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dc.contributor.authorDayou, Olivier
dc.contributor.authorKibet, Willy
dc.contributor.authorOjola, Patroba
dc.contributor.authorGangashetty, Prakash Irappa
dc.contributor.authorWicke, Susann
dc.contributor.authorRuno, Steven
dc.date.accessioned2021-02-22T07:52:07Z
dc.date.available2021-02-22T07:52:07Z
dc.date.issued2021
dc.identifier.citationDayou, O., Kibet, W., Ojola, P., Gangashetty, P. I., Wicke, S., & Runo, S. Two-tier Witchweed (Striga hermonthica) Resistance in Wild Pearl Millet (Pennisetum glaucum) 29Aw. Weed Science, 1-19.en_US
dc.identifier.issn0043-1745 (Print), 1550-2759 (Online)
dc.identifier.urihttps://doi.org/10.1017/wsc.2021.12
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/21567
dc.descriptionThis is a “preproof” accepted article for Weed Science. This version may be subject to change in the production process, and does not include access to supplementary materialen_US
dc.description.abstractThe parasitic plant purple witchweed [Striga hermonthica (Del.) Benth.] poses a serious threat to cereal production in sub-Saharan Africa. Under natural infestation, the wild pearl millet [Pennisetum glaucum (L.) R. Br.] line 29Aw demonstrates resistance against the parasite, but the mechanism of its resistance is unknown. Striga resistance can be due to: (i) low induction of Striga germination (pre-attachment resistance) or (ii) inhibition of parasite attachment and development (post-attachment resistance). Germination bioassays and root chamber (rhizotron) resistance screening assays were used to determine the extent of pre- and post-attachment Striga resistance in 29Aw compared with the Striga-susceptible SOSAT-C88-P10 variety. Regarding pre-attachment resistance, 29Aw stimulated 10-fold less Striga seed germination at a maximum germination distance of 7.96 ± 2.75 mm from the host root compared with 35.94 ± 2.88 mm in SOSAT-C88-P10. Post-attachment resistance revealed 10 to 19-fold fewer, 2.5-fold shorter, and 28-fold less Striga seedling biomass growing on 29Aw compared to SOSAT-C88-P10. Microscopic analysis showed that Striga penetration in 29Aw was blocked at endodermis and cortex levels. Post-attachment resistance in 29Aw was further supported by fewer (22%) Striga-host vascular connections in 29Aw compared to 79% in SOSAT-C88-P10. Together, these findings demonstrate that 29Aw harbors both pre- and post-attachment resistance mechanisms against S. hermonthica.en_US
dc.language.isoenen_US
dc.publisherCambridgeen_US
dc.subjectPearl milleten_US
dc.subjectStriga pre-attachment resistanceen_US
dc.subjectStriga post-attachment resistanceen_US
dc.titleTwo-tier Witchweed (Striga hermonthica) Resistance in Wild Pearl Millet (Pennisetum glaucum) 29Awen_US
dc.typeArticleen_US


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