文献类型：期刊文献

中文题名：腐植酸对黄瓜植株生长的影响涉及与硝酸盐浓度有关的细胞分裂素、多胺、矿质营养素浓度在植株根系和芽中的变化

英文题名：Action of Humic Acid on Promotion of Cucumber Shoot Growth Involves Nitrate-related Changes Associated with the Root-to-shoot Distribution of Cytokinins,Polyamines and Mineral Nutrients

作者：Vero nica Mora[1];Eva Bacaicoa[2];Angel-Maria Zamarreo[2];Elena Aguirre[2];Maria Garnica[2];Marta Fuentes[2];Jose-Maria Garc a-Mina[1,2];张世万[3];周霞萍[3]

机构：[1]西班牙纳瓦拉大学科学学院土壤化学系,潘普洛纳31080;[2]西班牙某集团公司,纳瓦拉31160;[3]华东理工大学资源与环境工程学院,上海200237

年份：2012

期号：2

起止页码：29

中文期刊名：腐植酸

外文期刊名：Humic Acid

语种：中文

中文关键词：纯化腐植酸;芽生长;细胞分裂素;多聚胺;脱落酸

外文关键词：purified humic acid; shoot development; cytokinins; polyamines; abscisic acid

摘要：许多研究报道腐植酸类物质能够促进不同环境下的幼苗栽培物的生长。然而对腐植酸促进植物生长的作用机理,科学工作者却知之甚少。腐植酸类物质对植物幼苗的影响涉及根质膜H+-ATP酶活性及根系和芽中硝酸根分布的主要作用,反过来,导致某些细胞分裂素,多聚胺与脱落酸根浓度的变化,从而促进新幼苗生长。这一观点,通过现阶段的试验可以得出。试验结果表明,植物根系所富集的腐植酸能显著增加植物幼苗的生长,这与植物根系H+-ATP酶活性增强有关,这种活性表现在植物幼芽中硝酸盐浓度的增加,根系浓度降低。这些作用与细胞分裂素和多胺物质的浓度在植物幼芽中显著提高是相伴随的,与植物根系浓度降低有关。同样地,多种细胞分裂素在植物幼芽和根系分布的变化与多种矿物营养素在植物幼芽和根系分布的显著变化是协调一致的。试验结果表明,腐植酸对黄瓜幼苗生长的促进作用与硝酸根的浓度直接有关,而硝酸根浓度的变化又影响了细胞分裂素和多胺物质在植物幼苗中的富集。
Numerous studies have reported the ability of humic substances to increase shoot growth in different plant species cultivated under diverse growth conditions.However,the mechanism responsible for this effect of humic substances is poorly understood.It is possible that the shoot promoting effect of humic substances involves aprimary effect on root H＋-ATPase activity and nitrate root-shoot distribution that,in turn,causes changes in the root-shoot distribution of certain cytokinins,polyamines and abscisic acid,thus affecting shoot growth.We investigated this hypothesis in the present study.The results showed that the root application of apurified humic acid causes a significant increase in shoot growth that is associated with an enhancement in root H＋-ATPase activity,an increase in nitrate shoot concentration,and a decrease in roots.These effects were associated with significant increases in the shoot concentration of several cytokinins and polyamines（principallyputrescine）,concomitant with decreases in roots.Likewise,these changes in the root-shoot distribution of diverse active cytokinins correlated well to significant changes in the root-shoot distribution of several mineral nutrients.These results,taken together,indicate that the beneficial effects of humic substances on shoot development in cucumber could be directly associated with nitrate-related effects on the shoot concentration of several active cytokinins and polyamines（principally putrescine）.