[...]... effective in controlling damping-off diseases of pea and cucumber (Hadar et al., 1983) In vitro studies showed that the sugar composition of the growth medium determined the inhibitory effect of E cloacae on Pythium ultimum and that growth inhibition was linked to binding of the bacteria to the hyphae, thus indicating that a lectin-type interaction is probably involved (Nelson et al., 1986) This interaction... variety hialinovka was that following bacterization with all strains the content of chlorophyll 5 and protein in green mass increased rather than leaf surface and yield On variety Tson bacterization produced an increase in yield and protein content without noticeable changes in photoassimilating properties The majority of strains showed high effectivity on at least four varieties Two strains (11 and 34)... surface coincided with the increase of chlorophyll 5 content The coincidence of such indices increases with crop capacity enlargement in the most sensitive varieties (Belosnezka and Teresinskaya-24) Strains 69 and 1 facilitating effective symbiosis with most of the examined varieties, were the best ones Similar results were obtained in analogous tests with soya varieties Kievskaya, Teresinskaya-24 and Peremoga... hope that the book will provide interesting readinq and valuable information not only for rhizosphere microbiologists, but also €or plant physiologists and pathologists, soil scientists, microbiologists, agronomists and scientists interested in environmental protection V VanEura F Kunc -2- INTRODUCTORY LECTURE This Page Intentionally Left Blank DEVELOPMENT AND INTERACTION BETWEEN MICROBIAL COMMUNITIES... lupins was performed on plants of two varieties: white (Stuart, Olezka, Soyus, Solnechniy) and yellow (Kopilovsky, Martin-2) It was established that varieties of white lupin were more sensitive to inoculation Yellow lupin differed by exhibiting a lower crop capacity and a more prolonged vegetation period In plants of this -2 5- The influence of bacterization on photoassimilating characteristics and. .. host-plant were used: the size of assimilating surface and chlorophyll 2 content in leaves of one level without visible signs of deformation or damage were taken for analysis Chlorophyll 5 content was determined in alcohol extracts from homogenized leaves with a spectroscopis method at E644 and E663 Plants were taken in the phase of budding and the beginning of flowering The work was conducted over 5 years... Effectivity of rhizobial strains was estimated in vegetation tests RESULTS AND DISCUSSION Studying the effects of bacterization on the activity of processes connected with soya plant photosynthesis it was established that in 15 variants it lead to an increase (more than 5%) increase of assimilating surface and in 20 variants to the increase of chlorophyll g content in leaves (Table 1) .In most cases the enlargement... growth in the rhizosphere The trace amounts of carbon for this growth could be introduced from forced aeration of roots in experimental systems The results also indicate the difficulty in analysing soil population biology generally even though not all bacteria may vary in cell size to the extent of E cloacae It is increasingly common to use antibiotic marking to trace the fate of soil organisms and it... Institute of Horticultural Research, Littlehampton, West Sussex, BN17 6LP, UK -ABSTRACT Microbial biomass formation on root surfaces can be measured in plants growing in solution with or without an inert solid support Carbon flow to the biomass can be measured by growing plants in solution or soil on a continuous source of 14C02 and the expected biomass formation predicted The lack of correlation between. .. tradictional indices (number and mass of nodules, nodule acetylene-reductase activity, yield and protein content in it) it was proposed to take into account the photoassimilatory properties of host plants as an additional criterion for symbiotic effectivity It permits the clarification of specific aspects of grain plant response to inoculation INTRODUCTION Obtaining strains capable of forming an effective symbiosis . INTERRELATIONSHIPS BETWEEN MICROORGANISMS AND PLANTS IN SOIL Developments in Soil Science 18 Interrelationships between Microorganisms and Plants in Soil Proceedings of an International. Nethdands Library of Congress Cataloging -in- Publication Data Interrelationships between microorganisms and plants in soil. (Developments in soil science ; 18) Bibliography: p. Includes. in Soil Science 18 INTERRELATIONSHIPS BETWEEN MICROORGANISMS AND PLANTS IN SOIL Further Titles in this Series 1. 1. VALETON BAUXITES 2. IAHR FUNDAMENTALS OF TRANSPORT PHENOMENA IN