{"id":2142,"date":"2012-09-18T03:19:14","date_gmt":"2012-09-17T20:19:14","guid":{"rendered":"http:\/\/antoansinhhoc.vn\/?p=2142"},"modified":"2012-09-18T03:19:14","modified_gmt":"2012-09-17T20:19:14","slug":"giam-lignin-trong-cay-trong-tiem-nang-cho-san-xuat-nhien-lieu-sinh-hoc","status":"publish","type":"post","link":"https:\/\/nbca.gov.vn\/giam-lignin-trong-cay-trong-tiem-nang-cho-san-xuat-nhien-lieu-sinh-hoc\/","title":{"rendered":"Gi\u1ea3m lignin trong c\u00e2y tr\u1ed3ng &#8211; ti\u1ec1m n\u0103ng cho s\u1ea3n xu\u1ea5t nhi\u00ean li\u1ec7u sinh h\u1ecdc"},"content":{"rendered":"<div class=\"TomTat clearfix\">\n<p>C\u00e1c nh\u00e0 khoa h\u1ecdc thu\u1ed9c Ph\u00f2ng nghi\u00ean c\u1ee9u qu\u1ed1c gia Brookhaven \u0111\u00e3 t\u1ea1o ra m\u1ed9t lo\u1ea1i enzyme m\u1edbi gi\u00fap gi\u1ea3m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 c\u00e1c ch\u1ea5t t\u1ed5ng h\u1ee3p l\u00e0 ti\u1ec1n th\u00e2n c\u1ee7a lignin, m\u1ed9t h\u1ee3p ch\u1ea5t trong th\u00e0nh t\u1ebf b\u00e0o th\u1ef1c v\u1eadt khi\u1ebfn sinh kh\u1ed1i th\u1ef1c v\u1eadt kh\u00f3 b\u1ecb ph\u00e2n hu\u1ef7. Khi \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n trong th\u1ef1c v\u1eadt, enzyme n\u00e0y l\u00e0m gi\u1ea3m l\u01b0\u1ee3ng lignin trong th\u00e0nh t\u1ebf b\u00e0o v\u00e0 t\u0103ng c\u01b0\u1eddng s\u1ef1 ph\u00e2n hu\u1ef7 sinh kh\u1ed1i t\u1ebf b\u00e0o, gi\u00fap chuy\u1ec3n ho\u00e1 sinh kh\u1ed1i th\u1ef1c v\u1eadt th\u00e0nh nhi\u00ean li\u1ec7u sinh h\u1ecdc d\u1ec5 d\u00e0ng h\u01a1n. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c \u0111\u0103ng tr\u00ean t\u1edd The Plant Cell.<\/p>\n<p>\u0110\u0103ng ng\u00e0y\u00a018-09-2012\u00a0trong chuy\u00ean m\u1ee5c\u00a0<a href=\"http:\/\/antoansinhhoc.vn\/Chuyen-muc\/Tin-the-gioi\/260\/1\">Tin th\u1ebf gi\u1edbi<\/a><\/p>\n<p>Theo nh\u00e0 sinh h\u1ecdc Chang-Jun Liu thu\u1ed9c Brookhaven, nghi\u00ean c\u1ee9u kh\u00f4ng ch\u1ec9 gi\u00fap ti\u1ebfn xa h\u01a1n trong hi\u1ec3u bi\u1ebft c\u01a1 b\u1ea3n v\u1ec1 c\u01a1 ch\u1ebf ph\u00e2n t\u1eed \u0111\u01b0a ti\u1ec1n ch\u1ea5t c\u1ee7a lignin \u0111i v\u00e0o th\u00e0nh t\u1ebf b\u00e0o m\u00e0 c\u00f2n t\u1ea1o ra gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 sinh h\u1ecdc \u0111\u1ea7y ti\u1ec1m n\u0103ng trong vi\u1ec7c ph\u00e2n hu\u1ef7 sinh kh\u1ed1i th\u1ef1c v\u1eadt.