Developmental differences in the location of polyphenols and condensed tannins in leaves and stems of sericea lespedeza, Lespedeza cuneata
1990
Mosjidis, C.O. | Peterson, C.M. | Mosjidis, J.A.
This histologkal study was performed to determine whether differences in location and concentration of polyphenols and condensed tannins could be observed in leaves and stems of sericea lespedeza genotypes of high (HP) or low (LP) phenolic content. Polyphenols and condensed tannins were especially evident in the vacuoles of paraveinal mesophyll cells from leaves of both genotypes. However, higher levels of these substances were observed in paraveinal cells of HP leaves. Cross-sections through young stem internodes revealed many perivascular and vascular parenchyma cells staining prominently for polyphenols in both genotypes. Their location in vacuoles of paraveinal mesophyll cells that function in photosynthate transport within the leaf suggests that these substances play an active role in physiological processes of sericea lespedeza plants. Alternatively, they could represent a form in which these plants store excess photosynthates.
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