PDF(Pubmed)
Abstract：
Negative effects of salt stress may be counteracted by adequate management of sulfated nutrition. Herein, we applied 3.50, 4.25, and 5.00 mM SO42- in a nutrient solution to counteract salt stress induced by 75 and 150 mM NaCl in cabbage cv. Royal. The increase in NaCl concentration from 75 to 150 mM reduced the contents of macronutrients and micronutrients in the shoot. When increasing from 3.50 to 4.25 mM SO42-, the contents of nitrogen (N), phosphorous (P), potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S) in shoots were enhanced, at both concentrations of NaCl. Increasing from 3.50 to 4.25 mM SO42- enhanced iron (Fe), zinc (Zn), manganese (Mn), and sodium (Na) concentrations with 75 mM NaCl. With 150 mM NaCl, the increase from 3.50 to 4.25 mM SO42- enhanced the contents of Cu and Mn, but also those of Na. Chlorophylls a, b, and total decreased as the concentration of SO42- increased in plants treated with 150 mM NaCl. With 75 mM NaCl, carotenoid concentration had a positive relationship with SO42-. Hence, the 4.25 mM SO42- concentration increased the contents of macronutrients and micronutrients in the presence of 75 mM NaCl, while, with 150 mM NaCl, it improved the contents of macronutrients except K. The chlorophyll a/chlorophyll b ratio remained close to 3 when the plants were treated with 5.00 mM SO42-, regardless of NaCl. Similarly, this level of SO42- increased the concentration of carotenoids, which translated into reductions in the total chlorophyll/carotenoid ratios, indicating a protective effect of the photosynthetic apparatus. It is concluded that higher doses of sulfur favor the accumulation of nutrients and increase the concentration of carotenoids under salt stress.
摘要：
盐胁迫的负面影响可以通过适当管理硫酸营养来抵消。在这里，我们在营养液中应用了3.50、4.25和5.00mMSO42-，以抵消白菜cv中75和150mMNaCl引起的盐胁迫。皇家。NaCl浓度从75mM增加到150mM降低了芽中大量营养素和微量营养素的含量。当从3.50增加到4.25mMSO42-时，氮（N）的含量，磷(P),钾（K），钙(Ca),镁(Mg),芽中的硫(S)得到增强，在两种浓度的NaCl。从3.50增加到4.25mMSO42-增强铁（Fe），锌(Zn),锰(Mn),和钠(Na)浓度与75mMNaCl。使用150mMNaCl,从3.50到4.25mMSO42-的增加增加了Cu和Mn的含量，还有Na的那些。叶绿素a，B,在用150mMNaCl处理的植物中，随着SO42-浓度的增加，总量下降。75mMNaCl，类胡萝卜素浓度与SO42-呈正相关。因此，在75mMNaCl存在下，4.25mMSO42-浓度增加了大量营养素和微量营养素的含量，while,与150mMNaCl，除K外，它提高了大量营养素的含量。当植物用5.00mMSO42-处理时，叶绿素a/叶绿素b比率保持接近3，不管NaCl同样，这种水平的SO42-增加了类胡萝卜素的浓度，这转化为总叶绿素/类胡萝卜素比率的降低，表明光合装置的保护作用。结论在盐胁迫下，较高剂量的硫有利于营养物质的积累，并增加类胡萝卜素的浓度。
