
TY  - JOUR
A1  - Lamont, B 
T1  - The Effect of Soil Nutrients on the Production of Proteoid Roots by <I>Hakea</i> Species
JF  - Australian Journal of Botany
JO  - Aust. J. Bot.
Y1  - 1972
VL  - 20
IS  - 1
SP  - 27
EP  - 40
KW  - 
UR  - https://doi.org/10.1071/BT9720027 
N2  - The mode of the proteoid root response curve occurs at a considerably lower level of nitrogen or phosphorus than that of the response curve for non-proteoid roots. As a consequence, the relationship between proteoid and non-proteoid roots can be regarded as passing through four phases as nutrient availability increases: (a) an increase in proteoid root production as non-proteoid root growth increases; (b) a decrease in proteoid root production as non-proteoid root growth increases; (c) a decrease in proteoid root production as non-proteoid root growth decreases; (d) an absence of proteoid roots as non-proteoid root growth decreases. Only the first two phases are considered relevant to plants growing under field conditions. It is concluded that nutrient concentration in a number of soils, especially nitrogen availability, largely determines the relative contribution of proteoid roots to the root systems of two species of Hakea. 
ER  -

