Phosphorus

Phosphorus [ Physiology - Chemistry ]
Abbreviation: P

Dictionary of botanic terminology - index of names

Phosphorus deficiency [ Horticulture - Phytopathology ]


	Absence or insufficiency of phosphorus needed for normal growth and development.

Deficiency symptoms of this element, like nitrogen, are always found in the older plant leaves first. The first symptom is a loss of sheen or shine of the older leaves (some report this as a darker green colour). Next the area along the main veins of the underside of these leaves tends to exhibit red, yellow and bluish pigments. This colouration eventually spreads to other portions of the leaves. The young leaves generally remain green but are reduced in size. Phosphorus-deficient plants are stunted. Maturity of the plant is often delayed. Root development is poor.

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