Table 6: Intracellular and extracellular acid phosphatase activities in leaves and roots of oat (Avena sativa L.) plants cultured 3 weeks on phosphate-sufficient (+P) or phosphate-deficient (-P) nutrient medium. Means ± SD.

Parameters 7 days 14 days 21 days
+P -P +P -P +P -P
(μmol g-1 FW h-1)
Leaf Acid Phosphatases 124 ± 8.4 125 ± 13.5 166 ± 12.8 157 ± 18 154 ± 21.2 234 ± 15.7*
Root Intracellular
Acid Phosphatases 		40.1 ± 8 47.3 ± 4.2* 81.4 ± 14.3 91.9 ± 16 87 ± 15.3 124 ± 5.4*
Extracellular
Acid Phosphatase:
Intact Root 		19.4 ± 5.2 22.3 ± 3.7 16.5 ± 1.5 22.7 ± 1.1* 21.1 ± 5.1 48.7 ± 2.1*
Extracellular
Acid Phosphatase:
Root Tips 		31.8 ± 4.3 31.8 ± 3.1 29.4 ± 7.4 79.8 ± 7.8* 38.4 ± 1.7 108 ± 2.3*

* Significantly different at 0.05