A survey of angiosperm species to detect hypodermal Casparian bands. III. Rhizomes

Perumalla, C. J.; Chmielewski, Jerry G.; Peterson, Carol A.

doi:10.1111/j.1095-8339.1990.tb00178.x

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…The presence of an endodermis in wetland plants such as Typha may not be unusual (Clarkson and Robards, 1975;Mauseth, 1988). While hypodermis has been illustrated in rhizomes and hypodermal Casparian bands have been demonstrated in Typha (Perumalla et al, 1990), the exodermal nature of the hypodermis has not been adequately demonstrated. Interestingly, these rhizomes are very similar to Typha roots with a multiseriate exodermis and uniseriate endodermis, each with Casparian bands, suberin lamellae and secondarily thickened walls bordering an aerenchymatous cortical region (see Seago et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Epifluorescent and Histochemical Aspects of Shoot Anatomy of Typha latifolia L., Typha angustifolia L. and Typha glauca Godr.

McManus¹

2002

Annals of Botany

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Using epifluorescent and histochemical techniques, we examined anatomical differences in the shoot organs of Typha latifolia, T. angustifolia and T. glauca. The leaf lamina of T. latifolia and T. glauca had enlarged epidermal cells and a thickened cuticle above the subepidermal vascular bundles; that of T. angustifolia lacked these characteristics. Leaf sheaths were similar among the species and all lacked the epidermal thickenings found in the lamina. The fertile stems had typical scattered vascular bundles with a band of fibres that was most prominent in T. glauca. The sterile stems were only 1 cm in length and contained a multiseriate hypodermis and a uniseriate endodermis over part of their length. The rhizomes were similar except for a pronounced band of fibres surrounding the central core in T. angustifolia. The rhizome was also characterized by an outer cortical region with a large multiseriate hypodermis/exodermis and a uniseriate endodermis with Casparian bands, suberin lamellae and secondarily thickened walls.

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Section: Discussionmentioning

confidence: 99%

Epifluorescent and Histochemical Aspects of Shoot Anatomy of Typha latifolia L., Typha angustifolia L. and Typha glauca Godr.

McManus¹

2002

Annals of Botany

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“…The latter term was used given observations of a potential Casparian Strip (CS). Indeed, in 93% of angiosperms studied, the exodermal layer was reported to possess an apoplastic barrier composed of suberin or lignin 20 . Given the nature of these features, the exodermis is hypothesized to function similarly to the endodermis, although the need for two potential barrier layers is less clear 21,22 .…”

Section: Suberin Biosynthetic Enzymes and Transcriptional Regulatorsmentioning

confidence: 99%

A Suberized Exodermis is Required for Tomato Drought Tolerance

et al. 2022

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“…In contrast, no exodermis has been reported for gymnosperm roots, and for seedless early vascular plants the exodermis has only been identified in the roots of the lycophyte genus Selaginella (Damus et al, 1997). The rhizomes of angiosperms also contain an exodermis (Perumalla et al, 1990a).…”

Section: Introductionmentioning

confidence: 99%

A Functional Exodermal Suberin is Key for Plant Nutrition and Growth in Potato

Company-Arumí,

Montells,

Iglesias

et al. 2023

Preprint

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Angiosperm roots, except in Arabidopsis, have both endodermis and exodermis, which regulate radial water and solute movement through lignin and suberin deposition. While endodermal suberin in Arabidopsis acts as a barrier to water and solute uptake and backflow, its implications in other angiosperms with both layers and the role of exodermal suberin remain unclear. We examined potato roots (Solanum tuberosum) and found that exodermis lacks the typical Casparian strip but forms an outer lignin cap, and quickly suberizes near the root tip. In contrast, a few endodermal cells, with Casparian strip, start suberizing much later. The continuous early exodermal suberization covering the root underlines its potential role in mineral nutrient radial movement. To demonstrate it, we used plants downregulating the suberin biosynthetic gene CYP86A33, which had the root suberin reduced in a 61%. Phenotypic analyses of the suberin-deficient mutant showed altered mineral nutrient concentration, slightly reduced water content and compromised growth. Micro-PIXE analyses identified the distribution of elements within the roots and highlighted anatomical compartments defined by apoplastic barriers. These findings advance our understanding of nutrient radial transport, demonstrate exodermal suberin as a bidirectional and selective barrier to element movement, and underscore its importance in nutrient homeostasis and plant growth.

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A survey of angiosperm species to detect hypodermal Casparian bands. III. Rhizomes

Cited by 10 publications

References 8 publications

Epifluorescent and Histochemical Aspects of Shoot Anatomy of Typha latifolia L., Typha angustifolia L. and Typha glauca Godr.

Epifluorescent and Histochemical Aspects of Shoot Anatomy of Typha latifolia L., Typha angustifolia L. and Typha glauca Godr.

A Suberized Exodermis is Required for Tomato Drought Tolerance

A Functional Exodermal Suberin is Key for Plant Nutrition and Growth in Potato

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