{"id":12939,"date":"2021-05-25T15:50:33","date_gmt":"2021-05-25T18:50:33","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/?p=12939"},"modified":"2023-01-05T14:33:42","modified_gmt":"2023-01-05T17:33:42","slug":"magnetic-revolution-venus-flytrap-action-potential","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/ro\/revolutie-magnetica-venus-flytrap-action-potential\/","title":{"rendered":"Revolu\u021bia magnetic\u0103: Poten\u021bialul de ac\u021biune al capcanei Venus Flytrap"},"content":{"rendered":"

Dionaea muscipula, cunoscut\u0103 popular sub numele de Venus Flytrap, este o plant\u0103 carnivor\u0103 care \u00ee\u0219i prinde prada prin intermediul frunzelor modificate. Mecanismul de ac\u021biune include mi\u0219carea rapid\u0103 a frunzei atunci c\u00e2nd prada mic\u0103 intr\u0103 \u00een contact cu ea. Aceasta se \u00eenchide imediat pentru un proces ulterior de digestie. Frunza capcanei Venus este format\u0103 din fire de p\u0103r sensibile la atingere sau fire de p\u0103r de declan\u0219are care ajut\u0103 la semnalizarea capcanei prin intermediul poten\u021bialului de ac\u021biune activat de sodiu.<\/p>\n\n\n\n

\"mai<\/a>
Sursa imaginii: Unsplash<\/a> de Dmitri Makarov<\/a>.<\/figcaption><\/figure>\n\n\n\n

Poten\u021bialul de ac\u021biune este un mijloc de semnalizare celular\u0103 care are loc atunci c\u00e2nd ionii \u00eenc\u0103rca\u021bi pozitiv p\u0103trund \u00een celule, provoc\u00e2nd o schimbare rapid\u0103 a mediului electric din membrana celular\u0103 pentru a atinge limita de prag. Aceasta, la r\u00e2ndul s\u0103u, trimite semnale electrice c\u0103tre cealalt\u0103 celul\u0103 pentru un r\u0103spuns activ. <\/p>\n\n\n\n

Semnalul este at\u00e2t de rapid \u00eenc\u00e2t prinde prada \u00een c\u00e2teva secunde. <\/p>\n\n\n\n

Prada este digerat\u0103 de enzimele eliberate de glandele de pe mucoasa frunzei. Planta absoarbe nutrien\u021bii necesari pentru a continua ac\u021biunea.<\/p>\n\n\n\n

Motivul, observa\u021bia \u0219i experimentarea:<\/strong><\/p>\n\n\n\n

La fel ca \u00een cazul creierului uman, responsabil pentru schimb\u0103rile de tensiune din anumite regiuni, care apar ca activitate electric\u0103 sub forma unor poten\u021biale de ac\u021biune care c\u0103l\u0103toresc prin celulele nervoase. Aceste activit\u0103\u021bi pot fi estimate cu ajutorul unor tehnici precum magnetoencefalografia, electroencefalografia \u0219i imagistica prin rezonan\u021b\u0103 magnetic\u0103 pentru a analiza eventualele tulbur\u0103ri \u0219i diagnosticarea acestora.<\/p>\n\n\n\n

Un grup de cercet\u0103tori interdisciplinari a eviden\u021biat activitatea magnetic\u0103 unic\u0103 a capcan\u0103 de Venus \u00een asociere cu semnalele sale electrice, \u00eentr-un mod similar cu cel al oamenilor.<\/p>\n\n\n\n

Mecanismul capcan\u0103 de Venus se bazeaz\u0103, de asemenea, pe poten\u021bialul de ac\u021biune care are ca rezultat semnale electrice \u00een sistem.<\/p>\n\n\n\n

\"Un<\/a>
Sursa imaginii: Unsplash<\/a> de Clint Patterson<\/a><\/figcaption><\/figure>\n\n\n\n

Poten\u021bialul de ac\u021biune al capcanelor Venus poate fi declan\u0219at de c\u0103ldur\u0103, frig, con\u021binut de ap\u0103 \u0219i al\u021bi factori mecanici sau de mediu. Cercet\u0103torii au folosit c\u0103ldura pentru a induce poten\u021bialul de ac\u021biune pentru a m\u0103sura c\u00e2mpul magnetic, deoarece au observat c\u0103 temperatura afecteaz\u0103 amplitudinea poten\u021bialului de ac\u021biune.<\/p>\n\n\n\n

