what are the different kinds of secondary woods found in gymnosperms?
Answers
The wood of gymnosperms is simpler and more homogeneous than that of angiosperms. Except for the species of the order Gnetales, tracheids are the only conducting elements in gymnosperms. The most important insights into the structure and formation of pine wood that is always regarded as the prototype of gymnosperm wood stem from the German KARL SANIO (1832-1891). His observations were completed by the studies of the American botanist I. W. BAILEY (1954). SANIO assumed (1872/73) that "... the bast (phloem) and wood cells of one radial row develop from a single cell of the cambium by alternate divisions". This observation is one of the first and most important concerning the cambium's impact on secondary growth. The processes within angiosperm wood are in principal the same, but it was at first by no means simple to recognize the logical connection. Pinus silvestris or related species like the North American white pine (Pinus strobus) turned out to be ideal specimens. Pine wood is a typical object of every botanical ground course. Since cells and tissues are three-dimensional objects, they do have to be regarded from three sides to get an impression of their spatial organization:
cross-section
radial longitudinal section
tangential section.
These three perspectives can be combined in a diagram. For some years now, scanning electron microscopy has been used in the examination of the three-dimensional structure of wood.
The maybe best-known property of gymnosperm- and angiosperm wood beside the annual rings is the grain, that is visible especially nicely in tangential sections. The veneers often used in the fabrication of furniture are made from such sections.
Answer:
The secondary wood found in gymnosperm are the soft woods mostly.
Explanation:
There are 2 different types of wood found they are the hard wood and the soft wood, the gymnosperms contain the soft woods that usually lacks a vessels, they just have tracheid’s as their conducting elements.
This softwood is later divided into the heart wood and the sapwood. The sapwood is an active tissue whereas the heartwood is an inactive tissue that is found.