Перегляд вихідного коду сторінки A Few Forecasts On The Future Of the Pexidartinib

For instance, total wet time was 8�C26% longer for the foliose, water-preserving species L. amplissima, compared to P. glauca, while [http://www.selleckchem.com/products/pexidartinib-plx3397.html Pexidartinib order] it was 3�C13% shorter for the three thin-lobed, fruticose or foliose species B. bicolor, U. longissima and P. norvegica (which have fast rehydration and desiccation rates; Table?1). These differences are consistent with results of previous studies in which different ��functional morphotypes�� (Larson & Kershaw 1976; Larson 1981) have been grouped with respect to their water uptake and loss characteristics. However, it should be noted that although hydration is mainly affected by morphology and water availability, it can also be potentially affected by thallus pigmentation (Kershaw 1975), and/or the osmotic potential of the thallus (Beckett 1995; Hajek, Bart��k & Dubov�� 2006). The model developed here also discriminated between potential activity, assuming instant activation upon hydration of the lichen thalli, and their realized activity, when photosynthetic (PSII) activation kinetics were incorporated (Eqn?5) (Table?1). The assumption of instantaneous activation worked very well for P. glauca and L. amplissima, because these species had fast activation kinetics, and their realized activity was very close to their potential photosynthetic activity ([http://www.selleckchem.com/products/SRT1720.html selleck chemicals] activities significantly for P. norvegica, and even more dramatically for B. bicolor and U. longissima (Table?3). These findings clearly show that the ��growing season�� of lichens cannot solely be based [http://en.wikipedia.org/wiki/FKBP FKBP] on their summarized wet period. In addition, the frequency and length of hydration events also affect the lichen's performance in a habitat. If total wet time is split into many brief, intermittent periods, realized activity will be even more hampered for species with slow photosynthetic activation rates. Hence, also for this reason total wet time has clear drawbacks as an indicator of potential growth for lichens with slow activation, because the chances for positive net production will decrease if hydration is broken into many short events. Although morphological features may either further reduce the lichens' active periods or theoretically compensate for slow activation, that was not shown in the present study. In conclusion, slow activation may be an important factor that explains the confinement of hydrophilic species to habitats that provide sufficiently long hydration periods. Green algal lichens can be hydrated within minutes by liquid water (Lange et?al. 1986), but may require hours to rehydrate in humid air, which moreover seldom results in as high water contents as hydration by rain (Smith 1962; Rundel 1988; Lange, Green & Heber 2001; Jonsson et?al. 2008).