Aging in Pinus sylvestris L. seeds: changes in viability and lipids

2000 ◽  
Vol 28 (6) ◽  
pp. 878-879 ◽  
Author(s):  
P. Tammela ◽  
A. Hopia ◽  
R. Hiltunen ◽  
H. Vuorela ◽  
M. Nygren
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Electrolyte Leakage ◽  
World Wide ◽  
Seed Quality ◽  
Biochemical Changes ◽  
Delayed Growth

Aging of Scots pine seeds (Pinus sylvestris L.) leads to changes in seed quality, such as loss of germinability, delayed growth and abnormality in developing seedlings. The knowledge of biochemical changes responsible for these aging processes is plentiful in some seeds, which are of world-wide interest, but for pine seeds these studies are rare. The aim of the present study, was to analyse pine seeds of varying ages in order to identify biochemical changes occurring in aged pine seeds, and to see if a correlation existed between these results and traditionally used seedquality parameters, such as germinability and electrolyte leakage.

scholarly journals Penconazole Induced Heat Tolerance in Scots Pine (Pinus sylvestris) and Evergreen Oak (Quercus ilex)

2010 ◽  
Vol 36 (5) ◽  
pp. 212-220
Author(s):  
Glynn Percival ◽  
Kelly Noviss
Keyword(s):  
Heat Stress ◽  
Chlorophyll Fluorescence ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Electrolyte Leakage ◽  
Quercus Ilex ◽  
Recovery Rates ◽  
Photosynthetic System ◽  
Heat Damage ◽  
Evergreen Oak

The ability of penconazole, a triazole fungicide derivative, to protect against and ameliorate heat stress was studied in evergreen oak (Quercus ilex) and Scots pine (Pinus sylvestris). Under laboratory conditions, heat damage to the leaf photosynthetic system based on the stability of the chlorophyll a/b light-harvesting complex within photosystem II (chlorophyll fluorescence Fo responses) and leaf photochemical efficiency (chlorophyll fluorescence Fv/Fm emissions) of detached leaves was constantly less in penconazole treated trees. In both species, greatest protection of the leaf photosynthetic system to heat induced disorders was achieved by application of penconazole at a concentration of 30 g per liter of water compared to penconazole applied at a concentration of 0.15 or 0.45 g per liter of water. Subjecting containerized trees of both species to 10 minutes at 50°C significantly reduced tree vitality with respect to chlorophyll fluorescence Fo and Fv/ Fm emissions, total foliar chlorophylls, leaf photosynthetic rates (Pn) and significantly increased damage to cellular membrane integrity as manifest by higher leaf electrolyte leakage and visual leaf necrosis between stressed and non-heat stressed well-watered trees. The influence of penconazole applied immediately after heat stress on the pattern of recovery over the following twelve weeks demonstrated penconazole treated trees were the most capable of recovery. With respect to chlorophyll fluorescence Fo and leaf electrolyte leakage values recovery rates of heat damaged trees treated with penconazole ranged from 20%–50% higher than non-triazole treated control trees. In all cases nonpenconazole treated control trees had the least capacity for recovery. Regardless of species, height, leaf area, root, shoot, and total plant dry weight were, in virtually all instances, greater than non-penconazole treated controls. The tactical use of the triazole derivative penconazole as an ameliorant against heat damage and recovery from heat stress in Scots pine and evergreen oak would be of benefit to improve tree recovery rates and growth. From a practical point of view penconazole at 30 g a.i. per liter of water is suggested based on the results of this study.

scholarly journals Effect of Prunus serotina Ehrh. Volatile Compounds on Germination and Seedling Growth of Pinus sylvestris L.

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 846
Author(s):  
Aleksandra Halarewicz ◽  
Antoni Szumny ◽  
Paulina Bączek
Keyword(s):  
Pinus Sylvestris ◽  
Volatile Compounds ◽  
Scots Pine ◽  
Prunus Serotina ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Fraction ◽  
Black Cherry ◽  
Allelopathic Potential ◽  
Pine Seedlings ◽  
Phytotoxic Effect

In temperate European forests invaded by Prunus serotina Ehrh. (black cherry), a reduction in the spontaneous regeneration capacity of Pinus sylvestris L. (Scots pine) is observed. It could be caused by various factors, including allelopathic properties of this invasive plant. In this study the phytotoxic effect of P. serotina volatile compounds on P. sylvestris and the seasonal variation in this effect were assessed. Simple assays showed that volatiles emitted from P. serotina leaves significantly inhibited root growth of P. sylvestris seedlings. Their negative effect on stem growth was much weaker. The strongest phytotoxic effect on Scots pine seedlings was caused by the volatiles emitted from the youngest black cherry leaves. In fresh foliage of P. serotina, nineteen volatile organic compounds were identified by gas chromatography–mass spectrometry (GC–MS). The dominant compound was benzaldehyde. On the basis of tests of linalool alone, it was found that this monoterpene present in the volatile fraction has a strong allelopathic potential and inhibits germination, root elongation and shoot elongation of pine seedlings. The results of our research suggest that volatile compounds from P. serotina leaves could limited survival of P. sylvestris individuals in the seedling phase.

scholarly journals Location, but not defensive genotype, determines ectomycorrhizal community composition in Scots pine ( Pinus sylvestris L.) seedlings

2021 ◽  
Author(s):  
Jim Downie ◽  
Andy F. S. Taylor ◽  
Glenn Iason ◽  
Ben Moore ◽  
Jonathan Silvertown ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Community Composition ◽  
Scots Pine ◽  
Ectomycorrhizal Community
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