Ace\u0219tia au folosit magnetometre atomice pentru a m\u0103sura biomagnetismul asociat cu activitatea electric\u0103. Senzorii folosi\u021bi erau celule de sticl\u0103 care erau umplute cu vapori de atomi de alcalin care r\u0103spundeau la schimb\u0103rile \u00een activitatea biomagnetic\u0103.<\/p>\n\n\n\n

Magnetometrele au nevoie de un mediu ecranat magnetic pentru a efectua m\u0103sur\u0103torile. Acesta este un pas de precau\u021bie pentru a m\u0103sura doar activitatea magnetic\u0103 a plantei multicelulare. Acest instrument este foarte eficient \u0219i este preferat magnetometrelor cu dispozitiv de interfa\u021b\u0103 cuantic\u0103 supraconductoare (SQID), deoarece acestea pot fi miniaturizate pentru o rezolu\u021bie spa\u021bial\u0103 optim\u0103 pentru m\u0103surarea datelor.<\/p>\n\n\n\n

Semnalul magnetic \u00eenregistrat de c\u0103tre cercet\u0103tori a avut o amplitudine de 0,5 picotesla, ceea ce este mult mai slab dec\u00e2t c\u00e2mpul magnetic al P\u0103m\u00e2ntului. <\/p>\n\n\n\n

Acest lucru ar putea concluziona utilitatea activit\u0103\u021bii biomagnetice, care ar putea ajuta la tehnica neinvaziv\u0103 de detectare a stresului.<\/p>\n\n\n\n

Ameliorarea culturilor este scopul final pentru a remedia efectele cauzate de factorii de mediu, cum ar fi schimb\u0103rile de temperatur\u0103, ac\u021biunea chimic\u0103 \u0219i, de asemenea, atacul erbivorelor sau al insectelor, prin detectarea feedback-ului electromagnetic. Felicit\u0103ri echipei pentru descoperirea bazei moleculare a biomagnetismului \u00een plante.<\/p>\n\n\n\n

Pentru a afla mai multe despre cercetarea lor, consulta\u021bi referin\u021ba dat\u0103 mai jos, iar pentru a citi mai multe despre poten\u021bialul de ac\u021biune, face\u021bi clic pe aici<\/a>.<\/p>\n\n\n\n

Fabricant, A., Iwata, G.Z., Scherzer, S. \u0219i colab.<\/em> Poten\u021bialele de ac\u021biune induc c\u00e2mpuri biomagnetice la plantele carnivore Venus flytrap. Sci Rep<\/em> 11, 1438 (2021). https:\/\/doi.org\/10.1038\/s41598-021-81114-w<\/a><\/p>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

Dionaea muscipula, cunoscut\u0103 popular sub numele de Venus Flytrap, este o plant\u0103 carnivor\u0103 care \u00ee\u0219i prinde prada prin intermediul frunzelor modificate. Mecanismul de ac\u021biune include mi\u0219carea rapid\u0103 a frunzei atunci c\u00e2nd prada mic\u0103 intr\u0103 \u00een contact cu ea. Aceasta se \u00eenchide imediat pentru un proces ulterior de digestie. Frunza de Venus capcan\u0103 de mu\u0219te este format\u0103 din frunze sensibile la atingere [...]<\/p>","protected":false},"author":18,"featured_media":12945,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[554],"yoast_head":"\nThe Magnetic Revolution: The Venus Flytrap Action Potential - MTG<\/title>\n<meta name=\"description\" content=\"A group of interdisciplinary researchers exhibited the unique magnetic activity of the Venus flytrap in association with its electrical signaling.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mindthegraph.com\/blog\/ro\/revolutie-magnetica-venus-flytrap-action-potential\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Magnetic Revolution: The Venus Flytrap Action Potential\" \/>\n<meta property=\"og:description\" content=\"A group of interdisciplinary researchers exhibited the unique magnetic activity of the Venus flytrap in association with its electrical signaling.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mindthegraph.com\/blog\/ro\/revolutie-magnetica-venus-flytrap-action-potential\/\" \/>\n<meta property=\"og:site_name\" content=\"Mind the Graph Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-05-25T18:50:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-01-05T17:33:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2021\/05\/post-the-magnetic-revolution-facebook.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Bruna Soldera\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"The Magnetic Revolution: The Venus Flytrap Action Potential\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2021\/05\/post-the-magnetic-revolution-twitter.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bruna Soldera\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"The Magnetic Revolution: The Venus Flytrap Action Potential - 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