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1、作物學(xué)報(bào)ACTAAGRONOMICASINICA2011,37(3):489?495http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2011.00489兩個(gè)不同類型彩色棉品種纖維發(fā)育的生理特征*張祥劉曉飛呂春花董召娣陳源陳德華揚(yáng)州大學(xué)江蘇省作物遺傳生理重點(diǎn)實(shí)驗(yàn)室/農(nóng)業(yè)部長江中下游作物生理生態(tài)與栽培重點(diǎn)開放實(shí)驗(yàn)室,江蘇揚(yáng)州225009摘要:選擇天然棕色棉品種湘彩棉2號(hào)和綠色棉品種皖棉39,研究其纖維發(fā)育相
2、關(guān)生理特征。結(jié)果表明,與常規(guī)白色陸地棉蘇棉9號(hào)(對(duì)照)相比,湘彩棉2號(hào)和皖棉39纖維中纖維素含量較低,并且纖維中纖維素積累隨花后天數(shù)增加的S型曲線符合Richards方程,擬合系數(shù)達(dá)0.999以上,其纖維素積累最大值、累積速率參數(shù)、最大增長速率明顯低于對(duì)照普通白棉,且綠色棉又低于棕色棉。天然彩色棉葉片中SPAD值、可溶性糖含量、蔗糖轉(zhuǎn)化酶活性,鈴殼和纖維中腺苷三磷酸(ATP)酶活性、蔗糖合酶(SS)活性和尿苷二磷酸葡萄糖(UDPG)焦磷酸化酶活性低于普通白棉,導(dǎo)致彩色棉纖維發(fā)育過程中無法獲得充足的養(yǎng)分,最終影響其纖維品質(zhì)。這也解釋了彩色棉Richards方程模擬纖維素積
3、累速率較慢的結(jié)果。相關(guān)分析進(jìn)一步表明,彩色棉開花后40d纖維中SS活性、UDPG焦磷酸化酶活性和GA3含*****量與成熟期纖維成熟度、纖維比強(qiáng)度均呈顯著線性正相關(guān)關(guān)系(r＝0.884,r＝0.895;r＝0.914,r＝0.935;r＝0.990,r*＝0.988),說明天然彩色棉纖維中代謝物質(zhì)和關(guān)鍵酶活性低,影響了其最終纖維品質(zhì)。關(guān)鍵詞:天然彩色棉;纖維品質(zhì);酶活性PhysiologicalCharacteristicsAssociatedwithFiberDevelopmentinTwoDif-ferentTypesofNaturalColored-CottonC
4、ultivars*ZHANGXiang,LIUXiao-Fei,LüChun-Hua,DONGZhao-Di,CHENYuan,andCHENDe-HuaKeyLaboratoryofCropGeneticsandPhysiologyofJiangsuProvince/KeyLaboratoryofCropPhysiology,EcologyandCultivationinMiddleandLowerReachesofYangtseRiverofMinistryofAgriculture,Yangzhou225009,ChinaAbstract:Theobjective
5、ofthisstudywastoinvestigatethephysiologicalcharacteristicsoffiberinthesubtendingleafofnaturalcolored-cottoninfiberdevelopment,andtoprovidetheoreticalbasisforimprovementofnaturalcolored-cottonfiberqualityusingbrowncottoncultivarXiangcaimian2,greencottoncultivarWanmian39,andwhitefibercontr
6、olSumian9bymeasuringthechangesofmetaboliteandenzymeactivities.Theresultsshowedthatcomparedwiththecontrol,fibercelluloseaccumulationforXiangcaimian2andWanmian39waslower,changingwithan“S”curve,whichcouldbesimulatedwellbyRichardsequationwithafittingcoefficientofabove0.999.Maximumaccumulatio
7、n,accumulativerateparameterandmaximumaccumulativerateforcelluloseofcoloredcottonwerealllowerthanthoseofwhitecotton.SPAD,solublesugarcontent,activityofsucroseinvertaseinleafandsucroseinvertase,sucrosesynthase(SS),UGPaseactivitiesinfiberforcoloredcottonweresmallerthanthosef
