PT - JOURNAL ARTICLE AU - Robinson, D. G. AU - Sieber, H. AU - Kammerloher, W. AU - Schaffner, A. R. TI - PIP1 Aquaporins Are Concentrated in Plasmalemmasomes of Arabidopsis thaliana Mesophyll AID - 10.1104/pp.111.2.645 DP - 1996 Jun 01 TA - Plant Physiology PG - 645--649 VI - 111 IP - 2 4099 - http://www.plantphysiol.org/content/111/2/645.short 4100 - http://www.plantphysiol.org/content/111/2/645.full SO - Plant Physiol.1996 Jun 01; 111 AB - The PIP1 subfamily of water channel proteins (aquaporins) constitute about 1% of the plasma membrane (PM) proteins from Arabidopsis thaliana leaves. Immunogold electron microscopy has confirmed their localization at the PM of mesophyll cells. Very high labeling density at PM invaginations known as plasmalemmasomes was observed. Therefore, we suggest that these subcellular structures are involved in water transport between the apoplast and the vacuole.