Community characteristics of Arabidopsis thaliana natural populations in the northern Tianshan Mountains along with relevant environmental factors

2009 ◽  
Vol 17 (1) ◽  
pp. 51
Author(s):  
Tao Ye ◽  
Wang Dan ◽  
Liu Tong ◽  
Jiang Chengguo ◽  
Zhai Wei ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Environmental Factors ◽  
Natural Populations ◽  
Tianshan Mountains ◽  
Community Characteristics ◽  
Northern Tianshan

scholarly journals Identification and Quantification of Coumarins by UHPLC-MS in Arabidopsis Thaliana Natural Populations

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1804
Author(s):  
Izabela Perkowska ◽  
Joanna Siwinska ◽  
Alexandre Olry ◽  
Jérémy Grosjean ◽  
Alain Hehn ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
High Performance ◽  
Biological Activities ◽  
Natural Populations ◽  
Biologically Active ◽  
Stress Factors ◽  
Mass Spectrometry Analysis ◽  
Engineering Research ◽  
Spectrometry Analysis ◽  
Model Plant Arabidopsis Thaliana

Coumarins are phytochemicals occurring in the plant kingdom, which biosynthesis is induced under various stress factors. They belong to the wide class of specialized metabolites well known for their beneficial properties. Due to their high and wide biological activities, coumarins are important not only for the survival of plants in changing environmental conditions, but are of great importance in the pharmaceutical industry and are an active source for drug development. The identification of coumarins from natural sources has been reported for different plant species including a model plant Arabidopsis thaliana. In our previous work, we demonstrated a presence of naturally occurring intraspecies variation in the concentrations of scopoletin and its glycoside, scopolin, the major coumarins accumulating in Arabidopsis roots. Here, we expanded this work by examining a larger group of 28 Arabidopsis natural populations (called accessions) and by extracting and analysing coumarins from two different types of tissues–roots and leaves. In the current work, by quantifying the coumarin content in plant extracts with ultra-high-performance liquid chromatography coupled with a mass spectrometry analysis (UHPLC-MS), we detected a significant natural variation in the content of simple coumarins like scopoletin, umbelliferone and esculetin together with their glycosides: scopolin, skimmin and esculin, respectively. Increasing our knowledge of coumarin accumulation in Arabidopsis natural populations, might be beneficial for the future discovery of physiological mechanisms of action of various alleles involved in their biosynthesis. A better understanding of biosynthetic pathways of biologically active compounds is the prerequisite step in undertaking a metabolic engineering research.

scholarly journals Assessment of Inter-Sectoral Virtual Water Reallocation and Linkages in the Northern Tianshan Mountains, China

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2363
Author(s):  
Dedao Gao ◽  
Aihua Long ◽  
Jiawen Yu ◽  
Helian Xu ◽  
Shoujuan Su ◽  
...  
Keyword(s):  
Water Consumption ◽  
Animal Husbandry ◽  
Virtual Water ◽  
Tianshan Mountains ◽  
Added Value ◽  
Green Water ◽  
Economic Sector ◽  
Primary Industry ◽  
Northern Tianshan ◽  
The Government

Quantitative analysis of the reallocation and linkages of virtual water in the economic sector was important for the integrated water resources management in inland arid regions. Taking the northern Tianshan Mountains (NTM) as an example, we applied the environmental input-output model to design the accounting framework for the reallocation of blue and green virtual water (VW) in the economic sector and analyzed the correlation effect of VW reallocation among various sectors by backward and forward linkages in economic analysis. The results showed that the direct blue and green water consumption of primary industry respectively accounted for 99.2% and 100% of the total water consumption in NTM. Planting sector had the largest amount of VW outflow among all sectors. Animal husbandry, forestry and construction had a large pulling effect on VW outflow of planting sector, while planting sector and animal husbandry were the main sectors for VW export of blue and green water. We suggest that the government can increase the import of blue-green VW for agricultural raw materials through VW trade and develop industries such as service and electricity that have less pulling effect on the primary industry VW, so as to improve the economic added value of VW in the primary industry and reduce the loss of VW in primary industry production and trade flows in future water management.

scholarly journals Heterosis is common and inbreeding depression absent in natural populations of Arabidopsis thaliana

2019 ◽  
Vol 32 (6) ◽  
pp. 592-603 ◽  
Author(s):  
Christopher G. Oakley ◽  
Sverre Lundemo ◽  
Jon Ågren ◽  
Douglas W. Schemske
Keyword(s):  
Arabidopsis Thaliana ◽  
Inbreeding Depression ◽  
Natural Populations

scholarly journals Variation in the expression of a transmembrane protein influences cell growth in Arabidopsis thaliana petals by altering auxin responses

