Solute flows from Hordeum vulgare to the hemiparasite Rhinanthus minor and the influence of infection on host and parasite nutrient relations

Functional Plant Biology : FPB
Fan JiangWolfram Hartung

Abstract

Using the facultative root hemiparasite Rhinanthus minor and Hordeum vulgare L. as a host, the flows and partitioning of mineral nutrients within the host, the parasite and between host and parasite have been studied during the study period 41-54 d after planting, i.e approximately 30-43 d after successful attachment of the parasite to the host. In parasitising Rhinanthus shoot growth was 12-fold, but root growth only 2-fold increased compared to non-parasitising plants. Conversely, in the Hordeum host, shoot dry matter growth was clearly reduced, by 33% in leaf laminae and by 52% in leaf sheaths, whereas root growth was only slightly reduced as a consequence of parasitism. Growth-dependent increments of total nitrogen (N) and phosphorus (P) and of potassium (K), calcium (Ca) and magnesium (Mg) in parasitising Rhinanthus shoot were strongly increased, particularly increments of total N and P, which were 18 and 42 times, respectively, higher than in solitary Rhinanthus. However, increments of the above mineral nutrients in leaf sheaths of parasitised Hordeum vulgare were more strongly decreased than in leaf laminae in response to parasitic attack. Estimation of the flows of nutrients revealed that Rhinanthus withdrew from the ho...Continue Reading

Citations

Mar 1, 2008·Journal of Experimental Botany·Fan JiangDuncan D Cameron
Apr 1, 2007·Functional Plant Biology : FPB·Fan JiangWolfram Hartung
Jan 30, 2013·The New Phytologist·James P FisherDuncan D Cameron

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