{"id":797,"date":"2014-10-31T10:17:53","date_gmt":"2014-10-31T14:17:53","guid":{"rendered":"\/\/phytochemia.com\/?p=797"},"modified":"2014-10-31T10:17:53","modified_gmt":"2014-10-31T14:17:53","slug":"the-importance-of-plant-identification-part-3","status":"publish","type":"articles-de-blogue","link":"https:\/\/phytochemia.com\/en\/articles-de-blogue\/the-importance-of-plant-identification-part-3\/","title":{"rendered":"The importance of plant identification &#8211; Part 3"},"content":{"rendered":"<div data-blogger-escaped-style=\"text-align: justify;\">\n<p><i>Hubert Marceau &#8211; Popularization<\/i><\/p>\n<\/div>\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<table class=\"tr-caption-container\" style=\"float: right; margin-left: 1em; text-align: right;\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><a style=\"margin-left: auto; margin-right: auto;\" href=\"http:\/\/2.bp.blogspot.com\/--DFrYOL0a20\/VFKXgOa9DcI\/AAAAAAAAEb8\/UXPxC25qkWg\/s1600\/640px-Tomatoes_plain_and_sliced.jpg\"><img decoding=\"async\" src=\"https:\/\/2.bp.blogspot.com\/--DFrYOL0a20\/VFKXgOa9DcI\/AAAAAAAAEb8\/UXPxC25qkWg\/s1600\/640px-Tomatoes_plain_and_sliced.jpg\" width=\"80\" height=\"200\" border=\"0\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td class=\"tr-caption\" style=\"font-size: 13px; text-align: center;\"><b>Figure 1:<\/b>\u00a0<i>S. lycopersicum<\/i>\u00a0(<a href=\"http:\/\/commons.wikimedia.org\/wiki\/Solanum_lycopersicum#mediaviewer\/File:Tomatoes_plain_and_sliced.jpg\" target=\"_blank\" rel=\"noopener noreferrer\">Source<\/a>)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">Have you ever heard of <a href=\"http:\/\/blog.thompson-morgan.com\/gardening-news\/tomtato-harvest-potatoes-and-tomatoes-from-the-same-plant\/\" data-blogger-escaped-target=\"_blank\">Tomtatoes<\/a>? It is tomato plant, <a href=\"http:\/\/en.wikipedia.org\/wiki\/Tomato\" data-blogger-escaped-target=\"_blank\"><i>Solanum lycopersicum<\/i><\/a> (Figure 1), graft on a potato plant, <a href=\"http:\/\/en.wikipedia.org\/wiki\/Potato\" data-blogger-escaped-target=\"_blank\"><i>Solanum tuberosum<\/i><\/a>. This gives a plant that bear edible roots (tubers to be more precise) and fruits. Why not start using all the rest and make a salad with the leaves? Some of you may have already spotted the bad idea in this last sentence, for the other, know that the tomato plant, just like tobacco (<a href=\"http:\/\/en.wikipedia.org\/wiki\/Nicotiana_tabacum\" data-blogger-escaped-target=\"_blank\"><i>Nicotiana tabacum<\/i><\/a>), the pepper (<a href=\"http:\/\/en.wikipedia.org\/wiki\/Capsicum_annuum\" data-blogger-escaped-target=\"_blank\"><i>Capsicum annuum<\/i><\/a>), the datura (<a href=\"http:\/\/en.wikipedia.org\/wiki\/Datura_stramonium\" data-blogger-escaped-target=\"_blank\"><i>Datura stramonium<\/i><\/a>), the deadly nighshade (<a href=\"http:\/\/en.wikipedia.org\/wiki\/Atropa_belladonna\" data-blogger-escaped-target=\"_blank\"><i>Atropa belladona<\/i><\/a>)&#8230; are part of the <a href=\"http:\/\/en.wikipedia.org\/wiki\/Solanaceae\" data-blogger-escaped-target=\"_blank\">Solanaceae<\/a> family and produce <a href=\"http:\/\/en.wikipedia.org\/wiki\/Solanaceae#Alkaloids\" data-blogger-escaped-target=\"_blank\">toxics alkaloids<\/a>. Generally, potatoes contains a negligible amount of <a href=\"http:\/\/en.wikipedia.org\/wiki\/Solanine\" data-blogger-escaped-target=\"_blank\">solanine<\/a> (and others toxic glycoalkaloids) <i>[Edit: \/u\/thalassa <a href=\"http:\/\/www.nytimes.com\/2009\/07\/29\/dining\/29curi.html?_r=2&amp;\" data-blogger-escaped-target=\"_blank\">made me notice<\/a> that tomato leaves don&#8217;t contain solanine but <a href=\"http:\/\/en.wikipedia.org\/wiki\/Tomatine\" data-blogger-escaped-target=\"_blank\">tomatine<\/a>, a non toxic analog.]