Plant lipid bodies and cell-cell signaling: A new role for an old organelle?

Schoot, Christiaan van der; Paul, Laju K.; Paul, Sheetal Babu; Rinne, Päivi L.H.

doi:10.4161/psb.6.11.17639

Cited by 57 publications

(58 citation statements)

References 88 publications

(155 reference statements)

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“…These include downregulation in the expression of specific transcription factor, CENL-1 [16], the poplar ortholog of the Arabidopsis TERMINAL FLOWER 1 which is required for stem elongation. Other events include changes in the types of lipid bodies in the apices of buds, which could be an important aspect of intracellular signaling [14], and by the formation of callose plugs that symplastically isolate bud meristems from the surrounding tissues. Meristems remain isolated until the advent of conditions that favor dormancy release.…”

Section: Overlapping Pathways With Dissimilar Outputs Leading To Senementioning

confidence: 99%

“…Several excellent papers and reviews have appeared over the last few years that have started to map both the physical and physiological networks that underpin senescence and dormancy, for example see [7][8][9][10][11][12][13][14][15][16] to name a few. There appears to be a central role for the clock related genes and in genes regulated by plant hormones (notably IAA, ABA and ethylene signaling) in controlling bud dormancy in the dicot systems.…”

Section: Introductionmentioning

confidence: 99%

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Senescence, dormancy and tillering in perennial C4 grasses

2014

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a b s t r a c tPerennial, temperate, C 4 grasses, such as switchgrass and miscanthus have been tabbed as sources of herbaceous biomass for the production of green fuels and chemicals based on a number of positive agronomic traits. Although there is important literature on the management of these species for biomass production on marginal lands, numerous aspects of their biology are as yet unexplored at the molecular level. Perenniality, a key agronomic trait, is a function of plant dormancy and winter survival of the belowground parts of the plants. These include the crowns, rhizomes and meristems that will produce tillers. Maintaining meristem viability is critical for the continued survival of the plants. Plant tillers emerge from the dormant crown and rhizome meristems at the start of the growing period in the spring, progress through a phase of vegetative growth, followed by flowering and eventually undergo senescence. There is nutrient mobilization from the aerial portions of the plant to the crowns and rhizomes during tiller senescence. Signals arising from the shoots and from the environment can be expected to be integrated as the plants enter into dormancy. Plant senescence and dormancy have been well studied in several dicot species and offer a potential framework to understand these processes in temperate C 4 perennial grasses. The availability of latitudinally adapted populations for switchgrass presents an opportunity to dissect molecular mechanisms that can impact senescence, dormancy and winter survival. Given the large increase in genomic and other resources for switchgrass, it is anticipated that projected molecular studies with switchgrass will have a broader impact on related species.

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Section: Overlapping Pathways With Dissimilar Outputs Leading To Senementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Senescence, dormancy and tillering in perennial C4 grasses

2014

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“…[6][7][8] Nevertheless, the precise functions of lipid droplets in non-seed cell types in plants are currently poorly understood.…”

mentioning

confidence: 99%

“…5 There is also emerging evidence that lipid droplets are highly dynamic organelles involved in a variety of cellular processes and physiological responses, some of which appear to be conserved among eukaryotes. [6][7][8] Nevertheless, the precise functions of lipid droplets in non-seed cell types in plants are currently poorly understood.…”

mentioning

confidence: 99%

Lipid droplet-associated proteins (LDAPs) are involved in the compartmentalization of lipophilic compounds in plant cells

