Hilfe Engel - Forum
Thema drucken
17.08.2018 08:11
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The blades of the sheet is divided into two regions: a petiole heart-shaped plane capable of photosynthesis and a pair of lobes hinged in the central vein sheet constituting the real and form the trap. The upper face of these lobes contains red pigments anthocyanin and its edges secrete mucilage . The lobes show a rapid plant movement Marquez Valdes-Scantling Packers Jersey , slamming when stimulated by prey. Trapping mechanism is activated when the dam contacts one of the three trichomes shaped hair found in the beam of each of the lobes. This mechanism is so specialized that can distinguish between live prey and various stimuli like drops of water, 3 if it is a dam, it must play two of the hairs in an interval of 20 seconds or just one twice in rapid sequence , 3 after which the lobes are closed in about 0.1 seconds. 4 are scalloped edges by protrusions or hair-like cilia that interlock and prevent the escape dam. These protrusions and sensory hairs or hair triggers are probably homologous to the tentacles of its close relative Drosera . Although scientists do not know the exact evolutionary history of the Venus flytrap suggest hypotheses that could have evolved from Drosera . 5 |
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