Homeostasis and Transport of Inorganic Phosphate in Plants : GROWTH AND DEVELOPMENT : MEMBRANES AND BIOENERGETICS :

• MIMURA,Tetsuto

  Biological Laboratory, Hitotsubashi University

抄録

In this review, homeostasis of inorganic phosphate (P_i) in plants is discussed in terms of membrane transport of P_i. Phosphate homeostasis is observed in plant systems at various levels. The cytoplasmic level of P_i is kept almost constant by exploitation of the vacuole as a reservoir of P_i. The vacuole also seems to maintain the apoplastic level of P_i at a quasi-constant level. During P_i deficiency, P_i is re-translocated from the older to the younger leaves. The concentration of P_i in young leaves, thus, is kept at a higher level without a supply of P_i from the root. The phenomenon can be referred to as leaf-level P_i homeostasis. All these phenomena are related to membrane P_i transport activities. P_i uptake activities of both the plasma membrane and the tonoplast change in response to the supply of P_i. P_i transport across the plasma membrane is controlled by the activities of both the P_i transporter and the H^+ pump, the activity of which is modulated by P_i itself.

収録刊行物

• Plant and cell physiology

  Plant and cell physiology 36 (1), 1-7,

  Japanese Society of Plant Physiologists

キーワード

• Apoplast
• H^+ pump
• Phosphate transport
• Plasma membrane
• Subcellular distribution
• Tonoplast

詳細情報

• CRID: 1542261570220903296
• NII論文ID: 110003720566
• NII書誌ID: AA0077511X
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10771521
• 本文言語コード: en
• データソース種別:
  • NDL-Digital
  • CiNii Articles