Integration of Conservation Strategies of Plant Genetic ... - Genres
Integration of Conservation Strategies of Plant Genetic ... - Genres Integration of Conservation Strategies of Plant Genetic ... - Genres
2.4 Alpine botanic gardens The first alpine gardens were founded in Austria, Switzerland and Bavaria in 1800. Numerous alpine gardens were created at the end of last century in several European countries with the aim of protecting alpine flora. Today in Italy there are 18 alpine gardens ( Tab. 5; Fig.1 ) founded on the Alps, Appennines and Etna mountains. The total surface is very limited, 422,000 sq m (= sq Km 0,42), but the number of protected species may be quite relevant. 2.5 Arboreta One of the functions of the arboreta founded in 1700 was education. More recently they have been engaged for the conservation of natural patrimony. In Italy there are only 4 arboreta ( Tab. 5; Fig.1 ) with a total surface of 1,806,210 sq m ( = sq Km 1,8 ). On a limited area a great number of native species is conserved. 2.4 Tissue culture If "in situ" conservation is excluded "in vitro" culture represents the only way of storing plants propagating through bulbs or rhizomes. The problems that can be met when this method is used are due to the difficulties in finding the right combination of nutritional elements and growth conditions. Besides, it is necessary to better study and understand the techniques of reproduction of plants starting from tissue cultures and the biological phenomena which occur during conservation, particularly referring to genetic integrity of collections. If tissue cultures resulted particularly unstable, then the prospects of this method of conservation would be limited. At present, satisfying techniques for "in vitro" conservation of potato, sweet potato and some fruit trees of temperate regions have been set up. This method, if improved, could be extended to the conservation of plants that do not produce fruits easily, in order to conserve material collected at the vegetative stadium, and for species with recalcitrant seeds. In Italy, as in the world, there are few laboratories, where scientists are working out techniques of "in vitro" culture and cryo-conservation for long term preservation. 3. "In situ" Conservation In the last decade, with the influence of IUCN and the support of WWF, a lot of natural areas have been established. The aim is to preserve populations representative of different ecosystems, often also including agricultural systems and cultivated plants. For this kind of conservation, the main problem is to determine the minimal size of populations, without endangering their genetic structure and stability. For this purpose, it is very useful to know the genetic structure of the population, but unfortunately, the studies in this field are still limited. 3.1 Fruit and perennial crops "In situ" conservation is a method suggested for fruit trees, pasture species and wild relatives. The first step for setting up protected areas ( reserves, national parks and biospheres ) is to prepare a list of the species threatened of extinction and determine the areas in which the highest level of their genetic diversity is concentrated.
Plant genetic resources activities in Italy The Working Group, founded in 1981 by the CNR in collaboration with Universities and other institutions, for conservation of fruit trees, in addition to the "ex situ" activity has played an important role also for "in situ" conservation. In fact the Group has suggested to protect areas particularly rich in genetic variability, already identified and from which experts are still collecting materials for making field collections ( Scaramuzzi, 1988 ; Agabbio, 1992 ). As a result of this activity the national Group, in collaboration with technical agricultural schools, amateurs, botanic gardens, farmers, etc. has defined, for 10 fruit crops, at least 84 stations, throughout the peninsula, where 8,861 traditional cultivars have been identified and are actually protected by 24 different institutions ( Tab. 6; Fig. 2 ). The importance of the role played by amateurs and farmers for "in situ" and or "on farm" conservation of old varieties of fruit crops has been mentioned by several authors (Perna and Della Ragione, 1992). 3.2 Forest and perennial species In 1988, all over the world, more than 3,500 protected areas were counted, distributed in 125 countries, for a total of 4,300,000 sq km. Several species have been preserved. For example, in the Caucasian mountains, the wild relatives of wheat and fruit trees have been protected; on the east coast of the Caspian Sea, the wild pistachio, apricot and almond trees and several wild forages; in Ethiopia the wild species of coffee. At present, in the Ivory Coast, over 28 parks and reserves preserve about 5,000 sq Km of tropical forest; in Tanzania there are parks for 12% of the total surface, in Botswana for 18%. In Italy the total surface covered by forest trees is of ca. 87,000 sq Km, which represents the 29 % of the total surface of the peninsula . Unfortunately until 1985 only 7% of the total forestry surface under bonds, that is ca. 6,000 sq Km, was submitted to naturalistic bond, like parks, reserves, oasis, etc. ( Tab. 7 ). 