[Effects of boron on indole-3-acetic acid transportation in intact phaseolus aureus plant].
With intact Phaseolus aureus plant as test material, this paper studied the effects of boron deficiency on its axillary bud growth and polar auxin transportation. The results showed that boron 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 detected 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.
Jiao
Xiao-yan
XY
Provincial Key Laboratory of Soil Environment and Nutrient Resources, Institute of Soil and Fertilizer, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China. Xiaoyan_jiao@yahoo.com.cn
Yang
Zhi-ping
ZP
Zhao
Rui-fen
RF
Wang
Li-zhi
LZ
D001692:Biological Transport; D001895:Boron / Q000032:analysis / Q000494:pharmacology*; D007210:Indoleacetic Acids / Q000378:metabolism*; D027805:Phaseolus / Q000254:growth & development* / Q000378:metabolism; D018547:Plant Stems / Q000378:metabolism
D007210:Indoleacetic Acids; C030737:indoleacetic acid; D001895:Boron