Responses of cucumber plant to NH4+ and NO3- nutrition: The relative addition rate technique vs. cultivation at constant nitrogen concentration

被引：39

作者：

Roosta, Hamid R. ^{[1
]}

Sajjadinia, Abdoreza ^{[1
]}

Rahimi, Asghar ^{[2
]}

Schjoerring, Jan K. ^{[3
]}

机构：

[1] Vali e Asr Univ Rafsanjan, Fac Agr, Dept Hort, Rafsanjan, Iran

[2] Vali e Asr Univ Rafsanjan, Fac Agr, Dept Agron, Rafsanjan, Iran

[3] Univ Copenhagen, Fac Life Sci, Plant & Soil Sci Lab, DK-1871 Copenhagen, Denmark

来源：

SCIENTIA HORTICULTURAE | 2009年 / 121卷 / 04期

关键词：

Relative addition rate technique; Amino acid; Nitrate reductase; Glutamine synthetase; Cucumis sativus; GLUTAMINE-SYNTHETASE; AMMONIUM TOXICITY; POSTTRANSLATIONAL REGULATION; NITRATE ASSIMILATION; AMINO-ACIDS; METABOLISM; GROWTH; YIELD; FORM; EXPRESSION;

D O I：

10.1016/j.scienta.2009.03.004

中图分类号：

S6 [园艺];

学科分类号：

0902 ;

摘要：

Different N sources (NO3-, NH4+, or NH4NO3) at different relative addition rates (RAR) were supplied to cucumber (Cucumis sativus L.), a species sensitive to NH4+ toxicity. For comparison, cucumber plants were also grown at constant concentrations of 1 and 5 mM NH4+ or 5 mM NO3-. The fresh weight of NH4+-fed plants at RAR 0.15 and RAR 0.25 day(-1) was similar to that of NO3--fed plants, while at RAR 0.35 or RAR 0.45 day(-1) growth reduction occurred. When available as a constant concentration, NH4+ decreased plant growth at 5 mM. It is concluded that at low rates of N supply the relative addition rate technique can be used for growing Cucumber plants with NH4+ as sole N source Without deleterious effects. (c) 2009 Published by Elsevier B.V.

引用

页码：397 / 403

页数：7

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