GABA Signal Mediating Phenolics Accumulation in Sprouts under Abiotic Stress

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 1687

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Guest Editor
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
Interests: phytochemicals accumulation; sprouts producing; seeds germination; gamma-aminobutyric acid metabolism and its signal function; phenolics accumulation; food chemistry; metabolomics
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Special Issue Information

Dear Colleagues,

Phenolic compounds are complex and diverse plant secondary metabolites which play important special roles in plant growth and development and adaption to the environment and resistance to abiotic stress. At the same time, phenolics have attracted extensive attention because of their antioxidant and anticancer effects on the human body. Therefore, scientific and technological workers have gradually carried out a lot of research on the structure, composition, properties, and functions of plant phenolics and used stress methods to treat germinating seeds or seedlings to synthesize more phenolics. Gamma-aminobutyric acid (GABA) is a 4-carbon non protein amino acid. It has been widely studied as an inhibitory neurotransmitter in mammals, and it also has the functions of lowering blood pressure and sedation in the human body. In plants, abiotic stress can enhance GABA synthesis. With the deepening of research, GABA as a signal molecule involved in the synthesis of plant secondary metabolites has been gradually confirmed. However, the receptor of GABA in plants has not been clarified. Not much is known about how GABA binding and interactions with proteins occur, how stress is translated into a signal that results in phenolics accumulation and changes physiological and biochemical metabolism, and whether the generated signal is transient or sustained, as well as the molecular basis of GABA regulation of transporters and acceptors that promote the growth of sprouts or seedlings under stress. Hence, this Special Issue will focus on the regulation, signal transduction, and mechanism of GABA in plant phenolic accumulation under abiotic stress.

Dr. Runqiang Yang
Guest Editor

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Keywords

  • abiotic stress
  • seeds
  • sprouts
  • germination
  • signal transition
  • phenolics accumulation
  • GABA metabolism

Published Papers (1 paper)

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Research

10 pages, 1133 KiB  
Article
Interaction of Gamma-Aminobutyric Acid and Ca2+ on Phenolic Compounds Bioaccumulation in Soybean Sprouts under NaCl Stress
by Chong Xie, Maomao Sun, Pei Wang and Runqiang Yang
Plants 2022, 11(24), 3503; https://doi.org/10.3390/plants11243503 - 13 Dec 2022
Cited by 2 | Viewed by 1186
Abstract
NaCl stress can enhance the accumulation of phenolic compounds in soybean during germination. In the present study, effects of gamma-aminobutyric acid (GABA) and Ca2+ on the biosynthesis of phenolic compounds in soybean sprouts germinated with NaCl stress were investigated. Results showed that [...] Read more.
NaCl stress can enhance the accumulation of phenolic compounds in soybean during germination. In the present study, effects of gamma-aminobutyric acid (GABA) and Ca2+ on the biosynthesis of phenolic compounds in soybean sprouts germinated with NaCl stress were investigated. Results showed that addition of Ca2+ increased the content of total phenolics, phenolic acids, and isoflavonoids in soybean sprouts by ca. 15%, 7%, and 48%, respectively, through enhancing the activities of three key enzymes involved in the biosynthesis. On the other hand, addition of LaCl3, a calcium channel blocker, inhibited the synthesis of phenolic compounds, indicating that Ca2+ plays an important role in the synthesis of these compounds in soybean sprouts. Addition of GABA can increase the content of Ca2+ in soybean sprouts by ca. 20% and alleviate the inhibition of LaCl3 on phenolics biosynthesis in soybean sprouts. Similarly, addition of Ca2+ can reverse the inhibition of 3-mercaptopropionate, an inhibitor of endogenous GABA synthesis, on the biosynthesis of phenolic compounds in soybean sprouts under NaCl stress. To conclude, both GABA and Ca2+ can enhance the biosynthesis of phenolic compounds in soybean sprouts and there was an interaction between their effects on the promotion of phenolic compounds biosynthesis. Full article
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