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Seasonal Changes in the Cambium of Trees. I. Sucrose Content in Thuja occidentalis
Author(s) -
Krabel Doris,
Bodson Monique,
Eschrich W.
Publication year - 1994
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1994.tb00408.x
Subject(s) - cambium , phloem , xylem , vascular cambium , sucrose , botany , parenchyma , thuja , biology , horticulture , biochemistry
Cambium samples of Thuja occidentalis L. were collected at five different times, covering spring reactivation and early and late resting period, and used for sucrose determinations. Fragments of the different cell types ‐ xylem ray, cambial initials, sieve‐elements including phloem parenchyma cells, phloem ray ‐ were dissected from freeze‐dried radial sections and analyzed individually. Results show large differences in sucrose concentrations in the different cell types of the cambial layer. In addition, each cell type also shows seasonal fluctuations in sucrose content, whose amplitudes and patterns of variation appear specific for the particular cell type.