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Abscisic acid (ABA) is a phytohormone that plays an important role in responses to environmental stresses as well as seed maturation and germination. Intracellular signaling by ABA has been rigorously investigated in relation to stomatal guard-cell regulation, seed germination, and abiotic stress responses. However, intercellular regulation of ABA, including the molecular basis of ABA transport systems, has hardly been examined in any plant species. Based on genetic and biochemical analyses, we present evidence that one of the ATP-binding cassette (ABC) transporter genes, AtABCG25, encodes a protein that functions as an ABA exporter through the plasma membrane and is involved in the intercellular ABA signaling pathway. The ABC-type transporter is conserved in model species from E. coli to humans and is reported to transport various metabolites or signaling molecules in an ATP-dependent manner. At same time, another ABC transporter in Arabidopsis, AtABCG40, was independently reported to function as an ABA importer in plant cells. These findings strongly suggest the active control of ABA transport between plant cells, and they provide a novel impetus for examining ABA intercellular regulation.
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http://dx.doi.org/10.4161/psb.5.9.12566 | DOI Listing |
Plant Cell Rep
December 2024
Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Guangzhou, 510000, Guangdong, China.
A total of 24 genes of vacuolar H-translocating pyrophosphatases H-PPases (VPP) genes were identified in Saccharum spontaneum AP85-441 and the ScVPP1-overexpressed Arabidopsis plants conferred salt tolerance. The vital role of vacuolar H-translocating pyrophosphatases H-PPases (VPP) genes involved in plants in response to abiotic stresses. However, the understanding of VPP functions in sugarcane remained unclear.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
College of Horticulture, Hebei Agricultural University, Baoding, Hebei 071001, China; Research Center of Chinese Jujube, Hebei Agricultural University, Baoding, Hebei 071001, China. Electronic address:
Chinese jujube (Ziziphus jujuba Mill.) exhibits a remarkable resilience to both drought and salinity. Additionally, it is characterized by a high sugar content, with sucrose being the predominant component of its soluble sugars.
View Article and Find Full Text PDFFront Plant Sci
December 2024
Xinjiang Production and Construction Corps, Shihezi University, Shihezi, China.
KAR (Karrikin), a novel plant growth regulator, can be recognized specifically by plants and can activate resistance responses. MdKAI2 is the natural receptor of KARs in apple. Here, we report the identification of osmotic stress resistance in via the method of genetic transformation.
View Article and Find Full Text PDFBMC Plant Biol
December 2024
The Key Laboratory of Biotechnology for Medicinal and Edible Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, China.
Background: WRKY transcription factors are plant-specific and play essential roles in growth, development, and stress responses, including reactions to salt, drought, and cold. Despite their significance, the WRKY genes in the wild sweet potato ancestor, Ipomoea pes-caprae, remain unexplored.
Results: In this study, 65 WRKY genes were identified in the I.
Zhongguo Zhong Yao Za Zhi
September 2024
Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences Changchun 130112, China College of Pharmacy and Biological Engineering, Chengdu University Chengdu 610106, China.
To explore the difference in metabolism and transcription between seeds experiencing space flight and ground seeds after morphological post ripening, this study utilized ginseng seeds experiencing space flight and ground seeds as materials. Metabolomics and transcriptomics analyses were conducted using ultra-high performance liquid chromatography-mass spectrometry(UPLC-MS) and high-throughput transcriptome sequencing(RNA-seq) technologies, so as to identify differential terpenoid metabolites, differential endogenous hormones, and differentially expressed genes. The results showed that through metabolomics analysis, a total of 22 differential terpenoid metabolites were identified in the experimental and control groups, including chikusetsusaponin FK_7, ginsenoside F_2, ginseno-side K, majoroside R_1, ginsenoside Re_5, 12-hydroxyabietic acid, etc; through transcriptomics analysis, 15 differential terpenoid metabolism-related differentially expressed genes were identified in the experimental and control groups, including FCase, AACT, PMK, etc, and these genes were integrated into the pathway based on the MEP and MVA.
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