Origin and Development of Plasma Membrane Derived Invaginations in Vinca rosea L.

Mahlberg, Paul G.; Olson, Kenton; Walkinshaw, Charles H.

doi:10.2307/2441132

Cited by 14 publications

(4 citation statements)

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“…Multivesicular enclaves be came more apparent during after-ripen ing and early senescence. Similar struc tures have been described previously, although their significance is far from clear (Thomson, 1967a;Marchant and Robards, 1968;Mahlberg, Olson, andWalkinshaw, 1970, 1971). Appearance of the multivesicular invaginations in the epidermal cells tends to correlate with the formation of lacunae and loosening of the cell walls; however, whether there is a direct relationship is still questionable.…”

Section: Terminalsupporting

confidence: 73%

“…These vesicles were even more evident in the more mature green fruits, where some were appar ently free within the vacuoles. Similar structures have been observed in a va riety of other plant tissues, and the general consensus appears to be that the cytoplasmic vesicles and vacuolar pockets represent a pathway for move ment of material into the vacuole (Thomson, 1967b;Walker and Bisulputra, 1967;Coulomb, 1968Coulomb, , 1973Fin eran, 1970Fin eran, , 1971Mahlberg, Olson, and Walkinshaw, 1970;Villiers, 1971Villiers, ,1972aMesquita, 1972;Matile, 1974). The most striking changes associated with the tonoplast were in the epidermal cells of the maturing green fruits prior to color change.…”

Section: Terminalmentioning

confidence: 66%

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Ultrastructure of the epidermis of developing, ripening, and senescing navel oranges

Thomson¹,

Platt‐Aloia²

1976

Hilg

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Electron microscope studies revealed that throughout the development, maturation, and after-ripening of Navel orange fruits, the epidermal cells contained typical organelles. There were few significant changes in the ultrastructure of the organelles during these stages. However, there was considerable variation in the vacuoles, as well as changes in cytoplasmic inpockets and membranous configurations associated with the tonoplast, and changes in vacuolar content. These changes and variations probably indicate that the vacuoles have an important role as lysosomal compartments in accumulating and recycling cellular material during these stages. With early and late senescence there was a decrease in cytoplasmic organelles and a partial loss of membrane definition, indicating that metabolic dysfunctions associated with senescence may be related to the loss of compartmentation and the organizational integrity of the cells. Also with senescence, the vacuoles became filled with granular and lipid material, an indication that a reduction in the lytic and recycling capacity may have occurred. Dissolution of wall material also took place during this period. The final stage of degeneration was characterized by a loss of definition of membranes and organelles.

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Section: Terminalsupporting

confidence: 73%

Section: Terminalmentioning

confidence: 66%

Ultrastructure of the epidermis of developing, ripening, and senescing navel oranges

Thomson¹,

Platt‐Aloia²

1976

Hilg

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“…Multivesicular bodies have recently been identified as prevacuolar compartments in tobacco cells (Tse et al ., 2004). Autophagy in which MVBs are engulfed by the tonoplast and sequestered within the central vacuole has been reported in a number of studies (Walker and Bisalputra, 1967; Mahlberg et al ., 1971; Herman and Lamb, 1992). We found MVBs enveloped by the tonoplast and clusters of single vesicles in the central vacuole (Figs 2A and 4C).…”

Section: Discussionmentioning

confidence: 97%

Multivesicular bodies participate in a cell wall-associated defence response in barley leaves attacked by the pathogenic powdery mildew fungus

et al. 2006

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SummaryLocalized cell wall modification and accumulation of antimicrobial compounds beneath sites of fungal attack are common mechanisms for plant resistance to fungal penetration. In barley ( Hordeum vulgare ) leaves, light-microscopically visible vesicle-like bodies (VLBs) containing H 2 O 2 or phenolics frequently accumulate around cell wall appositions (syn. papillae), in which the penetration attempt of the biotrophic powdery mildew fungus Blumeria graminis f. sp. hordei ( Bgh ) is halted. By ultrastructural analyses, we demonstrated that the Bgh -induced VLBs represent different structures. VLBs intensively stained by H 2 O 2 -reactive dyes were actually small papillae instead of cytoplasmic vesicles. Other VLBs were identified as osmiophilic bodies or multivesicular compartments, designated paramural bodies (PMBs) and multivesicular bodies (MVBs). MVBs seemingly followed two distinct pathways: either they were engulfed by the tonoplast for degradation in the vacuole or they fused with the plasma membrane to release their internal vesicles into the paramural space and hence could be the origin of PMBs. MVBs and PMBs appeared to be multicomponent kits possibly containing building blocks to be readily assembled into papilla and antimicrobial compounds to be discharged against fungal penetration. Finally, we propose that released paramural vesicles might be similar to exosomes in animal cells.

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“…Secondary vacuoles of variable sizes formed by plasma membrane invaginations were observed in cultured cells, as well as in various living cells of intact plants (Mahlberg et al , , Mahlberg ). Complex accumulations of membranes consisting of vesicles, tubular structures or fibrous substances may develop within secondary vacuoles.…”

Section: Discussionmentioning

confidence: 99%

Leaf‐shape remodeling: programmed cell death in fistular leaves of Allium fistulosum

Zhou

et al. 2014

Physiologia Plantarum

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Some species of Allium in Liliaceae have fistular leaves. The fistular lamina of Allium fistulosum undergoes a process from solid to hollow during development. The aims were to reveal the process of fistular leaf formation involved in programmed cell death (PCD) and to compare the cytological events in the execution of cell death to those in the unusual leaf perforations or plant aerenchyma formation. In this study, light and transmission electron microscopy were used to characterize the development of fistular leaves and cytological events. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assays and gel electrophoresis were used to determine nuclear DNA cleavage during the PCD. The cavity arises in the leaf blade by degradation of specialized cells, the designated pre-cavity cells, in the center of the leaves. Nuclei of cells within the pre-cavity site become TUNEL-positive, indicating that DNA cleavage is an early event. Gel electrophoresis revealed that DNA internucleosomal cleavage occurred resulting in a characteristic DNA ladder. Ultrastructural analysis of cells at the different stages showed disrupted vacuoles, misshapen nuclei with condensed chromatin, degraded cytoplasm and organelles and emergence of secondary vacuoles. The cell walls degraded last, and residue of degraded cell walls aggregated together. These results revealed that PCD plays a critical role in the development of A. fistulosum fistular leaves. The continuous cavity in A. fistulosum leaves resemble the aerenchyma in the pith of some gramineous plants to improve gas exchange.

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Origin and Development of Plasma Membrane Derived Invaginations in Vinca rosea L.

Cited by 14 publications

References 0 publications

Ultrastructure of the epidermis of developing, ripening, and senescing navel oranges

Ultrastructure of the epidermis of developing, ripening, and senescing navel oranges

Multivesicular bodies participate in a cell wall-associated defence response in barley leaves attacked by the pathogenic powdery mildew fungus

Leaf‐shape remodeling: programmed cell death in fistular leaves of Allium fistulosum

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