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KMID : 0368419910340010025
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Journal of Plant Biology
1991 Volume.34 No. 1 p.25 ~ p.30
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Effects of Cations on Adventitious Bud Formation on the Midvein of Leaf Segment in Poplar
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Abstract
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This study was designed to investigate the relationships of cations to the polar regeneration of adventitious buds on midvein segments of poplar leaves.
Basal regeneration was disturbed by adding Ca^2+. When higher concentration of exogeneous Ca^2+ was added to the WPM (Woody Plant Medium), the more adventitious buds were formed on midvein segments, and polar regeneration was inhibited. Added Ca^2+ from 0 to 9.70 mM with 0.5 mM of EGTA to WPM decreased the calcium effect. The treatment of La^3+ with 7.05 mM of Ca^2+ ovecame the effect of Ca^2+. The cations Mg^2+ and K^+ also caused regeneration on both basal and distal site. However, polar regeneration was maintained in the medium containing Ca^2+ without Mg^2+. The above result suggests that exogenous Ca^2+ or cations inhibit polar regeneration of poplar.
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