Vesicles Are Persistent Features of Different Plastids

Lindquist, Emelie; Solymosi, Katalin; Aronsson, Henrik

doi:10.1111/tra.12427

Cited by 30 publications

(29 citation statements)

References 77 publications

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“…As reported, elaioplast in tapetum is derived from proplastids (Piffanelli et al, 1998). Recent bioinformatics analysis and experimental evidence supported that vesicle transport also exists in different kinds of plastids, including proplastids (Lindquist et al, 2016). COPII-related proteins may mediate vesicle trafficking in chloroplasts (Lindquist et al, 2016).…”

Section: Discussionmentioning

confidence: 72%

“…Recent bioinformatics analysis and experimental evidence supported that vesicle transport also exists in different kinds of plastids, including proplastids (Lindquist et al, 2016). COPII-related proteins may mediate vesicle trafficking in chloroplasts (Lindquist et al, 2016). For instance, the chloroplast protein CPSAR1, which shows similarity to the AtSAR1 protein in cytoplasm, and CPRabA5e may participate in thylakoid biogenesis and vesicle trafficking in Arabidopsis (Garcia et al, 2010;Khan et al, 2013;Lindquist and Aronsson, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, the chloroplast protein CPSAR1, which shows similarity to the AtSAR1 protein in cytoplasm, and CPRabA5e may participate in thylakoid biogenesis and vesicle trafficking in Arabidopsis (Garcia et al, 2010;Khan et al, 2013;Lindquist and Aronsson, 2014). But whether other COPII proteins are involved in vesicle traffic in chloroplasts is still unknown (Lindquist et al, 2016). Therefore, one possible explanation for the retarded development of elaioplast in atsec31b is that the disruption of AtSEC31B leads to the lower efficiency of COPII protein transport in proplastids, and then the differentiation from proplastid to elaioplast is postponed in the atsec31b mutant.…”

Section: Discussionmentioning

confidence: 99%

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Secretory COPII Protein SEC31B Is Required for Pollen Wall Development

et al. 2016

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The pollen wall protects pollen grains from abiotic and biotic stresses. During pollen wall development, tapetal cells play a vital role by secreting proteins, signals, and pollen wall material to ensure microspore development. But the regulatory mechanism underlying the secretory pathway of the tapetum is largely unknown. Here, we characterize the essential role of the Arabidopsis (Arabidopsis thaliana) COPII protein SECRETORY31B (SEC31B) in pollen wall development and the secretory activity of tapetal cells. The sporophyte-controlled atsec31b mutant exhibits severe pollen and seed abortion. Transmission electron microscopy observation indicates that pollen exine formation in the atsec31b mutant is disrupted significantly. AtSEC31B is a functional COPII protein revealed by endoplasmic reticulum (ER) exit site localization, interaction with AtSEC13A, and retarded ER-Golgi protein trafficking in the atsec31b mutant. A genetic tapetum-specific rescue assay indicates that AtSEC31B functions primarily in the tapetum. Moreover, deletion of AtSEC31B interrupted the formation of the ER-derived tapetosome and altered the location of the ATP-BINDING CASSETTE TRANSPORTER9 protein in the tapetum. Therefore, this work demonstrates that AtSEC31B plays a vital role in pollen wall development by regulating the secretory pathway of the tapetal cells.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Secretory COPII Protein SEC31B Is Required for Pollen Wall Development

et al. 2016

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“…Chloroplasts are one type of many forms of plastids, semi-autonomous organelles that likely evolved from an ancestral symbiotic relationship between cyanobacteria and eukaryotes. Modern plastids take multiple forms throughout the plant body, where they are specialized for different functions (Lindquist et al 2016). All plastids provide critical functions for the plant, including fatty acid, lipid, tetrapyrrole, isoprenoid, and carbohydrate metabolism, signaling and redox processes, among others (Rolland et al 2012).…”

