whoa ! that just beatifull, at firts i thought you were teasing me with that flower  maybe Gymnosporangium i forgot to ask if growing in juniperus right look like it.
  [image]http://en.wikipedia.org/wiki/Image:Cedar_apple_rust_telial_form.JPG[/[/image]
what you have there is yet againg beatifull maybe this can help http://en.wikipedia.org/wiki/Image:Cedar_apple_rust_telial_form.JPG[/url]
Gymnosporangium is a genus of heteroecious plant-pathogenic fungi which alternately infect members of the family Cupressaceae, primarily species in the genus Juniperus (junipers), and members of the family Rosaceae in the subfamily Maloideae (apples, pears, quinces, shadbush, hawthorns, rowans and their relatives).
In junipers (the primary hosts) (see photo), the fungus forms a ball about 2-4 cm in diameter which produces a set of orange tentacle-like spore tubes called telial horns. These horns expand and have a jelly like consistency when wet. The spores are released and travel on the wind until they infect an apple, pear, or hawthorn tree.
On the secondary hosts, the fungus produces yellowish depressions on the leaves. It also infects the fruit, which grows whitish tubes like a Medusa head. These are the spore tubes. The spores must then infect a juniper to complete the life cycle.
The fungus does not cause serious damage to junipers, but apple and pear trees can suffer serious loss of fruit production due to the effects of the fungus. Due to the economic impacts of the rusts in some areas where orchards are of commercial importance, some regions have attempted to ban the planting of and/or eradicate the coniferous hosts[1].
Selected species Species Primary host Secondary host Gymnosporangium amelanchieris Juniperus sect. Juniperus Amelanchier Gymnosporangium clavariiforme Juniperus sect. Juniperus Amelanchier, Crataegus, Pyrus Gymnosporangium clavipes Juniperus Cydonia Gymnosporangium confusum Juniperus Crataegus, Cydonia, Mespilus, Pyrus Gymnosporangium cornutum Juniperus sect. Juniperus Sorbus subgen. Sorbus Gymnosporangium cupressi Cupressus Amelanchier Gymnosporangium dobroznakovii Juniperus sect. Juniperus Pyrus Gymnosporangium fuscum (syn. G. sabinae) Juniperus sect. Sabina Pyrus Gymnosporangium fusisporum Juniperus sect. Sabina Cotoneaster Gymnosporangium gaeumannii Juniperus communis (not known) Gymnosporangium globosum Juniperus Crataegus Gymnosporangium gracile Juniperus Amelanchier, Crataegus, Cydonia Gymnosporangium harknessianum Juniperus Amelanchier Gymnosporangium inconspicuum Juniperus Amelanchier Gymnosporangium juniperi-virginianae Juniperus Malus Gymnosporangium kernianum Juniperus Amelanchier Gymnosporangium libocedri Calocedrus Amelanchier Gymnosporangium malyi (not known) Crataegus Gymnosporangium multiporum Juniperus (not known) Gymnosporangium nelsonii Juniperus (not known) Gymnosporangium nidus-avis Juniperus sect. Sabina Crataegus, Cydonia, Malus Gymnosporangium torminalis-juniperinum Juniperus sect. Juniperus Sorbus torminalis Gymnosporangium tremelloides Juniperus sect. Juniperus Cydonia, Malus, Sorbus Gymnosporangium yamadae Juniperus Malus
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  cuando una rafaga del pensamiento nos pasa al lado se puede sentir que valio la pena haber vivido, y cuando ese pensamiento se convierte en sueño no paramos de soñar hasta realizarlo
Edited by cactu (05/28/08 09:19 PM)
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