First Report of Leaf Spot Disease Caused by Alternaria brassicae on Cercidiphyllum japonicum in China.

Cercidiphyllum japonicum is a deciduous tree belonging to the genus Cercidiphyllum of the family Cercidiphyllaceae (Li et al., 2008). Fossil records indicated that this tree was once distributed throughout the Northern hemisphere during the tertiary period, whereas it is now only found in Japan and China as a consequence of quaternary glaciation.

De novo transcriptome analysis provides insights into the salt tolerance of Podocarpus macrophyllus under salinity stress.

Background: Soil salinization is causing ecosystem degradation and crop yield reduction worldwide, and elucidation of the mechanism of salt-tolerant plants to improve crop yield is highly significant. Podocarpus macrophyllus is an ancient gymnosperm species with a unique environmental adaptation strategy that may be attributed to its lengthy evolutionary process. The present study investigated the physiological and molecular responses of P.

A Novel and Efficient In Vitro Organogenesis Approach for Maxim.

This work was aimed at establishing an effective approach for in vitro propagation of Maxim, a medicinal and ornamental plant mainly found in eastern Xizang, in the western Sichuan region of China. We report an optimum response in the proliferation of axillary shoots from nodal segment explants (10.2 shoots/explant) on MS medium containing 3.

The complete chloroplast genome of var. , an endangered aquatic herb with extremely narrow distribution.

var. is an endangered aquatic herb with extremely narrow distribution. In this study, we assembled the chloroplast genome of this species based on the second-generation high-throughput sequencing.

Transcription factor WRKY30 mediates resistance to Cucumber mosaic virus in Arabidopsis.

WRKY transcription factors are key regulators in regulating abiotic or biotic stress response in Arabidopsis. Previous studies showed that WRKY30 expression was induced by oxidative stress treatment, fungal elicitor, SA and ABA. However, functions of WRKY30 on viral defense are not well studied.

Soil respiration in a subtropical forest of southwestern China: Components, patterns and controls.

Partitioning the components of soil respiration is crucial to understand and model carbon cycling in forest ecosystems. In this study, total soil respiration (RS), autotrophic respiration (RA), heterotrophic respiration (RH), litter respiration (RL), litterfall input and environmental factors were synchronously monitored for 2 years in a subtropical Michelia wilsonii forest of southwestern China. RH rates were often higher than RA rates during the two years except for the middle growing season (from July to September).

Simple additive simulation overestimates real influence: altered nitrogen and rainfall modulate the effect of warming on soil carbon fluxes.

Experiments and models have led to a consensus that there is positive feedback between carbon (C) fluxes and climate warming. However, the effect of warming may be altered by regional and global changes in nitrogen (N) and rainfall levels, but the current understanding is limited. Through synthesizing global data on soil C pool, input and loss from experiments simulating N deposition, drought and increased precipitation, we quantified the responses of soil C fluxes and equilibrium to the three single factors and their interactions with warming.

[Induction on callus culture and regeneration of Orostachyis fimbriatae].

Objective: To explore the effects of different hormonal combinations on induction, proliferation and differentiation of Orostachyis fimbriatae callus culture.

Methods: Aseptic seedling leaves were used as explants,the different concentrations of IAA,NAA, 6-BA and KT on induction proliferation of callus were optimized by orthogonal test to explore the optimum medium for differentiation of callus by tissue culture techniques.

Results: The best medium for induction was MS + IAA 1.

[Callus induction and plant regeneration of Sambucus chinensis].

Objective: To optimize the medium for callus and multiple shoot induction and cultural plantlets rooting of Sambucus chinensis, and to provide a basis for the development of the seedling of mass production and germplasm conservation.

Methods: The plantlet leaves, petioles, stems and shoot tips were used as explants for the study of influences of different explants and different hormones on callus and multiple shoot induction, and cultural plantlets rooting.

Results: The optimal medium for callus induction of leaves was MS +2, 4-D 1.

[Effects of drought stress on leaf gas exchange and chlorophyll fluorescence of Salvia miltiorrhiza].

Taking the seedlings of Salvia miltiorrhiza cv. Sativa (SA) and S. miltiorrhiza cv.