Stomatal Characteristics of Different Ploidy Levels in Some <I> Dendrobium </I> Hybrids
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Abstract
Four Dendrobium hybrids at different ploidy levels were studied. It was found that there was no significantly different in terms of stem diameter. There was no relation between flower size and ploidy level whereas leaf area and leaf width varied according to ploidy level. However, number of stomatal cells and epidermal cells per area were less whereas the sizes of those were bigger when plant ploidy level increased. There was a positive correlation between number of stomatal cells and stomatal index, r = 0.85 whereas a negative correlation between number of stomatal cells, number of epidermal cells per area and stomatal cell length, r = -0.88 and -0.94, respectively. Accuracy of using stomatal cell length to predict number of stomatal cells and epidermal cells was 77 and 88 %, respectively.
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