Soil microbial communities and their carbon assimilation are affected by soil properties and season but not by plants differing in their photosynthetic pathways (C3 vs. C4)

C3 and C4 pathways of photosynthetic carbon assimilation in marine diatoms are under genetic, not environmental, control.

Marine diatoms are responsible for up to 20% of global CO(2) fixation. Their photosynthetic efficiency is enhanced by concentrating CO(2) around Rubisco, diminishing photorespiration, but the mechanism is yet to be resolved. Diatoms have been regarded as C(3) photosynthesizers, but recent metabolic labeling and genome sequencing data suggest that they perform C(4) photosynthesis. We studied the...

Distribution of C3 and C4 Photosynthetic Pathways in Plants

Tea yield and soil properties as affected by slope position and aspect in Lahijan area, Iran

Soil genesis, physico-chemical properties and tea yield were investigated along different hillslope positions in the major tea cultivation area of Iran, i.e. Lahijan, Gilan Province. Land suitability was also determined for the tea production in this hilly region. Four different slope positions i.e., summit, shoulder, backslope and toeslope were sampled on three slope aspects following the prof...

Plant and soil fungal but not soil bacterial communities are linked in long-term fertilized grassland.

Inorganic fertilization and mowing alter soil factors with subsequent effects-direct and indirect - on above- and below-ground communities. We explored direct and indirect effects of long-term fertilization (N, P, NPK, Liming) and twice yearly mowing on the plant, bacterial and fungal communities and soil factors. We analyzed co-variation using 16S and 18S rRNA genes surveys, and plant frequenc...

Soil organic carbon dynamics jointly controlled by climate, carbon inputs, soil properties and soil carbon fractions.

Soil organic carbon (SOC) dynamics are regulated by the complex interplay of climatic, edaphic and biotic conditions. However, the interrelation of SOC and these drivers and their potential connection networks are rarely assessed quantitatively. Using observations of SOC dynamics with detailed soil properties from 90 field trials at 28 sites under different agroecosystems across the Australian ...