In the thesis, the genetic diversity and degree of diversity of Puna chicory were studied at population level, individual level and cell level by using morphological, ecological, physilological, cytology and isozyme approaches.

The photo-physiological characteristics of Achnatherum splendens both in the enclosure and the grazing pasture were monitored in Anxi.

Influence of plant photosynthesis and transpiration character on nitrogen removal effect in wetland.;

Acclimation of photosynthesis and growth to different growth light conditions for seedlings of Cyclobalanopsis glaucoides;

Responses of PSⅡ photochemical efficiencies and photosynthesis in Brassica oleracea L.Vat Italicap leaves under strong light and high temperature;

Effect of initial substrate concentration on dynamic characteristic of hydrogen production by photosynthetic bacteria;

Dynamic membrane filtration performance in the solution of photosynthetic bacteria;

Study on decolourization of reactive red X-3B by immobilized photosynthetic bacteria adding chitosan during immobilization process;