3.3 National parks Today, as far as the national parks are concerned, the situation is slightly improved. In fact, at present, there are 18 national parks for a total surface of 9,430 sq Km ( Tab. 8; Fig. 3 ). In these areas, several species find an adequate preservation. However experts suggest that, if the objective is protection and conservation of existing species, in these areas human activities should be continued, exerting the same influence as in the past. The limits of this kind of conservation are represented by the high costs, unavailability of large surfaces, and the impossibility to carry it out in all the parts of the world. 3.4 Biosphere reserves This type of protected area is especially suitable for conserving wild relatives. The aims of a biosphere reserve are to conserve genetic resources and representative samples of the world's ecosystems; whatever is the aim, education and training are priorities. Unesco's Man and the Biosphere Program ( MAB ) started the idea of biosphere reserves in 1974 and, since then, some 269 protected areas in 70 countries around the world have entered into the Unesco list and are part of the MAB network. In Italy, in 1977 three biosphere reserves ( Tab. 8; Fig. 3 ) have been designeted: Miramare ( Trieste
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<strong>Plant</strong> genetic resources activities in Italy<br />
The Working Group, founded in 1981 by the CNR in collaboration with Universities and other<br />
institutions, for conservation <strong>of</strong> fruit trees, in addition to the "ex situ" activity has played an important<br />
role also for "in situ" conservation. In fact the Group has suggested to protect areas particularly rich in<br />
genetic variability, already identified and from which experts are still collecting materials for making field<br />
collections ( Scaramuzzi, 1988 ; Agabbio, 1992 ). As a result <strong>of</strong> this activity the national Group, in<br />
collaboration with technical agricultural schools, amateurs, botanic gardens, farmers, etc. has defined,<br />
for 10 fruit crops, at least 84 stations, throughout the peninsula, where 8,861 traditional cultivars have<br />
been identified and are actually protected by 24 different institutions ( Tab. 6; Fig. 2 ). The importance<br />
<strong>of</strong> the role played by amateurs and farmers for "in situ" and or "on farm" conservation <strong>of</strong> old varieties<br />
<strong>of</strong> fruit crops has been mentioned by several authors (Perna and Della Ragione, 1992).<br />
3.2 Forest and perennial species<br />
In 1988, all over the world, more than 3,500 protected areas were counted, distributed in 125 countries,<br />
for a total <strong>of</strong> 4,300,000 sq km. Several species have been preserved. For example, in the Caucasian<br />
mountains, the wild relatives <strong>of</strong> wheat and fruit trees have been protected; on the east coast <strong>of</strong> the<br />
Caspian Sea, the wild pistachio, apricot and almond trees and several wild forages; in Ethiopia the wild<br />
species <strong>of</strong> c<strong>of</strong>fee. At present, in the Ivory Coast, over 28 parks and reserves preserve about 5,000 sq Km<br />
<strong>of</strong> tropical forest; in Tanzania there are parks for 12% <strong>of</strong> the total surface, in Botswana for 18%.<br />
In Italy the total surface covered by forest trees is <strong>of</strong> ca. 87,000 sq Km, which represents the 29 % <strong>of</strong><br />
the total surface <strong>of</strong> the peninsula . Unfortunately until 1985 only 7% <strong>of</strong> the total forestry surface under<br />
bonds, that is ca. 6,000 sq Km, was submitted to naturalistic bond, like parks, reserves, oasis, etc. ( Tab.<br />
7 ).<br />
3.3 National parks<br />
Today, as far as the national parks are concerned, the situation is slightly improved. In fact, at present,<br />
there are 18 national parks for a total surface <strong>of</strong> 9,430 sq Km ( Tab. 8; Fig. 3 ). In these areas, several<br />
species find an adequate preservation. However experts suggest that, if the objective is protection and<br />
conservation <strong>of</strong> existing species, in these areas human activities should be continued, exerting the same<br />
influence as in the past.<br />
The limits <strong>of</strong> this kind <strong>of</strong> conservation are represented by the high costs, unavailability <strong>of</strong> large surfaces,<br />
and the impossibility to carry it out in all the parts <strong>of</strong> the world.<br />
3.4 Biosphere reserves<br />
This type <strong>of</strong> protected area is especially suitable for conserving wild relatives. The aims <strong>of</strong> a biosphere<br />
reserve are to conserve genetic resources and representative samples <strong>of</strong> the world's ecosystems;<br />
whatever is the aim, education and training are priorities.<br />
Unesco's Man and the Biosphere Program ( MAB ) started the idea <strong>of</strong> biosphere reserves in 1974 and,<br />
since then, some 269 protected areas in 70 countries around the world have entered into the Unesco list<br />
and are part <strong>of</strong> the MAB network.<br />
In Italy, in 1977 three biosphere reserves ( Tab. 8; Fig. 3 ) have been designeted: Miramare ( Trieste