褪黑素引发对旱地小麦种子萌发期抗旱性的影响

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关键词：旱地小麦（TriticumaestivumL.）；褪黑素；种子引发；萌发期;抗旱性

中图分类号：S512.1;S332.4 文献标识码：A

文章编号：0439-8114（2026）02-0001-04

DOI：10.14088/j.cnki.issn0439-8114.2026.02.001 开放科学（资源服务）标识码（OSID）：

Effects of melatonin priming on drought resistance of dryland wheat at seed germination stage

WUXiu-ningla，TANGYun-xia，DUANXiao-ping2，GAOJing-xuan1b，GAO Bao-yun1b，ZHANG Jun1b，WANG Xin-junb （la.ColegeofHalthaag/“ountndOingaltdedustrUnveittepseJoa CenterofShaic；olfaeicalFodEingalUvesitagluo，ai 2.Shangnan County Agricultural Technology Service Center，Shangnan 7263Oo，Shaanxi，China）

Abstract：Inordertoclarifytheregulatoryefectofmelatoninonthedroughtresistanceofdrylandwheat（TriticumaestiumL.）duringsdgerminationstage，thedryandheatvarietyShangmai56wasusedastheexperimentalmaterialtodetermineteffectsof different concentrations（0，75，150 and 300 μmol/L ）of melatonin priming on seed germination and seedling physiological indexes under different drought intensities[0， 10% ， 15% ， 20% and 25% of polyethylene glycol（PEG-6ooo）].The results indicated that withtheintensificationofdroughtstress，germinationpotential，germinationate，seedlingwaterontent，coleoptilelength，adicle length，radiclenumber，andchorophyllcontentshowedadecreasingtrend，whilesolublesugarandprolinecontentsincreased.Compared with the drought-stressed treatments that did not receive priming，melatonin priming at 75 and 150μmol/L increased germination potential and germination rate to varying degrees under 10% ， 15% ，and 20% PEG-6OoO treatments （except for germination rate under 20% PEG-6ooo），and melatonin priming at 75 ，150，and 300μmol/L significantly enhanced soluble sugar content under 10% （204号 and 15% PEG-600 treatments.Thecomprehensiveevaluation using the membership function method showed thatunder melatonin priming at 75and 150μmol/L ，the comprehensive evaluation values for the 10% and 15% PEG-6000 treatments were higher than those of the corresponding drought-stressed treatments without priming；similarly，under 300μmol/L melatonin priming，the values for the 15% and 25% PEG-600O treatments were higher than those of their respective controls without priming.In conclusion，75 and 150μmol/L melatonin priming could effectively alleviate the drought stress of 10% and 15% PEG-6000 intensities.

Key words：dryland wheat （Triticum aestivum L.）； melatonin;seed priming;seed germination stage;drought resistance

小麦（TriticumaestivumL.）是中国的第二大粮食作物[1]。（剩余5703字）