Flavonoids: antioxidants or signalling molecules?

Mechanisms and applications of plant growth promoting rhizobacteria: Current perspective

Abiotic stress is one of the severe stresses of environment that lowers the growth and yield of any crop even on irrigated land throughout the world. A major phytohormone abscisic acid (ABA) plays an essential part in acting towards varied range of stresses like heavy metal stress, drought, thermal or heat stress, high level of salinity, low temperature and radiation stresses. It also finds its role in various developmental processes including seed germination, seed dormancy, and closure of stomata. Abscisic acid acts by modifying the expression level of gene and subsequent analysis of cis- and trans-acting regulatory elements of responsive promoters. It also interacts with the signaling molecules of processes involved in retorting to stresses and development of seeds. On the whole, the stress to a plant can be susceptible or tolerant by taking into account the coordinated activities of various stress-responsive genes. Numbers of transcription factor are involved in regulating the expression of abscisic acid responsive genes by acting together with their respective cis‑acting elements. Hence, for improvement in stress-tolerance capacity of plants, it is necessary to understand the mechanism behind it. On this ground, this article enlightens the importance and role of ABA signaling with regard to various stresses as well as regulation of abscisic acid biosynthetic pathway along with the transcription factors for stress tolerance.

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Abscisic Acid Signaling and Abiotic Stress Tolerance in Plants: A Review on Current Knowledge and Future Prospects.

Background
Agricultural production is often limited by low phosphorus (P) availability. In developing countries, which have limited access to P fertiliser, there is a need to develop plants that are more efficient at low soil P. In fertilised and intensive systems, P-efficient plants are required to minimise inefficient use of P-inputs and to reduce potential for loss of P to the environment.

Plant and microbial strategies to improve the phosphorus efficiency of agriculture

Fundamentals of Molecular Evolution Dan Graur, Wen ... Bio 113/244 Fundamentals of Molecular Evolution Fundamentals of Molecular Evolution | Briefings in ... Fundamentals of Molecular Evolution by Dan Graur Fundamentals of Molecular Evolution: 9780878932665 ... Fundamentals of Molecular Evolution | Dan Graur, Wen ... (PDF) Fundamentals of molecular evolution Fundamentals Of Molecular Evolution Fundamentals of Molecular Evolution Dan Graur; Wen ... eBook [PDF] Fundamentals Of Molecular Evolution Download ... Fundamentals of molecular evolution Fundamentals Of Molecular Evolution FUNDAMENTALS OF MOLECULAR EVOLUTION Fundamentals of Molecular Evolution: Amazon.co.uk: Graur D ... Fundamentals of Molecular Evolution, 2nd Edition FUNDAMENTALS OF MOLECULAR EVOLUTION Fundamentals of molecular evolution : Li, Wen-Hsiung ... Molecular evolution Wikipedia

Fundamentals of molecular evolution

In this study, plant samples of five species were collected from the Dokdo islands in South Korea. Plant samples such as Asparagus schoberioides, Corydalis platycarpa, Festuca rubra, Sedum oryzifolium, and Setaria viridiswere collected from the Dongdo and Seodo. Endophytic fungal strains were isolated from the roots of five plants from the Dokdo islands. Thirty-three fungal strains were isolated from these native plants. All the endophytic fungi were analyzed by internal transcribed spacer (ITS) sequencing (ITS containing ITS1, 5.8s, and the ITS2 region). Waito-c rice seedlings were treated with fungal culture filtrates to test their plant growth-promoting activity. A bioassay of the D-So-1-1 fungal strain isolated from S. oryzifoliumconfirmed that it has the highest plant growth-promoting activity. All the endophytic fungi belong to four orders: Eurotiales (86%), Capnodiales (3%), Hypocreales (4%), and Incertae sedis (7%). The endophytic fungi were classified as Ascomycota, which contained Aspergillus(12%), Cladosporium(3%), Eurotium (3%), Fusarium(18%), Microsphaeropsis(6%), and Penicillium( 58%) at the genus level.

