花鈴期漬水對棉鈴對位葉光合速率、物質(zhì)累積及產(chǎn)量的影響

1、江蘇農(nóng)業(yè)學(xué)報(bào)(JiangsuJ.ofAgr.Sci.)201531(4):732~736http:www.jsnyxb.com楊長琴劉瑞顯張國偉等.花鈴期漬水對棉鈴對位葉光合速率、物質(zhì)累積及產(chǎn)量的影響[J].江蘇農(nóng)業(yè)學(xué)報(bào)201531(4):732736.doi:10.3969j.issn.10004440.2015.04.004花鈴期漬水對棉鈴對位葉光合速率、物質(zhì)累積及產(chǎn)量的影響楊長琴1劉瑞顯1張國偉1帕爾哈提買買提2婁善偉2王致春3(

2、1.江蘇省農(nóng)業(yè)科學(xué)院經(jīng)濟(jì)作物研究所農(nóng)業(yè)部長江下游棉花與油菜重點(diǎn)實(shí)驗(yàn)室江蘇南京2100142.國家棉花工程技術(shù)研究中心新疆烏魯木齊8300003.天地成微生物技術(shù)(北京)有限公司北京100083)收稿日期:20150105基金項(xiàng)目:江蘇省農(nóng)業(yè)三新工程項(xiàng)目[SXGC(2014)299]江蘇省自主創(chuàng)新項(xiàng)目[CX(13)5010]作者簡介:楊長琴(1972)女江蘇儀征人博士副研究員主要從事棉花栽培生理研究。(Tel)02584390993(Em

3、ail)ychq2003@qq.com摘要:以美棉33B為材料于棉花中部果枝開花時(shí)進(jìn)行漬水7d和14d處理研究花鈴期漬水對不同果枝部位棉鈴對位葉凈光合速率與干物質(zhì)累積及產(chǎn)量的影響。結(jié)果顯示漬水處理棉鈴對位葉凈光合速率隨漬水持續(xù)期延長而降低降幅為中部果枝上部果枝下部果枝。漬水后棉花地上部干物質(zhì)累積降低水分脅迫指數(shù)隨果枝部位的上升而增加下部果枝的干物質(zhì)分配系數(shù)增加根系、葉片分配系數(shù)降低而蕾鈴分配系數(shù)增加。漬水后棉花產(chǎn)量在不同果枝部位的表現(xiàn)與

4、物質(zhì)分配結(jié)果一致。因此花鈴期漬水降低了棉花凈光合速率致使光合產(chǎn)物減少并改變其在不同果枝及器官間的分配是不同果枝部位產(chǎn)量降低的物質(zhì)基礎(chǔ)。關(guān)鍵詞:棉花花鈴期漬水凈光合速率干物質(zhì)累積與分配產(chǎn)量中圖分類號:S562.01文獻(xiàn)標(biāo)識碼:A文章編號:10004440(2015)04073205Photosynthesisofsubtendingleavesofbollsdrymatteraccumulationcottonyieldinrespons

5、etowaterloggingduringfloweringbollfmingstageYANGChangqin1LIURuixian1ZHANGGuowei1MAMATIParhat2LOUShanwei2WANGZhichun3(1.InstituteofIndustrialCropsJiangsuAcademyofAgriculturalSciencesKeyLabatyofCottonRapeseedMinistryofAgri

6、cultureNanjing210014China2.NationalEngineeringResearchCenterfCottonUrumchi830000China3.TodoswayBiologicalTechnologyCo.Ltd.Beijing100083China)Abstract:Awaterloggingexperimentlastingf7d14dwasconductedonacottoncultivarNuCOT

7、N33Bwithpoolculturetoevaluatetheinfluenceonphotosynthesisdrymatteraccumulationyieldduringfloweringbollfmingstage.Theresultswereasfollows.Thephotosyntheticratesofsubtendingleavesofbollswerereducedoverthetimeofwaterlogging

8、thereductioninmediumfruitbranchesofcottonwasmuchmethanthatinlowerupperfruitbranches.Thedrymatterweightinabovegroundpartofcottondecreasedunderwaterloggingstressthestressindexincreasedwiththeriseoffruitbranchpositionwaterl

9、oggingduration.Thedrymatterdistributioncoefficientincreasedinlowerfruitbranchbudsbollsbutdecreasedinrootsleaves.Theperfmanceoflintyieldwereconsistentwiththatofdrymatterdistribution.Insummarywaterloggingreducedtheaccumula

10、tionofassimilatesduetodecreasedphotosynthesisaltereditsdistributionamongfruitbranchesganswhichmaycontributetothedecreaseinlintyield.Keywds:cotton(GossypiumhirsutumL.)floweringbollfmingstagewaterloggingphotosyntheticrated

11、rymatteraccumulationdistributionyield237圖1花鈴期漬水對棉鈴對位葉凈光合速率的影響Fig.1Effectsofwaterloggingonphotosyntheticrateofcottonsubtendingleavesofbollsatdifferentfruitingbranchesduringfloweringbollingstage表1花鈴期漬水對棉株干物質(zhì)累積的影響Table1Effe

12、ctsofwaterloggingondrymatterweightofcottonplantduringfloweringbollingstage年份處理干質(zhì)量(gm2)葉片莖枝蕾鈴根系下部果枝中部果枝上部果枝2007對照156.2a149.4a303.5a52.2a203.4a217.4a114.1a漬水14d65.2b89.6b156.9b25.2b176.0b115.5b20.2b2009對照177.4a154.8a302.2a

13、68.2a196.1a202.8a134.5a漬水7d71.0b83.1b182.5b28.1b114.6c109.9b72.1b漬水14d46.4c66.3c134.2c23.4b134.1b88.1c24.6c同列數(shù)字后不同小寫字母表示同一年份差異達(dá)顯著水平(P0.05)。表2花鈴期漬水對棉株水分脅迫指數(shù)的影響Table2Effectsofwaterloggingonthewaterstressindexesofcottonplan

14、tduringfloweringbollingstage年份處理水分脅迫指數(shù)葉片莖枝蕾鈴根系下部果枝中部果枝上部果枝2007漬水14d0.580.400.480.520.130.470.822009漬水7d0.600.460.400.590.410.460.46漬水14d0.740.570.560.660.320.570.822.2.2對干物質(zhì)分配的影響從表3可見漬水處理棉花葉片干物質(zhì)分配系數(shù)顯著降低(P0.05)根系分配系數(shù)也呈降低的