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Correlated Evolution Of Chloroplast Heat Shock Protein Expression In Closely Related Plant Species, Charles A. Knight, David D. Ackerly
Correlated Evolution Of Chloroplast Heat Shock Protein Expression In Closely Related Plant Species, Charles A. Knight, David D. Ackerly
Biological Sciences
Interspecific variation in chloroplast low molecular weight (cLMW) HSP (heat shock protein) expression was examined with respect to phylogeny, species specific leaf area, chlorophyll fluorescence, and mean environmental conditions within species ranges. Eight species of Ceanothus (Rhamnaceae) were heat shocked for 4 h at several different temperatures. Leaf samples were collected immediately after the heat shock, and cLMW HSP expression was quantified using Western blots. At 450C species from the subgenus Cerastes had significantly greater cLMW HSP expression than species from the subgenus Ceanothus. Specific leaf area was negatively correlated with cLMW HSP expression after the 45 …