Abstract Detail



Anatomy and Morphology

Saheed, Sefiu Adekilekun [1], Ajao, Abdulwakeel [1], Jimoh, Mahboob A. [2], Faniyan, MM [3], Olatunde, DO [4], Ayeni, OB [3], Amusan, OC [3], Babs-Ogungbemi , AA [3], Aasa-Sadique, AD [3].

Critical Leaf Anatomical Characters Indicating C3 and C4 Photosynthetic Metabolism in Selected Dicotyledonous Genera in Nigeria.

Delimitation of plant species into different photosynthetic groups using leaf anatomical characters has been long established. However, most of these established characters are mostly documented for monocotyledons while that of dicotyledons especially from Africa flora is rare or scarce. This paper reports on critical leaf anatomical characters in three dicotyledonous plant genera known to exhibit C3 and C4 photosynthetic metabolism – Euphorbia L., Boerhavia L., and Cleome L. – this is in order to create a possible grouping of the species in these genera along their respective photosynthetic pathways, in addition to establishing characters which are peculiar to dicotyledons. Standard anatomical procedures were followed to investigate characters such as stomata index, stomata size, inter-stomatal distance, stomatal density, interveinal distance, intercellular air spaces, leaf thickness, mesophyll thickness, Kranz tissue, one cell distant count, maximum lateral cell count, vein density and vein distance. Our results revealed that interveinal distance that is less than 166μm indicate C4 dicotyledonous species while any higher values indicate C3 species. In addition, this study shows that the ‘maximum lateral cell count’ criterion of cells ranging from 2 to 6 indicates C4 dicotyledonous species while numbers higher than this indicate C3 species. The physiological implications of the identified characters are also discussed. This study is probably the first known to report on anatomical characters that are delimiting for dicotyledonous species.


1 - Obafemi Awolowo University, Ile-Ife, Nigeria, Department Of Botany, Department Of Botany, OAU, Ile-Ife, OS, 220005, Nigeria
2 - Osun State University, Plant Biology, Osogbo, Osun, 230212, Nigeria
3 - Obafemi Awolowo University, Botany, Ile-Ife, Osun, 220005, Nigeria
4 - Obafemi Awolowo University, Ile-Ife, Osun, 220005, Nigeria

Keywords:
C3
C4
photosynthesis
Leaf anatomy
Kranz tissue
dicotyledons
Euphorbia
Boerhavia
Cleome.

Presentation Type: Oral Paper
Number:
Abstract ID:307
Candidate for Awards:Katherine Esau Award,Maynard F. Moseley Award


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