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ABSORPTION OF RADIO–ACTIVE PHOSPHORUS FROM TAP–AND NODAL ROOTS OF WHITE CLOVER ( TRIFOLIUM REPENS L.)
Author(s) -
Ueno M.,
Williams R. Dorrington
Publication year - 1967
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1967.tb00521.x
Subject(s) - trifolium repens , chromosomal translocation , taproot , nodal , tap water , biology , root system , agronomy , botany , anatomy , environmental science , gene , biochemistry , environmental engineering
Absorption by the tap‐root and by different nodal roots of white clover S100 and translocation of 32 P were investigated to find to what extent nodal roots can compensate for the absence of a tap‐root. 32 P absorbed from the tap‐root was distributed evenly within the whole plant. When translocation from the 2nd and 7th nodal roots was studied, similar distribution was obtained only from the nodal root closer to the centre of the plant. The backward movement of 32 P absorbed from nodal roots at the base of the plant increased as the root size increased. Removal of tap‐roots resulted in temporary depression of translocation; its effect disappeared within 3 weeks. It is concluded that the ability of nodal roots to compensate for loss of the tap‐root depends on their position and size.