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《低溫和長(zhǎng)時(shí)間貯藏對(duì)煙草種子萌發(fā)和幼苗滲透調(diào)節(jié)物質(zhì)的影響.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、南方農(nóng)業(yè)學(xué)報(bào)JournalofSouthernAgriculture2014.45(11):1943—1946ISSN2095—1191;CODENNNXAABhttp://www.nfnyxb.cnDOI:10.39690:issn.2095—1191.2014.11.1943低溫和長(zhǎng)時(shí)間貯藏對(duì)煙草種子萌發(fā)和幼苗滲透調(diào)節(jié)物質(zhì)的影響盧軍,婁偉,羅琳,朱先洲(四川省涼山州煙草專賣局,四川西昌615000)摘要:【目的】探討低溫和長(zhǎng)時(shí)間貯藏對(duì)煙草種子萌發(fā)和滲透調(diào)節(jié)物質(zhì)的影響,為煙草種子貯藏和育苗提供參考。【方法】以長(zhǎng)時(shí)間貯藏(15年)和當(dāng)年收獲的煙草品種“紅花大金元
2、”裸種為材料,研究低溫(16℃)和常溫(25℃)培養(yǎng)條件對(duì)種子萌發(fā)和幼苗滲透調(diào)節(jié)物質(zhì)的影響?!窘Y(jié)果】當(dāng)年收獲種子在25℃下萌發(fā)率最高,為95.9%,長(zhǎng)時(shí)間貯藏種子在16。C下萌發(fā)率最低,為67.8%;長(zhǎng)時(shí)間貯藏和低溫均能顯著降低種子的發(fā)芽勢(shì)、發(fā)芽指數(shù)和活力指數(shù)。當(dāng)年收獲種子在25℃下培養(yǎng)出的幼苗根長(zhǎng)度最長(zhǎng),為2.71cm,長(zhǎng)時(shí)間貯藏種子在16℃下培養(yǎng)出的幼苗根長(zhǎng)最短,為0.91cm,長(zhǎng)時(shí)間貯藏和低溫均能抑制幼苗的根系生長(zhǎng)。低溫和長(zhǎng)時(shí)間貯藏能顯著促進(jìn)煙苗體內(nèi)脯氨酸和可溶性糖的積累?!窘Y(jié)論】低溫和長(zhǎng)時(shí)間貯藏均會(huì)抑制煙草種子的萌發(fā)和生長(zhǎng),促進(jìn)幼苗體內(nèi)滲透調(diào)節(jié)的積累。生
3、產(chǎn)實(shí)踐中煙草種子不宜長(zhǎng)時(shí)間貯藏,育苗時(shí)應(yīng)盡量確保種子萌發(fā)的最佳溫度。關(guān)鍵詞:煙草;種子;低溫;貯藏;萌發(fā);滲透調(diào)節(jié)中圖分類號(hào):$572文獻(xiàn)標(biāo)志碼:A文章編號(hào):2095—1191(2014)11-1943—04Effectsoflowtemperatureandlong-termstorageonseedgerminationandosmoticregulationsubstancesoftobaccoLUJun,LOUWei,LUOLin,ZHUXian—zhou(LiangshanTobaccoMonopolyBureauofSiehuanProvince,X
4、ichang,Sichuan615000,China)Abstract“Objective】r11leeffectsoflong-termstorageongerminationandosmoticregulationsubstancesintobac。COseedunderlowtemperaturestresswereexploredtoprovidereferencesforseedstorageandgrowingseedlingsatlowtemperature.【Method]Nakedseedsoftobaccovariety(Honghuadaj
5、inyuan)storedfor0yearand15yearswereusedasexperimentmaterials.a(chǎn)ndtheeffectsoflOWtemperatureat16oC(25℃ascontr01)ontheirseedgerminationandOS-moficregulationsubstanceswerestudied.【ResultJIntIIisstudy,nakedseedsstoredfor0yearcultivatedat25oChadtllehi小estgerminationrate(95.9%),whilenakedse
6、edsstoredfor15yearscultivatedat16oChadthelowest(67.8%).Germinationvigor.germinationindexandvigorindexweresignificantlyreducedunderlOWtemperatureandlong—termstoragerespectively.Nakedseedsstoredfor0yearcultivatedat25oChadthelongestrootlength(2.71cm),whilenakedseedsstoredfor15yearsculti
7、vatedat16℃hadtheshortest(0.91cm).Lowtemperatureandlong—termstoragecouldinhibitrootsandhypocotylofseedling.Meanwhile.10Wtemperatureandlong—termstoragecouldpromoteaccu—mRlationoffreeprolineandsolublesugarintobaccoseedlings.【Conclusion】TheseresultsindicatedthatlOWtemper-atureandlong—ter
8、mstoragecoul