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Daryl E Enstone - One of the best experts on this subject based on the ideXlab platform.
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development of the endodermis and Hypodermis of typha glauca godr and typha angustifolia l roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typical, developing a thin Casparian band near the root tip, followed by suberin lamellae and asymmetric, secondary, lignified walls (C-type at maturity). Passage cells were present at an intermediate stage but eventually disappeared when all cells developed lamellae and secondary walls. The Hypodermis was multiple (four to six layers at maturity) and began differentiating near the root tip. Here, the radial and transverse walls of the outermost layer did not dissolve in strong acid and the former were wavy in the longitudinal direction, both features characteristic of a Casparian band, but these walls were permeable to berberine. No other indication of a wall modification was seen for 3 weeks, at which time the root had become determinate and aerenchyma was beginning to form in the midcortex. Casparian bands, whic...
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Development of the endodermis and Hypodermis of Typha glauca Godr. and Typha angustifolia L. roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typ...
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a survey of angiosperm species to detect hypodermal casparian bands i roots with a uniseriate Hypodermis and epidermis
Botanical Journal of the Linnean Society, 1990Co-Authors: Christopher J. Perumalla, Carol A. Peterson, Daryl E EnstoneAbstract:PERUMALLA, C. J., PETERSON, C. A. & ENSTONE, D. E., 1990. A survey of angiosperm species to detect hypodermal Casparian bands. I. Roots with a uniseriate Hypodermis and epidermis. Roots of 181 species from 53 families were surveyed to determine the frequency of Casparian bands in hypodermal layers. For six species, inconclusive data were obtained. The roots of the remaining 175 species were divided into three categories on the basis of this survey. In the first, a Hypodermis is absent (12 species): no wall modifications were observed in the outer cortex and this region was permeable to the apoplastic dye Cellufluor. In the second, a Hypodermis is present, but a hypodermal Casparian band is absent (seven species). In roots of six species, no wall modifications were detected in the Hypodermis; the one remaining species had lignified phi thickenings which were permeable to Cellufluor. In the third, both a Hypodermis and a hypodermal Casparian band are present (156 species). These Casparian bands consisted of suberin deposits throughout the width of the anticlinal walls of the Hypodermis. The tangential walls of the Hypodermis were also suberized, indicating that suberin lamellae were probably also present. Hypodermal Casparian bands were found in roots of hydrophytic, mesophytic and xerophytic species and in members of primitive as well as advanced families. The widespread occurrence of these bands (in 89% of the species surveyed) suggests that they were present in the type ancestral to the flowering plants and that this feature has been retained by many species in this group. The epidermal cell walls of the majority of species examined were suberized but were permeable to Cellufluor.
James L. Seago - One of the best experts on this subject based on the ideXlab platform.
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the root cortex of the nymphaeaceae cabombaceae and nelumbonaceae
Journal of The Torrey Botanical Society, 2002Co-Authors: James L. SeagoAbstract:SEAGO, JR., J. L. (Department of Biology, State University of New York, College at Oswego, New York 13126) The Root Cortex of the Nymphaeaceae, Cabombaceae, and Nelumbonaceae. J. Torrey Bot. Soc. 129: 19. 2002.-The roots of selected water lilies, Nymphaeaceae and Cabombaceae, and water lotuses, Nelumbonaceae, were examined using epifluorescence, brightfield, and modified darkfield microscopy to determine the characteristics of root cortical structure. The members of the Nymphaeaceae have an endodermis usually with Casparian bands only, many astrosclereids and some transverse diaphragms scattered throughout the aerenchyma, and a Hypodermis with a uniseriate exodermis with Casparian bands and suberin lamellae, although there may be some secondary, cellulosic thickening. The Cabombaceae are characterized by small roots with an endodermis with Casparian bands and uneven suberin lamellae, aerenchyma without sclereids or diaphragms, and an exodermis with Casparian bands and distinctive suberin lamellae. The Nelumbonaceae are distinctly different: Nelumbo has an endodermis of Casparian bands, suberin lamellae, and secondarily lignified walls, an aerenchyma without sclereids or diaphragms, and a multiseriate Hypodermis with a uniseriate exodermis of Casparian bands and suberin lamellae, and an inner Hypodermis with distinctly lignified walls.
