title: Isolation and expression analysis of salt stress-associated ESTs from contrasting rice cultivars using a PCR-based subtraction method.
abstract: Salt stress adversely affects the growth of rice plants. To understand the molecular basis of salt-stress response, four subtracted cDNA libraries were constructed employing specific NaCl-stressed tissues from salt-tolerant (CSR 27 and Pokkali) and salt-sensitive (Pusa basmati 1) rice cultivars. An efficient PCR-based cDNA subtraction method was employed for the isolation of the salt-stress responsive cDNA clones. In all, 1,266 cDNA clones were isolated in the course of this study, out of which 85 clones were end-sequenced. Database search of the sequenced clones showed that 22 clones were homologous to genes that have earlier been implicated in stress response, 34 clones were novel with respect to their function and six clones showed no homology to sequences in any of the public database. Northern analysis showed that the transcript expression pattern of selected clones was variable amongst the cultivars tested with respect to stress-regulation.
authors.affiliation: Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi - 110021, India.
authors.forename: C
authors.initials: C
authors.lastname: Sahi
authors.forename: M
authors.initials: M
authors.lastname: Agarwal
authors.forename: M K
authors.initials: MK
authors.lastname: Reddy
authors.forename: S K
authors.initials: SK
authors.lastname: Sopory
authors.forename: A
authors.initials: A
authors.lastname: Grover
mesh_terms: D015152:Blotting, Northern; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000378:metabolism; D019992:Databases as Topic; D004926:Escherichia coli / Q000378:metabolism; D020224:Expressed Sequence Tags; D005821:Genetic Techniques; D008957:Models, Genetic; D012275:Oryza / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011130:RNA Ligase (ATP) / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D012492:Salts / Q000494:pharmacology; D013997:Time Factors
chemical_list: D018076:DNA, Complementary; D012333:RNA, Messenger; D012492:Salts; D011130:RNA Ligase (ATP)