Chilling-Induced Alterations in the Photosynthetic Capacity of Chilling-Tolerant and Chilling-Sensitive Cultivars of Zea Mays
An inhibition of photosynthetic capacity is commonly observed when plants of tropical and subtropical origin are subjected to temperatures between 0°C and 15°C. Chilling-induced alterations in photosynthetic processes are one of the first manifestations of chilling stress and have often been characterized by declines in the rate of CO2 uptake over time (1–3). This inhibition of photosynthetic capacity appears to be the result of many different interacting factors and the contribution of these factors varies among plant species and with the light intensity, relative humidity, and oxygen partial pressure during chilling. Our primary objective was to examine the effects of short-term chilling stress (5°C, 48 h) on photosynthesis in chilling-sensitive (CS) and chilling-tolerant (CT) cultivars of Zea mays using leaf gas exchange and chlorophyll fluorescence measurements. In addition, recovery from chilling stress was examined.
KeywordsPhotosynthetic Capacity Chilling Stress Unit Leaf Area Chlorophyll Fluorescence Measurement PSII Antenna
Unable to display preview. Download preview PDF.
- 8).Schreiber, U., W. Bilger (1985) NATO Advanced Research Workshop, PortugalGoogle Scholar