BIOSINTESIS SITOKININ PDF

Hormon tumbuhan atau fitohormon merupakan sekumpulan molekul isyarat organik yang terdapat dalam tumbuhan dengan jumlah yang amat kecil. Hormon-hormon ini dapat mempengaruhi pertumbuhan, pembiakan dan pergerakan sesebuah tumbuhan. Jenis-jenis hormon tumbuhan yang utama termasuklah asid absisik , auksin , sitokinin , etilena dan giberelin. Asid absisik berperanan penting dalam penghambatan pertumbuhan tumbuhan. Selain itu, asid ini juga berperanan dalam penutupan stoma ketika tumbuhan mengalami kehilangan air. Asid salisilik ialah hormon yang berbentuk seperti fenol , dan berperanan dalam pertahanan tumbuhan menentang patogen biotropika.

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Transgenic rice plants were generated using particle bombardment to introduce the Agrobacterium cytokinin biosynthesis gene driven by Arabidopsis Arabidopsis thaliana senescence specific promoter SAG12 for delaying leaf senescence. Using two plasmids we co-transformed one week old embryogenic calli derived from mature Japonica rice Oryza sativa variety Chin Guang.

A complex integration pattern for all the transgenes including the multiple copies integration was predominantly observed. Pokok padi transgenik telah dijanakan menggunakan pembedilan partikel untuk memperkenalkan gen biosintesis sitokinin Agrobacterium yang dipacu oleh promoter spesifik kesenesensan Arabidopsis Arabidopsis thaliana iaitu SAG12 , yang berfungsi untuk melengahkan kesenesensan daun. Dengan menggunakan dua plasmid, kalus embriogeni berumur satu minggu yang diambil dari padi Japonica Oryza sativa varieti Chin Guang matang telah ditransformasi.

Satu corak integrasi yang kompleks untuk semua transgen termasuk integrasi salinan berbilang telah diperhatikan. This site needs JavaScript to work properly.

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Figure 2: 5 PCR analysis of transformed plants:…. Figure 3: 5 Southern blot analysis of transformed…. Figure 3: 13 Southern blot analysis of transformed plants: A Southern analysis for the ipt gene….

Southern blot analysis of transformed plants: A Southern analysis for the ipt gene in 10 plants randomly selected from different transformation events — lane 1, transgenic plant undigested; lane 2—10, transgenic plants digested with pst I; B Southern analysis for the hph gene in 10 plants randomly selected from different transformation events — P, plasmid pWRG; lane 1, transgenic plant undigested; lane 2—10, transgenic plants digested with kpn I; C Southern analysis for the uidA gene in 10 plants randomly selected from different transformation events — P, plasmid pWRG; lane 1, transgenic plant undigested; lane 2—10, transgenic plants digested with kpn I.

See this image and copyright information in PMC. Similar articles Regeneration of fertile transgenic indica group 1 rice plants following microprojectile transformation of embryogenic suspension culture cells. Zhang S, et al. Plant Cell Rep. PMID: Modification of senescence in ryegrass transformed with IPT under the control of a monocot senescence-enhanced promoter. Li Q, et al. Epub Feb Inheritance of gusA and neo genes in transgenic rice.

Peng J, et al. Plant Mol Biol. Chan MT, et al. Xu ZQ, et al. PMID: Chinese. Show more similar articles See all similar articles. Full-text links [x] Free PMC article. Copy Download.

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