Nkomo Mbukeni, Badiwe Mihlali, Niekerk Lee-Ann, Gokul Arun, Keyster Marshal, Klein Ashwil
Plant Biotechnology Laboratory, Department of Agriculture, University of Zululand, Main Road, Kwadlagezwe 3886, South Africa.
Plant Omics Laboratory, Department of Biotechnology, Life Science Building, University of the Western Cape, Robert Sobukwe Road, Bellville 7530, South Africa.
Plants (Basel). 2024 Jun 5;13(11):1564. doi: 10.3390/plants13111564.
-Coumaric acid (-CA) is a phenolic compound that plays a crucial role in mediating multiple signaling pathways. It serves as a defense strategy against plant wounding and is also presumed to play a role in plant development and lignin biosynthesis. This study aimed to investigate the physiological and ionomic effect of -CA on chia seedlings under salt stress. To this end, chia seedlings were supplemented with Nitrosol containing 100 μM of -CA, 100 of mM NaCI, and their combined (100 mM NaCI + 100 μM -CA) solutions in 2-day intervals for a period of 14 days along with a control containing Nitrosol only. The treatment of chia seedlings with 100 mM of NaCI decreased their growth parameters and the content of the majority of the essential macro-elements (K, P, Ca, and Mg), except for that of sodium (Na). The simultaneous application of -CA and a salt stress treatment (-CA + NaCI) alleviated the effect of salt stress on chia seedlings' shoots, and this was indicated by the increase in chia biomass. Furthermore, this combined treatment significantly enhanced the levels of the essential microelements Mg and Ca. In summary, this brief report is built on the foundational work of our previous study, which demonstrated that -CA promotes growth in chia seedlings via activation of O. In this brief report, we further show that -CA not only promotes growth but also mitigates the effects of salt stress on chia seedlings. This mitigation effect may result from the presence of Mg and Ca, which are vital nutrients involved in regulating metabolic pathways, enzyme activity, and amino acid synthesis.
香豆酸（-CA）是一种酚类化合物，在介导多种信号通路中起关键作用。它是植物抵御创伤的一种防御策略，也被认为在植物发育和木质素生物合成中发挥作用。本研究旨在探讨盐胁迫下 -CA 对奇亚籽幼苗的生理和离子组学影响。为此，每隔 2 天给奇亚籽幼苗补充含 100 μM -CA、100 mM NaCl 及其组合（100 mM NaCl + 100 μM -CA）的亚硝酸盐溶液，持续 14 天，同时设置仅含亚硝酸盐的对照。用 100 mM NaCl 处理奇亚籽幼苗会降低其生长参数以及除钠（Na）之外的大多数必需大量元素（钾、磷、钙和镁）的含量。-CA 与盐胁迫处理（-CA + NaCl）同时应用减轻了盐胁迫对奇亚籽幼苗地上部分的影响，奇亚生物量增加表明了这一点。此外，这种联合处理显著提高了必需微量元素镁和钙的水平。总之，这份简短报告基于我们之前研究的基础工作，之前的研究表明 -CA 通过激活 O 促进奇亚籽幼苗生长。在这份简短报告中，我们进一步表明 -CA 不仅促进生长，还减轻了盐胁迫对奇亚籽幼苗的影响。这种减轻作用可能源于镁和钙的存在，它们是调节代谢途径、酶活性和氨基酸合成的重要营养素。
