Effect of salinity on the growth and nitrogen uptake by wheat seedlings
Effect of salinity on the growth and nitrogen uptake by wheat seedlings
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DOI：
10.1080/01904169709365295
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发表时间：
1997-01-01
影响因子：
2.1
通讯作者：
Cerda, A
中科院分区：
文献类型：
--
作者：
Botella, MA;Martinez, V;Cerda, A
盐条件影响高等植物的氮同化。研究了盐分和氮源对小麦生长和氮素吸收的影响，植物在受控条件下在生长室中生长。营养液含有4 mM N，以硝酸钙[Ca（NO（3））（2）]或硫酸铵[（NH（4））（2）SO（4）]或两者的混合物形式施用，盐度处理包括两种水平的氯化钠（NaCl）（1和60 mM）。盐度显着降低了地上部和根系的生长和N源的效果是依赖于施加的盐度处理。盐胁迫降低了硝态氮（NO3）和NO3+铵态氮（NH4）的净吸收速率，但对NH4的吸收影响不大。黑暗条件对NO（3）吸收的影响大于NH（4）吸收。小麦生长的最佳氮源是NO（3）和NH（4）的混合物，特别是在盐条件下或低光照时期。
Saline conditions affect nitrogen (N) assimilation of higher plants. To study the effect of salinity and N source on growth and N uptake in wheat (Triticum aestivum L.), plants were grown in a growth chamber under controlled conditions. The nutrient solution contained 4 mM N, applied as either calcium nitrate [Ca(NO(3))(2)] or ammonium sulfate [(NH(4))(2)SO(4)], or a mixture of both, and the salinity treatments consisted in two levels of sodium chloride (NaCl) (1 and 60 mM). Salinity significantly reduced shoot and root growth and the effect of the N source was dependent on which salinity treatment was applied. Salinity decreased the net uptake rate of nitrate (NO(3)) and NO(3)+ammonium (NH(4)), but had little effect on NH(4) uptake when this nutrient was applied alone. Dark conditions affected NO(3) uptake to a greater extent than NH(4) uptake. The best N source for wheat growth was a mixture of NO(3) and NH(4), especially under saline conditions or periods of low irradiance.