Exudation of Amino Acids and Sugars from Imbibing Seeds of Several Leguminous Crops

Japanese Journal of Crop Science

Miho KAWABATA¹  Shao-Hui ZHENG¹ 

关键词: Amino acid;    アミノ酸;    Emergence;    種子;    Exudation;    出芽;    Legume;    ç³–;    Seed;    マメ科作物;    Sugar;    溶出;   

DOI  :  10.1626/jcs.69.380

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Exudation from imbibing seeds is an indicator of seed vigor and influences seedling emergence. The objective of this report was to determine the substance of exudation from the seeds and its differences among crops and cultivars. The amounts of amino acids and sugars exuded from the imbibing seeds of 66 cultivars in 8 leguminous crops were measured by HPLC. Sixteen amino acids were detected from the seeds in soybean, and 14 in kidney bean. Only two were detected from the seeds in rice bean. The amount of exudates was greatest in soybean (1020μg per gram seed), and least in rice bean (71μg per gram seed). Arginin exuded in high frequency, however, it accounted for 32%(kidney bean)to 80% (rice bean) of total amino acid exudation. The sugars exuded from the seeds were mostly fructose and glucose. The frequency of sugar exudation was high in soybean and kidney bean, but low in mung bean and rice bean, and no detection in black gram. A great deal of exudates was found in soybean(2065μg per gram seed)and kidney bean(1297μg per gram seed). It doubled the amount of amino acids exuded in these two crops. No correlation between the exudation of full seeds and crushed seeds indicated that the exudation is independent of the contents of exudates in the seed. Dramatic difference was found among 29 cultivars in soybean, since the exudation presented from no detection to the greatest deal of exudation in some cultivars. Furthermore, the large seeds were very likely easy to exude, but no significant correlation was found between exudation and thickness of seedcoat.

【 授权许可】

Unknown