scholarly journals Production and turnover of mycorrhizal soil mycelium relate to variation in drought conditions in Mediterranean Pinus pinaster , Pinus sylvestris and Quercus ilex forests

2020 ◽  
Author(s):  
Andreas Hagenbo ◽  
Yasmine Piñuela ◽  
Carles Castaño ◽  
Juan Martínez de Aragón ◽  
Sergio de‐Miguel ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Pinus Pinaster ◽  
Quercus Ilex ◽  
Drought Conditions ◽  
Soil Mycelium

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.

Natural regeneration of Pinus pinaster facilitates Quercus ilex survival and growth under severe deer browsing pressure

2019 ◽  
Vol 432 ◽  
pp. 356-364 ◽  
Author(s):  
Alberto Maltoni ◽  
Barbara Mariotti ◽  
Andrea Tani ◽  
Sofia Martini ◽  
Douglass F. Jacobs ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Pinus Pinaster ◽  
Quercus Ilex ◽  
Deer Browsing ◽  
Survival And Growth

scholarly journals Comparative Drought Responses of Quercus ilex L. and Pinus sylvestris L. in a Montane Forest Undergoing a Vegetation Shift

Forests ◽  
2015 ◽  
Vol 6 (12) ◽  
pp. 2505-2529 ◽  
Author(s):  
David Aguadé ◽  
Rafael Poyatos ◽  
Teresa Rosas ◽  
Jordi Martínez-Vilalta
Keyword(s):  
Pinus Sylvestris ◽  
Quercus Ilex ◽  
Montane Forest ◽  
Vegetation Shift

Somatic embryogenesis and plantlet development in Pinus sylvestris and Pinus pinaster on medium with and without growth regulators

1999 ◽  
Vol 105 (4) ◽  
pp. 719-728 ◽  
Author(s):  
Marie-Anne Lelu ◽  
Catherine Bastien ◽  
Aurélie Drugeault ◽  
Marie-Laure Gouez ◽  
Krystyna Klimaszewska
Keyword(s):  
Somatic Embryogenesis ◽  
Pinus Sylvestris ◽  
Growth Regulators ◽  
Pinus Pinaster
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