[1]黄建凤,徐小梦,沈其荣,等.2个不结球白菜品种硝酸盐累积差异的生理机制[J].南京农业大学学报,2011,34(1):74-78.[doi:10.7685/j.issn.1000-2030.2011.01.014]
 HUANG Jian-feng,XU Xiao-meng,SHEN Qi-rong,et al.Physiological mechanisms for the difference of nitrate accumulation in two cultivars of non-heading Chinese cabbage[J].Journal of Nanjing Agricultural University,2011,34(1):74-78.[doi:10.7685/j.issn.1000-2030.2011.01.014]
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2个不结球白菜品种硝酸盐累积差异的生理机制()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
34卷
期数:
2011年1期
页码:
74-78
栏目:
出版日期:
2011-02-28

文章信息/Info

Title:
Physiological mechanisms for the difference of nitrate accumulation in two cultivars of non-heading Chinese cabbage
作者:
黄建凤徐小梦沈其荣尹晓明
南京农业大学资源与环境科学学院/江苏省固体有机废弃物资源化利用高技术研究重点实验室,江苏,南京,210095
Author(s):
HUANG Jian-feng XU Xiao-meng SHEN Qi-rong YIN Xiao-ming
College of Recourses and Environmental Sciences/Jiangsu Provincial Key Laboratory for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China
关键词:
不结球白菜 硝酸还原酶活性(NRA) 光合速率 硝酸盐累积
Keywords:
non-heading Chinese cabbage nitrate reductase activity(NRA) photosynthetic rate accumulation of nitrate
分类号:
S634.3
DOI:
10.7685/j.issn.1000-2030.2011.01.014
文献标志码:
A
摘要:
采用0.5、2.0、5.0 mmol.L-1NO3-3个浓度和3.75 mmol.L-1NO3-与1.25 mmol.L-1NH4+混合浓度,对2个不结球白菜品种上海青(低硝酸盐累积品种)和亮白叶1号(高硝酸盐累积品种)进行水培试验,研究了供氮水平对硝酸还原酶活性(NRA)、硝酸盐含量和光合速率的影响。结果表明:不结球白菜硝酸盐含量存在品种和器官差异(P<0.05)。亮白叶1号硝酸盐含量高于上海青,不同器官硝酸盐含量从高到低依次是:叶柄、叶片、根系,硝酸盐含量随外界供NO3-浓度的增加而增加,部分供NH4+降低了硝酸盐含量;上海青NRA高于亮白叶1号(P<0.05),不同器官NRA从高到低依次是:叶片、根系、叶柄,叶片和根系的NRA随外界NO3-浓度的增加而升高,部分供NH4+降低了不结球白菜NRA;在全NO3-处理下上海青叶片光合速率显著高于亮白叶1号(P<0.05),提高NO3-浓度可在一定程度上促进光合速率,部分供NH4+使光合速率有所降低。总之,上海青比亮白叶1号具有更高的NRA和光合速率,使其具有更强的NO3-还原同化能力,从而减少了NO3-在体内的积累。
Abstract:
Two cultivars of non-heading Chinese cabbage(Shanghaiqing, cultivar of lower nitrate content;Liangbaiye 1, cultivar of higher nitrate content)were hydroponically grown in four different nutrient solutions containing 0.5, 2.0, 5.0 mmol·L-1 NO3 and 3.75 mmol·L-1 NO3-mixing with 1.25 mmol·L-1 NH4+, respectively. Effects of N supplement on nitrate reductase activity(NRA), NO3-content and photosynthetic rate were studied. The results were listed as follows:NO3-content in Liangbaiye 1 was higher than that in Shanghaiqing and also showed significant differences between their organs(P<0.05). NO3-contents in organs were in the decreasing order of petiole, leaf blade and root. NO3-content increased with the increasing of NO3-concentrations outside. Proper enhancing NH4+ reduced NO3-content. Shanghaiqing got higher NRA than that of Liangbaiye 1 under all treatments(P<0.05). NRA in different organs was in the decreasing order of leaf blade, root and petiole. NRA of leaf blade and root increased with the increasing of NO3-concentrations outside, while reduced when NO3-was partially replaced by NH4+. Under the treatment of NO3-, photosynthetic rate in leaf blades of Shanghaiqing was significantly higher than that of Liangbaiye 1(P<0.05). Increase of NO3-concentrations outside promoted photosynthetic rate of leaf blades, while some supply of NH4+ reduced it. In general, Shanghaiqing had the higher NRA and photosynthetic rate compared with Liangbaiye 1, which was helpful for the reduction and assimilation of NO3

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备注/Memo

备注/Memo:
国家自然科学基金项目(30671234,30771290)
更新日期/Last Update: 2011-01-30