Literatur Neuigkeiten

[Martin Brunner]

Hallo!

Wir haben im Geschäft nun Anschluss an eine Datenbank über Artikel in Fachzeitschriften.

Habe mal unter "Fleischis" gesucht...  ;D

Folgende Artikel habe ich gefunden (Zeitschrift, Titel, Autor, Abstract).

Grüße

Martin B.

Arthropod Structure and Development 33 (1) , 103-111

How do plant waxes cause flies to slide? Experimental tests of wax-based trapping mechanisms in three pitfall carnivorous plants

Gaume, L.a, Perret, P.b , Gorb, E.c , Gorb, S.c , Labat, J.-J.d , Rowe, N.a

a Bot. Bioinformatique l'Arch. Plantes, UMR CNRS 5120, Boulevard de la Lironde - TA40/PS2, F-34398 Montpellier, Cedex 5, France

b Ctr. d'Ecologie Fonct. Evol. - CNRS, 1919 route de Mende, F-34293 Montpellier, Cedex 5, France

c Evolutionary Biomaterials Group, Department Prof. Dr. E. Arzt, Max Planck Inst. for Metals Research, Heisenbergstr. 3, D-70569 Stuttgart, Germany

d Conservatoire des Plantes Carnivores, Nature et Paysages, F-32360 Peyrusse-Massas, France

Abstract:

The waxy surfaces of three carnivorous plants, Nepenthes ventrata (Nepenthaceae), Brocchinia reducta and Catopsis berteroniana (Bromeliaceae), were compared using scanning electron microscopy (SEM). Their effects on attachment and locomotion of the fly Calliphora vomitoria were studied. The waxy surface of N. ventrata is comprised of a heterogeneous layer from which only platelet-shaped crystalloids could be detached by brushing. In the two bromeliads, the crystalloids are thread-shaped and form a homogenous dense network, which was entirely removable from the epidermis. Experimental data showed that none of the flies was able to walk across any of the waxy surfaces and only a few were able to take off from those surfaces. Both the absence of sites for claw anchorage, especially in N. ventrata, and the wax itself were shown to contribute to the trapping ability of the plants. Only half of the flies quickly recovered their locomotion ability on a glass surface after 20 min of being tested on waxy plant surfaces. SEM observations revealed that the wax of C. berteroniana formed a powder of broken crystals on the tenent setae of the flies' pulvilli. In contrast, the waxes of B. reducta and N. ventrata appeared to have lost their crystal structure in contact with the tenent setae and formed an amorphous substance that adhered setae together. We hypothesize that wax interacts with adhesive fluids secreted by the fly pad and thereby prevents the tenent setae from functioning effectively. © 2003 Elsevier Ltd. All rights reserved.

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Plant Cell, Tissue and Organ Culture 77 (2) , 211-214

Micropropagation of Drosera peltata, a tuberous sundew, by shoot tip culture

Kim, K.-S.a b , Jang, G.-W.a c

a Inst. of Agric. Sci. and Technology, Chonnam National University, Gwangju, 500-757, South Korea

b Department of Horticulture, Chonnam National University, Gwangju, 500-757, South Korea

c Korean Carnivorous Plant Institute, Gwangju, 501-250, South Korea

Abstract:

In order to establish and optimize an in vitro micropropagation method of Drosera peltata (a tuberous sundew), a carnivorous plant, the effects of medium type, MS medium concentration, pH and cytokinin type on shoot proliferation and tuber formation were investigated, using one month-old shoot tips. The shoot proliferation and tuber formation were most effective on 1/2 MS medium without cytokinins. The optimum pH of the media was pH 5.7. Tubers were planted in plastic pots filled with 1:1 peat moss and sand. The survival rate of the plantlets was almost 100%, and they exhibited normal development. With subculture every 12 weeks, hundreds of the plants were propagated from a single plant within a year.

