Titlebook: Root Demographics and Their Efficiencies in Sustainable Agriculture, Grasslands and Forest Ecosystem; Proceedings of the 5 James E. Box Con

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Seasonal development of loblolly pine lateral roots in response to stand density and fertilisatione year regardless of season. Stand density did not affect lateral root morphological development. However, fertilisation stimulated the initiation of branched lateral roots that were greater than 1 mm in diameter.

PHAG

Inhibition of fungal colonization on the rhizoplane of the CS,-producing plant, , L.of tomato after 7 days. In contrast, roots of . showed many or abundant hyphae of . and . but no or few hyphae of the remaining species. These observations were confirmed by ergosterol analysis. Plant-generated CS. may account for this decreased fungal colonisation, although other compounds may also

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Production of carbon disulfide (CS,) from L-djenkolic acid in the roots of , L.steine lyase activity was confirmed in . when PbS formed on injured roots treated with L-cysteine and lead acetate. When injured roots were wetted, CS. production increased significantly compared to non-wetted roots. When L-djenkolic was applied to injured roots, CS. production increased significant

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Eastern gamagrass (,) root penetration into and chemical properties of claypan soilse to 180 cm depth, and decreased from the surface with soil depth. Roots of eastern gamagrass were aerenchymous (having cellular compartments which allow air movement) at all depths, were mycorrhizal to at least 150 cm depth, and had relatively high tolerance to acidic Al toxic Tatum subsoil (Typic

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purpose were limited. Therefore, in compiling these proceedings, a number of papers from scientists from the former Soviet Union and former Warsaw Pack countries have been included even though the scientists were not actually present for the SymPOSIum.978-94-010-6218-3978-94-011-5270-9

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