Subjects: Geosciences >> Geology submitted time 2022-12-20 Cooperative journals: 《干旱区研究》
Abstract：
In China, the county is not only an important contributor to carbon emissions and a major carbon sink zone but also a key administrative unit for the implementation of China’s national goals for carbon peak and carbon neutrality. Focusing on Qingcheng County as a typical county in the Loess Plateau, we investigate the carbon emission characteristics and spatiotemporal patterns, to raise awareness of the need for ecological protection of the Yellow River Basin, while achieving high- quality development and green and low carbon transformation. The key results of our study are as follows. (1) The change and structure of county carbon emission in underdeveloped areas have distinct characteristics. Industries below the designated size are the largest source of carbon emissions in Qingcheng County, having a low proportion of industrial carbon emissions but a relatively high proportion of service sector and household carbon emissions. (2) The spatial distribution of carbon emissions in Qingcheng County conforms to the Pareto Principle: 80% of carbon emissions are concentrated in 20% of the region, which is characterized by“overall dispersion and local agglomeration”. The high carbon zones are mainly concentrated in the valley, broken plateau area, and urban area. The medium carbon zones are mainly distributed in the broken plateau area and along the traffic line. Low carbon zones are widely distributed in ridge, hill, and gully areas. (3) The county carbon emissions in the Loess Plateau show clear temporal and spatial pattern differences that are affected by differences in topography. The largest patch index of medium and high carbon zones, such as urban areas, industrial zones, and major towns, increases, the integrity improves, the diversity of carbon sources decreases, and the types tend to be single. The carbon source diversity increases and the aggregation degree decreases in the ecotone between medium carbon zones and low carbon zones, such as transportation lines and residential areas.
Subjects: Biology >> Botany >> Applied botany submitted time 2021-07-20 Cooperative journals: 《广西植物》
Abstract： The Phenylalanine Ammonia-Lyase（PAL）is a key enzyme catalyzes the the first step phenylalanine to trans-cinnamic acid involve in the process of phenylpropane metabolism. PAL gene family plays an important role in the process of plant resistance through regulating the synthesis of plant antibiotics, and is usually encode by a multi-gene family. In order to clarify the expression and thea comprehensive analysis of the millet PAL gene family under adversity stress, uses bioinformatics methods to identify and analyze the PAL gene family in millet. The results showed that millet has 11 PAL genes, which are unevenly distributed in different chromosomes. All the PAL gene family contain conserved PAL domains with 1 to 6 exons. Phylogenetic analyses show the PAL gene can be divided into 3 subfamilies, except SiPAL7 evolved into one by itself. PAL gene contains cis-acting elements that respond to hormones, adversity stress and other factors, indicating that PAL gene is widely involved in different biological regulation processes. The expression patterns of PAL gene changes obviously under different light conditions, and different genes have different response patterns. The PAL gene of millet is highly conserved, responds to different abiotic stresses. The results suggesting that PAL genes may play important roles in the regulation of development and stress responses.
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