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  • Title: [Construction and analysis of SSH library of Gossypium barbadense upon infection with Verticillium dahliae].
    Author: Zhu LF, Tu LL, Zhang XL, Nie YC, Guo XP, Xia QZ.
    Journal: Yi Chuan Xue Bao; 2005 May; 32(5):528-32. PubMed ID: 16018265.
    Abstract:
    Roots were collected from the seedlings inoculated with pathogen Verticillium dahliae after 2, 4, 8, 12, 24, 48, 72 and 96 hours for total RNA extraction. The cDNAs from the inoculated seedlings were used as the tester and those from the control seedlings as the driver. SSH method was employed to find the differently expressed cDNAs responding to the pathogen. T/A clone library was constructed containing 534 clones. The cDNA inserts were amplified from the bacterial clones directly with M13 primers by PCR. The size of the products ranged 0.2 - 1.2 kb with an average size of 0.5 kb. The SSH products were dotted on nylon filters, and the positive clones were screened by virtual Northern blotting with probes of the two kinds of initiative cDNAs. Totally 78 clones which were up-regulated and putatively involved in the defense response of G. barbadense were identified and sequenced. Sequence similarity searches were performed with the Blastn and Blastx. Most of them showed high or partial homology to genes or ESTs induced by different stresses in Arabidopsis thaliana and other species,such as the pathogenesis-related 10 family of G. hirsumtum and disease resistance-responsive family protein in Arabidopsis thaliana. The results would be helpful to understand the molecular mechanisms of disease response in cotton.
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