Rust haustoria: nutrient uptake and beyond
نویسندگان
چکیده
منابع مشابه
Rust haustoria: nutrient uptake and beyond
Haustoria are morphological features of an extremely successful class of plant parasites, the obligate biotrophs. The broad phylogenetic spectrum of organisms producing haustoria suggests that these structures have arisen many times in the course of evolution and represent specific adaptations of these organisms to the close interaction with their respective host plants. This close interaction ...
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Haustoria produced by biotrophic fungi and Oomycetes are extensions into living host cells. However, they are not truly intracellular. They breach the cell wall only and a newly formed host plasma membrane (the extrahaustorial membrane) surrounds them, resulting in a close association of fungal and plant membranes only separated by a thin fungal wall and an extrahaustorial matrix. The extrahaus...
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Nutrient uptake in obligate parasitism was recently reviewed by Bushnell and Gay (5) for the powdery mildews. In the rust fungi, the experimental approach to solving this question is quite different, because the fungus mycelium grows only in restricted areas within the leaf. The rust pustules act as foci for the accumulation of many metabolites. The fungus derives nutrients by alteration of the...
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Rust diseases caused by fungi of the order Pucciniales afflict a wide range of plants, including cereals, legumes, ornamentals, and fruit trees, and pose a serious threat to cropping systems and global food security. The obligate parasitic lifestyle of these fungi and their complex life cycles, often involving alternate hosts for the sexual and asexual stages, also make this group of pathogens ...
متن کاملHigh level activation of vitamin B1 biosynthesis genes in haustoria of the rust fungus Uromyces fabae.
In the rust fungus Uromyces fabae, the transition from the early stages of host plant invasion toward parasitic growth is accompanied by the activation of many genes (PIGs = in planta induced genes). Two of them, PIG1 (= THI1) and PIG4 (= THI2), were found to be highly transcribed in haustoria, and are homologous to genes involved in thiamine (vitamin B1) biosynthesis in yeast. Their functional...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 2003
ISSN: 0028-646X,1469-8137
DOI: 10.1046/j.1469-8137.2003.00761.x