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Titolo:
Correlated evolution of chloroplast heat shock protein expression in closely related plant species
Autore:
Knight, CA; Ackerly, DD;
Titolo Testata:
AMERICAN JOURNAL OF BOTANY
fascicolo: 3, volume: 88, anno: 2001,
pagine: 411 - 418
SICI:
0002-9122(200103)88:3<411:CEOCHS>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
GENUS CEANOTHUS RHAMNACEAE; NITROGEN AVAILABILITY; MOLECULAR CHAPERONES; NONTOLERANT VARIANTS; SOUTHERN CALIFORNIA; ELECTRON-TRANSPORT; PHOTOSYSTEM-II; LEAF-AREA; STRESS; THERMOTOLERANCE;
Keywords:
Ceanothus; chlorophyll fluorescence; chloroplast low molecular weight heat shock protein; Rhamnaceae; specific leaf area;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Knight, CA Stanford Univ, Dept Sci Biol, Stanford, CA 94305 USA Stanford Univ Stanford CA USA 94305 ol, Stanford, CA 94305 USA
Citazione:
C.A. Knight e D.D. Ackerly, "Correlated evolution of chloroplast heat shock protein expression in closely related plant species", AM J BOTANY, 88(3), 2001, pp. 411-418

Abstract

Interspecific variation in chloroplast low molecular weight (cLMW) HSP (heat shack 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 45 degreesC 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 degreesC heat treatment. In addition, chlorophyll fluorescence (F-v/F-m,) I h after the heat shocks was positively correlated with cLMW HSP expression. Contrary to our prediction, there was no correlation between July maximum temperature within species ranges and cLMW HSP expression. These results suggest that evolutionary differentiation in cLMV HSP expression is associated with leaf physiological parameters and related aspects of life history, yet associations between climatic conditions withinspecies ranges and cLMW HSP expression require further study.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/08/20 alle ore 08:57:52