See more from this Session: General Crop Physiology & Metabolism: I
Tuesday, November 2, 2010
Long Beach Convention Center, Exhibit Hall BC, Lower Level
Two sorghum lines TX7078 and Liang Tang Ai were planted into insulated soil bins in a minilysimeter system and allowed to develop to boot stage. At boot, the soil bins were placed onto analog scales to measure whole plant transpiration. Diurnal leaf level gas exchange was measured with a portable photosynthesis system. Though Liang Tang Ai had higher leaf areas, whole plant transpiration efficiency increased. ACi, leaf level light curves, and maximal quantum use efficiency as Fv/Fm revealed only slight overall differences between cultivars. Results suggest that either stomatal resistance or decreased leaf internal CO2 concentration may be responsible for increased transpiration use efficiencies in Liang Tang Ai.