منابع مشابه
Gynodioecism in Cucumbers.
HE standard cultivars of cucumbers, Cucumis sativus L., are monoecious. These monoecious plants are male early in development and female later. The standard races exhibit marked differences in the expression of monoecism, ranging from weak to strong male tendency. Available information suggests that these racial differences reflect genetic variations governing rate of sex conversion during plan...
متن کاملTasmanian Sea ~ Cucumbers ( Holothuroidea )
Over five hundred and forty of seacucumbers eollected on the southern coasts of Tasmania have in the course of the present study. Seven families, 12 and 14 species are represented in the One is regarded are as new, adhaerens, TaVUtll. and Paraca.udina. Three other species have not been recorded previously from Tasmania but are known from the coast of Victoria. They are Cllcurnella Jnutans incon...
متن کاملLight Suppresses Sporulation and Epidemics of Peronospora belbahrii
Peronospora belbahrii is a biotrophic oomycete attacking sweet basil. It propagates asexually by producing spores on dichotomously branched sporophores emerging from leaf stomata. Sporulation occurs when infected plants are incubated for at least 7.5h in the dark in moisture-saturated atmosphere at 10-27°C. Exposure to light suppresses spore formation but allows sporophores to emerge from stoma...
متن کاملPopulation Structure of Peronospora effusa in the Southwestern United States
Peronospora effusa is an obligate pathogen that causes downy mildew on spinach and is considered the most economically important disease of spinach. The objective of the current research was to assess genetic diversity of known historical races and isolates collected in 2014 from production fields in Yuma, Arizona and Salinas Valley, California. Candidate neutral single nucleotide polymorphisms...
متن کاملMolecular Taxonomy of Phytopathogenic Fungi: A Case Study in Peronospora
BACKGROUND Inappropriate taxon definitions may have severe consequences in many areas. For instance, biologically sensible species delimitation of plant pathogens is crucial for measures such as plant protection or biological control and for comparative studies involving model organisms. However, delimiting species is challenging in the case of organisms for which often only molecular data are ...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1889
ISSN: 0006-8071
DOI: 10.1086/326419