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Chinese Journal of Applied Ecology ›› 1999, Vol. 10 ›› Issue (5): 593-595.

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Accumulation,distribution and interaction of phosphorus and zinc in wheat cells

Yang Zhimin, Zheng Shaojian, Hu Aitang, Zhao Xiulan   

  1. College of Natural Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095
  • Received:1997-09-11 Revised:1997-12-25 Online:1999-09-25 Published:1999-09-25

Abstract: This paper studied the accumulation,distribution and interaction of phosphorus and zinc in the asexual cells of wheat cultured in MS solution with three levels of phosphorus(0.5,1.5,3.5 mmol·L-1) and two levels of zinc(0,60 μmol·L-1).An application of 60μmol·L-1 Zn and 0.5~1.5mmol·L-1 P increased the reproduction and the dry matter yield of wheat cells,while the supply with no Zn or high P(3.5 mmol·L-1) showed an inhibited effect.The accumulation of P and Zn in cells increased with increasing P and Zn supply. In comparison with Zn-deficiency,an application of 60μmol·L-1 Zn reduced the P content in cells cultured for 7 days. 0.5~1.5 mmol·L-1 P enhanced Zn accumulation in cells, but decreased it under 3.5 mmol·L-1 P. As much as 83.9%~88.3% of the total P was associated with thecell walls, and the more the P supply,the greater the P content in them.The results also showed more than half of Zn (52.0~60.5%)in cells was examined in cell walls.In contrast to the cell walls,the contents of P and Zn in vacuoles were much lower,with 2.3~3.8% and 10.6~30% respectively.

Key words: Phosphorus, Zinc, Interaction, Wheat suspention cell