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1980 (1)
1974 (1)
1Author    Brogå, A. JohnssonRequires cookie*
 Abstract    Recent findings indicate that lithium belongs to the group of rather exclusive agents which affect the period of circadian clocks: The period of the cir­ cadian petal movements of Kalanchoe is increased by about 2 hours in 5 m M LiCl 2. In the present paper we will report an action of lithium on a much more rapid oscillation, which under certain circum­ stances occurs in stomatal regulation. These oscil­ lations are found to be remarkably slowed down by lithium, in analogy to the circadian oscillations of Kalanchoe. Material and Methods 
  Reference    (Z. Naturforsch. 29c, 298 [1974]; received February 11 1974) 
  Published    1974 
  Keywords    Lithium, Stomata, Plant Rhythm, Cell Permeability 
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 TEI-XML for    default:Reihe_C/29/ZNC-1974-29c-0298_n.pdf 
 Identifier    ZNC-1974-29c-0298_n 
 Volume    29 
2Author    PeterD. Ittrich, Klaus FischerRequires cookie*
 Title    Accum ulation and Conversion o f 3-O -M ethyl-D -G lucose in Guard Cells o f Commelina communis L  
 Abstract    Young plants of Commelina communis L. were allowed to take up [U-14C]-3-0-methyl-D-glucose through the cut stem via the transpiration stream. The distribution of this tracer carbohydrate in the plant was analyzed and its ac­ cumulation investigated in the epidermal tissue by micro­ autoradiography. Over feeding periods from 1 to 24 h 3-O-methyl-D-glucose accumulated predominantly in the guard cells of the stomata, whereas the other epidermal cells contained only minor amounts. Thus, guard cells, despite of the lack of plasmodesmata and the photosynthetic carbon reduction cycle, can easily obtain the carbohydrates from photosynthetic tissues necessary to drive the turgor mechanism of opening and closing. Depending upon the part of the plant, 3-O-methyl-D-glucose was converted during a period of 4 h up to 30% to the corresponding 6-phosphate despite the alledged inert nature in metabo­ lism of this artificial carbohydrate. 
  Reference    Z. Naturforsch. 35c, 832—834 (1980); received July 11 1980 
  Published    1980 
  Keywords    Guard Cells, Stomata, Commelina, Carbohydrate Accu­ mulation 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0832_n.pdf 
 Identifier    ZNC-1980-35c-0832_n 
 Volume    35