
TY  - JOUR
A1  - Brennan, RF 
T1  - Effect of phosphorus deficiency in wheat on the infection of roots by <I>Gaeumannomyces graminis</I> var. <I>tritici</I>
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1988
VL  - 39
IS  - 4
SP  - 541
EP  - 546
KW  - 
UR  - https://doi.org/10.1071/AR9880541 
N2  - Wheat was grown in a slightly acidic grey sand at six levels of phosphorus, in the presence or absence of take-all inoculum in a glasshouse experiment. The incidence and severity of take-all was related to the phosphorus supply and the phosphorus status of wheat.Plants grown without P were more severely infected by take-all than those grown at adequate levels of phosphorus. The percentage of both nodal and seminal roots infected by take-all declined as the level of P was increased. The percentage of seminal roots infected was reduced from 35% to 13.7% by increasing the supply of phosphorus from levels severely deficient to those adequate for plant growth. Infection in nodal roots was reduced from 24% to 2.3% as the P supply increased. In both the seminal and nodal root systems, increasing the P supply decreased the length of proximal lesions (closest to seed) and increased the length of root between the crown and the proximal lesions. 
ER  -

