{"id":135080,"date":"2012-08-02T08:00:46","date_gmt":"2012-08-02T06:00:46","guid":{"rendered":"http:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/?p=135080"},"modified":"2013-04-18T12:30:25","modified_gmt":"2013-04-18T10:30:25","slug":"el-sexo-de-los-arboles-en-el-parrafo-el-parrafo-centesimo-cuadragesimo-de-el-origen-de-las-especies","status":"publish","type":"post","link":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/2012\/08\/02\/135080","title":{"rendered":"El sexo de los \u00e1rboles en el p\u00e1rrafo cent\u00e9simo cuadrag\u00e9simo de El Origen de las Especies"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone\" src=\"http:\/\/www.slrobertson.com\/images\/new-zealand\/north-island\/northland\/nz-trees-b.jpg\" alt=\"\" width=\"336\" height=\"200\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>No sabemos qui\u00e9n ni para qu\u00e9 estar\u00eda interesado en hacer las objeciones que indica el autor en este p\u00e1rrafo.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\"><em>140.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>In the case of a large tree covered with innumerable flowers, it may be objected that pollen could seldom be carried from tree to tree, and at most only from flower to flower on the same tree; and flowers on the same tree can be considered as distinct individuals only in a limited sense. I believe this objection to be valid, but that nature has largely provided against it by giving to trees a strong tendency to bear flowers with separated sexes. When the sexes are separated, although the male and female flowers may be produced on the same tree, pollen must be regularly carried from flower to flower; and this will give a better chance of pollen being occasionally carried from tree to tree. That trees belonging to all orders have their sexes more often separated than other plants, I find to be the case in this country; and at my request Dr. Hooker tabulated the trees of New Zealand, and Dr. Asa Gray those of the United States, and the result was as I anticipated. On the other hand, Dr. Hooker informs me that the rule does not hold good in Australia: but if most of the Australian trees are dichogamous, the same result would follow as if they bore flowers with separated sexes. I have made these few remarks on trees simply to call attention to the subject.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>En el caso de un \u00e1rbol grande cubierto de innumerables flores, se puede hacer la objeci\u00f3n de que el polen raras veces pudo ser llevado de un \u00e1rbol a otro, y generalmente s\u00f3lo de una flor a otra del mismo \u00e1rbol, y las flores del mismo \u00e1rbol s\u00f3lo en un sentido limitado pueden considerarse como individuos distintos. Creo que esta objeci\u00f3n es v\u00e1lida, pero creo tambi\u00e9n que la naturaleza lo ha precavido ampliamente dando a los \u00e1rboles una marcada tendencia a llevar flores de sexos separados. Cuando los sexos est\u00e1n separados, aunque las flores masculinas y femeninas puedan ser producidas en el mismo \u00e1rbol, el polen tiene que ser llevado regularmente de una flor a otra, y esto aumentar\u00e1 las probabilidades de que el polen sea de vez en cuando llevado de un \u00e1rbol a otro. Observo que en nuestro pa\u00eds ocurre el que los \u00e1rboles pertenecientes a todos los \u00f3rdenes tienen los sexos separados con m\u00e1s frecuencia que las otras plantas, y, a petici\u00f3n m\u00eda, el doctor Hooker hizo una estad\u00edstica de los \u00e1rboles de Nueva Zelandia, y el doctor Asa Gray otra de los \u00e1rboles de los Estados Unidos, y el resultado fue como yo hab\u00eda previsto. Por el contrario, Hooker me informa de que la regla no se confirma en Australia; pero si la mayor parte de los \u00e1rboles australianos son dic\u00f3gamos, tiene que producirse el mismo resultado que si llevasen flores con los sexos separados. He hecho estas pocas observaciones sobre los \u00e1rboles simplemente para llamar la atenci\u00f3n hacia el asunto.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; No sabemos qui\u00e9n ni para qu\u00e9 estar\u00eda interesado en hacer las objeciones que indica el autor en este p\u00e1rrafo. &nbsp; &nbsp; 140. \u00a0 In the case of a large tree covered with innumerable flowers, it may be objected that pollen could seldom be carried from tree to tree, and at most only from flower to flower on the same tree; and flowers on the same tree can be considered as distinct individuals only in a limited sense. I believe this objection to be valid, but that nature has largely provided against it by giving to trees a strong tendency\u2026<\/p>\n","protected":false},"author":86,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[467,14321],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":4}},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/135080"}],"collection":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/users\/86"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/comments?post=135080"}],"version-history":[{"count":5,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/135080\/revisions"}],"predecessor-version":[{"id":135083,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/135080\/revisions\/135083"}],"wp:attachment":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/media?parent=135080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/categories?post=135080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/tags?post=135080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}