Anatomy of Flowering PlantsHard

Question

Which exposed wood will decay faster ?

Options

A.Sapwood
B.Softwood
C.Wood with lot of fibres
D.Heartwood

Solution

In old trees, seconary xylem or wood gets differentiated into outer light coloured functional sapwood or alburnum and inner dark coloured non- functional heartwood or duramen. Heart wood is stronger and highly durable because of presence of oils, resins, gums, tannins and tyloses which are plugged into the tracheids and vessel elements. As the secondary groeth takes place size of heart wood increases because of conversion of inner alburnum (sapwood) into it .

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