dc.contributor.author | Munyua, J. K. | |
dc.contributor.author | Ateka, E. M. | |
dc.contributor.author | Njoroge, Kiarie | |
dc.contributor.author | Njeru, R. W. | |
dc.contributor.author | Muturi, P. W. | |
dc.contributor.author | Mburu, M. W. K | |
dc.contributor.author | Mwololo, J. K. | |
dc.date.accessioned | 2014-07-17T07:31:51Z | |
dc.date.available | 2014-07-17T07:31:51Z | |
dc.date.issued | 2011-12 | |
dc.identifier.citation | Optimimization of Agricultural Value Chains for sustainable Development | en_US |
dc.identifier.uri | http://hdl.handle.net/11295/73147 | |
dc.description | Oral presentation at aGRO 2011 Biennial Conference | en_US |
dc.description.abstract | Abstract (C2064)
Physical, chemical and physiological properties of the plant leaves and stems
play an important protective role against pathogens. Morphological,
anatomical and serological studies were conducted on sweet potato varieties to
determine the role of the traits in relation to sweet potato response to viral
diseases incidence described, especially the sweet potato virus disease
(SPVD). The morphological characteristics included petiole and internode
length and pubescence. Anatomical attributes of nine sweet potato varieties
were studied using light microscopy. Serological tests were conducted on
sweet potato leaves with nitrocellulose membranes enzyme-linked
immunosorbent assays (NCM-ELISA) to test for presence of viruses that
commonly infect sweet potato in Kenya. There were significant differences (P
<0.05) among the sweetpotato varieties for the triats measured. The sweet
potato varieties which were tolerant SPVD had longer internodes and petioles,
thicker leaf and stem cuticles and low hair density on leaves and stems
compared to the susceptible varieties. The sweetpotato virus titres were high in
the most susceptible varieties (Jewel, Mugande) compared to the resistant
(Jonathan, Zapallo) out of the samples tested. The sweetpotato mild mottle
virus (SPMMV), sweetpotato chlorotic stunt virus (SPCSV), sweetpotato
feathery mottle virus (SPFMV) and the sweetpotato chlorotic stunt virus
(SPCFV) were on average 22%, 36%, 32% and 11%, respectively among the
20 varieties. Sweet potato morphology can form a basis for rapid assessment of
SPVD tolerance among varieties. The multiple infections involved SPCSV
and this was common in most of the diseased plants hence the importance of
targeting resistance to SPCSV through crop improvement programs. | en_US |
dc.description.sponsorship | National Council of Science and Technology, The Kenya Seed Company | en_US |
dc.language.iso | en | en_US |
dc.publisher | Faculty of Agriculture, University of Nairobi | en_US |
dc.subject | Cuticle | en_US |
dc.subject | hairiness | en_US |
dc.subject | Host plant resistance | en_US |
dc.subject | sweetpotato virus disease | en_US |
dc.title | Morphological differences among susceptible and resistant sweetpotato varieties | en_US |
dc.type | Presentation | en_US |
dc.type.material | en | en_US |