Membrane Dynamics and Multiple Functions of Oil Bodies in Seeds and Leaves

Shimada, Takashi; Hayashi, Makoto; Hara‐Nishimura, Ikuko

doi:10.1104/pp.17.01522

Cited by 80 publications

(55 citation statements)

References 78 publications

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“…By contrast, AzA and 2-HOT are more specific for defending biotic stresses. While 2-HOT (from 18:3 of TAG) is an antifungal compound [see review (Shimada et al, 2018)], AzA (from C18 UFAs of galactolipids) is an inducer of systemic acquired resistance (SAR) against secondary pathogen infection by promoting G3P biosynthesis [see review (Lim et al, 2017)].…”

Section: Precursors Of Various Bioactive Moleculesmentioning

confidence: 99%

Plant Unsaturated Fatty Acids: Multiple Roles in Stress Response

2020

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Land plants are exposed to not only biotic stresses such as pathogen infection and herbivore wounding, but abiotic stresses such as cold, heat, drought, and salt. Elaborate strategies have been developed to avoid or abide the adverse effects, with unsaturated fatty acids (UFAs) emerging as general defenders. In higher plants, the most common UFAs are three 18-carbon species, namely, oleic (18:1), linoleic (18:2), and a-linolenic (18:3) acids. These simple compounds act as ingredients and modulators of cellular membranes in glycerolipids, reserve of carbon and energy in triacylglycerol, stocks of extracellular barrier constituents (e.g., cutin and suberin), precursors of various bioactive molecules (e.g., jasmonates and nitroalkenes), and regulators of stress signaling. Nevertheless, they are also potential inducers of oxidative stress. In this review, we will present an overview of these roles and then shed light on genetic engineering of FA synthetic genes for improving plant/crop stress tolerance.

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Section: Precursors Of Various Bioactive Moleculesmentioning

confidence: 99%

Plant Unsaturated Fatty Acids: Multiple Roles in Stress Response

2020

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“…In recent years, the terms OB or LD have been adopted by most laboratories. OBs are present in seeds, leaves, pollens, fruits, flowers, and roots of higher plants (angiosperms), the vegetative and reproductive organs of lower plants, the glands and adipose tissues of mammals, as well as in algae, fungi, nematodes, and bacteria (Huang, 2013;Shimada et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

New Insights Into the Role of Seed Oil Body Proteins in Metabolism and Plant Development

Shao

Liu

et al. 2019

Front. Plant Sci.

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Oil bodies (OBs) are ubiquitous dynamic organelles found in plant seeds. They have attracted increasing attention recently because of their important roles in plant physiology. First, the neutral lipids stored within these organelles serve as an initial, essential source of energy and carbon for seed germination and post-germinative growth of the seedlings. Secondly, they are involved in many other cellular processes such as stress responses, lipid metabolism, organ development, and hormone signaling. The biological functions of seed OBs are dependent on structural proteins, principally oleosins, caleosins, and steroleosins, which are embedded in the OB phospholipid monolayer. Oleosin and caleosin proteins are specific to plants and mainly act as OB structural proteins and are important for the biogenesis, stability, and dynamics of the organelle; whereas steroleosin proteins are also present in mammals and play an important role in steroid hormone metabolism and signaling. Significant progress using new genetic, biochemical, and imaging technologies has uncovered the roles of these proteins. Here, we review recent work on the structural or metabolic roles of these proteins in OB biogenesis, stabilization and degradation, lipid homeostasis and mobilization, hormone signal transduction, stress defenses, and various aspects of plant growth and development.

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“…In plants, certain stress conditions have most commonly been linked with TG accumulation, as shown for heat stress, oxidative stress, and prolonged darkness (Higashi, Okazaki, Myouga, Shinozaki, & Saito, ; Fan, Yu, & Xu, ). Physiological functions of stress‐accumulated TG indicate their importance in storage of chemical energy and materials for membrane lipid biosynthesis and remodelling, transient sequestration of free fatty acid (FA), as well as for production of FA‐derived defensive compounds (Shimada, Hayashi, & Hara‐Nishimura, ; Yang & Benning, ), however, a role of TG in salt tolerance has remained understudied.…”

Section: Introductionmentioning

confidence: 99%

Single cell‐type analysis of cellular lipid remodelling in response to salinity in the epidermal bladder cells of the model halophyte Mesembryanthemum crystallinum

Barkla

Garibay-Hernández

Melzer

et al. 2018

Plant Cell & Environment

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Salt stress causes dramatic changes in the organization and dynamic properties of membranes, however, little is known about the underlying mechanisms involved. Modified trichomes, known as epidermal bladder cells (EBC), on the leaves and stems of the halophyte Mesembryanthemum crystallinum can be successfully exploited as a single-cell-type system to investigate salt-induced changes to cellular lipid composition. In this study, alterations in key molecular species from different lipid classes highlighted an increase in phospholipid species, particularly those from phosphatidylcholine and phosphatidic acid (PA), where the latter is central to the synthesis of membrane lipids. Triacylglycerol (TG) species decreased during salinity, while there was little change in plastidic galactolipids. EBC transcriptomic and proteomic data mining revealed changes in genes and proteins involved in lipid metabolism and the upregulation of transcripts for PIPKIB, PI5PII, PIPKIII, and phospholipase D delta suggested the induction of signalling processes mediated by phosphoinositides and PA. TEM and flow cytometry showed the dynamic nature of lipid droplets in these cells under salt stress. Altogether, this work indicates that the metabolism of TG might play an important role in EBC response to salinity as either an energy reserve for sodium accumulation and/or driving membrane biosynthesis for EBC expansion.

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Membrane Dynamics and Multiple Functions of Oil Bodies in Seeds and Leaves

Cited by 80 publications

References 78 publications

Plant Unsaturated Fatty Acids: Multiple Roles in Stress Response

Plant Unsaturated Fatty Acids: Multiple Roles in Stress Response

New Insights Into the Role of Seed Oil Body Proteins in Metabolism and Plant Development

Single cell‐type analysis of cellular lipid remodelling in response to salinity in the epidermal bladder cells of the model halophyte Mesembryanthemum crystallinum

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