A Study in Cereal Rusts; Physiological Races: A Thesis Submitted to the Faculty of the Graduate School of the University of Minnesota (Classic Reprint) - Tapa blanda
Sinopsis
Excerpt from A Study in Cereal Rusts; Physiological Races: A Thesis Submitted to the Faculty of the Graduate School of the University of Minnesota
Wheat and barley are not included since in nearly every case 100 per cent of infection results. The denominator in each case represents the total number of leaves inoculated, and the numerator, the number of leaves which developed pustules.
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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Reseña del editor
Excerpt from A Study in Cereal Rusts; Physiological Races: A Thesis Submitted to the Faculty of the Graduate School of the University of Minnesota
Wheat and barley are not included since in nearly every case 100 per cent of infection results. The denominator in each case represents the total number of leaves inoculated, and the numerator, the number of leaves which developed pustules.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Reseña del editor
Excerpt from A Study in Cereal Rusts; Physiological Races: A Thesis Submitted to the Faculty of the Graduate School of the University of Minnesota
Cereal rusts were known as destructive plant pests by the ancients. Observations were made on the effect of weather and location on their prevalence. The comparative susceptibility of the various cereals received some attention. Theophrastus speaks of the varying susceptibility of different cereals, as does Pliny, who says that barley is less likely to rust than are other grains. In modern times many observations have been made, but many of these were only incidental.
Dietel (1887) calls attention to a certain amount of morphological and physiological variation in rust fungi, but does not definitely establish the fact that there are distinct biologic forms. Previous to his time Puccinia graminis Pers. was considered a single species found on cereals and various grasses. However, in 1894 Eriksson (1894-1) showed that, although the morphology of the fungus on the different cereal hosts varied but slightly, there was a distinct specialization in parasitism. He therefore divided the different species of rusts into subdivisions which he termed "formae speciales." Puccinia graminis, the only species extensively used in the present investigation, he divided into five formae speciales, two of which he mentioned as being sharply demarcated and the remainder as being probably also distinct.
All of these forms of Puccinia graminis were capable of producing aecidia on various species of Berberis. It therefore occurred to Eriksson that perhaps his formæ speciales would be equalized when grown upon the alternate host. This, however, he found not to be the case. He concluded that the forms were physiologically distinct even when grown upon Berberis. In fact he was led to believe that they became more firmly fixed after a period on the barberry.
This discovery stimulated much research concerning the physiological relationships of the Uredineae.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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A Study in Cereal Rusts; Physiological Races (Classic Reprint)
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Paperback. Condición: New. Print on Demand. This book explores the field of cereal rust, a parasitic fungus that can cause devastating crop losses. Throughout history, this disease has plagued farmers, leading to food shortages and economic crises. The author delves into the complex relationship between cereal rust and its host plants, examining both biological and environmental factors that influence the severity of infection. Through meticulous experiments and observations, the author sheds light on the nature of resistance in certain wheat varieties, paving the way for the development of more resilient crops. This book not only provides a comprehensive understanding of cereal rust but also unveils the intricate mechanisms that govern plant-pathogen interactions, offering valuable insights for agricultural scientists and plant breeders alike. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Nº de ref. del artículo: 9781332201396_0
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A Study in Cereal Rusts Physiological Races A Thesis Submitted to the Faculty of the Graduate School of the University of Minnesota Classic Reprint
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A Study in Cereal Rusts Physiological Races A Thesis Submitted to the Faculty of the Graduate School of the University of Minnesota Classic Reprint
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