Abstract：
:Seeds from three provenances of Pinus brutia were stratified for 0 or 45 d (days) at 4 +/- 1 degrees C and then germinated at 15 degrees C or 20 degrees C on filter paper saturated with polyethylene glycol solutions to provide water potentials of 0, -0.2 and -0.4 MPa (mega Pascal). Regardless of stratification, germination was lower at 15 degrees C than 20 degrees C for seeds of all provenances. Stratification significantly increased germination percentage at all water potentials regardless of the germination temperatures. Lowering the water potential to -0.4 MPa reduced germination for all three provenances in unstratified and stratified seeds when averaged for two temperatures, but reaction to the increased water stress was different among the provenances. Combined over two temperatures, stratified or unstratified seeds from the highest elevation (Cehennemdere) had the lowest germination performance at all water potentials, and stratified and nonstratified seeds from a coastal elevation (Silifke) had the highest germination parameters at the lowest water potential (-0.4 MPa). It might be concluded that seed germination and resistance to water stress vary according to provenance and stratification.
journal_name
J Environ Bioljournal_title
Journal of environmental biologyauthors
Tilki F,Dirik Hsubject
Has Abstractpub_date
2007-01-01 00:00:00pages
133-6issue
1eissn
0254-8704issn
2394-0379journal_volume
28pub_type
杂志文章abstract：:Raw pesticide import data from 1977 to 2009 obtained from the Ministry of Agriculture in Costa Rica were processed and analyzed. The quantity of specific active ingredients (a.i.), and chemical groups were calculated by year and presented in ten-year periods. Three sets of environmental hazard indicators were construc...
journal_title：Journal of environmental biology
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更新日期：2014-01-01 00:00:00
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journal_title：Journal of environmental biology
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journal_title：Journal of environmental biology
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更新日期：2015-07-01 00:00:00
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journal_title：Journal of environmental biology
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journal_title：Journal of environmental biology
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journal_title：Journal of environmental biology
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journal_title：Journal of environmental biology
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更新日期：2005-06-01 00:00:00
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更新日期：2014-09-01 00:00:00
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journal_title：Journal of environmental biology
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更新日期：2009-09-01 00:00:00
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journal_title：Journal of environmental biology
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journal_title：Journal of environmental biology
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pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
