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Study on the ability of adventitious root formation in leguminous crops and its relation to wet tolerance

豆科作物不定根形成能力及其与耐湿性关系的研究

基本信息

批准号：
15580014
负责人：
NADA Youich
金额：
$ 2.05万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

The purpose of this research is to compare the ability of adventitious root formation between leguminous crops and to investigate its relation to wet tolerance.First, using soybean (Glycine max Merr.cv.Asoaogari) and kidney bean (Phaseolus vulgaris L.cv.Dover) seedlings, the ability of adventitious root formation in solution culture were examined. Plants were cultivated in air bubbled (aerobic plot) or N_2 bubbled (anaerobic plot) solutions, and root and shoot dry matter, adventitious root number and length were measured. As a result, shoot and root dry matter of kidney bean was decreased in anaerobic plot, while that of soybean was same in each plot. In anaerobic conditions, adventitious root formation was accelerated only in soybean, while main and lateral root in each species were decreased.Then, in order to investigate the relation of root formation with wet tolerance, soybean (Glycine max Merr.cv.Fukuyutaka) and kidney bean (Phaseolus vulgaris L.cv.Dover) were cultivated in the paddy field. Plants were non-irrigated, intermittent-irrigated or flooded at 3 cm above the soil surface after primary leaf expanded. As a result, the intermittent-irrigated and flooded plants of kidney bean have died in early growth stage, while those of soybean have grown to harvest period. Root dry matter of intermittent-irrigated plants was higher than that of non-irrigated ones. In addition, intermittent-irrigating did not decrease growth and yield.These results suggested that there were specific differences in the ability of adventitious root formation under anaerobic conditions and that was tightly related with wet tolerance.

本研究以大豆（Glycine max Merr.cv.Asoaogari）和菜豆（Phaseolus vulgaris L.cv.多佛）幼苗为材料，采用溶液培养的方法，研究了不同豆科作物不定根形成能力的差异及其与耐湿性的关系。在通气（好氧区）和N_2通气（厌氧区）条件下培养植株，测定根和地上部干物质、不定根数和长度。结果表明，菜豆地上部和根系干物质积累量在厌氧区均呈下降趋势，而大豆地上部和根系干物质积累量在厌氧区无明显变化。在无氧条件下，只有大豆的不定根形成加快，而主根和侧根的形成减少，为了研究根系形成与大豆（Glycine max Merr.cv.Fukuyutaka）和菜豆（Phaseolus vulgaris L.cv.多佛）的耐湿性的关系，在稻田中进行了栽培试验。在初生叶展开后，在土壤表面以上3cm处对植物进行非灌溉、非灌溉或淹没。结果表明，灌溉和淹水的菜豆植株在生长早期就死亡，而大豆植株已生长到收获期。灌水处理的根系干物质含量高于不灌水处理。这些结果表明，在厌氧条件下，不定根的形成能力存在特异性差异，且与耐湿性密切相关。