Changes of Mineral Nutrient Elements in Growing Period of Whasan Pear

Establishment of Regeneration Systems of Pyrus ussuriensis Leaves;

The effects of automobile exhaust on chlorophyll fluorescence parameters of 4 tree species,Acer mono Malus bacata Pyrus ussuriensis and Acer ginnala were tested by means of fumigation in open top chamber.

In this paper,the gradient (0,10,50,100,200 mg·kg~ -1) of soil Cd concentrations was established by mixing CdCl_2 with soil and sand,and the growth responses of four northern broadleaved tree species Acer ginnala Pyrus ussuriensis,Acer mono and Malus baccata to soil Cd contamination were studied by growing their seedlings in pots in greenhouse.

The leaves of aseptic plant were obtained through seed and stem culture in vitro and then were selected as explants, in order to establish the leave regeneration systems for Pyrus ussuriensis Maxim and transform gene roIb into it.

Using shoot tips growing from germinated seed as explant, in vitro culture and rapid propagation of Pyrus ussuriensis Maxim.

Self-writing of Yu Lihua s Novels;

From concern over the Lost Generation and care for the peripheral group to thoughts over the universal human nature,Yu Lihua portrays the Chinese Diaspora living in North America who have deep-rooted memory of Chinese culture and whose feeling dangled between experiences of two different cultures.

It s closely related between the changing track in Yu Lihua s soul who is originator of overseas students literature and the formation and development of literature for overseas students.

Zhonghuayuli,a new high quality,late season and long keeping quality pear cultivar;

Study on Parastic Wasp of Sinitinea pyrigalla Yang;