Abstract:
:Net photosynthetic rates of Spirodela polyrrhiza turions, at low O(2) levels, were 6.2 and 38.8 micromoles O(2) per gram fresh weight per hour at 1 millimolar HCO(3) (-) and CO(2) saturation, respectively, and much lower in a regular low-pH growth solution. Air equilibration O(2) concentrations decreased rates considerably, except at CO(2) saturation. The surfacing rate of turions in various inorganic carbon surroundings correlated positively with their photosynthetic rates, but were the same at high and low O(2) levels. The relevance of these findings in relation to environmental conditions conductive to germination of autotrophically growing turions is discussed.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Beer Sdoi
10.1104/pp.79.1.199subject
Has Abstractpub_date
1985-09-01 00:00:00pages
199-201issue
1eissn
0032-0889issn
1532-2548journal_volume
79pub_type
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