夜间补光对黄瓜幼苗激素含量及养分吸收的影晌.pdfVIP

中国摩亏c歪搪 2013，29(16)：74—78 ChineseAgriculturalScienceBulletin 夜间补光对黄瓜幼苗激素含量及养分吸收的影响 李海云，刘焕红 (聊城大学农学院园艺工程系，山东聊城252059) 摘 要：为了明确夜间补光在育苗中的作用及机理 ，以 津‘研四号’为试材，研究了夜间补光O、3、6、9和 12h对黄瓜幼苗生长、内源激素含量、根系活力及养分吸收的影响。结果表明：与对照(补光0h)相比， 夜间补光处理的黄瓜幼苗干重、叶面积、根冠 比、壮苗指数、矿质元素积累量、吲哚 乙酸(IAA)、赤霉素 (GA)、(ZR+GA，+IAA)／ABA和根系活力提高，脱落酸(ABA)含量降低，这些指标的升高(或降低)幅度随 补光时间的延长而增大。黄瓜幼苗的玉米素核苷(zR)含量补光时间的延长先增加后降低，补光6h的最 高。说明夜间补光能促进黄瓜幼苗生长，这与内源激素含量、根系活力及矿质元素积累量的改变有关。 关键词：夜间补光；黄瓜；激素；养分吸收 中图分类号：$642．2 文献标志码：A 论文编号：2012—3699 EffectsofSupplementaryIlluminationatNightonHormonesContent andNutrientAbsorptionofCucumberSeedlings LiHaiyun，LiuHuanhong (Department Horticuhure，CollegeofAgriculture，LiaochengUniversily，LiaochengShandong252059) Abstract：Effectsofsupplementaryillumination0，3，6，9and12hatnightongrowth，endogenoushormones contentandnutrientabsorptionofcucumber(CucumissativusL．)seedlings(J‘inyan4’)werestudiedtoprobe theroleand mechanism ofsupplementary illumination in breedingseedlings．The resultsshowed that： comparedwiththecontrol(supplementaryillumination0h)dryweight，leafarea，R／S，seedlingindex，mineral elementsaccumulation，indoleaceticacid(IAA)，gibberellin(GA3)，(ZR+GA3+IAA)／ABAandrootactivity increasedundersupplementaryillumination，whileabscisicacid(ABA)decreased，andthechangesofthese indicatorsweremorepronouncedasthesupplementary illuminationtimeprolonging．Zeatinriboside(ZR) contentfirstlyincreased，thendecreasedwiththesupplementary illuminationtimeprolonging，anditisthe highestwhen supplementary illumination time was 6 h．These results suggested thatsupplementary illuminationatnightcanpromotethegrowthofcucumberseedlings，andthatwasconnectwiththechangesof endogenoushomr onecontent，rootactivityandaccumulationofmineralelements．