نتایج جستجو برای: ulmi
تعداد نتایج: 251 فیلتر نتایج به سال:
Wheat leaf rust, caused by the basidiomycete Puccinia triticina, can cause yield losses of up to 20% in wheat producing regions. During infection, the fungus forms haustoria that secrete proteins into the plant cell and effect changes in plant transcription, metabolism, and defense. It is hypothesized that new races emerge as a result of overcoming plant resistance via changes in the secreted e...
Ceratocystis platani is the causal agent of canker stain of plane trees, a lethal disease able to kill mature trees in one or two successive growing seasons. The pathogen is a quarantine organism and has a negative impact on anthropogenic and natural populations of plane trees. Contaminated sawdust produced during pruning and sanitation fellings can contribute to disease spread. The goal of thi...
Los viñedos están en valles andinos entre 2400 y 3200 msnm con variedades introducidas por los españoles como Misionera Moscatel de Alejandría, que dieron lugar a Imporeña Vicchoqueña, identificadas mediante marcadores moleculares. Estos coloniales interandinos, son tutorados soportes un metro, permitiendo brazos pámpanos puedan apoyarse crecer forma “arbolitos” bifurcaciones 70 centímetros del...
Water-soluble glycopeptides isolated from cultures of Ceratocystis ulmi have been reported to be toxins involved in Dutch elm disease. The influence of the glycopeptides on the water relations of Ulmus americana seedlings was tested by placing cut stems in glycopeptide preparations. After 4 hours in 200 micrograms per milliliter toxin the stem conductance of the seedlings was reduced by 79% and...
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