Open AccessCorn Mitochondrial Protein Synthesis in Response to Heat Shock
Author(s) -
Christine M. Nebiolo,
Elizabeth M. White
Publication year - 1985
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.79.4.1129
Subject(s) - mitochondrion , heat shock protein , methionine , zea mays , cytoplasm , protein biosynthesis , biology , chloramphenicol , biochemistry , heat shock , shock (circulatory) , microbiology and biotechnology , biophysics , chemistry , amino acid , agronomy , medicine , gene , antibiotics
Corn (Zea mays L., W23(N), OH43(N), and reciprocal single cross hybrid) seedling mitochondria respond to a 10 degrees C temperature shift (27-37 degrees C) by incorporating a greater amount of [(35)S]methionine into acid-insoluble material than mitochondria incubated at the original growing temperature (27 degrees C). This increase is in part manifested in the enhanced synthesis of a 52 kilodaltons protein. At both temperatures mitochondria of two inbreds and their reciprocal hybrids synthesize normal (N) cytoplasm proteins sensitive to chloramphenicol and insensitive to cyclohexamide treatment. The 52 kilodaltons protein is found in the supernatants of pelleted (15,000g, 5 min) mitochondria after heat shock. The role of this protein in the heat shock response is discussed in light of the implication of mitochondria as the primary cellular target to temperature stress.