{"id":6684,"date":"2014-10-01T09:33:14","date_gmt":"2014-10-01T02:33:14","guid":{"rendered":"http:\/\/antoansinhhoc.vn\/?p=1555"},"modified":"2014-10-01T09:33:14","modified_gmt":"2014-10-01T02:33:14","slug":"gen-dog1-delay-of-germination-1-tao-ra-co-che-duy-tri-tinh-ngu-nghi-cua-hat-thich-ung-voi-nhiet-do-va-su-dieu-khien-ham-luong-gibberellin-co-tinh-chat-bi-le-thuoc-trong-su-nay-mam-cua-hat","status":"publish","type":"post","link":"https:\/\/nbca.gov.vn\/gen-dog1-delay-of-germination-1-tao-ra-co-che-duy-tri-tinh-ngu-nghi-cua-hat-thich-ung-voi-nhiet-do-va-su-dieu-khien-ham-luong-gibberellin-co-tinh-chat-bi-le-thuoc-trong-su-nay-mam-cua-hat\/","title":{"rendered":"Gen DOG1 (DELAY OF GERMINATION 1) t\u1ea1o ra c\u01a1 ch\u1ebf duy tr\u00ec t\u00ednh ng\u1ee7 ngh\u1ec9 c\u1ee7a h\u1ea1t th\u00edch \u1ee9ng v\u1edbi nhi\u1ec7t \u0111\u1ed9 v\u00e0 s\u1ef1 \u0111i\u1ec1u khi\u1ec3n h\u00e0m l\u01b0\u1ee3ng gibberellin c\u00f3 t\u00ednh ch\u1ea5t b\u1ecb l\u1ec7 thu\u1ed9c, trong s\u1ef1 n\u1ea9y m\u1ea7m c\u1ee7a h\u1ea1t"},"content":{"rendered":"
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Kai Graeber v\u00e0 ctv. (2014) \u0111\u00e3 c\u00f4ng b\u1ed1 nghi\u00ean c\u1ee9u n\u00eau tr\u00ean tr\u00ean t\u1ea1p ch\u00ed PNAS August 26, 2014; Vol.111; No.34: E3571\u2013E3580, v\u1ec1 c\u01a1 ch\u1ebf sinh l\u00fd t\u00ednh mi\u00ean tr\u1ea1ng c\u1ee7a h\u1ea1t.<\/span><\/p>\n<\/div>\n

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C\u01a1 ch\u1ebf ng\u1ee7 ngh\u1ec9 (mi\u00ean tr\u1ea1ng) c\u1ee7a h\u1ea1t th\u1ef1c v\u1eadt \u0111\u00e3 ti\u1ebfn h\u00f3a l\u00e0m tr\u00ec ho\u00e3n s\u1ef1 n\u1ea9y m\u1ea7m khi m\u00f9a v\u1ee5 th\u00edch h\u1ee3p \u0111\u1ec3 t\u0103ng tr\u01b0\u1edfng c\u00e2y con. Th\u1eddi gian n\u1ea9y m\u1ea7m l\u00e0 t\u00edch th\u00edch nghi r\u1ea5t quan tr\u1ecdng \u2013 l\u00e0 t\u00ednh tr\u1ea1ng bi\u1ec3u hi\u1ec7n s\u1edbm nh\u1ea5t trong cu\u1ed9c \u0111\u1eddi c\u1ee7a c\u00e2y. N\u00f3 quy\u1ebft \u0111\u1ecbnh s\u1ef1 th\u1ed1ng nh\u1ea5t c\u1ee7a c\u00e2y v\u1edbi h\u1ec7 th\u1ed1ng sinh th\u00e1i n\u00f4ng nghi\u1ec7p v\u00e0 b\u1ea3n ch\u1ea5t c\u1ee7a t\u1ef1 nhi\u00ean.<\/p>\n

Gen\u00a0DELAY OF GERMINATION 1<\/strong><\/em>\u00a0(DOG1<\/em>)<\/strong>\u00a0c\u00f3 bi\u1ebfn d\u1ecb di truy\u1ec1n trong t\u1ef1 nhi\u00ean v\u1ec1 mi\u00ean tr\u1ea1ng c\u1ee7a h\u1ea1t, l\u00e0 gen \u0111\u1eb7c bi\u1ec7t th\u1ee9 nh\u1ea5t \u0111\u01b0\u1ee3c d\u00f2ng h\u00f3a th\u00e0nh c\u00f4ng. N\u00f3 m\u00e3 h\u00f3a m\u1ed9t protein ch\u01b0a bi\u1ebft r\u00f5 ch\u1ee9c n\u0103ng. C\u00e1c t\u00e1c gi\u1ea3 \u0111\u00e3 ch\u1ee9ng minh r\u1eb1ng gen\u00a0DOG1<\/strong>\u00a0\u0111i\u1ec1u khi\u1ec3n mi\u00ean tr\u1ea1ng c\u1ee7a nhi\u1ec1u lo\u00e0i th\u1ef1c v\u1eadt kh\u00e1c nhau nh\u1edd b\u1eadt t\u1eaft c\u1eeda s\u1ed5 nhi\u1ec7t \u0111\u1ed9 