Conductance of needle and twig axis phloem of damaged and intact Norway spruce (Picea abies (L.) Karst.) as investigated by application of14C in situ

Trees ◽  
1987 ◽  
Vol 1 (4) ◽  
pp. 207-214 ◽  
Author(s):  
Ursula Kuhn ◽  
Erwin Beck
Keyword(s):  
Picea Abies ◽  
Norway Spruce

Observations on an introduced bud scale, Physokermes hemicryphus (Homoptera: Coccidae), infesting Norway spruce in Idaho

2004 ◽  
Vol 34 (6) ◽  
pp. 1348-1352 ◽  
Author(s):  
Malcolm M Furniss
Keyword(s):  
North America ◽  
Picea Abies ◽  
Norway Spruce ◽  
First Instar ◽  
The Dead ◽  
Lateral Branches

An introduced bud scale on Norway spruce (Picea abies (L.) Karst. (Pinaceae)) in Idaho, formerly thought to be Physokermes piceae Schrank (Homoptera: Coccidae), is identified as Physokermes hemicryphus (Dalman). Secondary lateral branches of infested Norway spruce become pendent as a result of growing abnormally in length relative to diameter. The scale reproduces by parthenogenesis in North America; no male is known there. Mature females in situ resemble a branch bud. An average of 2.2 females occurred per infested node. They grew larger in late May, at which time they protruded visibly from beneath branch bud scales of the previous year and became immersed in their secreted honeydew. At maturity, females contained a prolific number of eggs (290–858). The eggs hatched into nymphs within the rigid exoskeleton of the dead female in late June. Nymphs emerged during July and migrated distally along a branch. They overwintered as second (final) instars attached to needles or beneath bud scales at the branch node from which the current-year terminal emanated. Four species of hymenopterous parasites were reared from adult scales. Of these, Americencyrtus sp. (Hymenoptera: Encyrtidae) was most abundant. It parasitized a majority of first instar nymphs but allowed them to develop to maturity the following spring before destroying their embryonic eggs and emerging in synchrony with appearance of nymphs of unparasitized females.

Mechanical behaviour of chemically modified Norway spruce (Picea abies L. Karst.): Experimental mechanical studies on spruce wood after methacrylation and in situ polymerization of styrene

2019 ◽  
Vol 53 (2) ◽  
pp. 425-445 ◽  
Author(s):  
Samuel Oluyinka Olaniran ◽  
Benjamin Michen ◽  
Diego F. Mora Mendez ◽  
Falk K. Wittel ◽  
Erik Valentine Bachtiar ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Mechanical Behaviour ◽  
In Situ Polymerization ◽  
Chemically Modified ◽  
Spruce Wood ◽  
Mechanical Studies

Identification of endophytic hyphae of Lophodermium piceae in tissues of green, symptomless Norway spruce needles by immunoelectron microscopy

1989 ◽  
Vol 67 (6) ◽  
pp. 1768-1774 ◽  
Author(s):  
Jürgen Suske ◽  
Georg Acker
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Endophytic Fungi ◽  
Cross Reactivity ◽  
Immunogold Labeling ◽  
Fungal Isolates ◽  
Hyphal Sheath ◽  
Spruce Needles

Antiserum specific for Lophodermium piceae hyphae was obtained by absorbing a rabbit L. piceae antiserum with hyphal material of different fungal isolates. The specificity of this absorbed antiserum was tested with hyphae of endophytic fungi isolated from green, asymptomatic needles of Norway spruce (Picea abies Karst.) using the on-section immunogold labeling technique. With this specific, absorbed antiserum, a homogenous labeling was obtained with cultured hyphae of L. piceae, whereas all other spruce needle endophytes examined remained practically unlabeled. Insignificant cross-reactivity was also observed with needle tissues. The absorbed antiserum was then applied for the immunoelectron microscopical identification of L. piceae hyphae in situ in infected tissues of green, asymptomatic Norway spruce needles. The function of papillalike structures observed in infected needle mesophyll as well as the role of the hyphal sheath surrounding endophytic L. piceae hyphae are discussed in connection with the interaction between L. piceae and asymptomatic Norway spruce needles.

Mycorrhiza formation on Norway spruce (Picea abies) roots affects the pathway of anaplerotic CO2 fixation

1996 ◽  
Vol 96 (4) ◽  
pp. 699-705 ◽  
Author(s):  
Astrid Wingler ◽  
Thomas Wallenda ◽  
Rudiger Hampp
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Co2 Fixation ◽  
Mycorrhiza Formation

Storage protein accumulation during zygotic and somatic embryo development in Picea abies (Norway spruce)

1990 ◽  
Vol 80 (3) ◽  
pp. 441-445 ◽  
Author(s):  
Inger Hakman ◽  
Priska Stahel ◽  
Peter Engstrom ◽  
Tage Eriksson
Keyword(s):  
Picea Abies ◽  
Somatic Embryo ◽  
Norway Spruce ◽  
Embryo Development ◽  
Storage Protein ◽  
Protein Accumulation ◽  
Somatic Embryo Development

Metabolism of nitrate and ammonium in seedlings of Norway spruce (Picea abies) measured by in vivo 14N and 15N NMR spectroscopy

1995 ◽  
Vol 94 (3) ◽  
pp. 384-390 ◽  
Author(s):  
Halvor Aarnes ◽  
Aud B. Eriksen ◽  
Timothy E. Southon
Keyword(s):  
Nmr Spectroscopy ◽  
Picea Abies ◽  
Norway Spruce ◽  
15N Nmr ◽  
15N Nmr Spectroscopy

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

Optimization of transient gene expression in pollen of Norway spruce (Picea abies) by particle acceleration

1994 ◽  
Vol 92 (3) ◽  
pp. 412-416 ◽  
Author(s):  
Inger Martinussen ◽  
Olavi Junttila ◽  
David Twell
Keyword(s):  
Gene Expression ◽  
Particle Acceleration ◽  
Picea Abies ◽  
Norway Spruce ◽  
Transient Gene Expression

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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