Epiphytic bacteria were isolated from Porphyra yezoensis cultivated in the fields or wildly distributed in natural coasts from Nantong (Jiangsu); Qingdao (Shandong) and Wenzhou (Zhejiang) in China, and the conchocelis cultured in Dongtai (Jiangsu) in order to investigate their diversity and the relationship with healthy culture of Porphyra.

Whether money supply actually is endogenous or exogenous is always an endless debatable problem in the financial field.

Meanwhile four exogenous variables including benefit group influence power,substitute energy,transaction price,price expectation and carbon tax and their functional mechanism on the firm demand of carbon emission right are analyzed.

The authors forecast day-ahead electricity price by generalized autoregressive conditional heteroscedasticity(GARCH) model and as exogenous variable the daily price ratios of different weekday types are led into this GARCH mode to intensify the response of the proposed model to external influences.

So in this paper,one tried to apply those theories or methods of nonparametric and semi-parametric regression to nonlinear time series model with exogenous variables.

Ectomycorrhizal morphology and root hair growth and their relationships with the growth of Pinus thunbergii seedlings;

Morphological Characteristics of Ectomycorrhiza on Pinus densiflora Seedlings;

Morphological Observation Methods of Ectomycorrhizas in Cathaya argyrophylla;

Mechanism on Increasing Plant Aluminium Resistance by Ectomycorrhizae;

The results showed that the investigated forests were all infected by ectomycorrhizae.