Cannabis sativa L. - Botany and Biotechnology

leaves of tetraploid plants showed a two-fold increase. The protein content of roots
did not show any significant change between different ploidy levels (Fig.17.10).
These results obviously showed that the protein content depended on DNA content
and polyploidy level, but interesting result related to mixoploid plants with the most
protein content. Probably presence of diploid and polyploid cells beside each other
caused higher expression of proteins in mixoploid tissues.

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2x 2x+4x 4x

Protein (mg g

-1FW)

Ploidy level

leaf

root

Fig. 17.10Effect of ploidy levels on protein content in the leaf and root of Cannabis

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0

5

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15

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25

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2x 2x+4x 4x

Soluble sugar (mg g

-1

FW)

Ploidy level

leaf

root

Fig. 17.11Effect of ploidy levels on soluble sugar content in the leaf and root of Cannabis

380 H. Mansouri and M. Bagheri