해안 생태계의 복원을 위하여 독도에 자생하는 식물로부터 분리된 내생진균류의 식물생장촉진활성과 유전학적 다양성

Sumera Afzal Khan, Jin-Hyung Lee, Muhammad Hamayun, Anwar Hussain, Abdul Latif Khan,Muhammad Waqas, In-Jung Lee & Jong-Guk Kim (2015) Alteration in the gene expression of Glehnia littoralis seedlingsexposed to culture filtrate of Penicillium citrinum KACC43900, Journal of Plant Interactions, 10:1, 51-58, DOI:10.1080/17429145.2014.956236

RESEARCH ARTICLE Alteration in the gene expression of Glehnia littoralis seedlings exposed to culture filtrate of Penicillium citrinum KACC43900

Microbes are essential in biofloc technology for controlling nitrogen levels in water. The composition and function of microorganisms with biofloc systems were reported; however, data on microorganisms other than bacteria, such as algae (which are essential in the nitrogen cycle) and zooplankton (which are bacterial and algal predators), remain limited. The microbial communities (including bacteria, algae, zooplankton, and fungi) were investigated in shrimp farms using biofloc technology. Using Illumina MiSeq sequencing, the V4 region of 18S rRNA and the V3–V4 region of 16S rRNA were utilized for the analysis of the eukaryotic and prokaryotic microbial communities. As a result, it was found that the biofloc in the shrimp farm consisted of 48.73%–73.04% eukaryotic organisms and 26.96%–51.27% prokaryotic organisms. In these shrimp farms, prokaryotic microbial communities had higher specie richness and diversity than eukaryotic microbial communities. However, the eukaryotic microbial communities were more abundant than their prokaryotic counterparts, while algae and zooplankton dominated them. It was discovered that the structures of the microbial communities in the shrimp farms seemed to depend on the effects of predation by zooplankton and other related organisms. The results provided the nitrogen cycle in biofloc systems by the algal and bacterial groups in microbial communities.

The microbial communities (bacteria, algae, zooplankton, and fungi) improved biofloc technology including the nitrogen-related material cycle in Litopenaeus vannamei farms

Wetlands exhibit intermediate characteristics of both terrestrial and aquatic ecosystems, and the biodiversity is rich in these unique biological habitats. The symbiotic relationships between plants and fungi that inhabit these wetlands play an important role in natural resource management, biodiversity, and conservation. Accordingly, the mujechi, having academic value for the study of the natural environment, was investigated in terms of genetic diversity of endophytic fungi, which inhabit the roots of wild plants. The internal transcribed spacer (ITS) region was amplified to identify fungal strains. In total, 226 strains were isolated and categorized into three phyla, seven classes, 10 orders, 22 families, and 31 genera. In plants by endophytic fungi were classified in Isachne globosa (Ig) to 19 genera, Scirpus karuisawensis (Sk) to 11 genera, Utricularia racemosa (Ur) to 19 genera, and one incertae sedis, Eriocaulon decemflorum (Ed) to 11 genera. The fungal taxa was identified the genera Acephala (19.9%), Tolypocladium (16.3%), Neopestalotiopsis (11.5%), and Perenniporia (7.1%). The fungal group isolated from Isachne globosa (Ig) grew the largest number of isolated fungal strains. After comprehensive evaluation, the endophytic fungal group from Utricularia racemosa (Ur) ranked highest in diversity analyses. From the roots of wild plant in mujechi-neup, it confirmed the distribution and diversity of endophytic fungi. This study provides the basic data to understand fungal community structure in peat wetlands.

http://www.koreascience.kr:80/article/JAKO201608259725094.pdf

Community Analysis of Endophytic Fungal strains Isolated from the Roots of Plants Inhabiting Mujechi-neup

Here, we report the draft genome sequence of Aquamicrobium lusatiense NLF2-7, a Gram-negative, aerobic, non-flagellum-forming, rod-shaped bacterium that was isolated from livestock wastewater in South Korea. The assembled genome sequence is 5,201,486 bp, with 4,972 protein-coding sequences in 12 contigs, and possess the genes for the sulfur oxidation pathway. ABSTRACT Here, we report the draft genome sequence of Aquamicrobium lusatiense NLF2-7, a Gram-negative, aerobic, non-flagellum-forming, rod-shaped bacterium that was isolated from livestock wastewater in South Korea. The assembled genome sequence is 5,201,486 bp, with 4,972 protein-coding sequences in 12 contigs, and possess the genes for the sulfur oxidation pathway.

Jong-Guk Kim

Papers

해안 생태계의 복원을 위하여 독도에 자생하는 식물로부터 분리된 내생진균류의 식물생장촉진활성과 유전학적 다양성

RESEARCH ARTICLE Alteration in the gene expression of Glehnia littoralis seedlings exposed to culture filtrate of Penicillium citrinum KACC43900

The microbial communities (bacteria, algae, zooplankton, and fungi) improved biofloc technology including the nitrogen-related material cycle in Litopenaeus vannamei farms

Community Analysis of Endophytic Fungal strains Isolated from the Roots of Plants Inhabiting Mujechi-neup

Draft Genome Sequence of a Sulfur-Oxidizing Bacterium, Aquamicrobium lusatiense NLF2-7, Isolated from Livestock Wastewater