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ALUMINUM-INDUCED CITRATE EXUDATION SHOWS NOPOSITIVE RELATION WITH AL TOLERANCE IN SOYBEAN(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2003年03期
Page:
218-222
Research Field:
Publishing date:

Info

Title:
ALUMINUM-INDUCED CITRATE EXUDATION SHOWS NOPOSITIVE RELATION WITH AL TOLERANCE IN SOYBEAN
Author(s):
Huang He 　Zhao Yuechun 　Guo Xiulan
Col lege of Sciences , South China Agricultural University , Guangzhou , 510642
Keywords:
Soybean ; Al tolerance ; Cit rate exudation
PACS:
S 565.1
DOI:
10.11861/j.issn.1000-9841.2003.03.0218
Abstract:
The varietal differences in Al -induced ci trate exudation and i ts relation to Al tolerance w ere investigated , and a comparative study of differences in organic acid secretion between Al -sensitive soybean LJ and Altolerant w heat Atlas was conducted .Soybeans were exposed to the 0 .5 mM Ca solution containing 0 and 10μM AlCl3 to identify differences in Al tolerance .Based on relative root elongation (%of control), soybeans exhibiteda range of difference in Al tolerance .Cit rate secretion under 50 mM AlCl3(24 h)st ress dif fered amongthe 8 varieties used , but no relation betw een the Al tolerance and Al -induced citrate secretion was observed .Al-induced ci trate secret ions from most of the varieties w as g reatly reduced by pre -t reatment w ith 50 AlCl3 mMfor 24 h .Sensitive soybean LJ exuded more org anic acid (ci trate only)than did Al -tolerant w heat Atlas,w hich secreted bo th cit rate and malate .Al accumulation in roo t tips w as not related to Al tolerance and Al -inducedcit rate secretion .Thus , this experiment suggests that Al -induced citrate exudation and Al accumulat ionin root tips can not be used as standards fo r screening Al -tolerant soybeans .

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Last Update: 2016-12-31