[Effect and Mechanism of Living Cell Agents in Alleviating Cd Stress on Wheat Seedlings].

Cadmium （Cd） pollution not only leads to the reduction in crop yields but also migrates and accumulates through the food chain, thus posing a threat to human health. It is an important issue to reduce Cd uptake and enrichment in crops and increase crop resistance to Cd stress for sustainable development of green-health agriculture. To establish a novel agronomic technique using microalgae to control Cd pollution and improve crop stress resistance, the microalga and wheat （）were employed for systematic investigation so as to the elucidate effects and mechanism of microalgae in blocking Cd migration and enhancing crop resistance to Cd stress.

Optimization of hydrolysis conditions of crop straw and its effect in culture.

Taking straws of corn, wheat, and millet as raw materials, we pretreated them with alkaline hydrogen peroxide, and then hydrolyzed by cellulase and xylanase. We selected the total sugar content in the hydrolysate as the indicator to evaluate the hydrolysis of the straws from three crop species, and further optimized the conditions. Then, the hydrolysates of three types of crop straws were used as carbon source for culture to assess their effects on microalgal cultivation.

[Symbiotic bacteria facilitate algal growth and oil biosynthesis in Scenedesmus obliquus].

We isolated bacteria from the phycosphere of Scenedesmus obliques and sequenced 16S rDNAs to establish algae-bacterial co-culture systems. Further, we examined effects of the bacteria on algal growth, and parameters associated with physio-biochemical and oil-producing characteristics of S. obliquus.