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development and structure of the root cortex in caltha palustris l and nymphaea odorata ait
Annals of Botany, 2000Co-Authors: James L. Seago, Laura J Kinsley, Carol A. Peterson, Jennifer BroderickAbstract:Structural features of the mature root cortex and its apoplastic permeability to dyes have been determined for two dicotyledonous wetland plants of differing habitats: Nymphaea odorata, growing rooted in water and mud, and Caltha palustris, growing in temporal wetlands among cattails. In mature roots, movement of the apoplastic dyes, berberine and safranin, into the roots was blocked at the Hypodermis, indicating the presence of an exodermis. A Hypodermis with an exodermis, i.e. Casparian bands in the outermost uniseriate layer plus suberin lamellae, is present in both species. In N. odorata, hypodermal walls are further modified with cellulosic secondary walls. Roots of N. odorata and C. palustris have an endodermis with Casparian bands only. A honeycomb aerenchyma is produced by differential expansion in N. odorata and includes astrosclereids and diaphragms, while roots of C. palustris have no aerenchyma, but some irregular lacunae are found in old roots. These aspects of cortex structure are related to an open meristem organization, with unusual patterns of cell divisions in certain ground meristem cells (called semi-regular hexagon cells) of N. odorata. The correlation between aerenchyma pattern and hypodermal structure appears to be related to habitat differences.
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Development of the endodermis and Hypodermis of Typha glauca Godr. and Typha angustifolia L. roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typ...
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development of the endodermis and Hypodermis of typha glauca godr and typha angustifolia l roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typical, developing a thin Casparian band near the root tip, followed by suberin lamellae and asymmetric, secondary, lignified walls (C-type at maturity). Passage cells were present at an intermediate stage but eventually disappeared when all cells developed lamellae and secondary walls. The Hypodermis was multiple (four to six layers at maturity) and began differentiating near the root tip. Here, the radial and transverse walls of the outermost layer did not dissolve in strong acid and the former were wavy in the longitudinal direction, both features characteristic of a Casparian band, but these walls were permeable to berberine. No other indication of a wall modification was seen for 3 weeks, at which time the root had become determinate and aerenchyma was beginning to form in the midcortex. Casparian bands, whic...
Carol A. Peterson - One of the best experts on this subject based on the ideXlab platform.
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development and structure of the root cortex in caltha palustris l and nymphaea odorata ait
Annals of Botany, 2000Co-Authors: James L. Seago, Laura J Kinsley, Carol A. Peterson, Jennifer BroderickAbstract:Structural features of the mature root cortex and its apoplastic permeability to dyes have been determined for two dicotyledonous wetland plants of differing habitats: Nymphaea odorata, growing rooted in water and mud, and Caltha palustris, growing in temporal wetlands among cattails. In mature roots, movement of the apoplastic dyes, berberine and safranin, into the roots was blocked at the Hypodermis, indicating the presence of an exodermis. A Hypodermis with an exodermis, i.e. Casparian bands in the outermost uniseriate layer plus suberin lamellae, is present in both species. In N. odorata, hypodermal walls are further modified with cellulosic secondary walls. Roots of N. odorata and C. palustris have an endodermis with Casparian bands only. A honeycomb aerenchyma is produced by differential expansion in N. odorata and includes astrosclereids and diaphragms, while roots of C. palustris have no aerenchyma, but some irregular lacunae are found in old roots. These aspects of cortex structure are related to an open meristem organization, with unusual patterns of cell divisions in certain ground meristem cells (called semi-regular hexagon cells) of N. odorata. The correlation between aerenchyma pattern and hypodermal structure appears to be related to habitat differences.
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Development of the endodermis and Hypodermis of Typha glauca Godr. and Typha angustifolia L. roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typ...
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development of the endodermis and Hypodermis of typha glauca godr and typha angustifolia l roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typical, developing a thin Casparian band near the root tip, followed by suberin lamellae and asymmetric, secondary, lignified walls (C-type at maturity). Passage cells were present at an intermediate stage but eventually disappeared when all cells developed lamellae and secondary walls. The Hypodermis was multiple (four to six layers at maturity) and began differentiating near the root tip. Here, the radial and transverse walls of the outermost layer did not dissolve in strong acid and the former were wavy in the longitudinal direction, both features characteristic of a Casparian band, but these walls were permeable to berberine. No other indication of a wall modification was seen for 3 weeks, at which time the root had become determinate and aerenchyma was beginning to form in the midcortex. Casparian bands, whic...
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A survey of angiosperm species to detect hypodermal Casparian bands. III. Rhizomes.
Botanical Journal of the Linnean Society, 1990Co-Authors: Christopher J. Perumalla, Jerry G. Chmielewski, Carol A. PetersonAbstract:PERUMALLA, C. J., CHMIELEWSKI, J. G. & PETERSON, C A., 1990. A survey of angiosperm species to detect hypodermal Casparian bands. III. Rhizomes. Rhizomes of ten species of the class Magnoliopsida (Dicotyledoneae) and five species of the class Liliopsida (Monocotyledoneae) were studied to determine whether Casparian bands exist in their hypodermes. The hypodermal walls of rhizomes of all species surveyed appeared autofluorescent under violet light. In sections cleared with NaOH and stained with Chelidonium majus root extract, the radial walls and sometimes the tangential walls of the Hypodermis showed bright fluorescence. When the rhizomes were treated with the apoplastic dye, Cellufluor, the dye was initially blocked by the cuticle. When the continuity of the cuticle was disrupted with a needle before treating with Cellufluor, the dye penetrated all the walls of the epidermis and the outer tangential walls of the Hypodermis but was blocked by the radial walls of the Hypodermis. The walls of the Hypodermis stained positively for suberin or suberin and lignin and were resistant to treatment with concentrated sulphuric acid. On the basis of the above tests, it is concluded that Casparian bands are present in the Hypodermis of rhizomes of all species surveyed.
