Physiological and Biochemical Effects of Ultra‐Dry Storage on Barbados Nut Seeds

Cui, Kai; Wang, Haiying; Li, Kun; Liao, Shengxi; Li, Li; Zhang, Chunhua

doi:10.2135/cropsci2013.10.0680

Cited by 12 publications

(8 citation statements)

References 40 publications

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“…MDA content was positively correlated with fat oxidation [38], and was used as the candidate indicator for seed vigor evaluation. It was proposed that Spd played a key role in ROS scavenging by protected cell membrane stability and maintained organelle integrity under stress conditions [39].…”

Section: Discussionmentioning

confidence: 99%

Spermidine Induces Expression of Stress Associated Proteins (SAPs) Genes and Protects Rice Seed from Heat Stress-Induced Damage during Grain-Filling

Chen

Mou

et al. 2021

Antioxidants

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Heat stress during seed maturation significantly reduced seed size and quality. Polyamines, especially spermidine (Spd), were reported to be closely related to seed development and plant heat tolerance. Stress-associated proteins (SAPs) also played a critical role in plant heat resistance, but the relationship between Spd and SAPs in improving rice tolerance to heat stress during grain filling has not been reported. Our results showed that the external spraying Spd (1.5 mM) significantly increased seed germination rate, germination index, vigor index and 1000-grain weight, significantly increased endogenous Spd, spermine (Spm) content and peroxidase activity; significantly reduced MDA content; and greatly alleviated the impact of heat stress on rice seed quality during grain filling stage as compared with high temperature control. OsSAP5 was the most upregulated expression induced by Spd, and may be mainly involved in the Spd-mediated enhancement of high-temperature resistance during rice seed development. Overexpression of OsSAP5 in Arabidopsis enhanced 1000-grain weight and seed heat resistance. Exogenous Spd alleviated the survival rate and seedling length, reduced MDA content, and upregulated the expression levels of SPDS and SPMS in Atsap4 mutant under high temperature during seed germination. In all, exogenous Spd alleviated the heat damage on seed quality during the grain filling stage and seed germination stage by improving endogenous Spd and Spm. OsSAP5, a key gene induced by Spd, might be involved in the rice heat resistance and seed quality in coordination with Spd and Spm.

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Section: Discussionmentioning

confidence: 99%

Spermidine Induces Expression of Stress Associated Proteins (SAPs) Genes and Protects Rice Seed from Heat Stress-Induced Damage during Grain-Filling

Chen

Mou

et al. 2021

Antioxidants

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“…POD activity was positively correlated with the seed vigor index, while MDA content was negatively correlated with the seed vigor index [30], which could be used as the candidate indexes for seed vigor evaluation. It was proposed that Spd could protect biofilms and macromolecules and maintain organelle integrity under stress conditions [31].…”

Section: Discussionmentioning

confidence: 99%

Spermidine Enhances Heat Tolerance of Rice Seeds by Modulating Endogenous Starch and Polyamine Metabolism

Dong

et al. 2019

Molecules

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Polyamines have been reported to be involved in grain filling and they might contribute to the construction of heat resistance of some cereals. In this study, the hybrid rice ‘YLY 689’ was used to explore the possible effects of exogenous spermidine (Spd) on seed quality under high temperature during the filling stage. Rice spikes were treated with Spd or its synthesis inhibitor cyclohexylamine (CHA) after pollination, and then the rice plants were transferred to 40 °C for 5-day heat treatment. The results showed that, compared with the control under high temperature, Spd pretreatment significantly improved the germination percentage, germination index, vigor index, seedling shoot height, and dry weight of seeds harvested at 35 days after pollination, while the CHA significantly decreased the seed germination and seedling growth. Meanwhile, Spd significantly increased the peroxidase (POD) activity and decreased the malondialdehyde (MDA) content in seeds. In addition, after spraying with Spd, the endogenous content of spermidine and spermine and the expression of their synthetic genes, spermidine synthase (SPDSYN) and spermine synthase (SPMS1 and SPMS2), significantly increased, whereas the accumulation of amylose and total starch and the expression of their related synthase genes, soluble starch synthase II-3 (SS II-3) and granules bound starch synthase I (GBSSI), also increased to some extent. The data suggests that exogenous Spd pretreatment could alleviate the negative impacts of high temperature stress on rice seed grain filling and improve the rice seed quality to some extent, which might be partly caused by up-regulating endogenous polyamines and starch metabolism.

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“…The level of lipid peroxidation caused by free radicals can be assessed by determining the concentration of thiobarbituric acid reactive substances (TBARS) such as malondialdehyde (MDA) [28]. Disruptions in lipid membranes affect their structure, increasing permeability [29] and causing electrolyte leakage, which is associated with viability loss [28,30]. Additionally, ultradry storage can strengthen the effect of oxidation by the dehydration of water film and exposure of molecule biofilms to free radicals present in the cell [31].…”

Section: Introductionmentioning

confidence: 99%

Oxidation processes related to seed storage and seedling growth of Malus sylvestris, Prunus avium and Prunus padus

et al. 2020

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Seeds stored in controlled conditions in gene banks, faster or slower lose their viability. The effects of seed moisture content levels (ca. 5, 8, 11%) combined with storage temperatures (-3˚,-18˚,-196˚C) were investigated in terms of the description of seeds defined as orthodox under oxidative stress after seed storage, during germination, and initial seedling growth. Hydrogen peroxide (H 2 O 2), thiobarbituric acid reactive substances (TBARS) and ascorbate (Asc) were analyzed in relation to seed germinability and seedlings emergence in three species: Malus sylvestris L., Prunus avium L. and Prunus padus L. The effect of seed storage conditions on H 2 O 2 levels appeared in germinated seeds after the third year of storage in each species. The H 2 O 2 levels were negatively correlated with the germination and seedling emergence of P. avium seeds after three years of storage under all examined combinations. The emergence of P. padus seedlings was not linked to any of the stress markers tested. The P. padus seed biochemical traits were least altered by storage conditions, and the seeds produced tolerant seedlings of relatively high levels of H 2 O 2 and TBARS. To cope with different H 2 O 2 levels, TBARS levels, and Asc levels in seeds of three species varying storage conditions different molecular responses, i.e. repairing mechanisms, were applied during stratification to compensate for the storage conditions and, as a result, seeds remained viable and seedlings were successfully established.

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Physiological and Biochemical Effects of Ultra‐Dry Storage on Barbados Nut Seeds

Cited by 12 publications

References 40 publications

Spermidine Induces Expression of Stress Associated Proteins (SAPs) Genes and Protects Rice Seed from Heat Stress-Induced Damage during Grain-Filling

Spermidine Induces Expression of Stress Associated Proteins (SAPs) Genes and Protects Rice Seed from Heat Stress-Induced Damage during Grain-Filling

Spermidine Enhances Heat Tolerance of Rice Seeds by Modulating Endogenous Starch and Polyamine Metabolism

Oxidation processes related to seed storage and seedling growth of Malus sylvestris, Prunus avium and Prunus padus

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