Cycloheximide-mediated superinduction of genes involves both native and foreign transcripts in rice (Oryza sativa L.)
✍ Scribed by Manu Agarwal; Amanjot Singh; Dheeraj Mittal; Chandan Sahi; Anil Grover
- Book ID
- 104087310
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 364 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0981-9428
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✦ Synopsis
Rice seedlings subjected to heat shock show rapid and transient induction of Oshsp17.4-CI, Oshsp17.9A-CI and OsClpB-cyt/hsp100 transcripts. When the seedlings were pre-treated with protein synthesis inhibitor cycloheximide, levels of the above transcripts during heat shock were more elevated than those seen with heat shock alone. Heat stress and cycloheximide co-treatment resulted in higher transcript accumulation in comparison to cycloheximide pre-treatment followed by heat stress. In transgenic plants raised with OsClpB-cyt/hsp100 promoter driving expression of the reporter gus gene, expression of the gus transcript was subjected to similar superinduction event as was seen with native OsClpB-cyt/hsp100 transcripts in untransformed plants. Yeast cells transformed with variably-sized rice ClpB-cyt/hsp100 promoter driving expression of the lacZ reporter transcript showed that specific sequences of the promoter region may be implicated in superinduction.