Welcome to Gaia! :: View User's Journal | Gaia Journals


View User's Journal

Prey item Before heavy logging
Photosynthetic affinity for DIC or CO2 was depressed in the HC cells, as reflected in the relationship of either photosynthesis or rETR (using PAM fluorometer) v DIC curves ( Fig. 1). The half-saturation concentration (K1/2) for both DIC and CO2 increased significantly (p Verteporfin ( Fig. 1C), reflecting a down-regulation of CCM under the ocean acidification condition. The efficiency of Ci acquisition, the ratio of Vmax to K1/2 for both DIC and CO2, decreased significantly (p = 0.03) in the HC cells, by about 39% and 29% for photosynthetic rates and rETR, respectively. Independent of the different growth CO2 levels, the maximum rates of photosynthesis and electron transport were unaffected (p = 0.62). The Vmax of photosynthetic carbon fixation and rETR in the HC cells were 82.47 ± 6.32 fmol cell−1 h−1 and 95.25 ± 4.18 (a.u.), compared to 94.15 ± 14.69 fmol cell−1 h−1 and 96.54 ± 2.40 (a.u.) in the LC cells. However, both the photosynthetic rates and rETR at limiting DIC levels were significantly lower (p = 0.03) in the HC than in the LC cells, by up to 57% and 15% (inset in Fig. 1), respectively, reflecting a higher extent of the rate-limitation by less CO2 availability under DIC limiting levels in the HC grown cells.

Manage Your Items
Other Stuff
Get GCash
Get Items
More Items
Where Everyone Hangs Out
Other Community Areas
Virtual Spaces
Fun Stuff
Gaia's Games

Customize your own avatar now!

Join Now

Have an account? Login Now!