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首页> 外文期刊>Weed Research >Effect of diammonium phosphate application on strigolactone production and Striga hermonthica infection in three sorghum cultivars
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Effect of diammonium phosphate application on strigolactone production and Striga hermonthica infection in three sorghum cultivars

机译：施用磷酸氢二铵对三种高粱品种中内酯基内酯的产生和链霉菌感染的影响

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Jamil M, Van Mourik TA, Charnikhova T & Bouwmeester HJ (2012). Effect of diammonium phosphate application on strigolactone production and Striga hermonthica infection in three sorghum cultivars. Weed Research. Summary Striga hermonthica infection poses a major constraint to sorghum production in sub-Saharan Africa, and low soil fertility aggravates the S.hermonthica problem. Under mineral nutrient deficiency, the sorghum host secretes large quantities of strigolactones, signalling molecules, into the rhizosphere. These induce S.hermonthica seed germination and subsequent infection of the host roots. In a combination of field and glasshouse experiments, we analysed the effect of microdose applied diammonium hydrogen phosphate (DAP) fertiliser on production of strigolactones, S.hermonthica infection and yield of three different African sorghum genotypes (CGM-19/1-1, Lina-3, DouaG). The sorghum cultivars all produced the strigolactones sorgomol and 5-deoxystrigol, albeit in different quantity and ratio. Without fertiliser, high S.hermonthica infection and emergence occurred under both glasshouse and field conditions. DAP application reduced secretion of sorgomol and 5-deoxystrigol and reduced S.hermonthica germination (6670%), emergence (4973%) and dry biomass (9096%) under glasshouse conditions. Under field conditions, DAP microdosing reduced S.hermonthica emergence by 4084% and increased sorghum grain yield by 47142%. Thus DAP application reduced secretion of strigolactones into the rhizosphere and S.hermonthica parasitism both under controlled and field conditions. Microdosing of DAP may prove to be an efficient and cost effective option to reduce S.hermonthica damage in sorghum in sub-Saharan Africa, particularly in combination with other control options, such as intercropping, use of organic fertiliser and hand pulling of S.hermonthica at flowering to achieve integrated S.hermonthica management.
机译：Jamil M，Van Mourik TA，Charnikhova T和Bouwmeester HJ（2012）。施用磷酸氢二铵对三种高粱品种中内酯基内酯的产生和斯特里加（Striga hermonthica）感染的影响。杂草研究。总结撒哈拉链球菌感染是撒哈拉以南非洲高粱生产的主要限制因素，土壤肥力低下加剧了沙门氏菌问题。在缺乏矿质营养素的情况下，高粱宿主向根际分泌大量的内酯内酯，信号分子。这些会引起链球菌种子萌发并随后感染宿主根。在田间试验和温室试验的结合中，我们分析了微剂量施用磷酸氢二铵（DAP）肥料对生硬皮内酯产生，S.hermonthica感染和三种不同非洲高粱基因型（CGM-19 / 1-1，Lina）产量的影响。 -3，DouaG）。尽管数量和比例不同，但高粱品种都产生了甜菊内酯和5-脱氧雌三醇。没有肥料，在温室和田间条件下均会发生较高的沙门氏菌感染和出苗。在温室条件下，DAP的施用减少了甜菊醇和5-脱氧雌三酚的分泌，减少了月球链霉菌的发芽（6670％），出苗（4973％）和干燥生物量（9096％）。在田间条件下，微剂量DAP减少了S.hermonthica的出现，减少了4084％，并使高粱谷物的产量增加了47142％。因此，在控制和田间条件下，DAP的施用都减少了根皮内酯分泌到根际和S.hermonthica寄生虫中。在撒哈拉以南非洲，高剂量施用DAP可能是减少高粱中S.hermonthica损害的一种有效且具有成本效益的选择，特别是与其他控制方法结合使用，如间作，使用有机肥料和手拉S.hermonthica在开花时达到综合的S.hermonthica管理。

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