Salicylic acid provides resistance to cadmium toxicity and drought stress in Salix matsudana Koidz.

IF 1.6 3区环境科学与生态学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY

Chemoecology Pub Date : 2024-12-05 DOI:10.1007/s00049-024-00415-4

Xuejie Li, Long Guo, Tao Sun, Kaiyuan Yu, Jiaxin Zhang, Yanan Ruan

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引用次数: 0

Abstract

Cadmium (Cd) toxicity and drought stress are cumulatively disruptive to physiological processes in plants. Salicylic acid (SA) has modulatory roles in osmotic balance in plants. Proline, can act as a compatible solute in osmotic adjustment, elevate antioxidative defense system, which improve adversity tolerance in plants. However, how SA regulates proline metabolism under Cd and drought stresses to improve plant tolerance remains largely unknown. To uncover the alleviation mechanism of SA on Salix matsudana Koidz. seedings to Cd and drought stresses, the non-enzymatic/enzymatic antioxidants, proline metabolism, and related enzyme genes were assayed in S. matsudana. This was done under application of Cd (50 µmol·L^− 1) and polyethylene glycol (PEG) (at concentrations of 5% (w/v)) to induce drought stress in 1/4 Hoagland solution with the application of SA (50 µmol·L^− 1). The results showed that Cd and drought stresses triggered over-accumulation of reactive oxygen species (ROS), and significantly inhibited the growth traits of S. matsudana seedings. Additionally, the combined Cd and drought stresses caused inhibition in root length and plant height. However, SA increased proline accumulation by increasing the activities of ornithine aminotransferase (OAT) and inhibiting the activity of proline dehydrogenase (ProDH), thereby promoting the generation of glutathione (GSH) and ascorbic acid (AsA), and the activities of antioxidative enzymes while also reducing oxidative stress and restoring the growth parameters in Cd and drought-treated S. matsudana. Among the non-enzymatic/enzymatic antioxidative systems, GSH plays a key role in the scavenging of ROS. Accordingly, proline has a vital multifunctional role in exogenous SA-induced Cd and drought stress tolerance.

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来源期刊

Chemoecology 环境科学-生化与分子生物学

CiteScore

4.20

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： It is the aim of Chemoecology to promote and stimulate basic science in the field of chemical ecology by publishing research papers that integrate evolution and/or ecology and chemistry in an attempt to increase our understanding of the biological significance of natural products. Its scopes cover the evolutionary biology, mechanisms and chemistry of biotic interactions and the evolution and synthesis of the underlying natural products. Manuscripts on the evolution and ecology of trophic relationships, intra- and interspecific communication, competition, and other kinds of chemical communication in all types of organismic interactions will be considered suitable for publication. Ecological studies of trophic interactions will be considered also if they are based on the information of the transmission of natural products (e.g. fatty acids) through the food-chain. Chemoecology further publishes papers that relate to the evolution and ecology of interactions mediated by non-volatile compounds (e.g. adhesive secretions). Mechanistic approaches may include the identification, biosynthesis and metabolism of substances that carry information and the elucidation of receptor- and transduction systems using physiological, biochemical and molecular techniques. Papers describing the structure and functional morphology of organs involved in chemical communication will also be considered.