YANGBo,WUYan-you.EffectofLightIntensityontheElectronStreamTransmissionand NitrateCumulationinBrassicanapusand Orychophragmusviolaceus[J].Northern Horticulture,2012,36(12):17-20.
光强对油菜和诸葛菜电子流传递和硝酸盐累积的影响
- Title:
- EffectofLightIntensityontheElectronStreamTransmissionand NitrateCumulationinBrassicanapusand Orychophragmusviolaceus
- 文章编号:
- 1001-0009（2012）12-0017-04
- 分类号:
- S634.3
- 文献标志码:
- A
- 摘要:
- 以油菜和诸葛菜幼苗为试材，研究5个光强梯度对其光合电子流传递和叶绿素含量、光合特征、硝酸盐含量、硝酸还原酶活性的影响。结果表明：油菜和诸葛菜的光合电子流传递随光强增加，先缓慢增加后快速上升并达到最大，叶绿素含量、光合速率、硝酸还原酶活性与光强呈正相关，硝酸盐含量与光强呈负相关，诸葛菜和油菜幼苗在光照剂量分别为275和300μmol?s-1?m-2时，光合电子流传递快速增加，硝酸还原酶活性快速增强，硝酸盐含量快速下降，存在一个明显的光照强度拐点，在拐点光照强度之后，油菜和诸葛菜光合电子流传递和硝酸盐含量变化不显著。从经济角度来讲，拐点光照强度即为苗期油菜和诸葛菜的最优光照强度。
- Abstract:
- Withseedlingsof B.napus and O.violaceusasexperimentalmaterials,theeffectsoffivelightintensitygradientsonelectronstreamtransmission,chlorophyllcontent,photosyntheticcharacteristics,nitratecontentandnitratereductaseactivitywerestudied.Theresultsshowedthatwithlightintensityincreasingtheelectronstreamtransmission,firstlyslowlyincreased,andrapidlyriseduntilreachedmaximum,photosyntheticrate,chlorophyllcontentandnitratereductaseactivityof B.napusand O.violaceuswerepositivecorrelativitytolightintensity.Thecontentsofnitratewasnegativecorrelationtolightintensity.Analyzedindicatorstoobtainthat275μmol?s-1 ?m-2 and300μmol?s-1 ?m-2 respectivelywasthebestlightintensityofB.napusand O.violaceus.Inthislightintensityphotosyntheticelectronstreamrapidlyincreased,nitratereductaseactivityincreasedquickly,thenitratecontentdecreasedrapidly.Therewasaclearturningpointoflightintensity,andafterthispointthechangesofphotosyntheticelectronstream，nitratecontentandnitratecontentarenotnotable.
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备注/Memo
第一作者简介：杨波(1985-)，男，在读硕士，研究方向为农业生物环境。
责任作者：吴沿友(1966-)，男，博士，研究员，博士生导师，现主要从事农业工程方面的研究工作。E-mail:yanyouwu@ujs.edu.cn。
基金项目：江苏高校优势学科建设工程资助项目(苏财教[2011]8号)。
收稿日期：2012-03-27