The influence of phytohormone on organogenesis of Hypericum perforatum L.;

The result showed that,Kt/NAA=20/3 had highest inducement of callus,6-BA/NAA=25/3,Kt/NAA=25/3,Kt/NAA=20/3 had highest organ differentiation,2,4-D connected with 6-BA,KT had not lead to organogenesis.

In the tissue culture and rapid propagation of the plant, the outside source hormone has very important function towards the organogenesis of the plantlets.

tomentosa] and Fuji apple (Malus pumila) were cultured in vitro on MS media containing various concentrations of BA, NAA or 2,4 D to induce organ differentiation, callus formation and plantlet regeneration.

The paper studied the effects of factors such as different organs,media,temperature,AgNO_3 and plant hormine on Brassica napas organ differentiation,The ideal condition for Brassiea re-generation was investigated.

Analysis on the relationship between climate factors and yeild formation during Chinese chestnut flower sex differentiation through the output data and the meteorological data of Chunan county (1973～1992) showed that the from December of the previous year to February the extreme lowest temperature,sunghine time and rainfall during the flower sex differentiation made up 75.

Differences of both floral organs and antioxidant enzyme activities in maintainer lines and sterile lines of Brassica campestris L.ssp. chinensis makino var. communis;

Comparison of the differences of floral organ and fruit development between the first and the second fruits in grape;