本文選題：鹽堿脅迫 + 甜菜　； 參考：《內(nèi)蒙古農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：甜菜是糖料作物的主要來源之一。中國的甜菜種植和生產(chǎn)集中分布在北緯40度北部,其中包括北部三個(gè)產(chǎn)區(qū)。內(nèi)蒙古是全國前三大甜菜產(chǎn)區(qū)之一,占中國甜菜總種植面積的36%以上,是中國甜菜總產(chǎn)量的39%左右,鹽堿土種植甜菜已有百年的歷史。研究鹽堿土不同鹽堿化程度對(duì)甜菜出苗率生長發(fā)育過程及其糖分積淀等品質(zhì)影響具有重要的意義。本文以收集的15份耐鹽堿甜菜種質(zhì)資源為研究對(duì)象,進(jìn)行大面積盆栽試驗(yàn),設(shè)計(jì)出不同鹽堿梯度處理對(duì)甜菜幼苗出苗率、干鮮重、葉綠素、超氧化物歧化酶(SOD)、丙二醛(MDA)含量及葉片質(zhì)膜透性的影響。研究結(jié)果表明:1.通過對(duì)不同甜菜品種的耐鹽性(鹽堿含量梯度)、鹽脅迫下生化指標(biāo)(SOD、MDA、電導(dǎo)率)與葉綠素與干鮮三方面的初選與復(fù)選,通過試驗(yàn)對(duì)15份材料進(jìn)行篩選,得出'H003'耐鹽堿性較強(qiáng)、出苗率高,可作為本論文盆栽實(shí)驗(yàn)的主要栽培品種。2.鹽堿脅迫使甜菜葉片的超氧化物歧化酶(SOD)活性隨著鹽堿脅迫程度的增大,脅迫時(shí)間的延長呈先升高后降低的趨勢,且下降幅度隨之增大。3.甜菜幼苗葉片質(zhì)膜透性和丙二醛(MDA)含量與鹽堿脅迫程度的增加成正比關(guān)系,表明其受甜菜幼苗有機(jī)物積累呈過氧化狀態(tài),有機(jī)物累計(jì)積累顯著減少。4.大量盆栽試驗(yàn)表明,在盆栽的整個(gè)過程中甜菜幼苗生長始終處于鹽脅迫之中,但是隨著生長發(fā)育進(jìn)程盆栽土壤的鹽堿化程度在逐漸減輕,pH值下降,說明甜菜幼苗的生長有改良作用,尤以NaCl、NaHCO_3含量下降最為明顯。
[Abstract]:Sugar beet is one of the main sources of sugar crops. Sugar beet cultivation and production in China are concentrated in the north of latitude 40 degrees north, including the three northern regions. Inner Mongolia is one of the top three sugarbeet production areas in China, accounting for more than 36% of the total sugarbeet planting area in China and about 39% of the total sugarbeet yield in China. The sugarbeet has been planted in saline-alkali soil for a hundred years. It is of great significance to study the effects of different salinization degrees on the growth and development process of sugarbeet emergence rate and sugar accumulation in saline-alkali soil. In this paper, 15 salt-tolerant sugarbeet germplasm resources were collected as the research object, and a large area pot experiment was carried out, and different saline-alkali gradient treatments were designed to treat the seedling emergence rate, dry fresh weight and chlorophyll content of sugarbeet seedlings. Effects of superoxide dismutase (SOD) and malondialdehyde (MDA) on plasma membrane permeability of leaves. The results of the study show that 1: 1. The salt tolerance of different sugarbeet varieties (saline-alkali content gradient, biochemical index SOD MDA-conductivity), chlorophyll and dry fresh were selected and the results showed that H003'had strong salt-alkali tolerance. The seedling emergence rate is high, which can be used as the main cultivar of pot experiment in this paper. The activity of superoxide dismutase (SOD) in sugarbeet leaves increased with the increase of saline-alkali stress, and the stress time increased first and then decreased. The plasma membrane permeability and the content of malondialdehyde (MDA) in the leaves of sugarbeet seedlings were in direct proportion to the increase of saline-alkali stress, which indicated that the content of organic matter in sugarbeet seedlings was peroxidation, and the accumulative accumulation of organic matter was significantly decreased by .4. A large number of pot experiments showed that the growth of sugarbeet seedlings was always under salt stress in the whole process of pot culture, but the salinization degree of potted soil decreased gradually with the development of growth. The results showed that the growth of sugarbeet seedlings was improved, especially the content of NaHCOC _ 3 decreased most obviously.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S566.3

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