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ID:34477845
大小:2.67 MB
页数:48页
时间:2019-03-06
《高温、co2加富对温室嫁接黄瓜rubisco羧化酶活性、净光合速率和果实品质的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、分类号S642.2学校代码10129UDC635.1学号2010202041高温、CO2加富对温室嫁接黄瓜Rubisco羧化酶活性、净光合速率和果实品质的影响EffectofhightemperatureandelevatedCO2onRuBPCaseactivity,netphotosyntheticrateandfruitqualityofgraftedcucumberingreenhouses申请人:马博学科门类:农学学科专业:蔬菜学研究方向:设施蔬菜指导教师:崔世茂崔教授论文提交日期:二〇一三年六月摘要试验通过高温、CO2加富下对温室嫁接黄瓜的形态特征、Rubis
2、co羧化酶、净光合速率及果实品质进行测定分析,结果表明:(1)高温、CO2加富下温室嫁接黄瓜植株生长旺盛,株高、茎粗、叶面积、叶片厚度均明显高于其他处理。(2)高温条件下增施CO2,温室嫁接黄瓜的Rubisco羧化酶活性日变化呈“双峰”曲线,第一个峰值出现在上午9:00左右,另一个峰值出在下午15:00左右,并在两峰间13:00达到低谷,其日变化显著高于其他处理。常温条件下,CO2加富后在较低温度时(9:00),会抑制Rubisco羧化酶的活性,而温度升高后(13:00和15:00),可以提高Rubisco羧化酶的活性。单纯的高温会抑制Rubisco羧化酶的活性,而CO2
3、加富后,可以提高Rubisco羧化酶的活性,其差异显著地高于对照与常温、CO2处理。(3)高温、CO2处理温室嫁接黄瓜净光合速率的变化与其Rubisco羧化酶活性的变化呈显著的正相关关系。CO2加富可以增加温室嫁接黄瓜叶片的净光合速率,即使9:00羧化酶的活性较低时,净光合速率也高于对照和单纯高温处理。(4)高温、CO2加富可以提高温室嫁接黄瓜果实的口感和商品性,而且其可溶性糖、可溶性蛋白、游离氨基酸和维生素C含量均高于其他处理。说明,CO2加富配合高温可以更有效地提高温室嫁接黄瓜的光合作用,促进温室嫁接黄瓜植株的生长,提高果实品质。关键词:嫁接黄瓜;高温;CO2;形态;
4、Rubisco羧化酶;净光合速率;品质EffectofhightemperatureandelevatedCO2onRuBPCaseactivity,netphotosyntheticrateandfruitqualityofgraftedcucumberingreenhousesAbstractMorphologicalcharacteristics,Rubiscocarboxylaseactivity,netphotosyntheticrateandfruitqualityofgraftedcucumberseedlingsgrowningreenhouseafter
5、thehigh-temperatureandCO2-richtreatmentweretestedinthispaper,aswellasthequalityofcucumberfruit.Resultsshowedthat:(1)thegraftedcucumberingreenhouseswithhightemperatureandelevatedCO2grewvigorously,stemheight,stemdiameter,leafareaandleafthicknessweresignificantlyhigherthanothertreatments.(2)
6、DiurnalchangesofRuBPCaseactivityofgraftedcucumberingreenhouseswithinhightemperatureandelevatedCO2was"TwinPeaks"curve,thefirstpeakappearinaround9:00am,thesecondpeakappearinaround15:00pm,and13:00toreachatroughinbetweenthetwopeaks,RuBPCaseactivitiesatalltimepointsunderhightemperatureandenric
7、hedCO2weresignificantlyhigherthanothertreatments.ButtheRuBPCaseactivitycanbeinhibitedonlywithCO2enrichmenttreatmentunderlowertemperature(9:00);butwiththetemperatureincreasing(13:00and15:00),theRuBPCaseactivityrecoveredandfinallyhigherthancontrol.TheRuBPCaseactivityc
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