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作 者 ：姚素梅1;2;王维金2;陈国兴2

期 刊 ：植物营养与肥料学报 2006年 12卷 1期 页码：70-75

关键词：5-氨基酮戊酸；32P示踪；磷素；水稻；吸收；分配；

Keywords:5-aminolevulinicacid, 32Ptracer, phosphate, rice, uptake, distribution,

摘 要 ：以两系杂交粳稻鄂粳杂1号为材料,应用³²P示踪技术比较研究了在始穗期喷施不同浓度(10.mg/L、30.mg/L、50.mg/L)的5-氨基酮戊酸(5-Aminolevulinic.acid,ALA)对水稻植株中32P吸收与分配的影响。结果表明,10～50.mg/L.ALA处理稻株的穗、叶片、茎鞘、根系中的³²P比活度和放射性活度均显著高于不喷施ALA的对照处理;10～50mg/L.ALA处理使分配到稻株穗部的³²P活度百分比显著高于对照,在开花期、乳熟期和腊熟期分别较对照提高了4.3%～6.0%、4.1%～5.0%和2.0%～2.7%。上述结果表明,10～50.mg/L.ALA处理能显著提高稻株各器官对磷素的吸收,并能明显促进磷素向穗部的运输分配,从而使10～50.mg/L.ALA处理水稻的结实率和产量显著增加,与对照相比,结实率和产量分别提高了4.8%～9.9%和5.4%～14.9%,其中以30.mg/L.ALA处理增产效果最大。

Abstract:Using the two-line Japonica hybrid rice Ejingza 1 as the experimental material,effects of different concentrations(10 mg/L,30 mg/L,50 mg/L) of 5Aminolevulinic acid(ALA) applied at initial heading stage on the phosphate uptake and distribution in rice were studied using³²P tracer method.The results were as follows: Both the ³²P specific radioactivity and³²P total radioactivity in panicle,leaf,stem and sheath,root of rice plant treated with 10—50 mg/L ALA were significantly higher than that of the control(0 mg/L ALA).The percentage of³²P translocated to the panicles of rice plant treated with 10—50 mg/L ALA was significant higher than that of the control,and was,respectively,(increased) by 4.3%—6.0% during the flowering stage,4.1%—5.0% during the milking stage, and 2.0%—2.7% (during) the dough stage.These results suggested that treatments with 10—50 mg/L ALA increased³²P uptake in rice plant and promoted³²P translocation to the panicle organ.Correspondingly the plumpness and grain weight of rice plant treated with 10—50 mg/L ALA were considerably different with that of the control.Compared with the control,treatments with 10—50 mg/L ALA increased grain ripening percentage,and grain yield by 4.8%—9.9%,5.4%—14.9% respectively.Treatment with 30 mg/L ALA possessed the highest grain ripening percentage and grain yield.

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