{"id":618,"date":"2010-04-28T04:14:28","date_gmt":"2010-04-28T11:14:28","guid":{"rendered":"http:\/\/mikelberman.com\/blog\/?p=618"},"modified":"2010-04-28T04:18:36","modified_gmt":"2010-04-28T11:18:36","slug":"geotropic-experiments","status":"publish","type":"post","link":"http:\/\/mikelberman.com\/blog\/?p=618","title":{"rendered":"Geotropic Experiments"},"content":{"rendered":"<p>Excerpt from Wikipedia <a href=\"http:\/\/en.wikipedia.org\/wiki\/Gravitropism\">entry<\/a>:<\/p>\n<p>&#8220;<strong>Gravitropism<\/strong> (or\u00a0<strong>geotropism<\/strong>) is a turning or growth movement by a\u00a0<a title=\"Plant\" href=\"http:\/\/en.wikipedia.org\/wiki\/Plant\">plant<\/a> or\u00a0<a title=\"Fungus\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fungus\">fungus<\/a> in response to\u00a0<a title=\"Gravity\" href=\"http:\/\/en.wikipedia.org\/wiki\/Gravity\">gravity<\/a>.\u00a0<a title=\"Charles Darwin\" href=\"http:\/\/en.wikipedia.org\/wiki\/Charles_Darwin\">Charles Darwin<\/a> was one of the first to scientifically document that\u00a0<a title=\"Root\" href=\"http:\/\/en.wikipedia.org\/wiki\/Root\">roots<\/a> show\u00a0<em>positive gravitropism<\/em> and stems show\u00a0<em>negative gravitropism<\/em>. That is,\u00a0<a title=\"Root\" href=\"http:\/\/en.wikipedia.org\/wiki\/Root\">roots<\/a> grow in the direction of gravitational pull (i.e., downward) and\u00a0<a title=\"Plant stem\" href=\"http:\/\/en.wikipedia.org\/wiki\/Plant_stem\">stems<\/a> grow in the opposite direction (i.e., upwards). This behaviour can be easily demonstrated with a potted plant. When laid onto its side, the growing parts of the\u00a0<a title=\"Plant stem\" href=\"http:\/\/en.wikipedia.org\/wiki\/Plant_stem\">stem<\/a> begin to display negative gravitropism, bending (biologists say, turning; see\u00a0<a title=\"Tropism\" href=\"http:\/\/en.wikipedia.org\/wiki\/Tropism\">tropism<\/a>) upwards.&#8221;<\/p>\n<p>A good friend of mine and experienced carpenter,\u00a0<a href=\"http:\/\/idblab.blogspot.com\/\">Matt Richard<\/a>,\u00a0helped to design and fabricate a rotating planter. \u00a0I was fretting about engineering a three-axis apparatus for a weeks. \u00a0Matt talked some sense into me, suggesting that I fabricate immediately, and settle for one-axis of rotation for a proof of concept. \u00a0After we finished the design, we realized that we could rotate the plant inside the holder, making it a dual axis planter. \u00a0Thanks Matt!<\/p>\n<p>I have &#8220;before&#8221; picture on my phone. \u00a0Soon to come.<\/p>\n<p>In the meantime, check out the result after ~ 1 wk!<\/p>\n<div style=\"width: 510px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/farm4.static.flickr.com\/3428\/4559756097_444876f991_b.jpg\"><img loading=\"lazy\" decoding=\"async\" title=\"After\" src=\"http:\/\/farm4.static.flickr.com\/3428\/4559756097_444876f991.jpg\" alt=\"\" width=\"500\" height=\"375\" \/><\/a><p class=\"wp-caption-text\">Eureka!<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Excerpt from Wikipedia entry: &#8220;Gravitropism (or\u00a0geotropism) is a turning or growth movement by a\u00a0plant or\u00a0fungus in response to\u00a0gravity.\u00a0Charles Darwin was one of the first to scientifically document that\u00a0roots show\u00a0positive gravitropism and stems show\u00a0negative gravitropism. That is,\u00a0roots grow in the direction of gravitational pull (i.e., downward) and\u00a0stems grow in the opposite direction (i.e., upwards). This behaviour [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[127],"tags":[],"class_list":["post-618","post","type-post","status-publish","format-standard","hentry","category-grow-it-yourself"],"_links":{"self":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=618"}],"version-history":[{"count":3,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/618\/revisions"}],"predecessor-version":[{"id":620,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/618\/revisions\/620"}],"wp:attachment":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=618"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}