primary xylem

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On-Line Glossary: M
... formed by certain fungi. (Pl. macroconidia.) See microconidium. (16) macrocyclic. Of rusts: The two primary spore stages are present (telial with teliospores and aecial with aeciospores). (8) macroscopic. Visible ... -walled cells, each of which is viable; produced in culture and rarely in the xylem of host plants. (See sclerotium.) (Pl. microsclerotia.) (17) microscopic. Very small; seen only with ...
ppathw3.cals.cornell.edu

NYBG.org: Fusarium Wilt And Its Effect On Bananas
... , usually an injured root, it enters the root system and travels into the xylem vessels. Upon entering the xylem, the vascular system becomes infected by hyphae and fungus spores called microconidia. The ... , by a gel plug produced by the plant. “The gels have a composition similar to primary cell walls, but lack cellulose.” (Vascular Wilt Disease of Plants, Tjamos) If the initial infection ...
sciweb.nybg.org

Bamboo
... number of parenchyma cells and vascular bundles. This primary growth is due to a region of actively dividing meristematic cells called the primary thickening meristem that surrounds the apical meristem at ... to masses of heavily lignified tracheids and fibers associated with the vascular bundles. The wood (xylem) of conifers and dicot trees is composed of concentric layers of dense, lignified cells ...
waynesword.palomar.edu

Stem & Root Anatomy
... disintegrated. The xylem of flowering plants also contains numerous fibers, elongate cells with tapering ends and very thick walls. Dense masses of fiber cells is one of the primary reasons why angiosperms have harder and heavier wood than gymnosperms. This is especially true of the "ironwoods" with wood that actually sinks in water. Xylem Tracheid Xylem Vessel ...
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APSnet Education Center - Introductions to the Major Pathogen Groups - Introduction to Parasitic Flowering Plants
... in southern India and scattered occurrences in North Africa, China, and southern Europe. Its primary hosts are solanaceous crops and sunflower. Sunflower is the most important oil crop in ... strands. Other tissues called sinkers descend perpendicularly from the cortical strands into the host xylem (Figure 54). Viscaceous mistletoes are water hemiparasites, hence they manufacture at least some of ...
www.apsnet.org

APSnet Education Center - Introductory Topics - What are Fungicides?
... roots and then move upward through the plant with the transpiration stream (xylem-mobile systemic) [animation #3A]. Xylem-mobile systemics applied to leaves move throughout the leaf where deposited, ... disease management program to delay fungicide resistance development. Biochemical mode of action is the primary basis used to classify fungicides into chemical groups. A list of fungicides organized by ...
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Botany online: Supporting Tissues - Conducting Tissues
... Supporting Tissues - Conducting Tissues Supporting Tissues - Vascular Tissues Vascular Tissues The Xylem The Evolution of Xylem Elements The Phloem Vascular Bundles of Monocotyledons Vascular Bundles of Dicotyledons ... a minimum. The Collenchyma The collenchyma is the typical supporting tissue of the primary plant body and growing plant parts. Its prosenchymatous cells are living at maturity ...
www.biologie.uni-hamburg.de

Vernon I. Cheadle Student Travel Awards
... . Daniel Gladish Papers submitted for Botany 2006: "Does Vascular Cavity Formation In Pea Primary Roots Involve Programmed Cell Death?" Richard Tate - 2006, Humboldt State University, Advisor: Dr ... Michigan State University, Advisor: Dr. Frank Ewers Papers submitted for Botany 2005: "Convergence of xylem structure and function: California chaparral and South African fynbos." Cassandra Rogers - 2005, ...
www.botany.org

Katherine Esau
... before attending school. As a child, she initially attended a Mennonite primary school of 4 years. A Russian teacher taught the Russian ... tissue degeneration. It was this latter relation that provided the primary stimulus for her becoming so greatly involved in research on ... . Said she: "The large vascular bundles are collateral, and the xylem occurs on the adaxial, the phloem on the abaxial side of ...
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Abstracts
... bark. Phytopathology 75:1191-1195. Biggs, A.R. and J. Northover. 1985. Formation of the primary protective layer and phellogen following leaf abscission in peach. Can. J. Bot. 63:1547-1550 ... -1610. Biggs, A.R. 1987. Occurrence and location of suberin in wound reaction zones in xylem of seventeen tree species. Phytopathology 77:718-725. Rittinger, P.A., A.R. Biggs, and ...
www.caf.wvu.edu

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