dc.contributor.author | Dayou, Olivier | |
dc.contributor.author | Kibet, Willy | |
dc.contributor.author | Ojola, Patroba | |
dc.contributor.author | Gangashetty, Prakash Irappa | |
dc.contributor.author | Wicke, Susann | |
dc.contributor.author | Runo, Steven | |
dc.date.accessioned | 2021-02-22T07:52:07Z | |
dc.date.available | 2021-02-22T07:52:07Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Dayou, 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.issn | 0043-1745 (Print), 1550-2759 (Online) | |
dc.identifier.uri | https://doi.org/10.1017/wsc.2021.12 | |
dc.identifier.uri | http://ir-library.ku.ac.ke/handle/123456789/21567 | |
dc.description | This 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 material | en_US |
dc.description.abstract | The 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.iso | en | en_US |
dc.publisher | Cambridge | en_US |
dc.subject | Pearl millet | en_US |
dc.subject | Striga pre-attachment resistance | en_US |
dc.subject | Striga post-attachment resistance | en_US |
dc.title | Two-tier Witchweed (Striga hermonthica) Resistance in Wild Pearl Millet (Pennisetum glaucum) 29Aw | en_US |
dc.type | Article | en_US |