Abstract
Abstract Growth response of plants to root‐zone temperature (RZT) varies with species. We studied the effects of RZT on muskmelons (Cucumis melo L. ‘Gold Star') held continuously at 25°, 30°, 35°, 40°, and 45°C in a nutrient solution bath for 12 days. Muskmelon seedling sizes used were the first and fourth leaf growth stages. Large seedling size growth rate was approximately double that of the small size. Plant fresh weight gain for large plants was highest at the 25°C RZT, while for small plants fresh weight gain was similar from 25 to 35°C. But dry weight gain was similar for both plant sizes from 25 to 35°C. Root‐zone temperatures >35°C resulted in a sharp linear decrease in fresh weight, dry weight, and leaf number. Shoot elemental phosphorus (P), zinc (Zn), and manganese (Mn) content and concentration followed the same pattern as growth. Root P and Zn concentration increased linearly with increasing RZT, but Mn concentration reached a maximum at 35°C. The RZT threshold for optimum muskmelon seedling growth seems to be 35 to 36°C.
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Claims 8
Claim · model-written summary
Fresh weight gain of large muskmelon plants was highest at 25°C root-zone temperature.
- Taxon
- muskmelon
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Cucumis meloe1 - Treatment
- 25°C RZTe2
- Outcome
- fresh weight gaine2
- Direction
- higheste2
- Qualifier
- for large plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“We studied the effects of RZT on muskmelons”
e2“Plant fresh weight gain for large plants was highest at the 25°C RZT”
Claim · model-written summary
Fresh weight gain of small muskmelon plants was similar from 25 to 35°C.
- Taxon
- muskmelonCucumis meloe1
- Treatment
- from 25 to 35°Ce3
- Outcome
- fresh weight gaine3
- Direction
- similare3
- Qualifier
- for small plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the effects of RZT on muskmelons”
e3“for small plants fresh weight gain was similar from 25 to 35°C”
Claim · model-written summary
Dry weight gain was similar for both plant sizes from 25 to 35°C.
- Taxon
- muskmelonCucumis meloe1
- Treatment
- from 25 to 35°Ce4
- Outcome
- dry weight gaine4
- Direction
- similare4
- Qualifier
- both plant sizese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the effects of RZT on muskmelons”
e4“But dry weight gain was similar for both plant sizes from 25 to 35°C”
Claim · model-written summary
Root-zone temperatures above 35°C sharply decreased fresh weight, dry weight and leaf number.
- Taxon
- muskmelonCucumis meloe1
- Treatment
- >35°Ce5
- Outcome
- fresh weight, dry weight, and leaf numbere5
- Direction
- decreasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the effects of RZT on muskmelons”
e5“temperatures >35°C resulted in a sharp linear decrease in fresh weight, dry weight, and leaf number”
Claim · model-written summary
Shoot P, Zn and Mn content and concentration followed the same pattern as growth.
- Taxon
- muskmelonCucumis meloe1
- Organ / stage
- Shoote6
- Outcome
- Shoot elemental phosphorus (P), zinc (Zn), and manganese (Mn) content and concentratione6
- Direction
- followed the same patterne6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the effects of RZT on muskmelons”
e6“Shoot elemental phosphorus (P), zinc (Zn), and manganese (Mn) content and concentration followed the same pattern as growth”
Claim · model-written summary
Root P and Zn concentration increased linearly with increasing root-zone temperature.
- Taxon
- muskmelonCucumis meloe1
- Organ / stage
- Roote7
- Treatment
- increasing RZTe7
- Outcome
- P and Zn concentratione7
- Direction
- increased linearlye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the effects of RZT on muskmelons”
e7“Root P and Zn concentration increased linearly with increasing RZT”
Claim · model-written summary
Mn concentration reached a maximum at 35°C.
- Taxon
- muskmelonCucumis meloe1
- Treatment
- 35°Ce2
- Outcome
- Mn concentratione2
- Direction
- reached a maximume2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the effects of RZT on muskmelons”
e2“Mn concentration reached a maximum at 35°C”
Claim · model-written summary
The root-zone temperature threshold for optimum muskmelon seedling growth is about 35 to 36°C.
- Taxon
- muskmelonCucumis meloe0
- Outcome
- RZT threshold for optimum muskmelon seedling growthe0
- Value
- 35 to 36°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RZT threshold for optimum muskmelon seedling growth seems to be 35 to 36°C”