Abstract
The heat balance technique for measuring sap flow was used to determine how plant stress from watering various proportions of the root system in corn (Zea mays L.) affects sap flow and root and shoot growth. Sectional root-boxes were used to divide the root system into four equal compartments so that known proportions of the root system could be subjected to water stress. Results indicated that the root-box technique is useful in studying the effects of adverse growing conditions in corn. Treatments consisted of no watering and watering one, two, three, or four sections of the box. Sap flow was measured using gauges that worked on a heat balance principle, and aspects of root and shoot growth were also measured. Withholding water from two or more sections of the box for 26 d resulted in decreased sap flow and fresh and dry weight of stalks compared with plants where all four sections were watered (control). Plant height was lower in boxes where one or more sections were deprived of water compared with the control. Dry weight of roots was less when water was withheld from three or all sections of the roots, and fresh weight of roots was less when water was withheld from all four sections. Corn plants with even half the roots growing under stressed conditions resulted in decreased sap flow and shoot growth.Key words: Root-box, moisture stress
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Claims 5
Claim · model-written summary
The root-box technique was useful for studying adverse growing conditions in corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Outcome
- root-box technique is usefule0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results indicated that the root-box technique is useful in studying the effects of adverse growing conditions in corn.”
Claim · model-written summary
Withholding water from at least two root-box sections for 26 days decreased sap flow and fresh and dry stalk weights relative to fully watered controls.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Withholding water from two or more sections of the box for 26 de0
- Outcome
- sap flow and fresh and dry weight of stalkse0
- Direction
- decreasede0
- Comparator
- plants where all four sections were waterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Withholding water from two or more sections of the box for 26 d resulted in decreased sap flow and fresh and dry weight of stalks compared with plants where all four sections were watered (control).”
t0“corn (Zea mays L.)”
Claim · model-written summary
Plant height was lower when at least one root-box section was deprived of water.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- one or more sections were deprived of watere0
- Outcome
- Plant heighte0
- Direction
- lowere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height was lower in boxes where one or more sections were deprived of water compared with the control.”
t0“corn (Zea mays L.)”
Claim · model-written summary
Root dry weight was lower when water was withheld from three or all root sections.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- water was withheld from three or all sections of the rootse0
- Outcome
- Dry weight of rootse0
- Direction
- lesse0
- Comparator
- plants where all four sections were waterede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry weight of roots was less when water was withheld from three or all sections of the roots”
t0“corn (Zea mays L.)”
e1“plants where all four sections were watered (control)”
Claim · model-written summary
Root fresh weight was lower when water was withheld from all four root sections.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- water was withheld from all four sectionse0
- Outcome
- fresh weight of rootse0
- Direction
- lesse0
- Comparator
- plants where all four sections were waterede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fresh weight of roots was less when water was withheld from all four sections.”
t0“corn (Zea mays L.)”
e1“plants where all four sections were watered (control)”
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
- no effect
- negative
- positive
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.