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CO2濃度升高對大豆糖代謝和脂肪代謝影響的研究

來源：泰然健康網(wǎng) 時間：2025年11月17日 11:34

摘　要：為明確大氣CO2濃度升高對大豆糖代謝和脂肪代謝的影響，本研究以高油大豆品種“晉大70”為材料，利用控制氣室設(shè)置CK（CO2濃度為400 μmol/mol）和EC（CO2濃度為600 μmol/mol）兩個處理，大豆整個生育期均在控制氣室內(nèi)，在大豆鼓粒期利用便攜式氣體交換系統(tǒng)LI-6400測定光合參數(shù)，測定葉綠素含量、糖代謝和脂肪代謝相關(guān)指標(biāo)，并在收獲期測定產(chǎn)量指標(biāo)。結(jié)果表明：CO2濃度升高顯著提高葉綠素a、葉綠素b和總?cè)~綠素含量，使大豆凈光合速率和水分利用效率顯著提高59.7%和63.2%；葉片中的蔗糖磷酸合成酶和異檸檬酸裂解酶活性在高CO2濃度下顯著升高28.8%和215.0%，琥珀酸脫氫酶活性、乙酰輔酶A羧化酶和二?；视王；D(zhuǎn)移酶活性顯著降低；CO2濃度升高使籽粒中可溶性糖含量、蔗糖含量、蔗糖合成酶和異檸檬酸裂解酶活性顯著下降，但顯著增加異檸檬酸脫氫酶（248.2%）、琥珀酸脫氫酶（75.0%）、乙酰輔酶A羧化酶活性（15.8%）；大豆的單株粒重、單株莢數(shù)和百粒重在CO2濃度升高條件下顯著升高25.6%、23.4%和21.1%。研究表明，在高CO2濃度下，大豆鼓粒期葉片蔗糖代謝和磷酸戊糖途徑代謝加強(qiáng)，三羧酸循環(huán)和脂肪代謝減弱，籽粒中蔗糖代謝減弱，磷酸戊糖途徑、三羧酸循環(huán)和脂肪代謝加強(qiáng)。本研究結(jié)果將有助于了解CO2濃度升高條件下對大豆糖代謝和脂代謝的影響，為未來氣候變化背景下大豆生產(chǎn)與管理提供理論依據(jù)。
關(guān)鍵詞：CO2濃度；大豆；蔗糖代謝；三羧酸循環(huán)；脂肪代謝
中圖分類號：S529 文獻(xiàn)標(biāo)志碼：ADOI：10.3969/j.issn.1007-7146.2022.01.010

Abstract

Abstract: To investigate the effects of elevated CO2 concentration on sugar metabolism and fat metabolism of soybean. The high-oil soybean variety“Jinda-70”was used as material, and two treatments were set up in a controlled chamber: CK (CO2 concentration 400 μmol/mol) and EC (CO2 concentration 600 μmol/mol). The whole growth period of soybean was in the controlled gas chamber. The portable gas exchange system Li-6400 was used to measure the indexes of the photosynthetic parameters, chlorophyll content, glucose metabolism and fat metabolism at the bulking stage, and the yield indexes at the harvest stage were also measured. The results showed that the contents of chlorophyll a, chlorophyll b and total chlorophyll were significantly increased by increasing CO2 concentration, and the net photosynthetic rate and water usage efficiency of soybean also significantly increased by 59.7% and 63.2%. The activities of sucrose phosphate synthase and isocitrate lyase in leaves significantly increased by 28.8% and 215.0% under high CO2 concentration, while the activities of succinate dehydrogenase, acetyl-CoA carboxylase, and diacylglycerol acyltransferase significantly decreased. With the increase of CO2 concentration, soluble sugar content, sucrose content, sucrose synthase and isocitrate lyase activities were significantly decreased, while the activities of isocitrate dehydrogenase, succinic dehydrogenase and acetyl-CoA carboxylase were significantly increased by 248.2%, 75.0% and 15.8%. In addition, the seed weight per plant, pod number per plant, and 100-seed weight of soybean significantly increased by 25.6%、23.4% and 21.1% under increased CO2 concentration. In soybean leaf, sucrose metabolism and pentose phosphate pathway were strengthened, whereas tricarboxylic acid cycle and fat metabolism were weakened at seed filling stage in soybean. In soybean seed, pentose phosphate pathway, tricarboxylic acid cycle and fat metabolism were strengthened along with weakened sucrose metabolism. The results will help to understand the effects of elevated CO2 concentration on sugar metabolism and lipid metabolism in soybean, and provide theoretical basis for the production and management in soybean under climate change scenarios in the future.
Key words: CO2 concentration; soybean; sucrose metabolism; tricarboxylic acid cycle; fat metabolism
（Acta Laser Biology Sinica, 2022, 31(1): 070-078）

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導(dǎo)出引用

張小琴，郝興宇，宗毓錚，張東升，史鑫蕊，李　萍.CO2濃度升高對大豆糖代謝和脂肪代謝影響的研究[J]. 激光生物學(xué)報. 2022, 31(1): 70-78

ZHANG Xiaoqin, HAO Xingyu, ZONG Yuzheng, ZHANG Dongsheng, SHI Xinrui, LI Ping.Effects of Elevated CO2 Concentration on Sugar Metabolism and Fat Metabolism in Soybean[J]. Acta Laser Biology Sinica. 2022, 31(1): 70-78

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