The physiology of host-parasite relations

Antagonistic Relations of Microörganisms 1

“…Within recent years, there have appeared a number of reviews dealing with the antagonistic interrelations among various microorganisms; some of these have dealt with certain specific groups, and others with a great variety of organisms. It is sufficient to mention Holman (155), Buchanan and Fulmer (41), and Nakhimovskaia (231) on bacterial associations, Seitz (303) on mixed infections, Brown (40), Novogrudsky (240), Weindling (355), Porter and Carter (261) and D'Aeth (64) on competition among fungi, Gaxrett (118) and Garrard and Lochhead (114) on the interrelations between soil-borne and disease-producing fungi, Nakhimovskaia (230) on antagonisms between actinomycetes and bacteria, and Waksman (345) on associations and antagonisms among micro6rganisms in different habitats. In this review, an attempt is made to present the broad antagonistic relations between micro'organisms living in association, either in simple mixed cultures or in complex natural populations; the significance of these associations in natural processes; their relation to disease production in man as well as in domesticated plants and animals; the chemical nature of the active substances produced; and finally, the nature of the antagonistic action.…”

Ecological Life History Outlines for Fungi

“…Control of fungi which cause disease (Roberts, 1936, Heald 1943 . Conditions of host tissues at time of infection (Brown 1936) : first alternate host: age of infected tissue, general health . of tissue, general health of host organ and plant; second alternate host : age of tissues when infected, general health of host tissue, general health of host plant; both hosts: general environmental conditions: humidity, moisture, temperature, light conditions, conditions of soil relations, conditions of contaminating gasses in atmosphere.…”

Soluble sugar concentrations in needles and bark of western white pine in response to season and blister rust /

“…Pathogens influence the metaboHsm of their host's tissues. This phenomenon has been studied extensively in many annual plant-obligate pathogen interactions and is known to include changes in respiration rates, photosynthesis rates, and qualitative and quantitative changes in metabolite pools (Brown 1936;Durbin 1967; Goodman and others 1967;Martin 1972;Schoeneweiss 1975;Siddiqui and Manners 1971; Welch and Martin 1975). Conversely, the metabolic or nutritional status of the host is known to influence the performance of some of its pathogens (Grainger 1956; Huber and Watson 1974;Schoeneweiss 1975).…”