Wood  - Wood is a highly ordered connection and arrangement of living, dying and dead cells that have walls of cellulose, hemicelluloses and lignin.  Wood is an organ.  Wood is secondary xylem where some cell walls become thickened and heavily lignified.  Once the lignification takes place of the xylem, then the material is correctly called wood.  Thus, the cambium zone produces xylem and not wood.  Wood is like a battery.  Wood itself is a form of stored energy for other organisms because cellulose is made up of long twisting chains of glucose - sugar.  Soils and wood share a common problem:  They are thought of as dead substances.  This has come about because wood-products research gained an early lead over research on wood in living trees. With soils, many texts still define soils as loose material of weathered rock and other minerals, and also partly decayed organic matter that covers large parts of the land surface on Earth."  Wood was a living material before it became a violin.  Think for a moment of all the words we have to describe wood: sap, heart, wet, early, late, discolored, black, green, red, rose, soft, hard, spring, summer, dotty, fat, lighter, tension, compression, pulp, burl, root, trunk, branch, petrified, blue-stained, false heart, wound, round, violin, instrument, ring-porous, diffuse-porous, juvenile, sandal, ripe, tallow, brashy, composite, and the list probably goes on.  For starters, symplastless wood, as in coarse woody debris, with soil contact, can be a water, nutrient and essential element reservoir for flora and fauna.  Important during dryer times.  It provides habitat, substrate for the base of the food web and buffers soils.  It reduces soil erosion and protects certain fauna and flora from abiotic forces and biotic agents.  Wood plays a unique key role is the health and function of a constantly changing system both in fields and forest.  Remember these systems, forest and fields, are like a spiders web.  Its hard to touch any one part of the system without effecting the whole web. 
    In other words.  Wood is a tree organ made of highly ordered cell arrangements where the cell walls are made of cellulose, hemicelluloses, and lignin.  The cell types are in all gradations from living to dead, and the different cell types have different functions for liquid transport, mechanical support and living substances and storage. 
    In other words.  Wood is an organ.  It’s made up of many different types of cells.  But they are highly arranged.  The walls made of cellulose, hemicelluloses, and lignin.  Some have lots, some have less and some have very little.  There in all gradations of living, dying and dead.  They all have different functions.  But it is a highly ordered arrangement.  Dr. Shigo published a dictionary back in 1986.  A dictionary of many terms.  So if you are really interested in learning about trees he has published at least 30 other books. Almost two million copies of the booklets are now in use.  We hope they are in use.  They are in 16 different languages which he has given copy writes too.  There are people out there, bless you, there are thinkers out there, but we need more.  Think about all of this please.  This is a plea, because somebody needs to help the trees.  We know we have many brave people out there.  They make it possible for us to stay alive.  We thank you and we thank them.  Just keep thinking ok.  Keep thinking, please. 

For wood types click here.

Link to Dr. Shigo’s Dictionary.

Other scientific materials by Dr. Shigo

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