<\/i> , but can sometime produce more when they are in bad storage condition. There are known <a href=\"http:\/\/www.cbif.gc.ca\/eng\/species-bank\/canadian-poisonous-plants-information-system\/all-plants-common-name\/potato\/?id=1370403267176\" data-blogger-escaped-target=\"_blank\">potato poisoning case<\/a>, but they are very uncommon. Basically, you must not eat the tuber when they are green.<\/p>\n<\/div>\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<p style=\"text-align: justify;\">This post is not directly related to botanical identification, but I wanted to give you examples of some preconception that we may have on the security of plants. I will be using the toxicity of some of them considered edible. In the case of common foodstuff, the toxic effect often appears after over-consumption, a nutritional imbalance, or a predisposed condition.<\/p>\n<\/div>\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<p style=\"text-align: justify;\">Our first case is carambolas, <a href=\"http:\/\/en.wikipedia.org\/wiki\/Averrhoa_carambola\" data-blogger-escaped-target=\"_blank\"><i>Averrhoa carambola<\/i><\/a> (Figure 2). The star fruit is known to be toxic to people with kidneys troubles <a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1046\/j.1445-5994.2003.00402.x\/abstract?deniedAccessCustomisedMessage=&amp;userIsAuthenticated=false\" data-blogger-escaped-target=\"_blank\">since the 80&#8217;s<\/a>. Scientist have long thought that the toxic compound was <a href=\"http:\/\/en.wikipedia.org\/wiki\/Oxalic_acid\" data-blogger-escaped-target=\"_blank\">oxalic acid<\/a>. It is <a href=\"http:\/\/www.chtf.stuba.sk\/~szolcsanyi\/education\/files\/Organicka%20chemia%20II\/Prednaska%208_Aminokyseliny%20a%20peptidy\/Doplnkove%20studijne%20materialy\/Structure%20and%20properties%20of%20amino%20acids%20and%20peptides\/Elucidating%20the%20Neurotoxicity%20of%20the%20Star%20Fruit.pdf\" data-blogger-escaped-target=\"_blank\">only in 2013<\/a> that the real culprit was identified: <a href=\"http:\/\/en.wikipedia.org\/wiki\/Caramboxin\" data-blogger-escaped-target=\"_blank\">caramboxin<\/a>. This compound cause hiccups, neurologic and gastric problems, and confusion. People with renal problems are particularly sensitive because the kidney can&#8217;t filter the product, but <a href=\"http:\/\/ckj.oxfordjournals.org\/content\/2\/6\/485.short\" data-blogger-escaped-target=\"_blank\">there have been reported cases<\/a>\u00a0of intoxication in healthy peoples after large consumption of the fruit. In these case, oxalic acid also had a toxic effect since it is dangerous in large quantity.<\/p>\n<figure id=\"attachment_799\" aria-describedby=\"caption-attachment-799\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-799\" src=\"\/\/phytochemia.com\/wp-content\/uploads\/2016\/11\/1280px-Carambola_Starfruit-750x378.jpg\" alt=\"Figure 2: A. carambola (Source)\" width=\"750\" height=\"378\" \/><figcaption id=\"caption-attachment-799\" class=\"wp-caption-text\"><span class=\"legende\"><strong>Figure 2:<\/strong> A. carambola (<a href=\"http:\/\/commons.wikimedia.org\/wiki\/Category:Star_fruit#mediaviewer\/File:Carambola_Starfruit.jpg\">Source<\/a>)<\/span><\/figcaption><\/figure>\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<p style=\"text-align: justify;\">Since we are on the subject of oxalic acid, I would like to point out that rhubarb, <a href=\"http:\/\/en.wikipedia.org\/wiki\/Rhubarb\" data-blogger-escaped-target=\"_blank\">Rheum rhabarbarum<\/a>, also contains a lot of this compound.