Short versus long term effects of cyanide on sugar metabolism and transport in dormant walnut kernels

Gerivani, Zahra; Vashaee, Elham; Sadeghipour, Hamid Reza; Aghdasi, Mahnaz; Shobbar, Zahra‐Sadat; Azimmohseni, Majid

doi:10.1016/j.plantsci.2016.07.016

Cited by 10 publications

(5 citation statements)

References 72 publications

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“…Although cyanide is a compound that inhibits the respiratory process, it is naturally formed in plants as the by product of ethylene biosynthesis and, at low concentrations, can bring beneficial effects, such as mobilization of sucrose and starch in breaking dormancy in seeds and stimulating germination (Molojwane et al, 2015;Gerivani et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Salinity tolerance in Senna macranthera (DC. ex Collad.) H. S. Irwin & Barneby seeds with sodium nitroprusside (SNP) promoted by cyanide

et al. 2018

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Studies show the positive effect of the nitric oxide donor in the seed germination process. However, there are no precise reports about which compound present in sodium nitroprusside would cause these effects in seeds under salt stress. The aim of this study was to evaluate the effects of SNP on germination of Senna macranthera seeds under salt stress. The osmotic potentials of -0.3, -0.4, and -0.5 MPa of NaCl were used, as well as the concentration of 100 μM of sodium nitroprusside, inactive sodium nitroprusside, and ferrocyanide. The sodium nitroprusside in germination was applied before, during, and after salt stress. Germination rate, germination speed index, percentage of normal seedlings, and seedling development components were evaluated. The treatments that proved to be more promising in recovery of germination under salt stress are -0.4 MPa together with SNP; -0.4 MPa together with inactive SNP; -0.5 MPa together with SNP and -0.5 MPa together with inactive SNP. Effects similar to those brought about by the sodium nitroprusside treatment were also observed in the treatments with inactive sodium nitroprusside and ferrocyanide, indicating that the effects observed were related to release of the cyanide present in the sodium nitroprusside.

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Section: Resultsmentioning

confidence: 99%

Salinity tolerance in Senna macranthera (DC. ex Collad.) H. S. Irwin & Barneby seeds with sodium nitroprusside (SNP) promoted by cyanide

et al. 2018

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“…However, although the alleviation of sunflower dormancy by cyanide is also dependent on ROS production and protein carbonylation (Oracz et al, 2007), it seems to be independent of ethylene production but needs the ethylene signaling pathway, suggesting that it is required for both ethylene and cyanide action (Oracz et al, 2008). Finally, sugar metabolism is increased by cyanide treatment in apple and walnut kernel embryos during cyanide-induced alleviation of dormancy (Gerivani et al, 2016;Siegien and Bogatek, 2006). The understanding of the crosstalk between cyanide and hormone signaling during germination is an open subject and requires further investigation.…”

Section: Hydrogen Cyanide Action and Signalingmentioning

confidence: 99%

Signaling by hydrogen sulfide and cyanide through post-translational modification

Gotor

García

Aroca

et al. 2019

Journal of Experimental Botany

129

104

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Two cysteine metabolism-related molecules, hydrogen sulfide and hydrogen cyanide, which are considered toxic, have now been considered as signaling molecules. Hydrogen sulfide is produced in chloroplasts through the activity of sulfite reductase and in the cytosol and mitochondria by the action of sulfide-generating enzymes, and regulates/affects essential plant processes such as plant adaptation, development, photosynthesis, autophagy, and stomatal movement, where interplay with other signaling molecules occurs. The mechanism of action of sulfide, which modifies protein cysteine thiols to form persulfides, is related to its chemical features. This post-translational modification, called persulfidation, could play a protective role for thiols against oxidative damage. Hydrogen cyanide is produced during the biosynthesis of ethylene and camalexin in non-cyanogenic plants, and is detoxified by the action of sulfur-related enzymes. Cyanide functions include the breaking of seed dormancy, modifying the plant responses to biotic stress, and inhibition of root hair elongation. The mode of action of cyanide is under investigation, although it has recently been demonstrated to perform post-translational modification of protein cysteine thiols to form thiocyanate, a process called S-cyanylation. Therefore, the signaling roles of sulfide and most probably of cyanide are performed through the modification of specific cysteine residues, altering protein functions.

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“…Paeonia are considered potential oil plants [23,24]. As an energy storage substance in seeds, lipids were thought to play an important role in the process of dormancy and germination in P. suffruticosa, Juglans regia, and Suaeda salsa by converting to sugars via glyoxylic acid metabolism or producing signal molecules related to dormancy release [25][26][27][28]. However, crude fat content did not significantly decrease under stratification in P. emodi, although the lipase activity increased.…”

Section: Discussionmentioning

confidence: 99%

Morphology and Physiology Response to Stratification during Seeds Epicotyl Dormancy Breaking of Paeonia emodi Wall. ex Royle

Wan

Zhang

Liu³

et al. 2022

Agronomy

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Paeonia emodi is a type of wild herbaceous peony with high ornamental and breeding value. Cold stratification is the only method to break its seed epicotyl dormancy to date, however, the key physiological factors during this process are not clear. In this study, rooted seeds of P. emodi were treated with 4 °C stratification, and the changes of the embryo, four nutrients, and two endogenous hormones in the seeds were investigated. The results showed that the plumule elongated at S6 (i.e., ten weeks of cold stratification), and grew to nearly the same length as the cotyledon at S9. Cold stratification increased starch consumption, significantly decreased soluble sugar content in the later stages, and decreased soluble protein content at S9, but it did not influence crude fat content. The activities of α-amylase and β-amylase increased significantly at S4 and S4 to S6, respectively. At S8 and S9, acid protease activity increased, and the increase in lipase activity continued throughout the whole process. At the same time, the ABA content decreased significantly after S6; from this stage, the ABA/GA3 ratio gradually decreased compared with that of the control, and the difference was significant at S9. Correlation analysis showed that the ABA/GA3 ratio was significantly correlated with starch content and α-amylase activity. It can be concluded that both carbohydrates and proteins were the energy supply for the epicotyl dormancy breaking of P. emodi seeds, rather than crude fat. Cold stratification promoted substance transformation by increasing the corresponding enzyme activities. The balance of ABA and GA3 suggested the key stage for the release of dormancy.

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Short versus long term effects of cyanide on sugar metabolism and transport in dormant walnut kernels

Cited by 10 publications

References 72 publications

Salinity tolerance in Senna macranthera (DC. ex Collad.) H. S. Irwin & Barneby seeds with sodium nitroprusside (SNP) promoted by cyanide

Salinity tolerance in Senna macranthera (DC. ex Collad.) H. S. Irwin & Barneby seeds with sodium nitroprusside (SNP) promoted by cyanide

Signaling by hydrogen sulfide and cyanide through post-translational modification

Morphology and Physiology Response to Stratification during Seeds Epicotyl Dormancy Breaking of Paeonia emodi Wall. ex Royle

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