The effects of GA and ABA treatments on metabolite profile of germinating barley

Huang, Yuqing; Cai, Shengguan; Ye, Lingzhen; Hu, Hongliang; Li, Chengdao; Zhang, Guoping

doi:10.1016/j.foodchem.2015.07.090

Cited by 31 publications

(27 citation statements)

References 32 publications

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“…The increased degradation was leading to lower ABA levels already at the full maturity, when the grains are harvested. ABA is known to suppress germination and thereby shoot emergence in barley [50,51]. Our study showed that the elevated level of ABA caused by drought stress was degraded to a higher extent during the storage phase compared to non-stressed control plants.…”

Section: Discussionmentioning

confidence: 52%

Increase of DNA Methylation at the HvCKX2.1 Promoter by Terminal Drought Stress in Barley

Surdonja¹,

Eggert

Hajirezaei

et al. 2017

Epigenomes

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Terminal drought stress during grain filling is the major abiotic factor that limits crop yield in barley. The mother plant acclimates to the environment and perceives signals that result in a change of the physiological state within the grain and therefore affect the seed development and germination of the next generation. Small regulatory RNAs have been described to be involved in plant drought stress response by suppressing the respective target genes. Based on their origin and function, these small RNAs are classified as micro RNAs (miRNA), short interfering RNAs (siRNA) or heterochromatic small interfering RNA (hc-siRNA). In addition, 24mer sized hc-siRNAs are associated with RNA directed DNA methylation (RdDM) and transcriptional gene silencing (TGS). The analysis of hc-siRNA by small RNA sequencing in barley caryopses after imposition of terminal drought stress allowed the identification of stress specific 24mers. Based on the sequence homology of the siRNAs to the promoter region of CYTOKININ-OXIDASE 2.1 (HvCKX2.1), this putative target gene was selected for further investigation. Terminal drought stress leads to an increased level of DNA methylation at the HvCKX2.1 promoter and the seeds derived from drought stressed plants showed faster shoot emergence. Accumulation of cytokinin ribosides, which are the known substrates of cytokinin-oxidase, can explain the observed phenotype of faster shoot emergence from seeds of drought stressed mother plants. Analysis of transgenic plants with modulated levels of abscisic acid (ABA) in the grain confirmed the ABA/drought stress responsive ProHvCKX2.1 methylation and correlation with shoot emergence speed.

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Section: Discussionmentioning

confidence: 52%

Increase of DNA Methylation at the HvCKX2.1 Promoter by Terminal Drought Stress in Barley

Surdonja¹,

Eggert

Hajirezaei

et al. 2017

Epigenomes

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“…In this context, the application of phytoregulators to plant foods has been lately described to enhance the content of bioactive components, antioxidants among others. Some of the most used phytoregulators are the phytohormones abscisic acid (ABA) and methyl jasmonate (MJ) (Huang et al, 2016). ABA is rapidly accumulated in response to stress whereas MJ acts as a triggering molecule to stimulate the production of secondary metabolites.…”

Section: Introductionmentioning

confidence: 99%

Variations in fatty acid composition and antioxidant content in olive fruits as a result of the application of phytoregulators to the olive tree (Olea europaeaL.)

Blanch

Gómez-Jiménez

Castillo

2020

CyTA - Journal of Food

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A new procedure to minimize the degradation of fatty acids and polyphenols during the olive storage is here proposed. This procedure is based on pre-harvest treatments of Arbequina and Picual olive trees with methyl jasmonate and abscisic acid. As a result, total phenolic content increased in all treated Arbequina olives as compared with controls. In contrast to Arbequina, only abscisic acid resulted in total phenolic content increase in Picual olives. Regarding the antioxidant activity, neither of the phytoregulators was effective. Fatty acid composition was also affected by both of them in Arbequina and Picual. Saturated fatty acid decreased with both methyl jasmonate and abscisic acid whereas unsaturated fatty acids increased significantly in treated olives. Olives with higher antioxidant activity exhibited higher unsaturated/saturated fat ratio. The application of phytoregulators to olive tree can be interesting to the oil industry particularly when a delay in oil processing occurs and olives have to be stored.

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“…ABA is a phytohormone that is directly involved in response to stress (Nakashima & Yamaguchi-Shinozaki, 2013). There are reports in the literature that prove that ABA is successful in the production of tanshinones and phenolic acids (Yang et al, 2012), anthocyanins (Cui, Liang, Y. Liu, F. Liu, & Zhu, 2012) and other phenolics (Cantín, Fidelibus, & Crisosto, 2007;Huang et al, 2016) in derived plant foods.…”

Section: Introductionmentioning

confidence: 99%

Abscisic Acid Sprayed on Olive Tree (Olea europaea L.) Affects the Phenolic Composition of Olive Fruit Cultivars

Blanch¹,

Flores²,

Gómez-Jiménez³

et al. 2018

JAS

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The aim of this research was to study the effect of abscisic acid pre-harvest treatment on the phenolic composition of olive fruits. To that end we applied abscisic acid (i.e., 50 mg/L and 100 mg/L) on Arbequina and Picual olive trees. Two different days of harvesting (i.e., day 3 and 6 after treatment) were also included in the study. Although the results obtained depended on the cultivar and on the day of harvesting a general trend was established. The treatment with 50 mg/L of abscisic acid resulted in higher total phenol content but significant decrease in the DPPH activity. In contrast, olives treated with 100 mg/L abscisic acid resulted in higher total phenol content, DPPH activity and contents of oleuropein, hydroxytyrosol and phenolic acids as compared with controls. The best values of total phenol content and IC 50 were obtained for treated Picual olives (727.75 mg gallic kg -1 and 889.72 µg/ml, respectively) whereas the highest values of oleuropein and hydroxytyrosol were measured for treated Arbequina olives (508.94 and 559.67 mg kg -1 , respectively). Phenolic acid content was also higher in Picual olives treated with 100 mg/L of abscisic acid. Particulary, values ranged from 7.26 mg kg -1 for caffeic acid to 92.38 mg kg -1 for chlorogenic acid. Exogenous abscisic acid applied to olive trees is a promising agronomic practice to obtain olives enriched in antioxidants.

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The effects of GA and ABA treatments on metabolite profile of germinating barley

Cited by 31 publications

References 32 publications

Increase of DNA Methylation at the HvCKX2.1 Promoter by Terminal Drought Stress in Barley

Increase of DNA Methylation at the HvCKX2.1 Promoter by Terminal Drought Stress in Barley

Variations in fatty acid composition and antioxidant content in olive fruits as a result of the application of phytoregulators to the olive tree (Olea europaeaL.)

Abscisic Acid Sprayed on Olive Tree (Olea europaea L.) Affects the Phenolic Composition of Olive Fruit Cultivars

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