Table 4.
Photosynthetic parameters of some Hymenophyllaceae from chlorophyll fluorescence measurements
| Species, and dark-adapted Fv/Fm | Locality | PPFD95 % (μmol m−2 s−1) | (1 – qP)max | PPFD (1 – qP)50 (μmol m−2 s−1) | NPQmax | PPFD NPQ50 (μmol m−2 s−1) |
|---|---|---|---|---|---|---|
| Hymenophyllum fucoides Fv/Fm= 0·829 ± 0·007 | San Eusebio forest. Mérida, Venezuela | 212 ± 42 | 0·86 ± 0·03 | 138 ± 9 | 2·23 ± 0·20 | 207 ± 21 |
| Hymenophyllum hirsutum Fv/Fm= 0·833 ± 0·032 | Northern Range, Trinidad | 51 ± 9 | 0·98 ± 0·01 | 42 ± 1 | 1·11 ± 0·03 | 36 ± 2 |
| Hymenophyllum polyanthos Fv/Fm= 0·843 ± 0·014 | Northern Range, Trinidad | 112 ± 24 | 0·95 ± 0·02 | 85 ± 4 | 1·85 ± 0·07 | 83 ± 5 |
| H. sanguinolentum Fv/Fm= 0·824 ± 0·028 | Maruia Springs, New Zealand | 567 ± 60 | 0·96 ± 0·05 | 455 ± 61 | 4·95 ± 0·19 | 483 ± 37 |
| Trichomanes sp. Fv/Fm= 0·810 ± 0·010 | Est. Barinas, Venezuela | 111 ± 30 | 0·97 ± 0·01 | 78 ± 2 | 1·03 ± 0·08 | 97 ± 10 |
| Trichomanes diaphanum Fv/Fm= 0·787 ± 0·019 | Northern Range, Trinidad | 49 ± 6 | 1·00 ± 0·01 | 43 ± 1 | 1·27 ± 0·03 | 25 ± 2 |
| Trichomanes capillaceum Fv/Fm= 0·833 ± 0·013 | Monte Zerpa forest. Mérida, Venezuela | 47 ± 3 | 1·03 ± 0·02 | 32 ± 2 | 1·31 ± 0·02 | 28 ± 1 |
| Trichomanes polypodioides Fv/Fm= 0·813 ± 0·013 | Northern Range, Trinidad | 37 ± 2 | 0·97 ± 0·01 | 33 ± 1 | 1·68 ± 0·03 | 15 ± 1 |
The PPFD95 % figures are the mean ± s.d. of estimates calculated from three independent replicate curves. The last four columns are means ± s.e. parameters of logistic curves fitted to the whole data. See text for further explanation.