Linked Life Data

15825432

Source:http://linkedlifedata.com/resource/pubmed/id/15825432

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2005-4-13
pubmed:abstractText
The effects of different light and temperature conditions on seed germination of two keystone species (Picea asperata and Betula albo-sinensis) in subalpine coniferous forests were studied by simulating environmental conditions in climatic chambers. The results indicated that the optimal temperature of seed germination for both species was 25 degrees C, with the germination rate of 88.8 +/- 8.4% and 30.8 +/- 10.4%, respectively. Through multiple comparisons with Tukey's HSD, B. albo-sinensis was more sensitive to temperature than P. asperata. Seeds of P. asperata could germinate when the temperature reached 10 degrees C, but those of B. albo-sinensis could not, which implied that the latter as a pioneer species of subalpine coniferous forest areas needed higher lowest temperature for seed germination. Day and night temperature difference (15 degreesC/10 degrees C, 20 degrees C/15 degrees C and 20 degrees C/10 degrees C) had significant effect on the germination rates of tested seeds, which was the highest under 20 degrees C/15 degrees C. A wide range of day and night temperature difference seemed to be unfavorable to the seed germination of B. albo-sinensis. Light intensity also had a marked effect on the germination rates of test seeds. Under 20% transmittance, the germination rate of P. asperata and B. albo-sinensis was the highest, being 83.0 +/- 6.6% and 29.2 +/- 5.5%, respectively, and the initiation time and regularity of germination were the best as well. Furthermore, B. albo-sinensis was less sensitive to light than P. asperata, which was determined by the life behavior of tree itself.
pubmed:language
chi
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1001-9332
pubmed:author
pubmed:issnType
Print
pubmed:volume
15
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2229-32
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
[Effects of light and temperature on seed germination of Picea asperata and Betula albo-sinensis].
pubmed:affiliation
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China. wuyan@cib.ac.cn
pubmed:publicationType
Journal Article, English Abstract, Research Support, Non-U.S. Gov't