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Little is known about interactions between seeds within the inflorescence of perennial ryegrass ( Lolium perenne L.) and their effect on final seed weight. These relations were investigated in two glasshouse experiments using two genotypes, by reducing the number of seeds in an inflorescence at...
The passing of Jack Heslop-Harrison marks the end of an outstanding international scientific career and represents the loss of a distinguished contemporary British botanist. British by birth and by acclaim in that he held Fellowships of the Royal Society and the Royal Society of Edinburgh,...
For many plant species, growth is limited in acid soils, which are characterized by high levels of potentially-toxic elements and low nutrient availability. Although plant-soil interactions are traditionally studied during the growing season, the highest concentrations of toxic elements in the...
Vegetative growth of grasses was analysed by dry mass increase of growing leaves. Holcus lanatus was grown in a controlled environment and leaf extension rates of leaf numbers 5–10 of the main tiller were monitored daily. Leaf appearance and leaf extension rates (LER) of leaves 5–7 enabled...
The purpose of this study was to determine how a plant's response to colonization by mycorrhizal fungi relates to its ability to acquire and utilize phosphorus for growth and reproduction. Two tomato genotypes previously found to be either responsive (‘LA1709’) or unresponsive (‘large...
Genetic diversity in 36 populations of wild taxa of the Brassica oleracea L. group (2 n =18) and two cultivated forms was studied using isozyme variation at 11 loci for five enzyme systems (IDH, 6-PGD, PGM, PGI, MDH). Mean values for the percentage of polymorphic loci and expected heterozygosity...
Observations were made on Dendrocalamus giganteus clumps in six locations in the Kandy district of Sri Lanka when 23 out of 111 clumps flowered from 1990 to 1996. Examination of fresh florets confirmed their description by Munro in 1868 (Clayton et al ., 1994. In: Dassanayake MD, Fosberg FR,...
A newly discovered Glomalean fungus, Scutellospora spinosissima, collected from acidic tropical soils with very low nutrient status and, in places, predominantly cyperaceous vegetation, is described and illustrated. Copyright 1998 Annals of Botany Company.
The last century has seen enormous gains in plant productivity and in resistance to a variety of pests and diseases through much innovative plant breeding and more recently molecular engineering to prevent plant damage by insects. In contrast, improvements to salt and drought tolerance in crop...
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