Photosynthetic Adjustment to Temperature

摘要: The description of a general mechanism for photosynthetic adjustment to temperature that encompasses all autotrophic species is not possible three principal reasons: (i) inherent genetic diversity, (ii) differential strategies in growth and development, (iii) organisms respond changes rather than absolute temperature. Thus, ‘high’ ‘low’ are relative terms will differ pyschrophilic, mesophilic thermophilic organisms. However, given this complexity, some consensus regarding emerging. At low (0–10 °C), photosynthesis constrained thermodynamically. This may be manifested by chloroplast phosphate limitation due reduced rates sucrose synthesis and/or source-sink limitations. In case, CO2 uptake O2 evolution regulated directly through metabolite accumulation (feedback inhibition) control. Alternatively, feedback inhibition indirectly catabolite repression genes. Although light exacerbate susceptibility photoinhibition at many species, cold grown, chilling-tolerant plants exhibit increased capacity carbohydrate which alleviates limitation, supplies cryoprotectant results higher warm-grown plants. cold-grown algae does reflect per se, but rather, excitation pressure on PS II. contrast, chilling-sensitive only thermodynamically also severely inhibited developmentally.