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Absorption of foliar-applied 32P by successive leaves, and distribution patterns in relation to early fruiting and abscission in the cowpea (Vigna unguiculata L.)


, : Absorption of foliar-applied 32P by successive leaves, and distribution patterns in relation to early fruiting and abscission in the cowpea (Vigna unguiculata L.). Annals of Botany 39(162): 639-646

In a controlled-environment experiment, the cowpea plant absorbed 43% of total radioactivity supplied in 24 h at the 4-leaf stage when the terminal leaflet of the 1st trifoliate (oldest) leaf was fed 32P. The percentage resulting from the feeding of trifoliates 2, 3 and 4 (youngest) were 58, 71 and 73%, respectively. Of the plant tissues, the root accumulated the greatest amounts of P exported by the fed leaflet, with the feeding of trifoliates 1, 2 or 3.

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