\u00a0C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 t\u1ea1o ra enzyme n\u00e0y t\u1eeb n\u0103m 2009 b\u1eb1ng c\u00e1ch bi\u1ebfn \u0111\u1ed5i ch\u1ee9c n\u0103ng c\u1ee7a m\u1ed9t enzyme c\u00f3 trong t\u1ef1 nhi\u00ean. H\u1ecd ph\u00e1t hi\u1ec7n ra r\u1eb1ng n\u1ebfu bi\u1ebfn \u0111\u1ed5i 2 v\u1ecb tr\u00ed amino axit quan tr\u1ecdng trong m\u00e3 di truy\u1ec1n c\u1ee7a enzyme n\u00e0y, s\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t enzyme m\u1edbi c\u00f3 th\u1ec3 thay \u0111\u1ed5i c\u00e1c ti\u1ec1n ch\u1ea5t t\u1ea1o n\u00ean lignin theo ph\u01b0\u01a1ng th\u1ee9c ng\u0103n ch\u00fang k\u1ebft c\u1eb7p \u0111\u1ec3 h\u00ecnh th\u00e0nh ch\u1ea5t tr\u00f9ng h\u1ee3p lignin.<\/p>\n<p>Tuy nhi\u00ean, khi \u0111\u01b0a enzyme \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i n\u00e0y v\u00e0o c\u00e2y h\u1ecd c\u1ea3i l\u1ea1i kh\u00f4ng hi\u1ec7u qu\u1ea3. Liu cho bi\u1ebft, enzyme ho\u1ea1t \u0111\u1ed9ng t\u1ed1t tr\u00ean b\u00e0n th\u00ed nghi\u1ec7m, nh\u01b0ng l\u1ea1i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng trong th\u1ef1c v\u1eadt.<\/p>\n<p>Nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng Synchrotron qu\u1ed1c gia c\u1ee7a Brookhaven \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac tinh th\u1ec3 b\u1eb1ng tia X c\u1ee7a enzyme. Cu\u1ed1i c\u00f9ng, h\u1ecd \u0111\u00e3 ph\u00e1t hi\u1ec7n ra nh\u1eefng \u0111\u1ed9t bi\u1ebfn c\u1ee7a amino axit b\u1ed5 sung, ch\u1ec9 t\u1ea1o ra m\u1ed9t thay \u0111\u1ed5i nh\u1ecf trong ph\u00f2ng th\u00ed nghi\u1ec7m nh\u01b0ng mang l\u1ea1i hi\u1ec7u qu\u1ea3 l\u1edbn trong bi\u1ec3u hi\u1ec7n \u1edf th\u1ef1c v\u1eadt.<\/p>\n<p>Enzyme m\u1edbi l\u00e0m gi\u1ea3m l\u01b0\u1ee3ng lignin trong c\u00e2y thu\u1ed9c h\u1ecd c\u1ea3i t\u1edbi 24%, gi\u00fap t\u0103ng gi\u1ea3i ph\u00f3ng \u0111\u01b0\u1eddng trong th\u00e0nh t\u1ebf b\u00e0o t\u1edbi 21%. H\u01a1n n\u1eefa, n\u00f3 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng t\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a th\u1ef1c v\u1eadt hay l\u00e0m gi\u1ea3m sinh kh\u1ed1i.<\/p>\n<p>B\u01b0\u1edbc ti\u1ebfp theo, c\u00e1c nh\u00e0 khoa h\u1ecdc s\u1ebd th\u1eed nghi\u1ec7m ch\u1ee9c n\u0103ng c\u1ee7a enzyme tr\u00ean c\u00e2y d\u01b0\u01a1ng hay c\u00e1c c\u00e2y tr\u1ed3ng l\u1ea5y n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 quan s\u00e1t vi\u1ec7c c\u1ea3i thi\u1ec7n ph\u00e2n hu\u1ef7 sinh kh\u1ed1i th\u00e0nh t\u1ebf b\u00e0o nh\u1edd gi\u1ea3m thi\u1ec3u lignin. C\u00e2y d\u01b0\u01a1ng l\u00e0 \u1ee9ng c\u1eed vi\u00ean s\u00e1ng gi\u00e1 cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p nh\u1edd kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng nhanh ch\u00f3ng v\u00e0 sinh kh\u1ed1i cao.