ISSN:
1573-5095
Schlagwort(e):
Pseudotsuga menziesii
;
cone abortion
;
seed orchard
;
pollination
;
ice nucleation
;
bacteria
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Notizen:
Abstract Total bacteria and fluorescent Pseudomonas populations were monitored on buds, conclets and foliage in a Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) seed orchard in April 1986 and between October 1986 and May 1987, over periods that spanned two pollination seasons. Seasonal variation in bacterial numbers was observed, with the highest levels occurring in the late winter and early spring. Bacterial populations active in ice nucleation were found. Bacterial numbers during pollination were higher in 1986 than in 1987. Conclet abortion at pollination was also higher in 1986 (55%) than in 1987 (11%). A relationship may exist between bacterial populations and conelet abortion at pollination.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00119590
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