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a survey of angiosperm species to detect hypodermal casparian bands i roots with a uniseriate Hypodermis and epidermis
Botanical Journal of the Linnean Society, 1990Co-Authors: Christopher J. Perumalla, Carol A. Peterson, Daryl E EnstoneAbstract:PERUMALLA, C. J., PETERSON, C. A. & ENSTONE, D. E., 1990. A survey of angiosperm species to detect hypodermal Casparian bands. I. Roots with a uniseriate Hypodermis and epidermis. Roots of 181 species from 53 families were surveyed to determine the frequency of Casparian bands in hypodermal layers. For six species, inconclusive data were obtained. The roots of the remaining 175 species were divided into three categories on the basis of this survey. In the first, a Hypodermis is absent (12 species): no wall modifications were observed in the outer cortex and this region was permeable to the apoplastic dye Cellufluor. In the second, a Hypodermis is present, but a hypodermal Casparian band is absent (seven species). In roots of six species, no wall modifications were detected in the Hypodermis; the one remaining species had lignified phi thickenings which were permeable to Cellufluor. In the third, both a Hypodermis and a hypodermal Casparian band are present (156 species). These Casparian bands consisted of suberin deposits throughout the width of the anticlinal walls of the Hypodermis. The tangential walls of the Hypodermis were also suberized, indicating that suberin lamellae were probably also present. Hypodermal Casparian bands were found in roots of hydrophytic, mesophytic and xerophytic species and in members of primitive as well as advanced families. The widespread occurrence of these bands (in 89% of the species surveyed) suggests that they were present in the type ancestral to the flowering plants and that this feature has been retained by many species in this group. The epidermal cell walls of the majority of species examined were suberized but were permeable to Cellufluor.
Antonio Mirandavizuete - One of the best experts on this subject based on the ideXlab platform.
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the peroxisomal fatty acid transporter abcd1 pmp 4 is required in the c elegans Hypodermis for axonal maintenance a worm model for adrenoleukodystrophy
Free Radical Biology and Medicine, 2020Co-Authors: Andrea Coppa, Sanjib Guha, Stephane Fourcade, Janani Parameswaran, Montserrat Ruiz, Ann B Moser, Agatha Schluter, Michael P Murphy, Jose M Lizcano, Antonio MirandavizueteAbstract:Abstract Adrenoleukodystrophy is a neurometabolic disorder caused by a defective peroxisomal ABCD1 transporter of very long-chain fatty acids (VLCFAs). Its pathogenesis is incompletely understood. Here we characterize a nematode model of X-ALD with loss of the pmp-4 gene, the worm orthologue of ABCD1. These mutants recapitulate the hallmarks of X-ALD: i) VLCFAs accumulation and impaired mitochondrial redox homeostasis and ii) axonal damage coupled to locomotor dysfunction. Furthermore, we identify a novel role for PMP-4 in modulating lipid droplet dynamics. Importantly, we show that the mitochondria targeted antioxidant MitoQ normalizes lipid droplets size, and prevents axonal degeneration and locomotor disability, highlighting its therapeutic potential. Moreover, PMP-4 acting solely in the Hypodermis rescues axonal and locomotion abnormalities, suggesting a myelin-like role for the Hypodermis in providing essential peroxisomal functions for the nematode nervous system.
Chris A Scholey - One of the best experts on this subject based on the ideXlab platform.
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Development of the endodermis and Hypodermis of Typha glauca Godr. and Typha angustifolia L. roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typ...
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development of the endodermis and Hypodermis of typha glauca godr and typha angustifolia l roots
Botany, 1999Co-Authors: James L. Seago, Carol A. Peterson, Daryl E Enstone, Chris A ScholeyAbstract:The development of the endodermis and Hypodermis in adventitious roots of Typha angustifolia L. and Typha glauca Godr. was followed from the apical meristem to full maturity. The endodermis was typical, developing a thin Casparian band near the root tip, followed by suberin lamellae and asymmetric, secondary, lignified walls (C-type at maturity). Passage cells were present at an intermediate stage but eventually disappeared when all cells developed lamellae and secondary walls. The Hypodermis was multiple (four to six layers at maturity) and began differentiating near the root tip. Here, the radial and transverse walls of the outermost layer did not dissolve in strong acid and the former were wavy in the longitudinal direction, both features characteristic of a Casparian band, but these walls were permeable to berberine. No other indication of a wall modification was seen for 3 weeks, at which time the root had become determinate and aerenchyma was beginning to form in the midcortex. Casparian bands, whic...