About Phoma Liliana chandra & tandon II

Additional data are given on the occurrence and synonymy of this thermophilic soil-borne organism. It is proposed to indicate the species henceforth asPhoma multirostrata (Mathur.et al.) comb. nov.     

Phomenolactone,an antifungal substance from phoma lingam

The structure of phomenolactone, an antifungal substance isolated from the fungus Phoma lingam was established by reaction of phomenoic acid with dipyrridyl 2,2′-isulphide in the presence of triphenylphosphine (yield 90%). Anhydrophomenolactone is obtained as a secondary product during this synthesis in a yield of 10%.     

Foliar fertilizers for the management of phoma leaf spot on coffee seedlings

The growing demand for alternative strategies for plant disease management has sought a reduction in the use of fungicides via the employment of resistance inducers and foliar fertilizers, among others. Therefore, this study aimed at evaluating the following foliar fertilizers for the management of phoma leaf spot: a foliar fertilizer based on macro‐ and micronutrients (Fmm: 10% N, 4% S, B, 5% Fe and 5% Zn); one based on cobalt and molybdenum (Fcm: 2% Co and 3% Mo); manganese phosphite (FMn: 30% P₂O₅ and 9% Mn); and the FMn+Fmm, Fcm+Fmm and FMn+Fcm+Fmm associations compared to a boscalid fungicide and a control with no treatment. The disease severity, the chlorophyll a and b contents, the net photosynthetic rate (LPR), the phenylalanine ammonia lyase (PAL) activity and the lignin content in leaves were assessment. Based on the severity, the area under the disease severity progress curve (AUSPC) and the efficiency of disease control in relation to untreated plants were calculated. The experimental design was in randomized blocks with eight treatments and three replications. Treatments FMn+Fmm and Fcm were the most effective in reducing the AUPSC in comparison with the control and promoted an increased activity of PAL. FMn was the treatment that promoted the highest increase in the LPR. There were no effects of the treatments on the lignin content compared to the control.     

Unequal Crossing over at the Rrna Tandon as a Source of Quantitative Genetic Variation in Drosophila

Abdominal bristle selection lines (three high and three low) and controls were founded from a marked homozygous line to measure the contribution of sex-linked "mutations" to selection response. Two of the low lines exhibited a period of rapid response to selection in females, but not in males. There were corresponding changes in female variance, in heritabilities in females, in the sex ratio (a deficiency of females) and in fitness, as well as the appearance of a mutant phenotype in females of one line. All of these changes were due to bb alleles (partial deficiencies for the rRNA tandon) in the X chromosomes of these lines, while the Y chromosomes remained wild-type bb⁺. We argue that the bb alleles arose by unequal crossing over in the rRNA tandon.—A prediction of this hypothesis is that further changes can occur in the rRNA tandon as selection is continued. This has now been shown to occur.—Our minimum estimate of the rate of occurrence of changes at the rRNA tandon is 3 x 10^-4. As this is substantially higher than conventional mutation rates, the questions of the mechanisms and rates of origin of new quantitative genetic variation require careful re-examination.     

The status of Jambadostrobus Chandra and Surange (Glossopteridales)

Jambadostrobus was established to accommodate fossils consisting of several multiovulate elliptical–ovate fructifications attached to the midline of glossopterid leaves. Two species have been assigned to the genus: J. pretiosus (the type species) and J. hillii from the Late Permian of India and Early Permian of Australia, respectively. Re-investigation of the original specimens reveals that only solitary fructifications are attached to the subtending leaf in J. pretiosus, hence the species is transferred to Plumsteadia, which was founded on equivalent characters. The putative reproductive organs constituting the single Australian specimen of J. hillii are re-interpreted to constitute a broad area of preservational damage on the leaf, hence Jambadostrobus is considered to be a nomen illegitimum.     

关于本刊

《生物工程学报》是由中国科协批准,中国科学院主管,中国科学院微生物研究所和中国微生物学会共同主办的综合性的学术刊物,系中国自然科学核心期刊。主要报道我国生命科学领域科学和技术的新进展和新成果,刊登的内容包括:基因工程、细胞工程、组织工程、酶工程、蛋白质工程、发酵工程、生物制药、生物反应器、基因芯片等各个方面,涉及工业、农业和医学等诸多领域。刊载     

About

<正>Founded in 1985,Chinese Journal of Biotechnology is the official journal of the Institute of Microbiology,the Chinese Academy of Sciences and the Chinese Society for Microbiology.Chinese Journal of Biotechnology is an international,peer-reviewed journal that publishes original papers and reviews on all aspects of Biotechnology,such as genetic engineering,cell engineering,enzyme engineering,biochemical     

About

<正>Founded in 1985,Chinese Journal of Biotechnology is the official journal of the lnstitute of Microbiology,the Chinese Academy of Sciences and the Chinese Society for Microbiology.Chinese Journal of Biotechnology is an international,peer-reviewed journal that publishes original papers and reviews on all aspects of Biotechnology,such as genetic engineering,cell engineering,enzyme engineering,biochemical engineering,tissue engineering,biochips,bioinformatics,     

关于本刊

《生物工程学报》是由中国科协批准,中国科学院主管,中国科学院微生物研究所和中国微生物学会共同主办的综合性的学术刊物,系中国自然科学核心期刊。主要报道我国生命科学领域科学和技术的新进展和新成果,刊登的内容包括:基因工程、细胞工程、组织工程、酶工程、蛋白质工程、发酵工程、生物制药、生物反应器、基因芯片等各个方面,涉及工业、农业和医学等诸多领域。     

About

<正>Founded in 1985,Chinese Journal of Biotechnology is the official journal of the Institute of Microbiology,the Chinese Academy of Sciences and the Chinese Society for Microbiology.Chinese Journal of Biotechnology is an international,peer-reviewed journal that publishes original papers and reviews on all aspects of Biotechnology,such as genetic engineering,cell engineering,enzyme engineering,biochemical engineering,tissue engineering,biochips,bioinformatics,bioreactor,and so on.The journal is indexed/abstracted in various important citation resources such as Chemistry     

About nannobacteria

Bacterial nanocells 0.2-0.3 micron in size and hundreds of a cubic micron in volume have been revealed in natural habitats and obtained in pure cultures. The taxonomic analysis of naturally occurring nanobacteria showed that they belong to the known taxa of the kingdom Eubacteria. The results of the cytological investigation of nanocells suggest that they are universally formed in response to stress impacts.