In this paper, a comparison is made on callus induction, differentiation and regeneration capacity of cotyledons, cotyledonary nodes and hypocotyls of four alfalfa cultivars: XinjiangDaye, Longdong, Gannong No.

To screen barley varieties suitable for genetic transformation that is not constrained by seasonal restrictions in field,fifteen elite barley varieties from China were compared for their callus induction and differentiation derived from mature embryos on different media.

5 mg/L 2,4-D;the adventitious callus induction rate were 100%,100%,100% and 90%,respectively by using these optimal induced mediu.

The maximum the callus percentage and minimum browning percentage were reached by mannitol pretreatment for two days in these two cultivars.

Study on callus induction and insecticidal activities of Tripterygium wilfordii Hook.f.;

Studies on callus induction and multiplication of Aconitum smomontanum;

The preliminary studies on the callus induction of Camellia japonica "Naidong";

The irradiation effect on the callus inductivity and plant differentiation rate of strawberry anther were studied.

The intensity of 100,300,600 mT magnetic field were used to treat anthers,in which a majority of pollen was in the middle development stage and/or in the side development stage of single nucleus,to improve the callus inductivity and plant regeneration rate of anther culture of Indica rice.