t\u1ed1i h\u1ea3o \u1edf xung quanh khi n\u1ea9y m\u1ea7m. Th\u1eddi kh\u1eafc \u1ea5y c\u00f3 \u0111\u01b0\u1ee3c nh\u1edd s\u1ef1 thay \u0111\u1ed5i c\u00f3 t\u00ednh ch\u1ea5t \u0111i\u1ec1u ki\u1ec7n c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed1i v\u1edbi s\u1ef1 bi\u1ebfn d\u01b0\u1ee1ng c\u1ee7a k\u00edch th\u00edch t\u1ed1\u00a0gibberellin<\/strong>, d\u1eabn \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i c\u1ee7a c\u00e1c gen c\u00f3 ch\u1ee9c n\u0103ng l\u00e0m suy y\u1ebfu m\u00e0ng ph\u1ee7 b\u00ean ngo\u00e0i h\u1ea1t gi\u1ed1ng ph\u1ea7n bao b\u1ecdc ph\u00f4i m\u1ea7m. C\u01a1 ch\u1ebf mi\u00ean tr\u1ea1ng c\u1ee7a v\u00f5 bao c\u00f3 t\u00ednh ch\u1ea5t b\u1ea3o th\u1ee7 \u1ea5y \u0111\u01b0\u1ee3c v\u1eadn \u0111\u1ed9ng b\u1edfi DOG1, ch\u00fang ki\u1ec3m so\u00e1t th\u1eddi kh\u1eafc n\u1ea9y m\u1ea7m c\u1ee7a h\u1ea1t v\u1edbi nhi\u1ec7t \u0111\u1ed9 th\u00edch h\u1ee3p. S\u1ef1 n\u1ea9y m\u1ea7m c\u1ee7a h\u1ea1t l\u00e0 m\u1ed9t n\u1ed9i dung quan tr\u1ecdng trong chu k\u1ef3 s\u1ed1ng c\u1ee7a th\u1ef1c v\u1eadt v\u00ec n\u00f3 x\u00e1c \u0111\u1ecbnh s\u1ef1 s\u1ed1ng c\u00f2n c\u1ee7a th\u1ebf h\u1ec7 k\u1ebf ti\u1ebfp.<\/p>\n

\u0110\u1ec3 ph\u00e1t hi\u1ec7n \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng gian v\u00e0 th\u1eddi gian t\u1ed1i h\u1ea3o cho n\u1ea9y m\u1ea7m, h\u1ea1t gi\u1ed1ng ho\u1ea1t \u0111\u1ed9ng nh\u01b0 nh\u1eefng sensors c\u1ee7a m\u00f4i tr\u01b0\u1eddng v\u00f4 c\u00f9ng tinh t\u1ebf \u00a0h\u1ee3p nh\u1ea5t c\u00e1c th\u00f4ng tin th\u00ed d\u1ee5 nh\u01b0 nhi\u1ec7t \u0111\u1ed9 \u1edf xung quanh. Ng\u01b0\u1eddi ta ch\u1ee9ng minh r\u1eb1ng gen\u00a0DELAY OF GERMINATION 1<\/strong><\/em>\u00a0(DOG1<\/em>)<\/strong>, c\u00f3 ch\u1ee9c n\u0103ng gi\u00fap c\u00e2y th\u00edch \u1ee9ng v\u1edbi mi\u00ean tr\u1ea1ng trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau v\u1ec1 m\u00f4i tr\u01b0\u1eddng, x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 t\u1ed1i h\u1ea3o cho n\u1ea9y m\u1ea7m.<\/p>\n

Th\u00f4ng qua th\u00ed nghi\u1ec7m v\u1ec1 s\u1ef1 trao \u0111\u1ed5i thu\u1eadn ngh\u1ecbch c\u1ee7a gen (reciprocal gene-swapping<\/strong>) gi\u1eefa c\u00e1c lo\u00e0i c\u1ee7a Brassicaceae, c\u01a1 ch\u1ebf mi\u00ean tr\u1ea1ng d\u1ef1a tr\u00ean c\u01a1 s\u1edf\u00a0DOG1\u00a0<\/strong>lu\u00f4n \u0111\u01b0\u1ee3c b\u1ea3o t\u1ed3n. C\u00e1c ph\u00e2n t\u00edch h\u00f3a sinh cho th\u1ea5y c\u01a1 ch\u1ebf \u1ea5y \u0111i\u1ec1u h\u00f2a nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a v\u1eadt ch\u1ea5t trong ph\u00f4i nh\u0169, m\u1ed9t m\u00e0ng bao c\u1ee7a m\u00f4 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng nh\u01b0 m\u1ed9t v\u1eadt c\u1ea3n (germination barrier) s\u1ef1 n\u1ea9y m\u1ea7m \u0111\u1ec3 ki\u1ec3m so\u00e1t \u201ccoat dormancy<\/strong>\u201d (mi\u00ean