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《两种水生园艺作物对铝胁迫的生理响应-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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2、华北农学报·2015,30(3):105—110¨珊LI-$啊I∞两种水生园艺作物对铝胁迫的生理响应郑阳霞,贾松涛,向前,赵英鹏,孙远秀,张伟伟(四川I农业大学园艺学院,四JII雅安625014)摘要:为了研究豆瓣菜、大聚藻2种水生园艺作物响应铝胁迫的机制及耐铝能力,通过盆栽试验,研究了不同浓度铝处理(0,300,600,900,1200mg/kg)对豆瓣菜、大聚藻生长及生理特性的影响。结果表明,Al为300mg/kg处理下,豆瓣菜根长、地下部干质量均达最大峰值,大聚藻根长及地上部干质量与对照差异不显著;梯度铝处理
3、下,豆瓣菜地上部分干质量、根系活力呈下降趋势,大聚藻铝处理则各组差异不显著。对生理指标的进一步研究发现,随土壤A1“浓度的增加,豆瓣菜膜脂伤害指标丙二醛(MDA)含量呈升高趋势,可溶性蛋白含量(Pr)、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性均呈先升后降的趋势,脯氨酸(Pro)含量、超氧化物歧化酶(SOD)活性均呈降低趋势。大聚藻除Pr含量呈升高趋势,SOD含量呈先升后降趋势外,其他指标与豆瓣菜各生理指标变化趋势相似。综合各指标可知,低浓度的Ar(300mg/kg)处理下,豆瓣菜生长指标所受促进作用较大聚藻明显,随Al”浓度的升高,铝
4、对豆瓣菜根长、干质量、叶绿素含量的促进作用逐渐消失,抑制作用较大聚藻也更明显,即豆瓣菜较大聚藻表现出对铝的敏感性。铝胁迫下,二者生理变化有所差异,但从生长指标上看都表现出对铝胁迫较好的耐受性。关键词:铝胁迫;豆瓣菜;大聚藻;叶绿素;丙二醛;脯氨酸;抗氧化酶中图分类号:$63.O1文献标识码:A文章编号:1000—709l(2015)O3—0lO5—06dol:10.7668/hbnxb.2015.03.019TheGrowthandPhysiologicalCharacteristicsResponseofTwoAquaticHorticult
5、uralSeedlingstoTreatmentswithAluminumZHENGYang-xia,JIASong—tao,XIANGQian,ZHAOYing—peng,SUNYuan—xiu,ZHANGWei—wei(CollegeofHorticulture,SichuanAgriculturalUniversity,Yaan625014,China)Abstract:OurobjectivewastoexploretheeffectsofcontinuedA1stressongrowthandphysiologicalcharacte
6、r—isticsofNasturtiumofficinaleandMyriophyllumaquaticumseedlings.NasturtiumofficinaleandMyriophyllumaquat—icumseedlingsweretreatedwithcontinuedA12(SO4)3·18H2O(0,300,600,900,1200mg/kg)inplasticpotswithsoil.WestudiedtheeffectsofcontinuedA1stressOilgrowthandphysiologicalcharacte
7、risticsafter30days.There-suitsshowedthatwithAI”treatmentunder300mg/kg,theNasturtiumofficinalerootlength,rootbiomass,chIoro—phyllcontentreachedthemaximumpeak,whilethegrowthofMyriophyllumaquaticumwasalmostnotaffectedbyAI.Furtherstudyonphysiologicalindexfoundthatwiththeincrease
8、ofsoilaluminumconcentration,Nasturtiumoffi—cinalemembranedamageofmal0ndia1dehyde(MDA)contentincreased;relatingtheindexoftolerance,withthesoilaluminumconcentrationincreasing,ascorbateperoxidase(APX)activityincreased,solubleproteincontent(Pr),peroxidase(POD)activity,catalase(C
9、AT)activitywereincreasedfirstandthendecreased;proline(Pro)con—tent,superoxi
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