نتایج جستجو برای: c3 and c4 species
تعداد نتایج: 16905084 فیلتر نتایج به سال:
An ultimate goal of evolutionary biology is the prediction and experimental verification of adaptive trajectories on macroevolutionary timescales. This aim has rarely been achieved for complex biological systems, as models usually lack clear correlates of organismal fitness. Here, we simulate the fitness landscape connecting two carbon fixation systems: C3 photosynthesis, used by most plant spe...
Plants using the C3 and C4 photosynthetic pathways differ in carbon-isotope composition, and this difference offers a means to estimate the relative abundance of these two functional groups in the palaeorecord. We report here results of a study aiming to evaluate pollen dC (dCp) of Poaceae (the grass family) as a proxy indicator for palaeoecological studies. On average dCp differs by /13 betwee...
The photosynthetic efficiency of C3 grasses declines with increasing temperature and C4 grasses are predicted to be advantaged at temperatures above 15 °C. We demonstrated an above-ground productivity difference in a commongarden experiment with Alloteropsis semialata and show that it is related more to differences in life-history than to photosynthesis. Frost caused leaf mortality in the C4 bu...
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