Abstract
Germination energy of cottonwood seed decreased gradually as moisture stress increased from 0.0 to 10.0 atm; 15.0 atm inhibited germination except at 32 and 38 C. Temperature extremes of 15 and 38 C drastically reduced germination energy, and the reductive effect of 38 C was particularly marked after storage. Only 15-atm moisture stress or 15 C greatly reduced total germination. Germination under optimum conditions (27-32 C) was reduced from 90% to 69% by 12 months' storage. Little seedling growth took place at stresses above 5 atm and at temperatures of 15 and 38 C. Initial growth was related to seed size, which varied considerably with parent tree.
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Claims 8
Claim · model-written summary
Germination energy of cottonwood seed decreased gradually as moisture stress rose from 0.0 to 10.0 atm.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- moisture stress increased from 0.0 to 10.0 atme0
- Outcome
- Germination energye0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Germination energy of cottonwood seed decreased gradually as moisture stress increased from 0.0 to 10.0 atm”
t0“Eastern Cottonwood”
Claim · model-written summary
A moisture stress of 15.0 atm inhibited cottonwood germination except at 32 and 38 C.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- 15.0 atme0
- Outcome
- germinatione0
- Direction
- inhibitede0
- Qualifier
- except at 32 and 38 Ce0
Not reportedComparator
Verbatim
e0“15.0 atm inhibited germination except at 32 and 38 C”
t0“Eastern Cottonwood”
Claim · model-written summary
Temperature extremes of 15 and 38 C drastically reduced germination energy of cottonwood seed.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- Temperature extremes of 15 and 38 Ce0
- Outcome
- germination energye0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Temperature extremes of 15 and 38 C drastically reduced germination energy”
t0“Eastern Cottonwood”
Claim · model-written summary
The reductive effect of 38 C on germination energy was particularly marked after seed storage.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- 38 Ce0
- Outcome
- germination energye0
- Direction
- particularly markede0
- Qualifier
- after storagee0
Not reportedComparator
Verbatim
e0“Temperature extremes of 15 and 38 C drastically reduced germination energy, and the reductive effect of 38 C was particularly marked after storage”
t0“Eastern Cottonwood”
Claim · model-written summary
Only 15-atm moisture stress or 15 C greatly reduced total germination of cottonwood.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- 15-atm moisture stress or 15 Ce0
- Outcome
- total germinatione0
- Direction
- greatly reducede0
Not reportedComparator
Verbatim
e0“Only 15-atm moisture stress or 15 C greatly reduced total germination”
t0“Eastern Cottonwood”
Claim · model-written summary
Twelve months of storage reduced cottonwood germination under optimum conditions (27-32 C) from 90% to 69%.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- 12 months' storagee0
- Outcome
- Germinatione0
- Direction
- reducede0
- Value
- 90% to 69%e0
- Qualifier
- optimum conditions (27-32 C)e0
Not reportedComparator
Verbatim
e0“Germination under optimum conditions (27-32 C) was reduced from 90% to 69% by 12 months' storage”
t0“Eastern Cottonwood”
Claim · model-written summary
Little cottonwood seedling growth took place at moisture stresses above 5 atm and at temperatures of 15 and 38 C.
- Taxon
- Eastern Cottonwoodt0
- Treatment
- stresses above 5 atm and at temperatures of 15 and 38 Ce0
- Outcome
- seedling growthe0
- Direction
- Littlee0
Not reportedComparator
Verbatim
e0“Little seedling growth took place at stresses above 5 atm and at temperatures of 15 and 38 C”
t0“Eastern Cottonwood”
Claim · model-written summary
Initial growth of cottonwood was related to seed size.
Not reportedDirection
Verbatim
e0“Initial growth was related to seed size”
t0“Eastern Cottonwood”