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'Vicia faba' in keywords
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1998 (1)
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1Author    H. SchnablRequires cookie*
 Title    Anion Metabolism as Correlated with the Volume Changes of Guard Cell Protoplasts  
 Abstract    Isolated and purified guard cell protoplasts o f starch-containing (Vicia faba) and starch-lacking (Allium cepa) stom ata were used to study the m etabolism o f m alate and C l-anions as correlated with the K +-induced swelling o f protoplasts. The correlation between swelling and malate synthesis in starch-containing and the inhibition of this correlation in starch-lacking guard cell protoplasts were demonstrated. A model system was proposed involving the role o f m alate and its place of synthesis in these two contrasting stomatal types. 
  Reference    Z. Naturforsch. 35c, 621 (1980); received March 27 1980 
  Published    1980 
  Keywords    Allium cepa, G uard Cell Protoplasts, Malate, Vicia faba 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0621.pdf 
 Identifier    ZNC-1980-35c-0621 
 Volume    35 
2Author    AndreasB. Wolff, Maung Thynn, Elisabeth Gorge, Dietrich WernerRequires cookie*
 Title    Wyerol and Wyerone Accumulation in Tissue Cultures of Vicia faba  
 Abstract    Callus cultures of various cultivars of Vicia faba were studied for regeneration. During callus growth on agar or in liquid medium a black tissue was often observed correlated with an autolysis of some cells. With those tissues callus growth and regeneration of plants was inhibited. In black callus the phytoalexin synthesis is induced without infection by microorganism. The main phyto-alexins in the callus tissue are wyerol and wyerone, with some wyeronic acid and dihydrowyerone. Wyerol was found especially in the cultivar Troy at a high concentration. In four cultivars the pooled phytoalexin concentration varied between 10 and 150 pg-g _1 fresh weight. 
  Reference    Z. Naturforsch. 43c, 636—640 (1988); received March 7/May 30 1988 
  Published    1988 
  Keywords    Vicia faba, Callus and Liquid Cultures, Regeneration, Phytoalexins 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0636.pdf 
 Identifier    ZNC-1988-43c-0636 
 Volume    43 
3Author    Bdel-B AssetRequires cookie*
 Title    Calcium/Calmodulin Regulated Cell Wall Regeneration in Zea mays Mesophyll Protoplasts  
 Abstract    The composition of newly synthesized cell walls starting from enzymatically isolated Zea mays mesophyll protoplasts was studied. The contents of pectin, cellulose and hemicellulose in addition to the wall-associated proteins were followed in the presence of increasing con­ centrations of calcium ions with or without the calcium channel blockers like lanthanum, lithium ions, verapamil, nifedipine and the calmodulin antagonist trifluperazine. Pectin accu­ mulation was inhibited by all antagonists except lanthanum. Cellulose formation, however, was increased by organic antagonists trifluperazine, verapamil and maximally by nifedipine while it was not affected by the inorganic ions lanthanum or lithium. Hemicellulose accumu­ lated with nifedipine present but significantly decreased by all other antagonists. A dded Ca2+ (5 -1 0 m M) reversed most of the blockers-induced inhibition on pectin and hemicellulose. In the case of cellulose, however, calcium concentration which reversed the inhibitory action of these antagonists was dependent on the antagonist. Starch exhibited little alterations indicat­ ing its minor role in deposition of wall components. Cell wall-associated proteins were nega­ tively affected by lanthanum and verapamil and positively by lithium and nifedipine. G en­ erally, this fraction was found in a negative correlation with pectin levels. Chlorophyll contents were lowered after growth for 48 h; this might be due to repeated cell division. These results are discussed in relation to the mechanism of antagonists and effects of calcium. 
  Reference    Z. Naturforsch. 53c, 33—3 (1998); received November ll/D ecem ber 8 1997 
  Published    1998 
  Keywords    Calcium, Calcium Antagonists, Cell Wall Polysaccharides, Protoplasts, Vicia Faba 
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 TEI-XML for    default:Reihe_C/53/ZNC-1998-53c-0033.pdf 
 Identifier    ZNC-1998-53c-0033 
 Volume    53