NDLI: Effects of hematin and carbon monoxide on the salinity stress responses of Cassia obtusifolia L. seeds and seedlings

Content Provider	Springer Nature Link
Author	Zhang, Chunping Li, Yicun Yuan, Fenggang Hu, Shijun He, Ping
Copyright Year	2012
Abstract	The purpose of the present study was to investigate the mechanism of carbon monoxide (CO) and hematin in alleviating the inhibition of Cassia obtusifolia seeds and seedlings. NaCl (100 mM) was used to mimic salinity stress in a series of experiments.Varying combinations of CO in a saturated aqueous solution and hematin (1.0 μM) were added to seeds and seedlings under salinity stress. Seed germination indices and seedling parameters were investigated.Seed germination and seedling growth were significantly inhibited under salinity stress. NaCl-induced inhibitory effects on seed germination and seedling growth were ameliorated by hematin or the CO aqueous solution. Addition of 1.0 μM hematin or 5 % CO-saturated aqueous solution to seeds and seedlings significantly alleviated damage to the plant cells under salinity stress. Hematin and the CO aqueous solution enhanced chlorophyll concentration, total soluble sugars, free proline, and soluble protein, and improved photosystem II (PSII) photochemical efficiency levels, PSII actual photochemical efficiency, and the photochemical quench coefficient. In contrast, the non-photochemical quenching coefficient decreased. Hematin and the CO aqueous solution also enhanced the activities of superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, and glutathione reductase, thus alleviating oxidative damage, as indicated by decreases in hiobarbituric acid reactive substances, hydrogen peroxide concentration, relative conductivity, and lipoxygenase activity. Heme oxygenase (HO) activity was increased by hematin treatment. Hematin may contribute to endogenous HO-derived CO, since the addition of zinc protoporphyrin IX or hemoglobin reversed the protective effects conferred by hematin specified above.Based on the experimental results, we conclude that hematin and CO induce advantageous effects on the attenuation of salt-stress inhibition of C. obtusifolia seeds and seedlings and alleviate oxidative damage by conferring beneficial cytoprotection and activating anti-oxidant enzymes.
Starting Page	85
Ending Page	105
Page Count	21
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	359
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-03-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon monoxide Hematin Heme oxygenase Salinity stress Seed germination Cassia obtusifolia L. Plant Sciences Ecology Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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