Document Type : Research Paper

Authors

• Bahareh Akbarnejad ¹
• Farrokh Ghahremaninejad ¹
• Mahmoud Bidarlord ²
• Ehsan Hoseini ²
• Mehrshid Riahi ³
• zohreh shirkhani ⁴

¹ department of plant sciences, faculty of biological sciences, Kharazmi University, Tehran, Iran, postal code: 15719-14911

² Department of Forests and Pastures and Watershed Management, Research and Education Center for Agriculture and Natural Resources of Gilan Province, Rasht, Iran, Postal Code: 41996-14445

³ Department of plant sciences, faculty of biological sciences, Kharazmi University, Tehran, Iran, postal code: 15719-14911

⁴ Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Postal code 15719-14911, Tehran, Iran

Abstract

The genus Myosotis L. is present in Iran with 18 herbaceous species, which mostly grow in temperate and humid regions. The present study was conducted for the first time to identify and describe the important anatomical features of the stem in this genus. Qualitative and quantitative characteristics of the stem of 14 species such as stem condition, stem diameter, xylem diameter, phloem diameter, collenchyma diameter, epidermis diameter, cortex diameter, trichome base diameter, and the number of rows of collenchyma cells were measured by ImageJ software. The phylogenetic tree was drawn with the help of Past 4.13v software and the species relationships of this genus were studied. To differentiate the species in this genus, the most valuable trait was cortex diameter and the least valuable trait was stem diameter. It was also found that due to the low level of changes (48 %), the stem traits did not show much diversity for the systematic study of this genus. Based on the tree derived from the anatomical features of the stem, "interspecies relations" are shown differently and it does not confirm the groupings at the level of subgenus and series obtained from previous studies.

Keywords

• forget-me-not
• anatomy
• stem
• taxonomy
• micromorphology

Main Subjects

• Developmental