Alleviation of manganese phytotoxicity in barley with calcium
Alleviation of manganese phytotoxicity in barley with calcium
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DOI：
10.1080/01904160500416463
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发表时间：
2006-01-01
影响因子：
2.1
通讯作者：
Kawai, S
中科院分区：
文献类型：
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作者：
Alam, S;Kodama, R;Kawai, S
为了阐明钙（Ca）减轻锰（Mn）植物毒性的机制，大麦植物在以下条件下生长：（1）单独的营养液（对照），（2）营养液+25 μ M Mn（Mn毒性），和（3）营养液+25 μ M Mn +20 mM Ca（Ca减轻）。还进行了使用Mn-54和Fe-59（铁）与2.0或20 mM Ca对植物根的饲喂实验。高钙（20 mM）喂养条件下，对照植物中Mn-54的吸收和转运降低。Mn-54向锰毒或钙缓解植物地上部的转运也被高钙饲养条件所降低，但Mn-54被植物根部吸收不受影响。Fe-59在植物体内的吸收和转运不受高钙饲养条件的影响。钙缓解锰对大麦的药害可能主要是通过抑制锰向地上部的转运。
In order to clarify the mechanism by which calcium (Ca) alleviates manganese (Mn) phytotoxicity, barley plants were grown under the following conditions: (1) nutrient solution alone (control), (2) nutrient solution + 25 mu M Mn (Mn-toxic), and (3) nutrient solution + 25 mu M Mn + 20 mM Ca (Ca-alleviated). Feeding experiments using Mn-54 and Fe-59 (iron) with 2.0 or 20 mM Ca to the plant roots were also conducted. The absorption and translocation of Mn-54 in the control plants were lowered by the high-Ca (20 mM) feeding condition. The translocation of Mn-54 to shoots of Mn-toxic or Ca-alleviated plants was also lowered by the high-Ca feeding condition, but Mn-54 absorption by roots of the plants was unaffected. The absorption and translocation of Fe-59 in the plants was unaffected by the high-Ca feeding condition. Calcium alleviation of Mn phytotoxicity in barley may be induced mainly by the inhibition of Mn translocation to shoots.