Abstract Detail

Systematics Section/ASPT

Abdul, Suleiman D [1], Zhigila, Andrawus Daniel [2], Fatima Binta J, Sawa [1], Danailu, Gayaunan [1].

Leaf epidermal micromorphology as diagnostic features in accessions of sesamum indicum L.

Fresh leaves of twelve accessions of S. indicum were studied to examine their stomatal features, trichomes, epidermal cell shapes and anticlinal cell-wall patterns which may be used for the delimitation of the accessions.  The twelve accessions of S. indicum studied have amphistomatic leaves, i.e. having stomata on both surfaces. Four types of stomatal complex types were observed namely, diacytic, anisocytic, tetracytic and anomocytic. Anisocytic type was the most common occurring on both surfaces of all the accessions and occurred 100% in accessionslale-duk, ex-sudan and ex-gombe 6. Duncan Multiple Range Test (DMRT) – one-way ANOVA revealed that there was no significant difference between the stomatal densities of accessions ex-gombe 6, ex-sudan, adawa-wula, adawa-ting, ex-gombe 4 and ex-gombe 2. Accession adawa-ting (improved) has the smallest stomatal size (26.39µm) with highest stomatal density (79.08mm²) while accession adawa-wula possessed the largest stomatal size (74.31µm) with lowest stomatal density (29.60mm²), the exception was found in accessionadawa-ting whose stomatal size is larger (64.03µm) but with higher stomatal density (71.54mm²). Wavy, curve or undulate anticlinal wall patterns with irregular and or isodiametric epidermal cell shapes were observed.  These accessions were found to exhibit high degree of heterogeneity in their trichome features. Ten types of trichomes were observed: unicellular, glandular peltate, capitate glandular, long unbranched uniseriate, short unbranched uniseriate, scale, multicellular, multiseriate capitate glandular, branched uniseriate and stallate trichomes. The most frequent trichome type is short-unbranched uniseriate, followed by long-unbranched uniseriate (72.73% and 72.5%) respectively. The least frequent was multiseriate capitate glandular (11.5%). The high variation in trichome types and density coupled with the stomatal complex types suggest that these accessionsprobably have the capacity to conserve water. Furthermore, the leaf micromorphological features varied from accession to accession hence, are found to be good diagnostic and additional tool in identification as well as nomenclature of the accessions of S. indicum.

1 - Abubakar Tafawa Balewa University, Biological Sciences, Yelwa Campus, Bauchi, Bauchi, 74005, Nigeria
2 - Gombe State University, Biological Sciences, Gombe, Gombe, Nigeria
3 - Abubakar Tafawa Balewa University, Biological Sciences, Yelwa Campus, Bauchi, Bauchi, 74005, Nigeria

Keywords:
indicum L
stomata
trichome
Sesamum
epidermal
cells
taxonomy.

Presentation Type: Oral Paper:Papers for Sections
Session: 33
Location: River Fork/Grove
Date: Wednesday, July 30th, 2014
Time: 11:00 AM
Number: 33011
Abstract ID:89
Candidate for Awards:None