Gidda

Watt²,

Collins-Silva

et al. 2013

Plant Signaling & Behavior

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Lipid droplets play an essential role in the life cycle of plants by housing lipid storage compounds, usually triacylglycerols, in seeds that are mobilized to support post-germinative growth, prior to photosynthetic establishment. Given this critical role in plant growth and development, the majority of research on plant lipid droplets has focused on their function in seed tissues. For instance, purification of lipid droplets from plant oilseeds resulted in the identification and characterization of the oleosins, which are an abundant class of lipid droplet-surface-associated proteins important for stabilizing lipid droplets during seed desiccation 1-3 and possibly serving as sites for recruitment of lipases that facilitate the breakdown of stored triacylglycerols during seedling establishment. 4 It is now appreciated, however, that lipid droplets have numerous functions beyond lipid storage in seeds and that they are present in nearly all plant cell types, many of which do not accumulate appreciable amounts of lipid, such as the cells in leaves, stems, and roots.5 There is also emerging evidence that lipid droplets are highly dynamic organelles involved in a variety of cellular processes and physiological responses, some of which appear to be conserved among eukaryotes. [6][7][8] Nevertheless, the precise functions of lipid droplets in non-seed cell types in plants are currently poorly understood.In an effort to increase our understanding of lipid droplet biogenesis and functions in plants, we recently characterized the proteome of lipid droplets isolated from the mesocarp of avocado (Persea americana).9 This tissue was selected for analysis since it is a rich source of non-seed lipid droplets that lack the abundant oleosins found in oilseed tissues. Briefly, proteins enriched in the isolated avocado mesocarp lipid droplet fraction were identified using a combination of multi-dimensional protein identification technology and peptide mass fingerprinting, using an avocado RNAseqderived "proteome" for query. Two of the most abundant proteins associated with these lipid droplets were highly similar (86%) in sequence to each other and, thus, were annotated as lipid dropletassociated protein 1 (LDAP1) and LDAP2 ( Fig. 1A; Pam_LDAP1 and Pam_LDAP2). We also showed previously that LDAP1 and LDAP2 gene expression during development of avocado mesocarp increased in correlation with oil accumulation.9 Interestingly, transcriptome analysis of various tissues of oil palm (Elaeis guineensis) revealed the presence of three LDAP-like genes, of which one of While lipid droplets have traditionally been considered as inert sites for the storage of triacylglycerols and sterol esters, they are now recognized as dynamic and functionally diverse organelles involved in energy homeostasis, lipid signaling, and stress responses. unlike most other organelles, lipid droplets are delineated by a half-unit membrane whose protein constituents are poorly understood, except in the specialized case of oleosins, which are associated with seed li...

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“…Adicionalmente, en el parénqui- (Ho et al, 2014). Dichas reservas constituidas principalmente por triacilglicéridos (TAGs) y proteínas oleosinas pueden ser movilizadas durante periodos de metabolismo activo (Chen et al, 1999;van der Schoot et al, 2011;Chapman et al, 2012). La presencia de lípidos o compuestos lipofílicos, como estructuras subcelulares en el tallo de M. uncinata, además de formar parte de las reservas de carbono en el tallo, podría representar una barrera hidrofóbica para prevenir la pérdida de agua o formar parte de una cubierta protectora contra patógenos, ataques de herbívoros y otros factores ambientales, como mencionan Rodrigues et al (2011).…”

Section: Perfil Fitoquímicounclassified

Caracteres anatómicos y fitoquímicos del tallo y raíz de Mammillaria uncinata (Cactaceae)

et al. 2017

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Antecedentes y Objetivos: Los integrantes de la familia Cactaceae subsisten a través de adaptaciones anatómicas y metabólicas como la síntesis de metabolitos primarios y secundarios con funciones específicas que les permiten desarrollarse en regiones áridas y semiáridas. Mammillaria es un género perteneciente a la tribu Cacteae y la literatura con respecto a sus caracteres anatómicos y fitoquímicos es escasa. Particularmente para la especie Mammillaria uncinata los estudios con ese tipo de enfoque son ausentes, por lo que los objetivos del presente trabajo fueron describir la estructura anatómica-histoquímica y el perfil fitoquímico del tallo y la raíz de la especie con la finalidad de contribuir al conocimiento de su biología y composición química.Métodos: El estudio se realizó con ejemplares recolectados en la región Altos Norte de Jalisco, México. Se emplearon la microtécnica convencional de inclusión en parafina y técnicas histoquímicas para la descripción de los caracteres anatómicos e histoquímicos, así como técnicas cualitativas para el estudio del perfil fitoquímico.Resultados clave: Algunos de los caracteres anatómicos más distintivos son laticíferos que producen un látex lechoso y cristales de morfología variable en el tallo. El análisis del perfil fitoquímico reveló la presencia abundante de metabolitos secundarios en el tallo, incluyendo alcaloides, esteroles, flavonoides y saponinas, mientras que en la raíz únicamente se detectó, de manera escasa, la presencia de esteroles y saponinas.Conclusiones: El estudio mostró la presencia, en Mammillaria uncinata, de caracteres anatómicos similares a otras especies de Cactaceae, así como la abundancia de fitoquímicos con potencial aplicación en diferentes áreas.

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Plant lipid bodies and cell-cell signaling: A new role for an old organelle?

Cited by 57 publications

References 88 publications

Senescence, dormancy and tillering in perennial C4 grasses

Senescence, dormancy and tillering in perennial C4 grasses

Lipid droplet-associated proteins (LDAPs) are involved in the compartmentalization of lipophilic compounds in plant cells

Caracteres anatómicos y fitoquímicos del tallo y raíz de Mammillaria uncinata (Cactaceae)

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