scholarly journals Effect of irrigation on needle morphology, shoot and stem growth in a drought-exposed Pinus sylvestris forest

2010 ◽  
Vol 30 (3) ◽  
pp. 346-360 ◽  
Author(s):  
M. Dobbertin ◽  
B. Eilmann ◽  
P. Bleuler ◽  
A. Giuggiola ◽  
E. Graf Pannatier ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Stem Growth ◽  
Needle Morphology

Stem-growth response of Pinus sylvestris and Picea abies to nitrogen fertilization as related to needle nitrogen concentration

Trees ◽  
1998 ◽  
Vol 12 (4) ◽  
pp. 208-214 ◽  
Author(s):  
U. Sikström ◽  
Hans-Örjan Nohrstedt ◽  
Folke Pettersson ◽  
Staffan Jacobson
Keyword(s):  
Picea Abies ◽  
Pinus Sylvestris ◽  
Nitrogen Fertilization ◽  
Growth Response ◽  
Nitrogen Concentration ◽  
Stem Growth

Unrevealing tree carbon allocation beyond the stress – a case study of heat and drought impacts on Pinus sylvestris

2020 ◽  
Author(s):  
Romy Rehschuh ◽  
Andreas Gast ◽  
Andrea-Livia Jakab ◽  
Marco Lehmann ◽  
Matthias Saurer ◽  
...  
Keyword(s):  
Drought Stress ◽  
Gas Exchange ◽  
Pinus Sylvestris ◽  
Stem Growth ◽  
Water Soluble ◽  
Pulse Labelling ◽  
Stress Release ◽  
C Storage ◽  
Heat Treated ◽  
Post Stress

<p>The resistance of trees to stress events has been studied intensively, however we know little on underlying processes affecting the recovery of trees following stress release. Hence, this clearly impairs our ability to project the resilience of trees and forests to an intensification of heatwaves and drought spells.</p><p>Here we studied the legacy effects of heat and heat-drought stress on carbon (C) allocation dynamics in Scots pine. We were particularly interested in how C allocation changes post heat and heat-drought stress and how this change in allocation affects tree growth. We exposed Pinus sylvestris seedlings to increasing temperatures from 30 to 40°C within 18 days either under well-watered or drought conditions and measured stem growth, leaf water potential and above- and belowground gas exchange. Two days after stress release, we conducted a <sup>13</sup>CO<sub>2</sub> pulse-labelling experiment in custom build single tree cuvettes (n=18) allowing us to continuously monitor <sup>13</sup>CO<sub>2</sub> shoot and root gas exchange. We then chased the fate of the newly assimilated C from leaves to roots via soluble sugars, starch and cellulose.</p><p>Our results showed that Pinus sylvestris is able to recover gas exchange following heat release immediately in the well-watered trees, while drought-treated trees recovered slightly slower. We found indications for a stress compensatory response of the previously heat-treated trees, which tended to translocate recent assimilates faster compared to the control trees as identified in the dynamics of water-soluble carbon in the phloem and root <sup>13</sup>CO<sub>2</sub> efflux. In addition, we found larger stem growth rates in the heat-treated trees which was also reflected by a larger investment of new assimilates to cellulose. In the trees that experienced both, heat and drought stress, C allocation differed strongly from the control trees as apparent in a half as fast C translocation from leaves to root respiration and large investments of new assimilates into starch. This delayed translocation but enhanced allocation towards C storage in needle tissues was reflected in a delayed recovery of stem growth and very low detection of the <sup>13</sup>C signal in twig, root and stem cellulose. We can conclude that heatwaves of 40°C have relatively moderate responses on C allocation post-stress, whereas hot drought stress clearly affects C allocation as indicated by a delayed C transport capacity and a preferential allocation towards C storage in needle tissues. This could indicate that C allocation following hot drought stress is affected by an impaired phloem functionality, which only slowly recovers post-stress.</p>

scholarly journals Are There Any Traces of Pinus uliginosa in the Stołowe Mountains Outside the Wielkie Torfowisko Batorowskie and Błędne Skały?

2021 ◽  
Vol 90 ◽  
Author(s):  
Krystyna Boratyńska ◽  
Zbigniew Gołąb ◽  
Bartosz Łabiszak ◽  
Wioletta Niemczyk ◽  
Karolina Irena Sobierajska ◽  
...  
Keyword(s):  
Gene Flow ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Morphological Differentiation ◽  
The Other ◽  
Biometric Data ◽  
Mitochondrial Markers ◽  
Needle Morphology ◽  
Pinus Uliginosa ◽  
Fertile Hybrids

Abstract Pinus sylvestris (Scots pine) and taxa from the P. mugo (mountain pine) complex hybridize in contact zones producing morphologically-intermediate fertile hybrids. However, the hybrid specimens sometimes express only the P. sylvestris phenotype. Such cryptic hybrids were detected among P. sylvestris and P. uliginosa in the western part of Błędne Skały in the Stołowe Mountains, where the pines grow on the tops of sandstone rocks and phenotypically resemble P. sylvestris , P. uliginosa , and P. mugo . Hybrids with the P. sylvestris phenotype could be potentially present in other relic populations of this species in these mountains. During the present study, the hybrids were identified only in the area of Błędne Skały based on chloroplast and mitochondrial markers, morphological differentiation of various needle and cone traits, and phenotype assessments of the trees during sampling. These hybrids included three cryptic hybrids of P. sylvestris × P. mugo with the P. sylvestris phenotype and one displaying the phenotype of P. uliginosa . The other populations analyzed represented Scots pine with no evidence of hybridization with P. uliginosa and/or P. mugo . Biometric data on the cone and needle morphology also suggest possible hybridization within the P. mugo complex on Błędne Skały. The results indicate that hybridization takes place in this population but not in neighboring populations despite the possible connection by pollen-mediated gene flow.

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
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