Immunochemical Analysis of Aquaporin Isoforms in Arabidopsis Suspension-Cultured Cells

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Aquaporins mediate the movement of water across biomembranes. <I>Arabidopsis thaliana</I> contains 35 aquaporins that belong to four subfamilies (PIP, TIP, SIP, and NIP). We investigated their expression profiles immunochemically in suspension-cultured <I>Arabidopsis thaliana</I> cells during growth and in response to salt and osmotic stresses. Protein amounts of all aquaporins were much lower in cultured cells than in the plant tissues. This is consistent with the low water permeability of protoplasts from cultured cells. After treatment with NaCl, the protein amounts of PIP2;1, PIP2;2, and PIP2;3 in the cells increased several-fold, and those of TIP1;1 and TIP1;2, 15- and 3-fold respectively. PIP1 did not change under the stress. Cell death began after 19 d in culture, accompanied by marked accumulation of PIPs and TIPs and a gradual decrease in SIPs. Our results suggest the followings: (i) Accumulation of aquaporin isoforms was individually regulated at low levels in single cells. (ii) At least PIP2;2, PIP2;3, TIP1;1, and TIP1;2 are stress-responsive aquaporins in suspension cells. (iii) A sudden increment of several members of PIP2 and TIP1 subfamilies might be related to cell death.

収録刊行物

  • Bioscience, biotechnology, and biochemistry  

    Bioscience, biotechnology, and biochemistry 70(4), 980-987, 2006-04-23 

    Japan Society for Bioscience, Biotechnology, and Agrochemistry

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各種コード

  • NII論文ID(NAID)
    10018532678
  • NII書誌ID(NCID)
    AA10824164
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09168451
  • NDL 記事登録ID
    7899925
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産) // ZR2(科学技術--生物学--生化学) // ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-G223
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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