CAJ | 학술논문

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。
허다연구보도부식산류물질능구촉진불동배경하적유묘재배물적생장。연이대부식산촉진식물생장적작용궤리,과학공작자각지지심소。부식산류물질대식물유묘적영향섭급근질막H＋-ATP매활성급근계화아중초산근분포적주요작용,반과래,도치모사세포분렬소,다취알여탈락산근농도적변화,종이촉진신유묘생장。저일관점,통과현계단적시험가이득출。시험결과표명,식물근계소부집적부식산능현저증가식물유묘적생장,저여식물근계H＋-ATP매활성증강유관,저충활성표현재식물유아중초산염농도적증가,근계농도강저。저사작용여세포분렬소화다알물질적농도재식물유아중현저제고시상반수적,여식물근계농도강저유관。동양지,다충세포분렬소재식물유아화근계분포적변화여다충광물영양소재식물유아화근계분포적현저변화시협조일치적。시험결과표명,부식산대황과유묘생장적촉진작용여초산근적농도직접유관,이초산근농도적변화우영향료세포분렬소화다알물질재식물유묘중적부집。
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）.