Results 241 to 250 of about 12,314 (297)
Some of the next articles are maybe not open access.

An Early Devonian actinostelic euphyllophyte with secondary growth from the Emsian of Gaspé (Canada) and the importance of tracheid wall thickening patterns in early euphyllophyte systematics

Papers in Palaeontology, 2020
Secondary growth is a tracheophyte structural feature whose earliest known occurrence dates to the late Pragian – early Emsian. Armoricaphyton, Franhueberia and an unnamed plant from eastern Canada represent the only instances of secondary growth ...
Kelly C. Pfeiler, A. Tomescu
semanticscholar   +1 more source

How does water flow from vessel to vessel? Further investigation of the tracheid bridge concept.

Tree Physiology, 2019
Hydraulic safety and efficiency have become the central concept of the interpretation of the structure and function of vessels and their interconnections.
Ruihua Pan, M. Tyree
semanticscholar   +1 more source

Involvement of VNS NAC-domain transcription factors in tracheid formation in Pinus taeda.

Tree Physiology, 2019
Vascular plants have two types of water-conducting cells, xylem vessel cells (in angiosperms) and tracheid cells (in ferns and gymnosperms). These cells are commonly characterized by secondary cell wall (SCW) formation and programmed cell death (PCD ...
Nobuhiro Akiyoshi   +5 more
semanticscholar   +1 more source

Oldest recorded in situ tracheids

Nature, 1976
RECENT critical reviews1 have suggested that evidence from microfossils2 (that is spores with triradiate marks, sheets of “cells” or tubes with tracheid-like thickenings) should not be considered sufficient to demonstrate the existence of vascular plants in Silurian times; the only acceptable evidence being megafossils with tracheids in situ.
D. EDWARDS, E. C. W. DAVIES
openaire   +1 more source

TRACHEID EFFECT SCANNING AND EVALUATION OF IN-PLANE AND OUT-OF-PLANE FIBER DIRECTION IN NORWAY SPRUCE TIMBER

Wood and Fiber Science, 2018
Local fi ber direction is decisive for both strength and stiffness in timber. In-plane fi ber direction on surfaces of timber can be determined using the so-called tracheid effect which is frequently used in both research and industry applications ...
Andreas Briggert   +3 more
semanticscholar   +1 more source

Transverse dimensions of softwood tracheids

Feddes Repertorium, 1992
AbstractFor 130 years transverse dimensions of softwood tracheids have been the subject of study. Selected references show that diameter and wall thickness of the cells have been more thoroughly studied than lumen diameter. An attempt was made to correlate these three anatomical parameters among each of them and with wood density in 15 coniferous tree ...
G. Schultze-Dewitz, H. Götze
openaire   +1 more source

Tracheid Structure in a Primitive Extant Plant Provides an Evolutionary Link to Earliest Fossil Tracheids

International Journal of Plant Sciences, 1998
Most attempts to understand the early evolution of tracheids have centered on fossil Silurian and Devonian vascular plants, and these efforts have led to a wealth of new information on early water‐conducting cells. All of these early tracheids appear to possess secondary cell wall thickenings composed of two distinct layers: a layer adjacent to the ...
Martha E. Cook, William E. Friedman
openaire   +2 more sources

A tracheid-differentiation factor from pine needles

Planta, 1981
Exogenous indol-3yl-acetic acid (IAA), alone and together with several cytokinins, was ineffective in promoting the complete differentiation into tracheids of cambial derivatives of Pinus contorta Dougl.; IAA alone promoted cambial cell division and primary-wall growth in cambial derivatives throughout the stem's length.
R A, Savidge, P F, Wareing
openaire   +2 more sources

Home - About - Disclaimer - Privacy