The suberin lamella, a possible barrier to water movement from the veins to the mesophyll ofThemeda triandra forsk

Botha, C. E. J.; Evert, Ray F.; Cross, R. H. M.; Marshall, DC

doi:10.1007/bf01280209

Cited by 30 publications

(19 citation statements)

References 16 publications

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“…The possible physiological significance of these patterns oflignification and suberization are realized by a comparison of our histochemical and tracer studies on a sink tissue with more extensive studies of others (Botha et al, 1982;Botha and Evert, 1986;Eastman et al, 1988a, b;Evert et al, 1985) on source tissues. Eastman et al (1988a, b) studied the bundle sheaths in grass leaves using a combination of histochemical stains, ultrastructure.…”

Section: Discussionmentioning

confidence: 86%

Developmental Changes in the Anatomy of the Sugarcane Stem in Relation to Phloem Unloading and Sucrose Storage

et al. 1992

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Transverse sections of immature and mature sugarcane internodes were investigated anatomically with white and fluorescence light microscopy. The pattern of lignification and suberization was tested histo‐chemically. Lignification began in the xylem of vascular bundles and progressed through the sclerenchymatic bundle sheath into the storage parenchyma. Suberization began in parenchyma cells adjacent to vascular bundle sheaths and spread to the storage parenchyma and outer sheath cells. In mature internodes most of the storage parenchyma was lignified and suberized to a significant degree, except in portions of walls of isolated cells. The pattern of increasing lignification and suberization in maturing internodes more or less paralleled an increase of sucrose in stem tissue. In mature internodes having a high sucrose concentration, the vascular tissue was surrounded by thick‐walled, lignified and suberized sclerenchyma cells. The apoplastic tracer dyes triso‐dium 3‐hydroxy‐5,8,10‐pyrenetrisulfonate (PTS) and amido black 10 B, fed into cut ends of the stalk, wereconfined to the vascular bundles in all internodes above the one that was cut — with no dye apparently in storage parenchyma tissue. Thus both structural and experimental evidence is consistent with vascular tissue being increasingly isolated from the storage parenchyma as maturation of the tissue proceeds. We conclude that in mature internodes the pathway for sugars from the phloem to the storage parenchyma is symplastic. The data suggest that an increasingly greater role for a symplastic pathway of sugar transfer occurs as the tissue undergoes lignification/suberization.

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Section: Discussionmentioning

confidence: 86%

Developmental Changes in the Anatomy of the Sugarcane Stem in Relation to Phloem Unloading and Sucrose Storage

et al. 1992

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“…Kuo and coworkers (14) observed that ferric chloride was restricted to movement in the vascular tissue of both longitudinal and transverse veins in wheat leaves, and concluded that vessel walls restricted solute movement. Botha and coworkers (3) observed that the movement of ferrous ions was restricted to vascular tissues and bundle sheath cells in Themeda triandra. They concluded that the suberin lamellae of the outer bundle sheath cell walls, but not the vessel walls, restricted movement ofsolutes into the mesophyll.…”

Section: Discussionmentioning

confidence: 99%

“…These Casparian bands are hydrophobic and prohibit the apoplastic movement of water and solutes into the vascular system of roots. Although Strugger (23) reported that the dyes berberine sulfate, eosin, sulforhodamine G, and PTS3 moved from the veins of rye and wheat leaves to the epidermis, there are indications from later work (3,4,17,24) endodermal cell walls (18,20) and fluorescent dyes, mobile (PTS) and immobile (Calcufluor white M2R) within the apoplast (8,19,21,23,25), the present study was undertaken to clarify whether the mestome sheath cell walls could restrict apoplastic movement from the vascular system.…”

mentioning

confidence: 99%

Permeability of the Suberized Mestome Sheath in Winter Rye

Peterson

Griffith²,

Hüner³

1985

Plant Physiol.

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“…, 1977; Botha, 1992), but their apoplastic compartments are separated by a suberin lamellae (Evert et al. , 1977; Hattersley & Browing, 1981; Botha et al. , 1982; Evert et al.…”

Section: The Apoplast Of Leaves – a Compartment Of Storage And Ofmentioning

confidence: 99%

The apoplast and its significance for plant mineral nutrition

2001

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SummaryIt has only recently become apparent that the apoplast plays a major role in a diverse range of processes, including intercellular signalling, plant-microbe interactions and both water and nutrient transport. Broadly defined, the apoplast constitutes all compartments beyond the plasmalemma -the interfibrillar and intermicellar space of the cell walls, and the xylem, including its gas-and water-filled intercellular space -extending to the rhizoplane and cuticle of the outer plant surface. The physicochemical properties of cell walls influence plant mineral nutrition, as nutrients do not simply pass through the apoplast to the plasmalemma but can also be adsorbed or fixed to cell-wall components. Here, current progress in understanding the significance of the apoplast in plant mineral nutrition is reviewed. The contribution of the root apoplast to short-distance transport and nutrient uptakes is examined particularly in relation to Na + toxicity and Al 3+ tolerance. The review extends to long-distance transport and the role of the apoplast as a habitat for microorganisms. In the leaf, the apoplast might have benefits over the vacuole as a site for short-term nutrient storage and solute exchange with the atmosphere.

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The suberin lamella, a possible barrier to water movement from the veins to the mesophyll ofThemeda triandra forsk

Cited by 30 publications

References 16 publications

Developmental Changes in the Anatomy of the Sugarcane Stem in Relation to Phloem Unloading and Sucrose Storage

Developmental Changes in the Anatomy of the Sugarcane Stem in Relation to Phloem Unloading and Sucrose Storage

Permeability of the Suberized Mestome Sheath in Winter Rye

The apoplast and its significance for plant mineral nutrition

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