Aspects of the phosphorus nutrition of white clover populations I. Inorganic phosphorus content of leaf tissue
Titel:
Aspects of the phosphorus nutrition of white clover populations I. Inorganic phosphorus content of leaf tissue
Auteur:
Caradus, J. R. Snaydon, R. W.
Verschenen in:
Journal of plant nutrition
Paginering:
Jaargang 10 (1987) nr. 3 pagina's 273-285
Jaar:
1987-02
Inhoud:
The effect of pretreatment with sufficient and deficient levels of phosphorus (P), applied for 16 days, on the subsequent P response of four populations of white clover (Trifolium repens L.) was studied in solution culture in a glasshouse. Inorganic-P and total-P levels of leaf tissue were measured at three harvest dates. Increasing the subsequent supply of P increased both inorganic-p and total-P levels of leaf tissue, especially if plants had previously been P-stressed. The p content of leaves, and especially the 'organic-P' content decreased with leaf age. Several white clover populations, collected from soils high in p and low in P, were grown at sufficient and deficient levels of p. populations collected from low-P soils accumulated more inorganic-P in their leaf tissue, especially when grown at high-P, and were also able to reduce these inorganic-p levels to lower concentrations when the P supply was deficient. This may be an important adaptive feature of white clover plants able to survive in low-P soils.
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