Abstract
Reaumuria trigyna is a relic species in the desert shrubbery vegetation in arid regions of northwestern China, and plays an important role in the maintenance of the stability of desert vegetation. In this paper, the seed traits and germination strategy of R. trigyna under different environmental conditions, e.g., light, temperature, soil moisture, and sand bury, were investigated. The results showed that R. trigyna seed had high vigor and high germination rate, and endured reserve. The seed could germinate either in light or in darkness, and the optimal temperature for germination was 20 degrees C - 25 degrees C or 15 degrees C/25 degrees C, with the germination rate being 93%. The seed could start to germinate when soil moisture content was 2%, and the germination rate was the highest (89%) when the moisture content was 12%. The optimal sand burial depth of R. trigyna seed was 1 cm, and no seed would germinate when the sand burial depth was >5 cm. Sand burial depth had significant effects on the seedling's emergence percentage and growth height, but lesser effects on seedling' s mass. Soil moisture and sand burial depth were the main environmental factors limiting the seed germination and seedling emergence of R. trigyna. The high seed germination rate of R. trigyna enhanced the survival risk of its seedlings, which was unfavorable to its handling with the extreme changes of desert environment. Such a character of R. trigyna seed was one of the factors causing the species endangered.
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Claims 12
Claim · model-written summary
Seeds of Reaumuria trigyna could germinate in either light or darkness.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Outcome
- germinatee1
- Qualifier
- either in light or in darknesse1
Verbatim
t0“Reaumuria trigyna”
e1“The seed could germinate either in light or in darkness”
Claim · model-written summary
The optimal temperature for germination was 20-25 degrees C or 15/25 degrees C.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Outcome
- optimal temperature for germinatione2
- Value
- 20 degrees C - 25 degrees C or 15 degrees C/25 degrees Ce2
Verbatim
t0“Reaumuria trigyna”
e2“the optimal temperature for germination was 20 degrees C - 25 degrees C or 15 degrees C/25 degrees C”
Claim · model-written summary
Germination rate reached 93% under the optimal temperature.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Outcome
- germination ratee3
- Value
- 93%e3
Verbatim
t0“Reaumuria trigyna”
e3“with the germination rate being 93%”
Claim · model-written summary
Seeds could start to germinate when soil moisture content was 2%.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Treatment
- soil moisture contente4
- Outcome
- start to germinatee4
- Value
- 2%e4
Verbatim
t0“Reaumuria trigyna”
e4“The seed could start to germinate when soil moisture content was 2%”
Claim · model-written summary
The germination rate was highest (89%) at 12% soil moisture content.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Treatment
- moisture contente5
- Outcome
- germination ratee5
- Direction
- higheste5
- Value
- 89%e5
Not reportedComparator
Verbatim
t0“Reaumuria trigyna”
e5“the germination rate was the highest (89%) when the moisture content was 12%”
Claim · model-written summary
The optimal sand burial depth for seed germination was 1 cm.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Treatment
- sand burial depthe6
- Outcome
- optimal sand burial depthe6
- Value
- 1 cme6
Verbatim
t0“Reaumuria trigyna”
e6“The optimal sand burial depth of R. trigyna seed was 1 cm”
Claim · model-written summary
No seed germinated when sand burial depth was greater than 5 cm.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Treatment
- sand burial depthe7
- Outcome
- germinatee7
- Value
- >5 cme7
Verbatim
t0“Reaumuria trigyna”
e7“no seed would germinate when the sand burial depth was >5 cm”
Claim · model-written summary
Sand burial depth had significant effects on seedling emergence percentage and growth height.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Treatment
- Sand burial depthe0
- Outcome
- seedling's emergence percentage and growth heighte0
Not reportedComparatorDirection
Verbatim
t0“Reaumuria trigyna”
e0“Sand burial depth had significant effects on the seedling's emergence percentage and growth height”
Claim · model-written summary
Sand burial depth had lesser effects on seedling mass than on emergence and height.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Treatment
- Sand burial depthe0
- Outcome
- seedling' s masse1
Not reportedComparatorDirection
Verbatim
t0“Reaumuria trigyna”
e0“Sand burial depth had significant effects on the seedling's emergence percentage and growth height”
e1“but lesser effects on seedling' s mass”
Claim · model-written summary
The high seed germination rate of Reaumuria trigyna enhanced the survival risk of its seedlings.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Outcome
- survival risk of its seedlingse1
- Qualifier
- high seed germination ratee1
Verbatim
t0“Reaumuria trigyna”
e1“The high seed germination rate of R. trigyna enhanced the survival risk of its seedlings”
Claim · model-written summary
The high-germination seed character was one of the factors causing the species to be endangered.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Outcome
- the species endangerede1
- Qualifier
- Such a character of R. trigyna seede1
Verbatim
t0“Reaumuria trigyna”
e1“Such a character of R. trigyna seed was one of the factors causing the species endangered”
Claim · model-written summary
Seeds of Reaumuria trigyna had high vigor and high germination rate.
- Taxon
- Reaumuria trigynaReaumuria trigynat0
- Outcome
- high vigor and high germination ratee1
Verbatim
t0“Reaumuria trigyna”
e1“R. trigyna seed had high vigor and high germination rate”