THE AGGREGATE ROUGH ENDOPLASMIC RETICULA IN COTYLEDON DURING THE DEVELOPMENT OF BUCKWHEAT EMBRYO The Development of Embryo and Endosperm and the Accumulation of Storage Reserves in Fagopyrum esculentwn Establishment of a high efficient regeneration system in vitro and transformation mediated by Agrobacterium rhizogenes in Buckwheat (Fagopyrum esculentum) Cloning and sequence analysis of chalcone synthase gene Chs from Fagopyrum esculentum Influence of Ultraviolet B Radiation on the Phenylpropanoid Metabolism in Common Buckwheat (Fagopyrum esculentum Moench) Ameliorating Effects of Exogenous Organic Acids on Aluminum Toxicity in Buckwheat Seedlings Cloning and Sequence Comparison of CHS Gene from Tartary Buckwheat(Fagopyrum tataricum)and Common Buckwheat(Fagopyrum esculentum) Effects of seeding rate and fertilizer on photosynthetic characteristics and yield of spring Fagopyrum esculentum