<\/p>\n<\/div>\n<div data-blogger-escaped-style=\"text-align: justify;\">\n<p style=\"text-align: justify;\">Let&#8217;s continue with a case a little bit more known: nutmeg (<i><a href=\"http:\/\/en.wikipedia.org\/wiki\/Myristica_fragrans\" data-blogger-escaped-target=\"_blank\">Myristica fragrans<\/a><\/i>). This spice contains <a href=\"http:\/\/en.wikipedia.org\/wiki\/Myristicin\" data-blogger-escaped-target=\"_blank\">myristicin<\/a> and <a href=\"http:\/\/en.wikipedia.org\/wiki\/Elemicin\" data-blogger-escaped-target=\"_blank\">elemicin<\/a> who are both considered to be psychotropic. While it has never been proven, we suppose that the two are turned by the body into <a href=\"http:\/\/en.wikipedia.org\/wiki\/MMDA_(drug)\" data-blogger-escaped-target=\"_blank\">MMDA<\/a> and <a href=\"http:\/\/en.wikipedia.org\/wiki\/Trimethoxyamphetamine\" data-blogger-escaped-target=\"_blank\">TMA<\/a>, two close derivative of <a href=\"http:\/\/en.wikipedia.org\/wiki\/MDMA\" data-blogger-escaped-target=\"_blank\">MDMA <\/a>(also know as Ecstasy). Due to their hallucinogenic properties, nutmeg intoxication are <a href=\"http:\/\/bitnest.ca\/external.php?id=%257DbxWfXSC%251B%2500%2501ryy%2501%2505IYQ%2503UWr%257Ba%2517Ti\" data-blogger-escaped-target=\"_blank\">usually voluntary<\/a> but there are <a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC1285340\/\" data-blogger-escaped-target=\"_blank\">known involuntary case<\/a>. Involuntary case are pretty rare since they require a large quantity: 5 to 10 g, which correspond to a complete nut.<\/p>\n<table class=\"tr-caption-container\" style=\"float: left; margin-right: 1em;\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><a style=\"clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;\" href=\"http:\/\/2.bp.blogspot.com\/-QjTE5QCXTcY\/VFKarFf839I\/AAAAAAAAEcQ\/q7pXPOyM9Oo\/s1600\/Eskimo_Potato_(7833274266).jpg\"><img decoding=\"async\" src=\"https:\/\/2.bp.blogspot.com\/-QjTE5QCXTcY\/VFKarFf839I\/AAAAAAAAEcQ\/q7pXPOyM9Oo\/s1600\/Eskimo_Potato_(7833274266).jpg\" width=\"133\" height=\"200\" border=\"0\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td class=\"tr-caption\" style=\"font-size: 13px; text-align: center;\"><b>Figure 3:<\/b>\u00a0<i>H. alpinum<\/i>\u00a0(<a href=\"http:\/\/commons.wikimedia.org\/wiki\/Category:Hedysarum_alpinum#mediaviewer\/File:Eskimo_Potato_(7833274266).jpg\" target=\"_blank\" rel=\"noopener noreferrer\">Source<\/a>)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"text-align: justify;\">\u00a0Finally, lets talk about <a href=\"http:\/\/en.wikipedia.org\/wiki\/Christopher_McCandless\" data-blogger-escaped-target=\"_blank\">Christopher McCandless<\/a>, the late protagoniste of the movie <a href=\"http:\/\/en.wikipedia.org\/wiki\/Into_the_Wild_(film)\" data-blogger-escaped-target=\"_blank\">Into the Wild<\/a>. Christopher was a young american who, at the age of 24, decided to live the complete summer of 1992 in the Alaska wilderness to live by himself off the land. He was found dead 4 months later. It was believe for a long time that the cause of his death was a confusion between two wild plants that he was using for food: <i><a href=\"http:\/\/en.wikipedia.org\/wiki\/Hedysarum_alpinum\" data-blogger-escaped-target=\"_blank\">Hedysarum alpinum<\/a><\/i> (edible, figure 3) and <a href=\"http:\/\/en.wikipedia.org\/wiki\/Hedysarum_boreale\" data-blogger-escaped-target=\"_blank\"><i>Hedysarum boreale <\/i>spp.<i> mackenziei<\/i><\/a> (toxic, figure 4). However, a <a href=\"http:\/\/www.newyorker.com\/books\/page-turner\/how-chris-mccandless-died\" data-blogger-escaped-target=\"_blank\">more complete analysis of the case<\/a> tend to demonstrate that he died of <a href=\"http:\/\/en.wikipedia.org\/wiki\/Lathyrism\" data-blogger-escaped-target=\"_blank\">lathyrism<\/a>. The seed of <i>H. alpinum<\/i> contains <a href=\"http:\/\/en.wikipedia.org\/wiki\/Oxalyldiaminopropionic_acid\" data-blogger-escaped-target=\"_blank\">oxalyldiaminopropionic acid<\/a> (ODAP). This amino acid is generally non-toxic, but when consumed in large quantity and the body is stressed, undernourished or starving, it create a degeneration of motors neurons and paralysis. This would have effectively stopped Christopher from being able to forage, eventually starving him to death. The presence of this compound in the seed of <i>H. alpinum<\/i> was confirmed in 2014. Christopher had no way of knowing the toxicity of the plant.