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Canadian Journal of Botany 81 (11) , 1129-1142

Comparative flower structure of three species of sundew (Drosera anglica, Drosera linearis, and Drosera rotundifolia) in relation to breeding system

Murza, G.L.a b, Davis, A.R.a

a Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Sask. S7N 5E2, Canada

b 204-3837 Luther Place, Saskatoon, Sask. S7H 4B1, Canada

Abstract:

Whereas much attention has been given to the fascinating prey-trapping leaves of carnivorous plants, less research has been conducted on their flower structure and breeding systems. Accordingly, a comparative study of the floral morphology and anatomy of the three species of sundews (Droseraceae: Drosera anglica Huds., Drosera linearis Goldie, and Drosera rotundifolia L.) in Saskatchewan was performed to ascertain the presence of floral rewards for potential pollinators and to obtain pollen to ovule ratios, an indicator of breeding system. Utilizing light and scanning electron microscopy, differences between the three species were apparent in length of styles, number of placentas, anther and pollen colour, and structure of glandular trichomes on sepals. The occurrence of features unique to each species does not support the concept of D. anglica as a hybrid of the other two species. Flowers of all three species lack nectaries, although clusters of papillate cells that were reminiscent of secretory tissue were observed at the apices of anthers and at the summits of ovaries. Pollen to ovule ratios were low for all species, ranging from 9.0 to 18.7 in D. rotundifolia and D. linearis, respectively, suggesting an autogamous breeding system for each species.

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Biologia Plantarum 47 (3) , 395-402

Ecophysiological characterization of dormancy states in turions of the aquatic carnivorous plant Aldrovanda vesiculosa

Adamec, L.

Section of Plant Ecology, Institute of Botany, Acad. of Sci. of the Czech Republic, Dukelská 135, CZ-37982 Třeboň, Czech Republic

Abstract:

Two main dormancy states, innate and imposed dormancy, were characterized in turions (winter buds) of the aquatic carnivorous plant Aldrovanda vesiculosa L. (Droseraceae) kept at 3 ± 1°C in a refrigerator over the winter. As a result of the breaking of imposed dormancy by a temperature increase (at 15-20°C), some of the turions rose to the water surface within 1-3 d and germinated. Turion leaves contained large lacunae with a slimy reticulum and were filled by water over winter. As a result of breaking imposed dormancy, the proportion of gas volume in inner turion leaves rose from 10-20% to 100% of leaf lacunae volume. The aerobic dark respiration rate of the turions [0.74-1.5 μmol (O2) kg-1(FM) s-1] slightly increased during innate dormancy after 1-2 d at 20°C, while it was almost constant during the breaking of imposed dormancy. The anaerobic fermentation rate of the turions was only 1.5-7% of the oxygen respiration rate and also was constant during the breaking of imposed dormancy. In turions, the content of glucose, fructose, and sucrose was the same for the two states of dormancy, but starch content was greatly reduced for the imposed dormancy (10-11 vs. 32% DM). It may be suggested that a temperature increase causes an increase of fermentation or respiration which is responsible for the evolution of gas in turion lacunae and, thus, for turion rising.

[Christian Dietz]

Hallo! 

Canadian Journal of Botany 81 (11) , 1129-1142

Comparative flower structure of three species of sundew (Drosera anglica, Drosera linearis, and Drosera rotundifolia) in relation to breeding system

Murza, G.L.a b, Davis, A.R.a

a Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Sask. S7N 5E2, Canada

b 204-3837 Luther Place, Saskatoon, Sask. S7H 4B1, Canada

Abstract:

Whereas much attention has been given to the fascinating prey-trapping leaves of carnivorous plants, less research has been conducted on their flower structure and breeding systems. Accordingly, a comparative study of the floral morphology and anatomy of the three species of sundews (Droseraceae: Drosera anglica Huds., Drosera linearis Goldie, and Drosera rotundifolia L.) in Saskatchewan was performed to ascertain the presence of floral rewards for potential pollinators and to obtain pollen to ovule ratios, an indicator of breeding system. Utilizing light and scanning electron microscopy, differences between the three species were apparent in length of styles, number of placentas, anther and pollen colour, and structure of glandular trichomes on sepals. The occurrence of features unique to each species does not support the concept of D. anglica as a hybrid of the other two species. Flowers of all three species lack nectaries, although clusters of papillate cells that were reminiscent of secretory tissue were observed at the apices of anthers and at the summits of ovaries. Pollen to ovule ratios were low for all species, ranging from 9.0 to 18.7 in D. rotundifolia and D. linearis, respectively, suggesting an autogamous breeding system for each species.

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Hiezu verweise ich auf einen Thread, den Andreas Fleischmann vor längerer Zeit bereits eingestelllt hat. Er ist hier zu finden :

http://www.carnivoren.org/cgi-bin/forum/YaBB.pl?board=cp_news;action=display;num=1074638881

Gruß,

Christian