Extraction optimization, antioxidant activity, and tyrosinase inhibitory capacity of polyphenols from .

The objective of this research was twofold: first, to optimize the extraction process of polyphenols using a response surface methodology, and second, to study the antioxidant activity and tyrosinase inhibitory capacity of the polyphenols of different purities. High-speed shearing homogenization extraction was used to extract the polyphenols from . The antioxidant activity and the effect of polyphenols on tyrosinase activity were studied using free radical scavenging assay and the tyrosinase method, respectively.

Tracheophyte of Xiao Hinggan Ling in China: an updated checklist.

Background: This paper presents an updated list of tracheophytes of Xiao Hinggan Ling. The list includes 124 families, 503 genera and 1640 species (Containing subspecific units), of which 569 species (Containing subspecific units), 56 genera and 6 families represent first published records for Xiao Hinggan Ling. The aim of the present study is to document an updated checklist by reviewing the existing literature, browsing the website of National Specimen Information Infrastructure and additional data obtained in our research over the past ten years.

A new species of genus Guenée, 1854 from Mt Taibai, China (Lepidoptera, Erebidae, Hypeninae).

A new species, Han, is described from Mt Taibai, China. The new species is illustrated with images of adults and genitalia, and compared with Han, 2008, Gaal, 1998 and Leech, 1900.

Effects of experimental N addition on plant diversity in an old-growth temperate forest.

Temperate forest ecosystems have experienced mounting negative effects due to increasing levels of nitrogen (N) deposition. We examined the effects of experimental N addition on plant diversity in an old-growth temperate forest to test the following hypothesis: Long-term excessive N addition decreases plant diversity by affecting the growth of plants, which results from changes in the soil nutrient content and a decrease in the soil pH in temperate forests. Experimental N additions were administered at the following levels since 2008: control (0 kg N hayear), low N (30 kg N ha year), medium N (60 kg N hayear), and high N (120 kg N ha year).

Characterization of thiol-based redox modifications of SNF1-related protein kinase 2.6-2C.

Sucrose nonfermenting 1-related protein kinase 2.6 (SnRK2.6), also known as Open Stomata 1 (OST1) in , plays a pivotal role in abscisic acid (ABA)-mediated stomatal closure.

What factors potentially influence the ability of phylogenetic distance to predict trait dispersion in a temperate forest?

Although phylogenetic-based approaches have been frequently used to infer ecological processes, they have been increasingly criticized in recent years. To date, the factors that affect phylogenetic signals and further the ability of phylogenetic distance to predict trait dispersion have been assumed but not empirically tested. Therefore, we investigate which factors potentially influence the ability of phylogenetic distance to predict trait dispersion.

The effects of elevated CO (0.5%) on chloroplasts in the tetraploid black locust ( L.).

Some ploidy plants demonstrate environmental stress tolerance. Tetraploid (4×) black locust ( L.) exhibits less chlorosis in response to high CO than do the corresponding diploid (2×) plants of this species.

Phylogenetic conservatism and trait correlates of spring phenological responses to climate change in northeast China.

Climate change has resulted in major changes in plant phenology across the globe that includes leaf-out date and flowering time. The ability of species to respond to climate change, in part, depends on their response to climate as a phenological cue in general. Species that are not phenologically responsive may suffer in the face of continued climate change.

Short-term effect of elevated CO concentration (0.5%) on mitochondria in diploid and tetraploid black locust ( L.).

Recent increases in atmospheric CO concentration have affected the growth and physiology of plants. In this study, plants were grown with 0.5% CO for 0, 3, and 6 days.

Effects of local biotic neighbors and habitat heterogeneity on seedling survival in a spruce-fir valley forest, northeastern China.

Seedlings are vulnerable to many biotic and abiotic agents, and studying seedling dynamics helps understand mechanisms of species coexistence. In this study, the relative importance of biotic neighbors and habitat heterogeneity to seedling survival was examined by generalized linear mixed models for 33 species in a spruce-fir valley forest in northeastern China. The results showed that the relative importance of these factors varied with species and functional groups.