J Integr Plant Biol. ›› 1981, Vol. 23 ›› Issue (2): -.

• Research Articles •    

Studies on the Translocation and Accumulation of 14C-Labelled N-Dimethylaminosuccinmic Acid (B) in Peanut Plant

Liu Zhen-sheng and Fu Jia-rui   

Abstract: The 14C-B9 was used by smearing the surface of the leaf of peanut plant (Arachis hypogeae L.) during the flowering stage and pegging stage. The results obtained with the measurement of radioactivity were as follows: The incorporation of B9 into peanut plant was very fast, and the radioactive isotope was so much accumulated in the leaf of the main stem one hour after treatment. Foul hours after treatment, B9 would also be occurred so much in the flower. After 3 days, the radioactive isotope was accumulated in the organs of peanut plant up to the maximum amount. In the pegging stage the translocation of B9 into the organs of peanut plant was faster than that in the flowering stape having the maximum amount of accumulation in the first day. The rate of out flow of B9 from the smearing leaf was high. It was shown that the radioactivity was mainly concentrated in the young tissues of stem and leaf, and in the flower and small pod. By using microautoradiography, the radioactivity was translocated through the vascular bundle in the petiole and stem of the peanut plant. Later, it was chiefly distributed in the cortex of the stem and the palisade tissues of the leaf. In the flower, the 14C-B9 was firstly found in the vascular bundle of the filament and the petal. After 3 days, the radioactive isotope was transported into the pollen grain and concentrated in the inner wall of the pollen sac. The chromatogram of the radioactive matter extracted from the peanut plant was showed that the compound of B9 was biochemically stable and degradated not easily in the peanut plant.

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