Abstract
In present study, anatomical and palynological characters of Rumex species in NE Iran were examined. For anatomical study, manual cross sections of fresh and dried stems and leaves were prepared and stained by differential staining. In palynological study, the pollen were extracted from anther, acetolysed and observed by SEM. The results of anatomical research showed, annular collenchymous tissue below the epidermis layer, different shape of vascular bundle, sclerenchymous strands around the vascular bundles in stem, dorsi-ventral mesophyll and continuous and discontinuous vascular bundles in leaves. The palynological findings indicated, panporate, tricolporate, tetracolporate, granulate, microechinate and punctate pollen in studied species.
Highlights
The genus Rumex L. belongs to the family Polygonaceae and the order Caryophyllales which has about 200 species distributed in temperate regions, European countries, America, Asia and Australia continents (Heywood, 1978; Qaiser, 2001; Sanchez and Kron, 2008; Chase and Reveal, 2009)
Sahney and Vibhasa (2012) in anatomical studies on Rumex hastatus, mentioned “Rumex hastatus is similar to R. dentatus but differs from it due to presence of chlorenchyma below the furrows, tannin filled cells below the chlorenchyma and large druses in particular position in the cortex and absence of hollow pith
They explained “comparative anatomy study of leaves might provide some helps to the study of phylogeny and classification of Rumex L.”The palynological results of present research, showed tricolporate, tetracolporate, panporate type while the shape of pollen in polar view was the same in three species i.e. spherical- triangular
Summary
The genus Rumex L. belongs to the family Polygonaceae and the order Caryophyllales which has about 200 species distributed in temperate regions, European countries, America, Asia and Australia continents (Heywood, 1978; Qaiser, 2001; Sanchez and Kron, 2008; Chase and Reveal, 2009). This genus comprises around 28 and 8 species in Iran and Khorassan Razavi Province (NE Iran) respectively (Rechinger, 1968). Comparative anatomical and palynological studies have not been done on Iranian Rumex species, this report focused on the above research to recognize variation in internal structure and pollen micromorphological features among the five Rumex species in NE Iran
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