Gently rinsed roots

Gently rinsed roots. For another set of 12 root samples, following incubation at field moist conditions, the roots were kept in the incubation jars and the gas was displaced by 3 changes of water in immediate succession. This was done to determine if wetting alone or both wetting and squeezing were required to stimulate sulfur gas emissions. 

Gently Rinsed Roots. The field moist incubations showed rapid CS2 accumulation followed by declining concentration. CS2 production was not continuous. The initial slopes for the CS2 time courses were greater for the field moist incubations (Figure 3a) than for post-rinse incubations (Figure 3b). CS2 was detectable in 7 of me field moist incubations but continued in only 5 of them following rinsing. 

Figure 3. Time course of CS2-S pas concentrations incubations of S. excelsum roots. A) time courses for individual incubations starting as field moist roots then pases displaced by 3 gentle rinsings with water (W). B) time courses after washing re-drawn with starting times synchronized.

---