Anatomical studies of Pinus ponderosa Laws

Anatomical studies of Pinus ponderosa Laws by Felicia Pietrykowski Wirtz Download PDF EPUB FB2

Pine needle blight of Pinus ponderosa Laws. caused by Elytroderma deformans (Weir) Darker is recognized by changes in the needles, in the bark and in the development of the branches.

Anatomical studies of the host-parasite relation have been made previously on young pine tissue up to four years of age but not on older by: 1. Abstract. Graduation date: Pine needle blight of Pinus ponderosa Laws.

caused by\ud Elytroderma deformans (Weir) Darker is recognized by changes in\ud the needles, in the bark and in the development of the branches.\ud Anatomical studies of the host-parasite relation have been made previously\ud on young pine tissue up to four years of age but not on older\ud tissues.

Pinus ponderosa Dougl. ex Laws. Ponderosa Pine. Pinaceae -- Pine family. William W. Oliver and Russell A. Ryker. Ponderosa pine (Pinus ponderosa), also called western yellow pine, is one of the most widely distributed pines in western North America.A major source of timber, ponderosa pine forests are also important as wildlife habitat, for recreational use, and for esthetic values.

Information is given on synonyms, common names, botany, distribution and habitat, flowering and fruiting phenology, collection and yield of fruits, processing of fruits and seeds, seed quality, germination and storage, nursery management, and phytosanitary problems of Pinus by: Studies conducted on ponderosa pine (Pinus ponderosa Dougl.

ex Laws) reported intraspecific variation for anatomical and physiological traits such as stomatal density [SD (stomata/ mm2)] and gas exchange (Cregg,).

According to Jones (), features of leaf surface anatomy are a. Pinus ponderosa Laws. Western Yellow Pine. A tree occasionally over ft in the wild, with a perfectly erect, columnar trunk sometimes 8 ft thick, and comparatively short, often deflexed branches, forming a columnar or slenderly tapered head; bark of mature trees cinnamon or pinkish brown, divided into very large scaly plates; young shoots shining, reddish brown, glabrous, smelling of.

This study examines several aspects of nitrogen fixation by Purshia tridentata (Pursh) D.C., a rosaceous shrub widespread in the central Oregon pumice region, especially as an understory species in.

The distribution of air in the intercellular spaces of pine (Pinus ponderosa Laws) leaves was. studied by sectioning the needles under water to trap the air and examining the sections micro. scopically. Air was present in the intercellular spaces of the chlorenchyma, including the in.

vaginations of armed parenchyma cells. (a) An anatomical study of the xylem resin ducts of phenotypically resistant ponderosa pines (Pinus ponderosa Laws.) has been made by the Rocky Mountain Forest and Range Experiment Station; the results should be available soon. 57 (b) A plan has been proposed to study the more inclusive subject of the resistance of ponderosa pine to this beetle.

Jutte, S.M. & Levy, J.F. — Compression wood in Pinus ponderosa Laws. – A scanning electron microscopy study W. — Studies on bark anatomy — /3: 12 Stahle, J.B.

— Callus-like tissue in Piptadeniastrum africanum (Hook.f.) Brenan — /1: 10 Timell, T.E. — Nature of the last-formed tracheids in compression wood — /4: ponderosa (Pinus ponderosa Laws.) and Jeffrey pine (Pinus jeffreyi Grev.

& Balf.)—but not sugar pine—were capable of further maturation during prolonged storage. Schubert also reported that abnormal ponderosa and Jeffrey pine seedlings were obtained most often from immature fresh seeds and that the frequency of seedling abnor. Title: Anatomical Studies of Pinus ponderosa Laws.

Infested by Elytroderma deformans (Weir) Darker Abstract approved: Dr. Frank H. Smith Pine needle blight of Pinus ponderosa Laws. caused by Elytroderma deformans (Weir) Darker is recognized by changes in the needles, in the bark and in the development of the branches. Ponderosa pine (Pinus ponderosa) is a North American pine discovered in by David Douglas near Spokane, Washington.

A few common names for the species include yellow pine, western pine, and Sierra redbark among many others. Pinus ponderosa belongs to the Plantae kingdom, Pinophyta division, Pinopsida class, Pinales order, and Pinaceae family.

pine (Pinus strobus L.) and shortleaf pine (Pinus echinata Mill.), they show the number to be two with rare exceptions.

The objective of this study was to investigate vari-ation in the number of resin canals per needle in pond pine, Pinus rigida var. serotina (Michx.) Loud., as re-lated to tree age, rate of growth, and location in the crown.

Throughout the western United States, ponderosa pine (Pinus ponderosa Dougl. ex Laws.) trees are planted exten-sively on a variety of sites in urban, suburban, and forest environments. Disturbed, compacted soils and hot, dry sites are commonly encountered.

First-year mortality of planted trees can be high under harsh conditions (Preest. African Studies American Studies Ancient Near East and Egypt Art History Asian Studies Book History and Cartography Biblical Studies Classical Studies Education Rights and Humanitarian Law of Pinus contorta and Pinus ponderosa.

The tangential diameter of the resin canals, including the epithelium, was compared to the tangential diameter. The Ecological Anatomy of Ponderosa Pine Needles Austin E.

Helmers This paper is the result of a study of the needle anatomy of ponderosa pine as influenced by differences in position on the tree as well as from trees growing in different environments.

Although there is an extensive literature on the ecological anatomy of. From acetone extracts of pine needles, collected monthly, ether and aqueous fractions were prepared. In female mice the weight of the uterus was depressed when the aqueous extract was added to the feed, and increased mortality followed ingestion of ether extract.

Extracts from needles gathered during the winter months appeared to cause more deaths than those from needles collected in summer. The study area, a ponderosa pine (Pinus ponderosae Dougl. ex P. and C. Law) dominated forest, is located within the Blacks Mountain Experimental Forest (BMEF) in northeastern California, United States, which was designated as an experimental forest in American Journal of Botany 87(12): – MORPHOLOGICAL VARIATION OF PINUS FLEXILIS (PINACEAE), A BIRD-DISPERSED PINE, ACROSS A RANGE OF ELEVATIONS1 A.

SCHOETTLE2 AND S. ROCHELLE USDA Forest Service, Rocky Mountain Research Station, West Prospect Road, Fort Collins, Colorado USA. In this paper, a model of genetic variation for ponderosa pine (P.

ponderosa var. ponderosa) is developed for the Inland Northwest of the United States. Variation among populations in the Snake and Salmon river basins (Rehfeldt a) is combined with that for the middle Columbia River system (Rehfeldt b) to produce a model of genetic varia.

I. apical dome dimensions and plastochron durationI. Anatomy, Am. J. Bot. () Johansen, D.A. Johansen, Plant Microtechnique: () Mcgraw Hill Book Company New York Margaret, Kemp Margaret, Morphological and ontogenetic studies of Torreya californica. I. The vegetative apex of the megasporangiate treeAm.

J.Description Sorption studies of ponderosa pine (Pinus ponderosa Laws.) needles and litter beds of current year cast show a shorter response time and lower equilibrium moisture contents than most other conifer needle data in the literature.