ISSN:
1573-9058
Keywords:
fluorescence quenching
;
photosystem 2
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Photosynthetic CO2 uptake and chlorophyll (Chl) a fluorescence of C4 perennial grasses, Miscanthus floridulus (Labill) Warb and M. transmorrisonensis Hayata, from altitudes in central Taiwan of 390 and 2700 m, respectively, were studied at 10 and 25 °C to find if the species differ in their photosynthetic responses to a low temperature, and whether their photosystems 2 become more susceptible to the photoinhibition at low temperatures. For both species, the maximum photosynthetic rate (Pmax) was reduced when the leaves were exposed to 10 °C. At irradiances higher than 400 µmol m-2 s-1, the values of Fv/Fm were reduced in both species at 10 °C but not at 25 °C, which indicated the photoinhibition at 10 °C. Reductions in Pmax and the values of Fv/Fm at 10 °C were lesser in M. transmorrisonensis than in M. floridulus.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1006888709593