<\/p>\n<figure id=\"attachment_801\" aria-describedby=\"caption-attachment-801\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-801 size-medium\" src=\"\/\/phytochemia.com\/wp-content\/uploads\/2016\/11\/Wild_Sweet_Pea_7833498338-750x500.jpg\" alt=\"Figure 3: H. boreale (Source)\" width=\"750\" height=\"500\" \/><figcaption id=\"caption-attachment-801\" class=\"wp-caption-text\"><span class=\"legende\">Figure 3: H. boreale (<a href=\"http:\/\/commons.wikimedia.org\/wiki\/Category:Hedysarum_boreale#mediaviewer\/File:Wild_Sweet_Pea_(7833498338).jpg\">Source<\/a>)<\/span><\/figcaption><\/figure>\n<p style=\"text-align: justify;\">In most case, the toxic compounds are unknown or only suspected. In others, uncommon interactions cause dangerous effects. Sometimes, a compounds that we think to be the cause of a biological activity is in fact hiding another (we call this internally the &#8220;Vakhtang effect&#8221;). All these situation demonstrate that the toxicity of plants is often not well understood. For most case the only security that we have is still the same that our ancestors had: if you didn&#8217;t die when you ate it, that means that I can eat it.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"template":"","categories-darticle":[31],"class_list":["post-797","articles-de-blogue","type-articles-de-blogue","status-publish","hentry","categories-darticle-popularization"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The importance of plant identification - Part 3 - PhytoChemia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/phytochemia.com\/en\/articles-de-blogue\/the-importance-of-plant-identification-part-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The importance of plant identification - Part 3 - PhytoChemia\" \/>\n<meta property=\"og:description\" content=\"Hubert Marceau &#8211; Popularization Figure 1:\u00a0S. lycopersicum\u00a0(Source) Have you ever heard of Tomtatoes? It is tomato plant, Solanum lycopersicum (Figure 1), graft on a potato plant, Solanum tuberosum. This gives a plant that bear edible roots (tubers to be more precise) and fruits. 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Popularization Figure 1:\u00a0S. lycopersicum\u00a0(Source) Have you ever heard of Tomtatoes? It is tomato plant, Solanum lycopersicum (Figure 1), graft on a potato plant, Solanum tuberosum. This gives a plant that bear edible roots (tubers to be more precise) and fruits. Why not start using all the rest and make a salad with [&hellip;]","og_url":"https:\/\/phytochemia.com\/en\/articles-de-blogue\/the-importance-of-plant-identification-part-3\/","og_site_name":"PhytoChemia","article_publisher":"https:\/\/www.facebook.com\/phytochemia","article_published_time":"2014-10-31T14:17:53+00:00","og_image":[{"url":"https:\/\/2.bp.blogspot.com\/--DFrYOL0a20\/VFKXgOa9DcI\/AAAAAAAAEb8\/UXPxC25qkWg\/s1600\/640px-Tomatoes_plain_and_sliced.jpg","type":"","width":"","height":""}],"author":"Alexis St-Gelais","twitter_card":"summary_large_image","twitter_creator":"@PhytoChemia","twitter_site":"@PhytoChemia","twitter_misc":{"Written by":"Alexis St-Gelais","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/phytochemia.com\/en\/articles-de-blogue\/the-importance-of-plant-identification-part-3\/#article","isPartOf":{"@id":"https:\/\/phytochemia.com\/en\/articles-de-blogue\/the-importance-of-plant-identification-part-3\/"},"author":{"name":"Alexis St-Gelais","@id":"https:\/\/phytochemia.com\/en\/#\/schema\/person\/a98b87fdc34fc637f6c0d24647c6c362"},"headline":"The importance of plant identification &#8211; 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