| The potential capacity of plant roots to absorb water and nutrients generally declines in osmotic-stressed plants, presumably because of a reduction in the nutrient element demand, and such decrease varies among plant genotypes. In order to investigate the effect of the osmotic stress caused by polyethylene-glycol 6000 (PEG) on the macronutrient concentration in sugarcane (Saccharum spp.) in vitro, we established a factorial experiment with a completely randomized distribution. Study factors were variety (Mex 69-290 and CP 72-2086) and PEG in the nutrient medium (0, 3, 6 and 9 %, to generate osmotic potential corresponding to -0.18, -0.45, -0.65 and -0.80 MPa, respectively), which resulted in eight treatments, with five replicates each. The experimental... |
