RELATION BETWEEN ENDOGENOUS CTK AND FLOWER BUD DIFFERENTIATION, FLOWERING STALK FORMATION IN Brassica parachitensis Bailey

Changes of endogenous Cytokinins (CTK) during growth and development of Drassica parachinensis were investigated. The results showed that CTK existed in the growing tip, the flowering stalk and the it's base part. The content of CTK in the growing tip increased gradually to a small peak value before flower bud differentiation and then decreased gradually. At the beginning of the flowering stalk formation the CTK content in growing tip rapidly increased ;tgain reaching a big peak value during the early stage, and then decreased. The CTK content in the flowering stalk increased quickly from early to middle stage, and reached the biggest content. During this period, the plant and flowering stalk both grew rapidly.