Transcriptional activation by heat and cold of a thiol protease gene in tomato. [Lycopersicon esculentum]
- Univ. of California, Berkeley (USA)
We previously determined that low temperature induces the accumulation in tomato (Lycopersicon esculentum) fruit of a cloned mRNA, designated C14, encoding a polypeptide related to thiol proteases. We now demonstrate that C14 mRNA accumulation is a response common to both high (40{degree}C) and low (4{degree}C) temperature stresses. Exposure of tomato fruit to 40{degree}C results in the accumulation of C14 mRNA, by 8 hours. This response is more rapid than that to 4{degree}C, but slower than the induction of many heat shock messages by 40{degree}C, and therefore unique. We have also studied the mechanism by which heat and cold exposure activate C14 gene expression. Both high and low temperature regulate protease gene expression through transcriptional induction of a single C14 gene. A hypothesis for the function of C14 thiol protease gene expression in response to heat and cold is discussed.
- OSTI ID:
- 5957841
- Journal Information:
- Plant Physiology; (USA), Vol. 93:4; ISSN 0032-0889
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SH-PROTEINASES
GENES
TOMATOES
TEMPERATURE EFFECTS
BIOLOGICAL STRESS
HYPERTHERMIA
HYPOTHERMIA
MESSENGER-RNA
THIOLS
TOLERANCE
TRANSCRIPTION
BODY TEMPERATURE
ENZYMES
FOOD
FRUITS
HYDROLASES
NUCLEIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PEPTIDE HYDROLASES
RNA
551000* - Physiological Systems