EFFECTS OF PHOSPHORUS AND POTASSIUM DEFI-CIENCY TREATMENT ON ROOTS SECRETION OF WHEAT AND RICE SEEDLINGS
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概要
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Firstly, the secretion of sugars, protein and acid phosphatase from wheat and rice roots into surrounding medium under conditions of P and K deficiency stresses were studied. Secondly, Sephadex elution patterns of wheat root exudates labeled with ^<14>C under N, P and K deficiency treatments were compared. P deficiency treatment induced acid phosphatase activity in medium, in spite of the decrease in the secretion of total sugars and protein from roots into medium, whereas no such increase was observed in K deficiency stress. Secretion of high molecular fraction of ^<14>C compounds from roots was accelerated by P deficiency stress, probably being associated with the presence of phosphatase activity in the medium. Activity of acid phosphatase secreted from P-deficient roots corresponded to nearly one half of the rate of P absorption by normal plant.
- 一般社団法人日本土壌肥料学会の論文
著者
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Hirata Hiroshi
Faculty Of Agriculture University Of Tokyo
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Hirata Ayako
Faculty Of Agriculture The University Of Tokyo
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HISAKA Hiroyuki
Faculty of Agriculture, Tokyo University of Agriculture and Technology
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Hirata Hiroshi
Faculty Of Agriculture Tokyo University Of Agriculture And Technology
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Hirata Hiroshi
Faculty Of Agriculture The University Of Tokyo
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Hisaka Hiroyuki
Faculty Of Agriculture Tokyo University Of Agriculture And Technology
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