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/L3、0 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,105~0 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;105~0mg/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,105~0 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105~0 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%1~4.9%,其中以30 mg/L ALA处理增产效果最大。
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 5-Aminolevulinic acid （ALA） applied at initial heading stage on the phosphate uptake and distribution in rice were studied using ^32p tracer method. The results were as follows： Both the ^32p specific radioactivity and ^32p 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 of 32p 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 increased ^32p uptake in rice plant and promoted ^32p 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.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2006年第1期70-75,共6页
Journal of Plant Nutrition and Fertilizers
基金
湖北省科委重点项目(96290605)资助
