Influence of Fertilizer Microdosing on Strigolactone Production and Striga hermonthica Parasitism in Pearl Millet

Jamil, M and Charnikhova, T and Jamil, T and Ali, Z and Mohamed, N E M A and Van Mourik, T and Bouwmeester, H J (2014) Influence of Fertilizer Microdosing on Strigolactone Production and Striga hermonthica Parasitism in Pearl Millet. International Journal of Agriculture and Biology, 16 (5). pp. 935-940. ISSN 1560–8530

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Abstract

Africa and nutrient deficiency aggravates this problem, often leading to complete failure of pearl millet crops. Like many other species, pearl millet secretes germination stimulants (strigolactones) into the soil in response to mineral nutrient deficiency, which triggers Striga seed germination resulting in infection. A greenhouse experiment was conducted to evaluate the influence of different doses of di-ammonium phosphate (DAP) fertilizer on strigolactone production and Striga infection in three different African pearl millet cultivars (KBH, Sadore Local and Striga resistance). All the pearl millet genotypes produced varying amounts of different strigolactones like orobanchol, epi-orobanchol, orobanchyl acetate and 5-deoxystrigol, the level of which decreases with increasing doses of DAP. The control treatment (no DAP) showed maximum Striga germination, emergence and dry biomass production in all cultivars of pearl millet. Supply of DAP fertilizer up to 4 g per hill suppressed Striga germination by 69, 64 and 59%; emergence by 87, 85 and 95% and dry biomass by 91, 98 and 83% in cvs KBH, Sadore Local and Striga Resistance, respectively. The present findings reveal that DAP fertilizer minimizes strigolactones production and, as a result, reduces Striga infection in pearl millet. Low doses of DAP fertilizer is a promising strategy to lower the destructive effect of Striga on pearl millet. The use of small doses of DAP fertilizer combined with resistant crop cultivars, intercropping with legumes and hand pulling of Striga at flowering in an integrated Striga control strategy should be developed to help African farmers control this noxious weed.

Item Type: Article
Divisions: Others
CRP: UNSPECIFIED
Uncontrolled Keywords: Pearl millet; Strigolactones; Striga hermonthica; Diammonium phosphate
Subjects: Mandate crops > Millets > Pearl Millet
Others > Fertilizers
Others > Plant Pathology
Others > Plant Disease
Depositing User: Mr Ramesh K
Date Deposited: 12 Apr 2018 09:55
Last Modified: 12 Apr 2018 09:56
URI: http://oar.icrisat.org/id/eprint/10558
Official URL: http://www.fspublishers.org/search_list2.php?title...
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: The financial support by the Higher Education Commission (HEC) Pakistan (to MJ) is acknowledged, as well as financial support by The Netherlands Organization for Scientific Research (NWO; VICI grant, 865.06.002 and Equipment grant, 834.08.001 to HJB). This project was cofinanced by the Centre for BioSystems Genomics (CBSG), a part of the Netherlands Genomics Initiative / Netherlands Organization for Scientific Research. For providing Striga seeds, we like to thank Cheickna Diarra (IER, Mali) and Abdel-Gabar Babiker (ARC, Sudan). Bettina Haussmann (former pearl millet breeder at ICRISAT) is acknowledged for providing seeds of pearl millet cultivars and entries.
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