Effect of exogenous carbon monoxide donor hematin on seed germination and physiological characteristics of Cassia obtusifolia seedlings under NaCl stress

Zhang, Chunping; Ping, He; Liu, Haiying; Yuan, Fenggang; Wei, Pinxiang; Xie, Yongdong; Hu, Shijun

doi:10.4268/cjcmm20120214

Cited by 1 publication

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“…Since plants' innate stress defense systems are not enough to provide sufficient protection in the face of severe stress conditions, the exogenous application of dynamic gaseous molecules like hydrogen sulfide (H 2 S), nitric oxide (NO), and carbon monoxide (CO) has been shown to play a significant role in enhancing plant resistance [15][16][17]. Among these molecules, NO is a ubiquitous gaseous signaling molecule that has broad-ranging physiological functions from seed germination to senescence.…”

Section: Introductionmentioning

confidence: 99%

Metabolomics and Physiological Changes Underlying Increased Tolerance to Salt Stress Induced by Applied Nitric Oxide in Fatsia japonica Seedlings

Hu,

Zhang,

Liu

et al. 2024

Forests

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Fatsia japonica (Thunb.) Decne. et Planch. is an important woody landscape plant, and its distribution is commonly limited by salt stress. Although the application of exogenous nitric oxide (NO) has been known to be effective in alleviating abiotic stress in plants, the underlying mechanism by which NO induces salt resistance in F. japonica remains unknown. In this study, the physiological and metabolic characteristics of F. japonica seedlings with the application of NO under salt stress conditions were investigated. We demonstrated that exogenous NO (0.1 mM sodium nitroprusside, SNP) mitigated the growth inhibition caused by 0.4% NaCl. This alleviation could be attributed to NO-induced enhancement in photosynthesis, osmotic adjustment, antioxidant enzyme activities, and a reduction in oxidative damage when exposed to salt stress. Furthermore, the metabolomic analysis revealed that salt stress significantly disrupts the growth of F. japonica by downregulating sugars, sugar alcohols, amino acids, and organic acids. However, the application of exogenous NO improves sugar metabolism, enhancing the levels of fructose, glucose, mannose, galactose, xylose, ribose, inositol, and sorbitol, as well as the metabolism of amino acids and organic acids. These findings provide new insights into the physiological and metabolic homeostasis adjustments induced by NO that promote salt stress tolerance in F. japonica, enhancing our understanding of plant resilience mechanisms.

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Section: Introductionmentioning

confidence: 99%