Abstract: With intact Phaseolus aureus plant as test material, this paper studied the effects of bo-ron deficiency on its axillary bud growth and polar auxin transportation. The results showed that bo-ron deficiency induced axillary bud growth significantly, while applying indole-3-acetic acid (IAA) could suppress the axillary bud growth induced by the decapitation of boron sufficient plant. When the plant deficient in boron was decapitated, applying IAA could delay the axillary bud growth. Compared with boron sufficient plant, the plant deficient in boron had an inhibited auxin basipetal movement in terms of the shorter distance of ³H-IAA peak from apex, and less total radioactivity de-tected in stem. No radioactivity was found in the axillary buds in any of the treatments, suggesting that the basipetal IAA transportation in stem rather than the IAA accumulation in bud was required for the inhibition of bud growth. A 24 h boron supply to the boron deficient plant could restore its ³H-IAA transportation.

Key words: North side of Qingliang Mountain, Macrofungi, Ecological distribution