کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3419216 1225807 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Factores bióticos y abióticos que afectan la calidad de las semillas de Schinopsis balansae Engl. y Aspidosperma quebracho-blanco Schltdl
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی میکروب شناسی
پیش نمایش صفحه اول مقاله
Factores bióticos y abióticos que afectan la calidad de las semillas de Schinopsis balansae Engl. y Aspidosperma quebracho-blanco Schltdl
چکیده انگلیسی
Aspidosperma quebracho-blanco (white quebracho) and Schinopsis balansae (red quebracho) are distinctive trees of the South American Park in Argentina. Quebrachos are found in forests that have been exploited very intensively. The object of this work was the identification of biotic and abiotic factors specially fungal pathogen that affect the quality of both species and its relation with germination. Seeds where evaluated through germination test and the percentage of the incidence of fungal agents in two different years of harvest was determined. In S. balansae the germination rate was 77% and of 27% in 2000 and 2001 harvests, respectively. Associations fungi - germination were found in 2001 for Alternaria spp., Curvularia spp., and Fusarium spp., showing an coefficient of correlation = −0.84; −0.85 and −0.73 (p < 0.00004), respectively. A high percentage of vane seeds (55%) was also found in 2001 harvest, due to adverse environmental factors, specifically higher precipitations during flowering. In A. quebracho-blanco seeds, the germination rate was 50% and 90% in 2000 and 2003 respectively, with a 42% of immature seeds in 2000 harvest that was associated to high precipitations and high temperatures during flowering and ripping of fruits. The incidence of pathogens was low and did not have association to germination.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Revista Iberoamericana de Micología - Volume 24, Issue 2, June 2007, Pages 142-147
نویسندگان
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