By James G. Horsfall (Eds.)
Read Online or Download Plant Disease: An Advanced Treatise. How Plants Defend Themselves PDF
Similar plants books
Seed development and germination
This article is meant for plant physiologists, molecular biologists, biochemists, biotechnologists, geneticists, horticulturalists, agromnomists and botanists, and upper-level undergraduate and graduate scholars in those disciplines. It integrates advances within the diversified and rapidly-expanding box of seed technology, from ecological and demographic facets of seed construction, dispersal and germination, to the molecular biology of seed improvement.
In 1958 E. BUNNING released a booklet within the former sequence "Proto plasmatologia" entitled "Polaritat und inaquale Teilung des pflanzlichen Protoplasten" (polarity and unequal department of the plant protoplast) within which for the 1st time result of experimental plant cytomorphogenesis have been re seen. This e-book was once dependent thoroughly on gentle microscopic observations and quite basic experimental options.
Cyclic Phenomena in Marine vegetation and Animals covers the complaints of the thirteenth eu Marine Biology Symposium. The identify offers papers that take on the cyclical organic strategies in inhabitants ecology, developmental biology, metabolism, and the habit of marine organisms. The textual content first covers subject matters in regards to the inhabitants cycles of natural world.
A country's imaginative and prescient for constructing renewable and sustainable power assets is usually propelled through 3 very important drivers – safety, rate, and environmental influence. The U. S. at the moment money owed for 1 / 4 of the world’s overall oil intake, with family calls for necessitating – at an ever becoming fee – a internet import of greater than 50% of the oil utilized in this kingdom.
- Natural Product Biosynthesis by Microorganisms and Plants, Part B
- Plant Physiological Ecology
- Sage: The Genus Salvia (Medicinal and Aromatic Plants - Industrial Profiles)
- Endemism in Vascular Plants
- Bacterial Growth and Division. Biochemistry and Regulation of Prokaryotic and Eukaryotic Division Cycles
Extra resources for Plant Disease: An Advanced Treatise. How Plants Defend Themselves
Sample text
2. T h e alternate host of the pathogen is absent, rare, or too far from the crop, so that little or no pathogen reaches the crop. 3. , is inactive at the time the particular plant stage is available for infection. 4. T h e pathogen is weakened and unable to grow, infect, or multiply rapidly because of unfavorable temperature, moisture, etc. 5. The pathogen may b e attacked by hyperparasites at the point of inoculum production or at the infection court and it may not b e able to induce disease (see Chapter 18, this v o l u m e ) .
Bateman's multiple component hypothesis ( s e e Chapter 3, Volume I I I ) provides an excellent conceptual framework for characterizing the various phenomena of tolerance. Using this hypothesis, we can divide disease into four types of interactions; those providing an environment that is ( 1 ) favorable to the pathogen, ( 2 ) unfavorable to the pathogen, ( 3 ) favorable to the host, and ( 4 ) unfavorable to the host. A. Determinants Affecting the Pathogen Environment Any event or interaction that contributes to the establishment of an environment favorable to the pathogen contributes to the susceptibility of the host.
Host preference by the vector is apparently responsible for less disease in some lettuce varieties to aster yellows (Yamaguchi and Welch, 1955) and in some tomato cultivars to curly top virus. On the other hand, some wheat lines escape infection by wheat streak mosaic virus because the plants are resistant to its mite vector Aceria tulipae. Similarly, some raspberry varieties escape infection by raspberry mosaic virus because 2. ESCAPE FROM DISEASE 27 they are resistant to the aphid vector. Furthermore, plants of some cultivars may escape disease because the vector acquires the virus from such plants with difficulty and therefore does not spread the virus within the field, or because the vector, although it acquires the virus, fails to transmit it to this cultivar in the field (Broadbent, 1969).