蔗糖和IAA对青海扁茎早熟禾根茎碳代谢和激素含量的影响

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中图分类号：Q534.9 文献标识码：A 文章编号：1007-0435（2025）12-4004-11

引用格式：，等.蔗糖和IAA对扁茎早熟禾根茎碳代谢和激素含量的影响[J].草地学报，2025，33 （12） ：4004—4014 LIU Min-jie，ZHANG Chen-xu，LIU Wen-hui，et al.Effects of Sucrose and IAA on Rhizome Carbon Metabolism and HormoneContentof Poa pratensisL.var.anceps‘Qinghai'[J].Acta Agrestia Sinica，2O25，33（12）：4004-4014

Effects of Sucrose and IAA on Rhizome Carbon Metabolism and Hormone Content of Poa pratensis L. var. anceps‘Qinghai'

LIU Min-jie， ZHANG Chen-xu，LIU Wen-hui，MA Guo-sheng， YANG Wei  BAO Feng-qing， KONG Fan-mei

（1.CollgofEcologicalEnviroentandRsouesingiMiuUiversityXining，QnghaiProviceoCha;2.Keybto

ofHighVaueUtlzatioofaracteristicEoomicntsofQighaiPriceiningQnghiroviceOha；3Qga

ofAnimalScienceandVeteriaryMedicineQnghuversityKeyLaboratoryofSperiorForageGeplasminteQngha-TibetanPlatea Xining，QinghaiProvince8loo16，China;4.Haidong WaterConservancyBureau，Haidong，QinghaiProvince8lo6oo，China）

Abstract：To investigate the regulatory efects of sucrose（Suc）and indole-3-acetic acid（IAA）on rhizome development of kentucky bluegrass（Poa pratensis L.var.anceps），this study used‘Qinghai’as the experimental material to analyze the impacts of Suc and IAA on early rhizome sucrose metabolism and hormone contents.Theresults showed that both exogenous Suc and IAA promoted early rhizome development，but their mechanisms of action difered.Suc treatment could promote IAA synthesis or transport，increase IAA content in rhizomes，thereby enhancing sucrose absorption，activating the activities of sucrose decomposition-related enzymes，and this proceswas accompanied by starch accumulation. In contrast，IAA treatment could increase endogenous IAA content to promote sucrose transport to rhizomes，raise the activities of sucrose and starch decomposition enzymes，accelerate the decomposition of sucrose and starch，and inhibit starch accumulation，

thus facilitating rhizome development.Notably，Suc and IAA exhibited a synergistic effect during sucrose acumulation，while showing an antagonistic effect during starch accumulation.

Key words： Poa pratensis L. var. anceps ‘Qinghai' ; Rhizome; Sucrose; Indole-3-acetic acid; Carbon metabolism;Endogenous hormone

根茎是地下变态茎的统称，依据形态特征可分为根状茎、块茎、球茎等主要类型[1]。（剩余22941字）