Detrimental and Protective Effects of Rust in Flax Plants of Varying Age

Publisher Website
Google Scholar
Abstract
Flax (L. usitatissimum) plants in growth chambers showed differential effects on disease development, agronomic characteristics and quality of the seed following inoculation 1-3 times, at different stages of development, with the virulent rust fungus, Melampsora lini race 371. Vulnerability increased with age of the plant and reached a maximum at the prebloom stage. Light to moderate infections reduced yield 34-55% and severe infections reduced it 64-79%. Oil and protein contents were reduced when plants were inoculated at prebloom and again at the flowering stage. I number was not affected. Flax inoculated 35-48 days after planting during the vegetative stage, and re-inoculated 11-30 days later at the prebloom stage, showed an induced resistance to rust. Pre-inoculated plants were less severely rusted, and produced more seed capsules and seeds than those inoculated only that the prebloom stage. The induced resistance apparently was systemic; the effect was apparent in foliage that developed after pre-inoculation. The protective effect lasted at least 30 days in the cultivar Redwood 65. The significance of the protection phenomenon is discussed.

This publication has 1 reference indexed in Scilit: