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Translocation of Labelled Sucrose from Selected Cotton Leaves 1
Author(s) -
Sabbe Wayne E.,
Cathey George W.
Publication year - 1969
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1969.00021962006100030030x
Subject(s) - chromosomal translocation , sucrose , gossypium hirsutum , osmotic pressure , nutrient , biology , sink (geography) , agronomy , botany , horticulture , food science , biochemistry , gene , ecology , cartography , geography
Studies were made to determine the movement of metabolic‐ 14 C from sucrose during flowering and fruiting of the cotton ( Gossypium hirsutum ) plant. The translocation and sinks were studied by using radioactive 14 Csucrose applied at various locations on the plant and at various stages of plant development. Label from 14 C‐sucrose was found to translocate from fruiting branches to roots of cotton plants before young bolls were initiated. However, upon initiation of bolls the roots did not continue as a major sink. At the time of first flower the label showed a tendency to translocate to regions of rapid growth (i.e., young bolls) both above and below the treated branch. There was a tendency for the fruiting branch more nearly in vertical alignment with the treated branch to receive a larger quantity of translocate than branches on the opposite side of the stem. When the osmotic pressure of the liquid nutrient culture was increased, the 24 C‐label showed a tendency toward downward translocation during the flowering stage of the plant development. The radioactivity of the roots increased when the osmotic pressure of the nutrient solution was increased.