THE CLOVER-ROOT MEALY BUG.: Dactylopius trifolii, Forbes
نویسندگان
چکیده
منابع مشابه
Harmful supernumerary chromosomes in a mealy bug population.
HE supernumeraries, or B chromosomes, of the mealy bug, Pseudococcus obscurus, have been shown to undergo preferential segregation both in oogenesis and in spermatogenesis (NUR 1962a). In a female with two supernumeraries, they do not pair during the first meiotic division but usually pair and segregate regularly in the second division. However, when one or an odd number is present the unpaired...
متن کاملModulation of rosR Expression and Exopolysaccharide Production in Rhizobium leguminosarum bv. trifolii by Phosphate and Clover Root Exudates
The acidic exopolysaccharide (EPS) secreted in large amounts by the symbiotic nitrogen-fixing bacterium Rhizobium leguminosarum bv. trifolii is required for the establishment of an effective symbiosis with the host plant Trifolium spp. EPS biosynthesis in rhizobia is a very complex process regulated at both transcriptional and post-transcriptional levels and influenced by various nutritional an...
متن کاملGenome sequence of the clover symbiont Rhizobium leguminosarum bv. trifolii strain CC275e
Rhizobium leguminosarum bv. trifolii strain CC275e is a highly effective, N2-fixing microsymbiont of white clover (Trifolium repens L.). The bacterium has been widely used in both Australia and New Zealand as a clover seed inoculant and, as such, has delivered the equivalent of millions of dollars of nitrogen into these pastoral systems. R. leguminosarum strain CC275e is a rod-shaped, motile, G...
متن کاملReversal of heterochromatization and the activity of the paternal chromosome set in the male mealy bug.
N male mealy bugs with the lecanoid chromosome system, one haploid set of I chromosomes becomes heterochromatic early in embryogeny, whereas both haploid sets of female nuclei remain euchromatic. The heterochromatic set was first described by SCHRADER (1921 ) . Later, HUGHES-SCHRADER (1935) showed that this set was not transmitted by the male to its offspring. SCHRADER and HUGHES-SCHRADER (1 93...
متن کاملGenome sequence of the clover-nodulating Rhizobium leguminosarum bv. trifolii strain SRDI943.
Rhizobium leguminosarum bv. trifolii SRDI943 (strain syn. V2-2) is an aerobic, motile, Gram-negative, non-spore-forming rod that was isolated from a root nodule of Trifolium michelianum Savi cv. Paradana that had been grown in soil collected from a mixed pasture in Victoria, Australia. This isolate was found to have a broad clover host range but was sub-optimal for nitrogen fixation with T. sub...
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ژورنال
عنوان ژورنال: The Canadian Entomologist
سال: 1899
ISSN: 0008-347X,1918-3240
DOI: 10.4039/ent31279-10