Dynamic Regulation of Nitrogen and Organic Acid Metabolism of Cherry Tomato Fruit as Affected by Different Nitrogen Forms

XU Xin-Juan; LI Qing-Yu; SONG Xiao-Hui; Shen Qi-Rong; Dong Cai-Xia

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Dynamic Regulation of Nitrogen and Organic Acid Metabolism of Cherry Tomato Fruit as Affected by Different Nitrogen Forms

机译：氮素形态对樱桃番茄果实氮和有机酸代谢的动态调节

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Cherry tomatoes (Lycopersicon esculentum Mill.,cv.hongyangli) were hydroponically cultivated in a greenhouse to determine the effect of different nitrogen (N) forms on organic acid concentration and the activities of related enzymes involved in nitrogen and organic acid metabolism during cherry tomato fruit development.The results showed that fruit nitrate reductase (NR) activity was much higher following treatment with 100％ NO-3 and 75％ NO-3 +25％ NH+4 than with 100％ NH+4 except at maturity.Glutamine synthetaee (GS) activity trended downward during fruit development under all three treatments.Plants fed 100％ NH4+ had the lowest fruit citrate and malate levels at maturity,with the highest malate concentration at an early stage.The activity of phosphoenolpyruvate carboxylase (PEPC) was found to be in accord with the malate concentration with every N source.Under all three N forms,the citrate synthase (CS) activity peaked one week before the citrate concentration.

机译：在温室中水培栽培樱桃番茄（Lycopersicon esculentum Mill。，cv.hongyangli），以确定樱桃番茄果实中不同氮（N）形态对有机酸浓度的影响以及参与氮和有机酸代谢的相关酶的活性。结果表明，用100％NO-3和75％NO-3 + 25％NH + 4处理后的果实硝酸还原酶（NR）活性要比用100％NH + 4处理的成熟度高得多。这三种处理在果实发育过程中的活性均呈下降趋势。饲喂100％NH4 +的植物成熟时的柠檬酸和苹果酸水平最低，早期苹果酸浓度最高。磷酸烯醇丙酮酸羧化酶（PEPC）的活性在所有三种氮形式下，柠檬酸合酶（CS）的活性在柠檬酸盐浓度前一周达到峰值。

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《土壤圈（英文版）》 |2012年第1期|67-78|共12页
作者
XU Xin-Juan; LI Qing-Yu; SONG Xiao-Hui; Shen Qi-Rong; Dong Cai-Xia;
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作者单位

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095(China);

Henan Institute of Science and Technology, Xinxiang 453003(China);

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095(China);

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095(China);

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095(China);

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095(China);

Henan Institute of Science and Technology, Xinxiang 453003(China);

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008(China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Dynamic Regulation of Nitrogen and Organic Acid Metabolism of Cherry Tomato Fruit as Affected by Different Nitrogen Forms

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