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SITES OF CALLUS PRODUCTION IN PRIMARY EXPLANTS OF SPRUCE TISSUE
Author(s) -
White Philip R.
Publication year - 1967
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1967.tb10733.x
Subject(s) - cambium , phloem , pith , biology , xylem , callus , parenchyma , botany , vascular cambium , bark (sound) , explant culture , ecology , in vitro , biochemistry
When explants for tissue cultures taken from mature spruce trees, consisting only of xylem‐cambium‐phloem without pith or cortex, are placed on nutrient agar, callus forms first from the cambium, then from phloem parenchyma, and finally from the lining of xylem resin ducts. The proliferating cells of the phloem are the tannin cells which in situ give rise to sclereids in the bark.