Changes in nitrogen content of epidermal and mesophyll cell tissues per petal from flower opening to senescence.

<p>Central bundles and the bottom part of each petal were excluded from samples. Means with different letters are significantly different in each tissue (Tukey test, <i>p</i> < 0.01). Each data point represents the mean ± S.E. (n = 3).</p><p>Changes in nitrogen content of epidermal and mesophyll cell tissues per petal from flower opening to senescence.