Tempranillo with temperatures dropping by as much as 16 °C (30 °F) from the daytime high. The Tempranillo grape is one of the few grapes that can adapt and thrive in continental Mediterranean climates like this. Pests and diseases are a serious problem for this grape variety, since it has little resistance to either. The grape forms compact, cylindrical bunches of spherical, deep blue-black fruit with a colourless pulp. The leaves are large with five overlapping lobes. The Tempranillo root absorbs potassium easily, which facilitates pH levels of 3.6 in the pulp and 4.3 in the skin when it reaches maturity.
Petite mutation petite negative mutants. Potentially, these yeasts have a different inheritance system in place for their mitchondrial genome than "S. cerevisiae" does. The frequency at which "S. castellii" spontaneously produces petites is similar to that of "S. cerevisiae", with the mitochondrial DNA of those petites being highly altered via deletion and rearrangement. Suppressive petites of "S. cerevisiae" are the most commonly observed spontaneously created mutants, whereas in "S. castellii," the most commonly observed spontaneous mutant is the neutral petite, further leading to speculation that the transference of this mutation differs between species. Petite mutation petite (ρ–) is a mutant first discovered