Section: Acknowledgments -mentioning

confidence: 99%

Lipid transport required to make lipids of photosynthetic membranes

2018

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Photosynthetic membranes provide much of the usable energy for life on earth. To produce photosynthetic membrane lipids, multiple transport steps are required, including fatty acid export from the chloroplast stroma to the endoplasmic reticulum, and lipid transport from the endoplasmic reticulum to the chloroplast envelope membranes. Transport of hydrophobic molecules through aqueous space is energetically unfavorable and must be catalyzed by dedicated enzymes, frequently on specialized membrane structures. Here, we review photosynthetic membrane lipid transport to the chloroplast in the context of photosynthetic membrane lipid synthesis. We independently consider the identity of transported lipids, the proteinaceous transport components, and membrane structures which may allow efficient transport. Recent advances in lipid transport of chloroplasts, bacteria, and other systems strongly suggest that lipid transport is achieved by multiple mechanisms which include membrane contact sites with specialized protein machinery. This machinery is likely to include the TGD1, 2, 3 complex with the TGD5 and TGD4/LPTD1 systems, and may also include a number of proteins with domains similar to other membrane contact site lipid-binding proteins. Importantly, the likelihood of membrane contact sites does not preclude lipid transport by other mechanisms including vectorial acylation and vesicle transport. Substantial progress is needed to fully understand all photosynthetic membrane lipid transport processes and how they are integrated.

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“…In addition to prolamellar bodies present in chlorenchyma tissues developing under light deprivation, plastids of lightgrown and light-exposed tissues can also contain such peculiar membranes. Regularly arranged vesicle clusters present in chloroplasts may also form non-linear membrane organizations (Lindquist et al, 2016), and prolamellar body-like structures have been induced by UV irradiation of fruit plastids (Kovács and Keresztes, 2002), and several cells with secretory function have been reported to contain prolamellar body-like tubuloreticular membrane structures.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Light on Plastid Differentiation, Chlorophyll Biosynthesis, and Essential Oil Composition in Rosemary (Rosmarinus officinalis) Leaves and Cotyledons

et al. 2020

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It is unclear whether light affects the structure and activity of exogenous secretory tissues like glandular hairs. Therefore, transmission electron microscopy was first used to study plastid differentiation in glandular hairs and leaves of light-grown rosemary (Rosmarinus officinalis "Arp") plants kept for 2 weeks under ambient light conditions. During our detailed analyses, among others, we found leucoplasts with tubuloreticular membrane structures resembling prolamellar bodies in stalk cell plastids of peltate glandular hairs. To study the effect of darkness on plastid differentiation, we then dark-forced adult, light-grown rosemary plants for 2 weeks and observed occasionally the development of new shoots with elongated internodes and pale leaves on them. Absorption and fluorescence spectroscopic analyses of the chlorophyllous pigment contents, the native arrangement of the pigment-protein complexes and photosynthetic activity confirmed that the first and second pairs of leaf primordia of darkforced shoots were partially etiolated (contained low amounts of protochlorophyll/ide and residual chlorophylls, had etio-chloroplasts with prolamellar bodies and low grana, and impaired photosynthesis). Darkness did not influence plastid structure in fifth leaves or secretory tissues (except for head cells of peltate glandular hairs in which rarely tubuloreticular membranes appeared). The mesophyll cells of cotyledons of 2week-old dark-germinated rosemary seedlings contained etioplasts with highly regular prolamellar bodies similar to those in mesophyll etio-chloroplasts of leaves and clearly differing from tubuloreticular membranes of secretory cells. Analyses of the essential oil composition obtained after solid phase microextraction and gas chromatography-mass spectroscopy showed that in addition to light, the age of the studied organ (i.e., first leaf primordia and leaf tip vs. fifth, fully developed green leaves) and the type of the organ

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Vesicles Are Persistent Features of Different Plastids

Cited by 30 publications

References 77 publications

Secretory COPII Protein SEC31B Is Required for Pollen Wall Development

Secretory COPII Protein SEC31B Is Required for Pollen Wall Development

Lipid transport required to make lipids of photosynthetic membranes

The Effect of Light on Plastid Differentiation, Chlorophyll Biosynthesis, and Essential Oil Composition in Rosemary (Rosmarinus officinalis) Leaves and Cotyledons

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