Results 161 to 170 of about 40,853 (208)

Stable Transformation of Picea glauca by Particle Acceleration

Nature Biotechnology, 1993
By defining the somatic embryo developmental stage which expressed β-glucuronidase (GUS) at a high level yet was also competent to form embryogenic callus at a high frequency under selection, we obtained transformed Picea glauca (white spruce) embryogenic callus, embryos and seedlings expressing GUS in all cells.
D. D. Ellis, D. E. McCabe, S. McInnis, R. Ramachandran, D. R. Russell, K. M. Wallace, B. J. Martinell, D. R. Roberts, K. F. Raffa, B. H. McCown   +9 more
openaire   +1 more source

Effect of a Rugulosin-producing Endophyte in Picea glauca on Choristoneura fumiferana

Journal of Chemical Ecology, 2008
Disease-free second instar Choristoneura fumiferana (eastern spruce budworm) were placed on trees infected with a rugulosin-producing needle endophyte in two experiments. They were allowed to grow to sixth instar when survivors were collected. First, by using 3-yr old trees, a comparison was made of budworm growth on infected and uninfected trees.
J David, Miller, Mark W, Sumarah, Gregory W, Adams   +2 more
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Potassium deficiency causes injuries to picea pungens glauca in nurseries

Plant and Soil, 1993
For many years a widespread disorder has occured with Picea pungens glauca in nurseries near Hamburg, with chlorotic and sometimes necrotic needles at the tip of current shoots. From a survey investigation, a pot trial and a field trial it was concluded that K deficiency was the cause of the disorder, and that it was probably aggravated by oversupply ...
D. Alt, S. Jacob, N. Rau, R. Wirth
openaire   +1 more source

An embryogenic cell suspension culture of Picea glauca (White spruce)

Plant Cell Reports, 1987
A cell suspension culture of Picea glauca (White spruce) which continuously produces somatic embryos has been established. Embryogenic callus derived from cultured zygotic embryos was used to initiate the culture. Numerous embryos at various early stages of development were recognized; they exhibited a meristematic embryonic region and suspensor ...
I, Hakman, L C, Fowke
openaire   +2 more sources

Spread and persistence of a rugulosin-producing endophyte in Picea glauca seedlings

Mycological Research, 2008
We have studied Picea glauca (white spruce) endophyte colonization and its affect on the growth of Choristoneura fumiferana (spruce budworm). Here we examine the spread and persistence of a rugulosin-producing endophyte and rugulosin in needles from trees maintained in the nursery, as well as in trees planted in a test field site.
Mark W, Sumarah, Gregory W, Adams, Joanne, Berghout, Gregory J, Slack, Aaron M, Wilson, J David, Miller   +5 more
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Polyamine biosynthesis during somatic embryogenesis in interior spruce (Picea glauca�Picea engelmannii complex)

Plant Cell Reports, 1996
Putrescine, spermidine, and spermine levels during somatic embryogenesis of interior spruce (Picea glauca x Picea engelmannii complex) were quantified On abscisic acid supplemented growth medium putrescine and spermidine levels increased two-fold coinciding with maturation of the early somatic embryos to globular embryos.
V, Amarasinghe, R, Dhami, J E, Carlson
openaire   +2 more sources

THE STRUCTURE AND DEVELOPMENT OF A WOODY TUMOR AFFECTING PICEA GLAUCA

American Journal of Botany, 1954
BECAUSE OF its unusual distribution and the light which may possibly be thrown on the general problem of tumor etiology a woody tumor (fig. 2, 3) occurring inepiphytotic numbers on Mt. -Desert Island, Maine, h'as been un,der investigation in this Laboratory for some years.
White, P R, Millington, W F
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SOME ASPECTS OF DIFFERENTIATION IN CELLS OF PICEA GLAUCA CULTIVATED IN VITRO

American Journal of Botany, 1967
Microscopic observation of cells of Picea glauca , grown in tissue culture under a variety of cultural conditions, reveals a series of phenomena which are believed to be associated with the development of specific types of cells recognizable in intact plants.
openaire   +2 more sources

Proteome analysis of early somatic embryogenesis in Picea glauca

PROTEOMICS, 2005
AbstractForestry is a valuable natural resource for many countries. Rapid production of large quantities of genetically improved and uniform seedlings for restocking harvested lands is a key component of sustainable forest management programs. Clonal propagation through somatic embryogenesis has the potential to meet this need in conifers and can offer
Dustin, Lippert, Jun, Zhuang, Steven, Ralph, Dave E, Ellis, Margarita, Gilbert, Robert, Olafson, Kermit, Ritland, Brian, Ellis, Carl J, Douglas, Jörg, Bohlmann   +9 more
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Characterization of Polyketide Metabolites from Foliar Endophytes of Picea glauca

Journal of Natural Products, 2008
A collection of 250 foliar endophytes of Picea glauca (white spruce) yielded several isolates that produced metabolites toxic to Choristoneura fumiferana (spruce budworm). Three of these strains were selected for further study based on their ability to be cultured and produce secondary metabolites under laboratory conditions.
Mark W, Sumarah, Eva, Puniani, Barbara A, Blackwell, J David, Miller   +3 more
openaire   +2 more sources