<\/p>\n<p>Ngo\u00e0i ra, nh\u00f3m nghi\u00ean c\u1ee9u c\u00f2n ti\u1ebfp t\u1ee5c c\u1ea3i ti\u1ebfn enzyme n\u00e0y theo h\u01b0\u1edbng gi\u1ea3m c\u1ea3 hai ti\u1ec3u ph\u1ea7n ch\u00ednh c\u1ee7a lignin l\u00e0 guaiacyl v\u00e0 syringyl trong th\u00e0nh t\u1ebf b\u00e0o. Theo Liu, enzyme hi\u1ec7n t\u1ea1i l\u00e0m bi\u1ebfn \u0111\u1ed5i c\u00e1c ti\u1ec3u ph\u1ea7n ch\u00ednh c\u1ee7a lignin, t\u1eeb \u0111\u00f3 l\u00e0m gi\u1ea3m t\u1ed5ng l\u01b0\u1ee3ng lignin trong th\u1ef1c v\u1eadt nh\u01b0ng kh\u00f4ng l\u00e0m thay \u0111\u1ed5i th\u00e0nh ph\u1ea7n c\u1ee7a lignin. \u00dd t\u01b0\u1edfng ph\u00e1t tri\u1ec3n ti\u1ebfp enzyme s\u1ebd gi\u00fap bi\u1ebfn \u0111\u1ed5i ch\u00ednh x\u00e1c c\u00e1c th\u00e0nh ph\u1ea7n ligin ho\u1eb7c thay \u0111\u1ed5i c\u1ea5u tr\u00fac c\u1ee7a lignin.<\/p>\n<p>V\u1edbi th\u00e0nh c\u00f4ng trong vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n sinh t\u1ed5ng h\u1ee3p lignin trong c\u00e2y tr\u1ed3ng, c\u00e1c nh\u00e0 khoa h\u1ecdc hy v\u1ecdng s\u1ebd x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c t\u00ednh tr\u1ea1ng n\u00f4ng h\u1ecdc c\u1ee7a c\u00e2y tr\u1ed3ng chuy\u1ec3n gen th\u00e0nh ph\u1ea9m v\u00e0 khai th\u00e1c \u0111\u01b0\u1ee3c ti\u1ec1m n\u0103ng th\u01b0\u01a1ng m\u1ea1i c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng sinh kh\u1ed1i c\u1ee7a c\u00e1c d\u1ea1ng bi\u1ebfn \u0111\u1ed5i gen n\u00e0y l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t nhi\u00ean li\u1ec7u sinh h\u1ecdc.<\/p>\n<p>\u0110\u1ecdc th\u00eam t\u1ea1i http:\/\/www.bnl.gov\/bnlweb\/pubaf\/pr\/PR_display.asp?prID=1439&amp;template=Today.Theo Agbiotech.com.vn<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1c nh\u00e0 khoa h\u1ecdc thu\u1ed9c Ph\u00f2ng nghi\u00ean c\u1ee9u qu\u1ed1c gia Brookhaven \u0111\u00e3 t\u1ea1o ra m\u1ed9t lo\u1ea1i enzyme m\u1edbi gi\u00fap gi\u1ea3m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 c\u00e1c ch\u1ea5t t\u1ed5ng h\u1ee3p l\u00e0 ti\u1ec1n th\u00e2n c\u1ee7a lignin, m\u1ed9t h\u1ee3p ch\u1ea5t trong th\u00e0nh t\u1ebf b\u00e0o th\u1ef1c v\u1eadt khi\u1ebfn sinh kh\u1ed1i th\u1ef1c v\u1eadt kh\u00f3 b\u1ecb ph\u00e2n hu\u1ef7. Khi \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n [&#8230;]\n","protected":false},"author":1,"featured_media":6449,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[87],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts\/2142"}],"collection":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/comments?post=2142"}],"version-history":[{"count":0,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts\/2142\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/media\/6449"}],"wp:attachment":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/media?parent=2142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/categories?post=2142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/tags?post=2142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}