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Details van artikel 35 van 82 gevonden artikelen
| Titel: |
Foliar Epidermal Studies, Organographic Distribution and Taxonomic Importance of Trichomes in the Family Solanaceae |
| Auteur: |
O. Adedeji O.Y. Ajuwon O.O. Babawale |
| Verschenen in: |
International journal of botany |
| Paginering: | Jaargang 3 (2007) nr. 3 pagina's 276-282 |
| Jaar: |
2007 |
| Inhoud: |
The leaf epidermal and organographic distribution of trichomes studies were carried out on nine species in four genera in the family Solanaceae. Distinctive anatomical characters which indicate close inter-relationship amongst the genera and species include presence of trichomes on leaf epidermal surfaces, petiole, stem, pedicel, sepal and petal surfaces, amphistomatic leaf surfaces, anisocytic to anomocytic stomatal types, polygonal, occasionally irregular epidermal cell shape on the adaxial epidermal surfaces and generally lower number of stomata on the adaxial surface. Some characters can be used to separate the genera within the family and also the species within each genus. These include anticlinal walls on the adaxial and abaxial epidermal surfaces, stomatal types in addition to the basic anisocytic to anomocytic stomatal complex types. <I>S. nigrum </I>in the genus <I>Solanum</I> has the highest number of stomatal types. Noteworthy is the presence of protrusions on the stomata of the species in the genus <I>Lycopersicon</I> which is absent in the species of the other genera. The different trichome types have differing organographic distributions within the same species and within the same genus in the family. This can be useful in the identification of the species and even their corresponding organs such as leaf, stem, petiole, etc. which would be of interest to pharmacognosists, archaeobotanists, palaeobotanists and agronomists. <I>Capsicum annuum </I>can be separated from <I>C. frutescens </I>and <I>C. chinense</I> on the basis of the organographic distribution of the trichomes. <I>Solanum torvum</I> is the only species in the genus <I>Solanum </I>and in the species of the family Solanaceae studied with stellate non-glandular trichomes on the adaxial and abaxial epidermal surfaces. The spine-like non-glandular trichome type observed in <I>Lycopersicon pimpinellifolium </I>was completely absent in all the plant parts of <I>Lycopersicon lycopersicum </I>cv Roma VF. This can be used to delimit the two species in the genus. The unique bicellular to multicellular stalk glandular trichomes of <I>Nicotiana tabacum</I>, a mono-species genus in Nigeria are reported. They are believed to be responsible for the unique smell that emanates from <I>N. tabacum</I>. The genus <I>Nicotiana</I> is the only genus in the family with multicellular stalk glandular trichomes. |
| Uitgever: |
Asian Network for Scientific Information (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 35 van 82 gevonden artikelen
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