tr\u1ea1ng c\u1ee7a v\u00f5 bao). DOG1 \u1ee9c ch\u1ebf s\u1eef th\u1ec3 hi\u1ec7n c\u1ee7a c\u00e1c gen m\u00e3 h\u00f3a\u00a0gibberellin (GA),\u00a0<\/strong>m\u00e3 h\u00f3a c\u00e1c protein t\u00e1i l\u1eadp tr\u00ecnh th\u00e0nh t\u1ebf b\u00e0o trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh n\u00e0o \u0111\u00f3. H\u01a1n n\u1eefa, DOG1 c\u00f2n g\u00e2y ra nh\u1eefng thay \u0111\u1ed5i t\u00f9y theo nhi\u1ec7t \u0111\u1ed9 b\u00ean ngo\u00e0i trong c\u01a1 ch\u1ebf bi\u1ebfn d\u01b0\u1ee1ng GA c\u1ee7a h\u1ea1t. Nh\u1eefng thay \u0111\u1ed5i c\u01a1 ch\u1ebf c\u1ee7a hormone \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111i nh\u1edd c\u00e1c gen kh\u00e1c nhau tr\u00ean c\u01a1 s\u1edf thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9, c\u00e1c gen \u1ea5y m\u00e3 h\u00f3a nh\u1eefng enzymes c\u01a1 b\u1ea3n trong l\u1ed9 tr\u00ecnh sinh t\u1ed5ng h\u1ee3p GA. Nh\u1eefng \u1ea3nh h\u01b0\u1edfng c\u1ee7a\u00a0DOG1<\/strong>\u00a0l\u00e0m cho s\u1ef1 \u0111i\u1ec1u khi\u1ec3n c\u1ee7a ph\u00f4i nh\u0169 tr\u00ean c\u01a1 s\u1edf thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 tr\u1edf n\u00ean y\u1ebfu h\u01a1n v\u00e0 kh\u1eb3ng \u0111\u1ecbnh \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 n\u00e0o t\u1ed1i h\u1ea3o cho n\u1ea9y m\u1ea7m. C\u01a1 ch\u1ebf c\u00f3 t\u00ednh ch\u1ea5t b\u1ea3o th\u1ee7 \u1ea5y c\u1ee7a DOG1 \u0111\u1ed1i v\u1edbi \u201ccoat-dormancy<\/strong>\u201d cung c\u1ea5p m\u1ed9t c\u01a1 ch\u1ebf si\u00eau nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec7t \u0111\u1ed9 trong \u0111i\u1ec1u khi\u1ec3n th\u1eddi kh\u1eafc m\u00e0 h\u1ea1t s\u1ebd n\u1ea9y m\u1ea7m.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Kai Graeber v\u00e0 ctv. (2014) \u0111\u00e3 c\u00f4ng b\u1ed1 nghi\u00ean c\u1ee9u n\u00eau tr\u00ean tr\u00ean t\u1ea1p ch\u00ed PNAS August 26, 2014; Vol.111; No.34: E3571\u2013E3580, v\u1ec1 c\u01a1 ch\u1ebf sinh l\u00fd t\u00ednh mi\u00ean tr\u1ea1ng c\u1ee7a h\u1ea1t. C\u01a1 ch\u1ebf ng\u1ee7 ngh\u1ec9 (mi\u00ean tr\u1ea1ng) c\u1ee7a h\u1ea1t th\u1ef1c v\u1eadt \u0111\u00e3 ti\u1ebfn h\u00f3a l\u00e0m tr\u00ec ho\u00e3n s\u1ef1 n\u1ea9y m\u1ea7m khi m\u00f9a v\u1ee5 th\u00edch […]\n","protected":false},"author":1,"featured_media":6342,"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\/6684"}],"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=6684"}],"version-history":[{"count":0,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts\/6684\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/media\/6342"}],"wp:attachment":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/media?parent=6684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/categories?post=6684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/tags?post=6684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}