Pacheco-Sangerman Fresia, Gómez-Merino Fernando Carlos, Peralta-Sánchez María Guadalupe, Trejo-Téllez Libia I
Programa de Edafología, Colegio de Postgraduados Campus Montecillo, Carretera México-Texcoco km 36.5, Montecillo C. P. 56264, Estado de México, Mexico.
Programa de Recursos Genéticos y Productividad-Fisiología Vegetal, Colegio de Postgraduados Campus Montecillo, Carretera México-Texcoco km 36.5, Montecillo C. P. 56264, Estado de México, Mexico.
Plants (Basel). 2024 May 13;13(10):1337. doi: 10.3390/plants13101337.
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 SO 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 SO, 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 SO 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 SO enhanced the contents of Cu and Mn, but also those of Na. Chlorophylls a, b, and total decreased as the concentration of SO increased in plants treated with 150 mM NaCl. With 75 mM NaCl, carotenoid concentration had a positive relationship with SO. Hence, the 4.25 mM SO 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 SO, regardless of NaCl. Similarly, this level of SO 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.
通过适当管理硫营养可以抵消盐胁迫的负面影响。在此，我们在营养液中施加3.50、4.25和5.00 mM的硫酸根离子（SO）来抵消甘蓝品种Royal中75和150 mM氯化钠诱导的盐胁迫。氯化钠浓度从75 mM增加到150 mM会降低地上部大量元素和微量元素的含量。当硫酸根离子浓度从3.50 mM增加到4.25 mM时，在两种氯化钠浓度下，地上部氮（N）、磷（P）、钾（K）、钙（Ca）、镁（Mg）和硫（S）的含量均有所增加。在75 mM氯化钠条件下，硫酸根离子浓度从3.50 mM增加到4.25 mM会提高铁（Fe）、锌（Zn）、锰（Mn）和钠（Na）的浓度。在150 mM氯化钠条件下，硫酸根离子浓度从3.50 mM增加到4.25 mM会提高铜（Cu）和锰的含量，同时也会提高钠的含量。在150 mM氯化钠处理的植株中，随着硫酸根离子浓度增加，叶绿素a、叶绿素b和叶绿素总量均下降。在75 mM氯化钠条件下，类胡萝卜素浓度与硫酸根离子呈正相关。因此，在75 mM氯化钠存在时，4.25 mM硫酸根离子浓度增加了大量元素和微量元素的含量，而在150 mM氯化钠条件下，它提高了除钾以外的大量元素的含量。当植株用5.00 mM硫酸根离子处理时，无论氯化钠浓度如何，叶绿素a/叶绿素b比值均接近3。同样，这种硫酸根离子水平增加了类胡萝卜素的浓度，这导致叶绿素总量/类胡萝卜素比值降低，表明对光合器官有保护作用。得出的结论是，在盐胁迫下，较高剂量的硫有利于养分积累并增加类胡萝卜素浓度。
