Sains Malaysiana 38(6)(2009): 921–928
Pengaktifan Gen Pelapor di dalam Tumbuhan Transgenik Tomato Melalui Kaedah Agro-Infiltrasi Vektor Penandaan Tanpa Promoter
(Activation
of Reporter Gene in Transgenic Tomato by Agro-Infiltration of the Promorterless Tagging Vector)
Safarina Ahmad
Fakulti Sains Sumber dan Teknologi, Universiti Malaysia Sarawak
Kota Samarahan 93400, Kuching, Sarawak, Malaysia
Ismanizan Ismail* & Zamri Zainal
Pusat Pengajian Biosains dan Bioteknologi, Fakulti Sains dan Teknologi
Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor D.E., Malaysia
NurulFarhana Zakaria
Makmal Genetik, Institut Penyelidikan Perhutanan Malaysia
52109 Kepong, Kuala Lumpur, Malaysia
Diserahkan: 19 Januari 2009 / Diterima: 24 April 2009
ABSTRAK
Kajian ke atas kaedah inokulasi eksplan menggunakan vektor penandaan tanpa promoter, pCAMDIN ke atas tomato varieti tempatan MT1, bagi tujuan mutagenesis penyelitan T-DNA menggunakan kaedah infiltrasi agro telah dijalankan. Bahagian daun muda disuntik dengan larutan yang mengandungiAgrobacterium tumefaciens, 100 mg/l Str, 50 mg/l Kan, 10mM MES dan 100 μM Acetosyringone. Infiltrasi dilakukan ke atas sampel daun dengan menggunakan medium LB, bahagian permukaan daun dilukakan dan infiltrasi agro dilakukan ke atas sampel daun pokok tomato yang berada di dalam rumah kaca. Tisu yang diinfiltrasi tidak mengalami kecederaan dan kekal hijau selepas 5 hari. Infiltrasi yang mudah dilakukan dan pengekspresan transien GUS yang dapat dicerap berlaku pada sampel yang dianalisa adalah antara kebaikan kaedah ini. Seterusnya, fragmen gen gus telah berjaya diamplifikasi. Kejayaan integrasi gen gus ke dalam tomato juga dapat dilihat melalui penghibridan Southern. Berdasarkan keputusan ini, dapat dicadangkan bahawa penyelitan transgen daripada vektor rekombinan pCAMDIN telah berlaku dalam genom tomato.
Kata kunci: A. tumefaciens; agro-infiltrasi; tomato transgenik; transformasi
ABSTRACT
A study on explant inoculation method using promoterless tagging vector, pCAMDIN, on local tomato (MT1
variety) for the purpose of T-DNA insertional mutagenesis by agroinfiltration have been carried
out. The injection of young leaves with a solution containing Agrobacterium tumefaciens, 100 mg/l Str, 50 mg/l Kan, 10mM MES and 100μM Acetosyringone. The
infiltration was carried out with the use of LB medium by gently wounding the surface of the leaves and every procedures were carried out in the glass house. Infiltrated
tissues were not damaged and remained green even after 5 days. Advantages of the
technique included ease of infiltration and the observed transient expression
on the sample. gus gene
fragments were successfully amplified. Successful integration of gus gene into the tomato can also
be observed in the results of Southern hybridization. Thus, it can be suggested
that transgene insertion from recombinant vector pCAMDIN has occurred in tomato genome.
Keywords: A. tumefaciens; agro-infiltration;
transformation; transgenic tomato
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*Pengarang untuk surat-menyurat, email: maniz@ukm.my
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