perturbation between 19 and 29 C. In contrast, water stress has no effect on REG rate in apical regions but shortens the length of the growth zone. Water stress also causes a decrease in the cell production rate. Thus water stress uncouples the synchrony between growth and cell division to produce longer cells at the base of the meristem and shorter cells at the base of the growth zone. The longer cells near the root apex probably facilitate transport of metabolites from the phloem to the dividing cells in stressed roots. In general, patterns of cell size may affect the selection of plants for environmental adaptation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Temperature changed relative elemental growth and cell production rates together.
- Outcome
- REG rates and cell production ratese0
Zea maysNot reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature changes REG rates and cell production rates in synchrony”
t0“seedling roots of maize”
Claim · model-written summary
Temperature perturbation from 19 to 29 C left the root cell length pattern unchanged.
- Treatment
- temperature perturbation between 19 and 29 Ce0
- Outcome
- cell length patterne0
- Direction
- unchangede0
- Value
- 19 and 29 Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cell length pattern is unchanged by temperature perturbation between 19 and 29 C”
t0“seedling roots of maize”
Claim · model-written summary
Water stress did not change relative elemental growth in apical regions.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress has no effect on REG rate in apical regions”
t0“seedling roots of maize”
Claim · model-written summary
Water stress shortened the root growth zone.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress has no effect on REG rate in apical regions but shortens the length of the growth zone”
t0“seedling roots of maize”
Claim · model-written summary
Water stress reduced cell production rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress also causes a decrease in the cell production rate”
t0“seedling roots of maize”
Claim · model-written summary
Water stress produced longer cells at the meristem base.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress uncouples the synchrony between growth and cell division to produce longer cells at the base of the meristem and shorter cells at the base of the growth zone”
t0“seedling roots of maize”
Claim · model-written summary
Water stress produced shorter cells at the growth zone base.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress uncouples the synchrony between growth and cell division to produce longer cells at the base of the meristem and shorter cells at the base of the growth zone”
t0“seedling roots of maize”
Claim · model-written summary
Longer root apex cells probably aid metabolite transport to dividing cells in stressed roots.
- Organ / stage
- root apexe0
- Outcome
- transport of metabolites from the phloem to the dividing cellse0
- Qualifier
- probablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The longer cells near the root apex probably facilitate transport of metabolites from the phloem to the dividing cells in stressed roots”
t0“seedling roots of maize”
Claim · model-written summary
Cell size patterns may influence plant selection for environmental adaptation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“patterns of cell size may affect the selection of plants for environmental adaptation”
t0“seedling roots of maize”
The same questions in other papers
drought · growth · Zea mays (maize)Positive and negative results
307 papers in the same direction as this paper · 77 in the opposite direction
- positive
- no effect
- negative
381 papers more in this group
See all 385 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.