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Charlotte N. Miller ◽  
Jack Dumenil ◽  
Fu Hao Lu ◽  
Caroline Smith ◽  
Neil McKenzie ◽  
...  
Keyword(s):  
Gene Expression ◽  
Arabidopsis Thaliana ◽  
Genetic Variation ◽  
Cell Growth ◽  
Plant Growth ◽  
Cell Size ◽  
Natural Populations ◽  
Organ Size ◽  
Substantial Contribution ◽  
Over Expression

Abstract Background The same species of plant can exhibit very diverse sizes and shapes of organs that are genetically determined. Characterising genetic variation underlying this morphological diversity is an important objective in evolutionary studies and it also helps identify the functions of genes influencing plant growth and development. Extensive screens of mutagenised Arabidopsis populations have identified multiple genes and mechanisms affecting organ size and shape, but relatively few studies have exploited the rich diversity of natural populations to identify genes involved in growth control. Results We screened a relatively well characterised collection of Arabidopsis thaliana accessions for variation in petal size. Association analyses identified sequence and gene expression variation on chromosome 4 that made a substantial contribution to differences in petal area. Variation in the expression of a previously uncharacterised gene At4g16850 (named as KSK) had a substantial role on variation in organ size by influencing cell size. Over-expression of KSK led to larger petals with larger cells and promoted the formation of stamenoid features. The expression of auxin-responsive genes known to limit cell growth was reduced in response to KSK over-expression. ANT expression was also reduced in KSK over-expression lines, consistent with altered floral identities. Auxin responses were reduced in KSK over-expressing cells, consistent with changes in auxin-responsive gene expression. KSK may therefore influence auxin responses during petal development. Conclusions Understanding how genetic variation influences plant growth is important for both evolutionary and mechanistic studies. We used natural populations of Arabidopsis thaliana to identify sequence variation in a promoter region of Arabidopsis accessions that mediated differences in the expression of a previously uncharacterised membrane protein. This variation contributed to altered auxin responses and cell size during petal growth.

Community characteristics of phytoplankton in the coastal area of Leizhou Peninsula and their relationships with primary environmental factors in the summer of 2010

2012 ◽  
Vol 32 (19) ◽  
pp. 5972-5985 ◽  
Author(s):  
龚玉艳 GONG Yuyan ◽  
张才学 ZHANG Caixue ◽  
孙省利 SUN Xingli ◽  
张瑜斌 ZHANG Yubin ◽  
施玉珍 SHI Yuzhen ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Coastal Area ◽  
Community Characteristics ◽  
Leizhou Peninsula

Mycorrhizae, mycorrhizospheres, and reforestation: current knowledge and research needs

1987 ◽  
Vol 17 (8) ◽  
pp. 929-940 ◽  
Author(s):  
D. A. Perry ◽  
R. Molina ◽  
M. P. Amaranthus
Keyword(s):  
Environmental Factors ◽  
Mycorrhizal Fungi ◽  
Current Knowledge ◽  
Seedling Survival ◽  
Natural Populations ◽  
Tree Seedlings ◽  
Ecosystem Structure ◽  
Clear Cutting ◽  
Mycorrhiza Formation ◽  
Sphere Of Influence

Although not a panacea, management of mycorrhizae and associated organisms is an important reforestation aid. Its three major components are protection of the indigenous soil community and evaluation of inoculation needs, integration of inoculation programs into existing reforestation technology, and research. Clear-cutting frequently results in reduced mycorrhizae formation, particularly when reforestation is delayed and no other host plants are present to maintain fungal populations. Implications of such reductions for reforestation vary with environmental factors and tree species. Adequate mycorrhiza formation is especially critical for ectomycorrhizal trees growing on poor soils or in environments where seedlings must establish quickly to survive. It may also be important where early successional, noncrop plants do not support the same mycobiont as the crop. In such circumstances, a self-reinforcing trend may develop, with poor mycorrhiza formation reducing seedling survival and poor tree stocking leading to further loss of mycorrhizal inocula. Inoculating nursery seedlings with mycobionts holds promise for improving outplanting performance only if site-adapted fungi are used. A practical alternative is to improve nursery practices to enhance natural populations of mycorrhizal fungi. Seedlings leaving the nursery with diverse mycorrhizae may perform better than those leaving with only one or a few nursery-adapted types. Research is needed in three broad areas: on adaptations of mycorrhizal fungi to particular environmental factors; on interactions between tree seedlings and processes occurring within the sphere of influence of roots (the rhizosphere) or of mycorrhizal roots (the mycorrhizosphere); and on the role of mycorrhizae and associated organisms in ecosystem structure and processes, particularly nutrient cycling, plant-plant interaction, and soil structure.

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