Protocarnívores plants (sometimes these paracarnívores, subcarnívores or semicarnívores) are plants that trap and kill insects or animals but do not have the ability to digest them or to absorb nutrients from their prey as it does makes a carnivorous plant. The morphological adaptations are parallel to the structure of the carnivorous plant trap in the strict sense.
The demarcation line between the carnivorous plants and protocarnívores not well demarcated by the lack of a precise definition of carnivorisme in plants and the literature is ambiguous on this issue.
Or plants of the genus Drosera Dionaea, known since antiquity that are carnivorous. Chalen Darwin believed that many plants that had developed adhesive glands as Erica tetralix, Mirabilis longifolia, Pelargonium zonale, Primula and Saxifraga siness Umbrosa could be carnivorous, but that they did little research. Francis Lloyd has thatched A list of carnivorous plants in his book of the year 1942. Later in 1981, Paul Simon rediscovers an Italian magazine of the early twentieth century few articles that identified several species of carnivorous plants after making Dige capture it with their sticky trap and missing the reference used in the literature.
Definition of carnivorous plant
There are two more restrictive than the other one.
Under the more restrictive definition of carnivorous plant must have morphological adaptations that allow them to attract prey using perfumes or colors, capture it and prevent escape, digesting it with enzymes that the plant produces and absorb products of digestion through specialized structures. The less restrictive definition accepts that the plant does not produce its own enzymes.
There are intermediate degrees between a carnivorous plant and not a strictly carnivorous of the protocarnívores therefore are an intermediate level. Protocarnívores Some plants are an example of evolutionary convergence in form but not necessarily in function. The genus Plumbago, for example, have hairs on the sepals gladulars structurally recall that the tentacles of the carnivorous Drosera and Drosophyllum.
Types of traps
There are parallels between the types of traps among carnivorous and protocarnívores. A plant is potentially protocarnívora Dipsacus fullonum (present in the Catalan Countries) than the leaves surrounding the stem accumulates rain water and where there are often drowned insects but not found to make enzymes that allow them to take advantage delsinsectes captured passively.
The herb called sarronets Shepherd (Capsella bursa-pastoris) is considered protocarnívora. When the seeds hydrated secrete a sticky fluid that captures and kills insects. The only esaminato criterio che è stato e quanto è la pianta if it avvantaggi dall'adattamento carnivores.
Source : http://ca.wikipedia.org/wiki/Protocarn%C3%ADvora