Journal Name:
- The International Journal of Pharmaceutical Research and Bio-Science
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Abstract (2. Language):
The family Asteraceae (Compositae) is a very large cosmopolitan family. It is represented by about 24,000 species, which are distributed throughout the world except Antarctica. (Funk et.al. 2009). In West Bengal the family is represented by about 83 genera 205 species (Ghosh and Mitra, 1982). Trichomes or hairs furnish rich field for morphogenetic investigation and are among the most useful of all anatomical features for systematic comparison of angiosperms. The available information in regards to hairs of common plants of West Bengal in Asteraceae is very scanty. Present study deals with 10 common taxa of the family Asteraceae. The present study is therefore, aimed for identification of some plants along with other characters in the family Asteraceae in some parts of Bengal. Hairs of the studied taxa are basically non-glandular sometimes glandular type. Non-glandular hairs are variable from unicellular to multicellular, but glandular hairs are always multicellular. Some of the studied genera can be distinguish from the other genera by some species type of hairs. For example the Vernonia cinerea L. can be separated from other genera by the presence of T-shaped hairs. The basic structures of hairs are more or less constant in Eclipta alba (L.) Hassk, Helianthus annuus L. and Synedrella nodiflora (L.) Gaertn. In other taxa forms of hairs are greatly variable i.e. different parts of plant possess different morpho-types of hairs. The Ageratum houstonianum Mill. Have maximum types of hairs, i.e. ten types. The second highest number of hairs has been reported in Parthenium hysterophorus L. containing nine types of hairs. In Blumea lacera L., eight types of hairs have been reported. Glandular hairs of variable size and shaped have been noticed in Blumea lacera L., Parthenium hysterophorus L. and Synedrella nodiflora (L.). 5-celled, shriveled, swollen terminal celled hairs have been observed only in leaves of Ageratum houstonianum Mill. Similarly many celled triseriate, conical based with truncate apex hairs are found only in stems and petioles in Parthenium hysterophorus L. Petiolar part of Synedrella nodiflora (L.) Gaertn. has unique type of hairs, usually uncommon in other studied taxa. In Tridax procumbens L., peduncle has unique type of hairs. Flagellate type of hairs can be broadly divided into two categories on the basis of morphological character of apical cell.
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FULL TEXT (PDF):
- 6
408-425