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Santiago, E F; Larentis, T C; Barbosa, V M; Caires, ARL; Morais, G A; Suarez, Y R
Journal of fluorescence, 01/2015, Letnik: 25, Številka: 1Journal Article
The physiological behavior of PSII measured by chlorophyll a fluorescence explains stress responses; wonders if it can differentiate plants from different populations. For this purpose, acclimated young plants of two C. pachystachya populations were cultivated from seeds. Chlorophyll-a fluorescence was measured after fertilization and CO sub(2) sub(e). In the first 48 h after fertilization there was a reduction in the maximum quantum yield of PSII, while the means obtained under CO sub(2) sub(e) were significantly higher than in other treatments (0.8 and 0.81). The variable PI best expressed the different conditions tested. Compared to their respective controls, the reduction of DIo/CS was 35.89 % in population (P) and 41.89 % in population (I), while the polyphasic fluorescence kinetics differed between treatments, but not necessarily between populations, except for post-fertilization at I-P steps. The analysis of kinetics between Fo and Fj (Wt) showed no K band during the O-J phase. The interferences found in PSII reinforces the idea of reversible damage to PSII. This effect is directly related to the reduced electron transport rate and increased non-photochemical dissipation and may be similar to those observed under field conditions after planting; adjustment time depends, among other factors, on the genetic potential of the species.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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