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Source‐sink Characteristic of Photoassimilate Transport in Fertile and Sterile Plants of Chara vulgaris L. *
Author(s) -
Schulte C.,
Kirst G. O.,
Winter U.
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.tb00808.x
Subject(s) - plant stem , biology , botany , apex (geometry) , sucrose , sink (geography) , horticulture , biochemistry , cartography , geography
In cuttings of Chara vulgaris consisting of 3–4 internodal cells with whorls (branchlets) transport of photoassimilates was investigated by 14 C‐labelling. The distribution of radioactivity in different component parts of the plant was shown as percentage and calculated in relation to fresh weight. Sucrose was identified as the main transported carbohydrate. In fertile Ch. vulgaris plants, developing oogonia and antheridia were important sinks for transported carbohydrates. Polarity of transport in the internodal cells (nutrients and assimilates) remains constant, as the main characteristic, from base to apex in fertile as well as in sterile plants. In sterile plants, the branchlets being the main source for photoassimilates and the apex the sink, transport from branchlets is mainly in the direction of the internodes. In the case of fertile plants gametangia are additional sinks redirecting transport of assimilates into the branchlets.