scholarly journals Factors associated with the distribution and size of Adelges abietis (Homoptera: Adelgidae) galls on a sev- eral years old spruce (Picea abies) plantation

2015 ◽  
Vol 25 (4) ◽  
pp. 161-169 ◽  
Author(s):  
Sebastian Pilichowski ◽  
Damian Pazio ◽  
Marian Giertych
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Tree Crown ◽  
Factors Associated ◽  
Lateral Shoots

The eastern spruce gall adelgid (Adelges abietis) is a homopteran insect related to aphids. It forms pineapple-like pseudocone galls on Norway spruce (Picea abies) shoots, which are often deformed by them. The factors responsible for gall distribution within a tree crown are not clear. We investigated the distribution of galls in crowns on a spruce plantation. We assumed that the number and size of galls is dependent on the size of the tree, position on the crown, the type of shoot and its placement relative to the compass points. We also counted the larval chambers and related their number with gall size. We demonstrated that the largest galls are in the upper part of the crown and on the lateral shoots, and the number of chambers is closely related to the size of the galls. The level of shoot embrace has a significant impact on shoot deformation.

scholarly journals Gradients of the content of photosynthetic pigments and radiation as manifestations of the health condition of Norway spruce (Picea abies [L.] Karst.)

2012 ◽  
Vol 50 (No. 10) ◽  
pp. 489-495
Author(s):  
T. Zemánek ◽  
M. Martinková ◽  
D. Štěrbová
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Photosynthetic Pigments ◽  
Growth Retardation ◽  
Photosynthetic Apparatus ◽  
Health Condition ◽  
Spectrophotometric Analysis ◽  
Tree Crown ◽  
Sample Tree ◽  
Impaired Health

The paper deals with the health condition of sample trees of Norway spruce (Picea abies [L.] Karst.) on the basis of the distribution and quantity of chlorophyll a + b and carotenoids with respect to the gradient of radiation in the tree crown. The content of photosynthetic pigments (PhP) was determined by spectrophotometric analysis. The sample tree is situated at the Rájec nad Svitavou locality, the Drahany Upland, altitude 625 to 640 m. Within the gradient of the content of PhP in the vertical and horizontal profile of a tree, it was shown that the inner coordination of the content of PhP in the crown in relation to the age of needles and their insolation was sufficient. Thus, the tree does not show impaired health condition and its growth retardation results from the short crown. The extent of a photosynthetic apparatus and stability of the tree would be increased particularly after elongation of the lower part of a crown, so-called compensating part.

Shoot fluctuating asymmetry: a new and objective stress index in Norway spruce (Picea abies)

2001 ◽  
Vol 31 (7) ◽  
pp. 1289-1291 ◽  
Author(s):  
Mikhail V Kozlov ◽  
Elena L Zvereva ◽  
Pekka Niemelä
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Fluctuating Asymmetry ◽  
Stress Index ◽  
First Order ◽  
The Past ◽  
Lateral Shoots ◽  
Unpolluted Site ◽  
Dense Stand ◽  
Objective Stress

We showed that difference in length of two opposite second-order lateral shoots on first-order branches of Norway spruce (Picea abies (L.) Karst.) can be classified as fluctuating asymmetry (FA). The FA was higher (i) in trees from a heavily polluted site than in trees from an unpolluted site, (ii) in shaded trees from the understorey of a dense stand than in trees from an open site, and (iii) after needle clipping (simulated herbivory). This is the first study to demonstrate that FA of woody plants can be assessed by measuring skeletal elements (branches) rather than photosynthetic organs (leaves or needles). Our finding significantly improves the possibilities to study plant developmental stability, in particular by allowing fast and accurate assessment of the past stress levels by using information stored in branch architecture. We concluded that FA based on shoot measurements is a practicable objective stress index in Norway spruce.

Nitrogen distribution in young Norway spruce (Picea abies) trees as affected by pedospheric nitrogen supply

1997 ◽  
Vol 101 (4) ◽  
pp. 764-769 ◽  
Author(s):  
Heike Stoermer ◽  
Bettina Seith ◽  
Ulrike Hanemann ◽  
Eckhard George ◽  
Heinz Rennenberg
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Nitrogen Supply ◽  
Nitrogen Distribution

Characterization of stilbenoids from the stem bark of Norway spruce (Picea abies) as antifungal agents

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
J Gabaston ◽  
T Richard ◽  
B Biais ◽  
P Waffo-Teguo ◽  
MF Corio-Costet ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Antifungal Agents ◽  
Stem Bark
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