scholarly journals Substantial variation in the timing of pollen production reduces reproductive synchrony between distant populations of Pinus sylvestris L. in Scotland

2017 ◽  
Vol 7 (15) ◽  
pp. 5754-5765 ◽  
Author(s):  
Richard Whittet ◽  
Stephen Cavers ◽  
Joan Cottrell ◽  
Cristina Rosique-Esplugas ◽  
Richard Ennos
Keyword(s):  
Pinus Sylvestris ◽  
Pollen Production ◽  
Substantial Variation ◽  
Reproductive Synchrony

Seed and pollen production after stem injections of gibberellin A4/7 in field-grown seed orchards of Pinus sylvestris

1998 ◽  
Vol 28 (3) ◽  
pp. 340-346 ◽  
Author(s):  
Urban Eriksson ◽  
Gunnar Jansson ◽  
Curt Almqvist
Keyword(s):  
Pinus Sylvestris ◽  
Seed Production ◽  
Seed Weight ◽  
Floral Induction ◽  
Pollen Production ◽  
Seed Orchards ◽  
Cone Production ◽  
Empty Seeds ◽  
Filled Seeds

The effects of stem injections of gibberellin A4/7 (GA4/7) were studied in two experiments conducted in two different field-grown seed orchards of Pinus sylvestris L. Both experiments were carried out during years with favourable conditions for floral induction, i.e., higher temperatures and less precipitation than average years. In experiment 1, cone production and the number of filled seeds per graft increased significantly, the latter by about 60% compared with the control. Filled seeds per graft increased in experiment 2 as well, although the increase was not statistically significant. In both experiments, GA4/7 treatment significantly reduced the 1000-seed weight but did not significantly affect the number of filled and empty seeds per cone. In both experiments, grafts stimulated to increase seed production tended to produce smaller cones. In experiment 2, pollen production was significantly increased after stem injections of GA4/7. The increase above the control was about 90%. There was a tendency for stem injections of GA4/7, which were intended to increase seed production, to reduce pollen production. Clonal effects were significant for all variables tested in the study. No damage to the treated grafts were observed that could be attributed to the treatment. The use of stem injections of GA4/7 as an operational means in seed orchards of P. sylvestris is therefore recommended.

Marker Trait Association for Autumn Cold Acclimation and Growth Rhythm in Pinus sylvestris

2003 ◽  
Vol 18 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Reza Yazdani ◽  
Jan-erik Nilsson ◽  
Christophe Plomion ◽  
Gaurov Mathur
Keyword(s):  
Pinus Sylvestris ◽  
Cold Acclimation ◽  
Growth Rhythm ◽  
Trait Association

Four cytosolic-type CuZn-superoxide dismutases in germinating seeds of Pinus sylvestris

1994 ◽  
Vol 92 (3) ◽  
pp. 443-450 ◽  
Author(s):  
Steffen Streller ◽  
Stanislaw Karpinski ◽  
Jan-Erik Hallgren ◽  
Gunnar Wingsle
Keyword(s):  
Pinus Sylvestris ◽  
Superoxide Dismutases ◽  
Germinating Seeds
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