Exogenous γ-aminobutyric acid enhances heat tolerance of kiwifruit plants by protecting photosynthetic system and promoting heat shock proteins expression

Huo, Liuqing; Chen, Yunyun; Zhang, Yuman; Zhang, Hao; Wang, Hujing; Xu, Kai; Sun, Xuepeng

doi:10.1016/j.aoas.2023.12.003

Cited by 1 publication

(1 citation statement)

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“…For example, the amino acid γ-aminobutyric acid (GABA), whose content increases under high temperatures, modulates the expression of heat shock proteins (HSPs) and photosynthesis activity. This induces heat stress tolerance in Actinidia chinensis (kiwifruit) and Agrostis stolonifera (creeping bentgrass) [8][9][10]. Exogenous treatment with β-aminobutyric acid (BABA), an isomer of GABA, restores inhibited growth following heat stress in Arabidopsis thaliana (Arabidopsis) and Brassica rapa by upregulating abscisic acid-related genes and maintaining photosynthesis activity under high temperatures, respectively [11,12].…”

Section: Introductionmentioning

confidence: 99%

N-Acetylglutamic Acid Enhances Tolerance to Oxidative and Heat Stress in Humulus lupulus

Hirakawa,

Ohara

2024

Horticulturae

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Humulus lupulus (hop) is a necessary material in beer brewing because its female inflorescences (called hop cones) give a floral aroma, bitterness and foam stability to beer. Various aspects of growth conditions in the cultivation area, especially temperature, strongly affect the yield and quality of hop cones. Recent estimates suggest that climate change accompanied by global warming is negatively impacting hop production, with high temperatures reducing the expression of genes that regulate beneficial secondary metabolites in hops. This underscores the need for techniques to enhance hop tolerance to high temperatures. This study explores the potential of N-acectylglutamic acid (NAG), a non-proteinogenic amino acid, to confer hops with tolerance against oxidative and heat stress by suppressing ROS accumulation. Exogenous NAG treatment activated the expression of HlZAT10/12 and HlHSFA2, which are putative homologues considered master regulators in response to oxidative and heat stress in Arabidopsis thaliana (Arabidopsis). Additionally, histone acetylation, a histone modification associated with transcriptional activation, was increased at these stress-responsive genes in the NAG-treated hops. These findings reveal NAG as a potential chemical compound to mitigate hop production reduction caused by high temperatures and suggest the conservation of epigenetic modification-mediated regulation of gene expression in response to environmental stresses in hops.

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