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California Polytechnic State University, San Luis Obispo

Series

Photosynthesis

2003

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Full-Text Articles in Life Sciences

Small Heat Shock Protein Responses Of A Closely Related Pair Of Desert And Coastal Encelia, Charles A. Knight, David D. Ackerly Jan 2003

Small Heat Shock Protein Responses Of A Closely Related Pair Of Desert And Coastal Encelia, Charles A. Knight, David D. Ackerly

Biological Sciences

Evolutionary variation for accumulation of small heat shock protein (sHsp) may contribute to thermal niche differentiation between species. Here we examine temperature and time-course-dependent variation for sHsp accumulation in a recently diverged pair of Encelia raised in a common environment: Encelia farinosa, common in the Mojave desert, and Encelia californica, which is found along the cool coastal bluffs of southern North America. Both species exhibit peak sHsp accumulation at 42oC. Encelia californica accumulated greater levels of sHsp at temperatures below 42oC, while E. farinosa had greater levels above 42oC. Encelia farinosa accumulates sHsp at ...