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Absorption distribution and utilization of radioactive phosphorus in healthy and root wilt diseased coconut palms



Absorption distribution and utilization of radioactive phosphorus in healthy and root wilt diseased coconut palms



Journal of Nuclear Agriculture & Biology 8(1): 33-35



Radioactive KH232PO4 was fed to coconut leaves and palms under laboratory and field conditions. In healthy palms the absorption of P by roots and its accumulation in spindle and 1st fully opened leaves were significantly higher until 9th h as compared to that of diseased palms, but at later stages the reverse pattern was observed. The time required for 32P to reach the spindle (top-most leaf) situated at 9.5 m height in both diseased and healthy palm was 3 h only. In contrast to the leaves, the activity of 32P differed insignificantly in stem and roots of healthy and diseased palms and also the native P remained higher in the stem and roots of former palms as compared to the latter. The analysis of total and different fractions of P and entry of 32P in the different forms for organic P indicated that although total P was more in the case of diseased palms but the organic P, especially the nucleic acid P, was significantly less as compared to healthy ones. This revealed less utilization of absorbed P in the synthesis of P-constituted organic substances in diseased palms.

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Accession: 004649433

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