The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients
Eriophorum spp. are abundant perennial graminoids in the Arctic tundra and boreal peatlands. Because ecological studies indicated that some plants are unusually productive on infertile and cold sites, the anatomy of the overwintering corms of Eriophorum vaginatum (L.) and Eriophorum scheuchzeri (Hop...
Published in: | Journal of Experimental Botany |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2004
|
Subjects: | |
Online Access: | http://jxb.oxfordjournals.org/cgi/content/short/55/397/731 https://doi.org/10.1093/jxb/erh054 |
id |
fthighwire:oai:open-archive.highwire.org:jexbot:55/397/731 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:jexbot:55/397/731 2023-05-15T15:13:06+02:00 The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients Cholewa, Ewa Griffith, Marilyn 2004-03-01 00:00:00.0 text/html http://jxb.oxfordjournals.org/cgi/content/short/55/397/731 https://doi.org/10.1093/jxb/erh054 en eng Oxford University Press http://jxb.oxfordjournals.org/cgi/content/short/55/397/731 http://dx.doi.org/10.1093/jxb/erh054 Copyright (C) 2004, Society for Experimental Biology Plants and the Environment TEXT 2004 fthighwire https://doi.org/10.1093/jxb/erh054 2013-05-26T16:46:54Z Eriophorum spp. are abundant perennial graminoids in the Arctic tundra and boreal peatlands. Because ecological studies indicated that some plants are unusually productive on infertile and cold sites, the anatomy of the overwintering corms of Eriophorum vaginatum (L.) and Eriophorum scheuchzeri (Hoppe) were examined to determine their involvement in nutrient uptake and storage. Components of the long‐distance transport pathways were identified within the plants by using histochemical techniques and transport of apoplastic and symplastic dyes. E. scheuchzeri produced a rhizome that consisted mainly of storage parenchyma cells within which collateral vascular bundles were centrally located and arranged in a circle. By contrast, E. vaginatum developed a ring of horizontally arranged xylem and phloem, in addition to axial amphivasal vascular bundles leading to the leaves, all of which were bordered by transfer cells. As shown by the transport of fluorescein in the phloem and Safranine O in the xylem, each axial bundle and adventitious root contacted the horizontal ring of vascular tissues so that solutes from one vascular bundle were translocated into the vascular ring and circulated to another vascular bundle and/or to the roots. In addition, special groups of sclereids that functioned in both phloem and xylem transport were found at the base of the leaf traces and within junctions of senescing roots. These sclereids were named ‘vascular sclerenchyma’ and it was hypothesized that they provide a moving end for the vascular system because the corm dies progressively from the distal end as it grows upward from the apical meristem. It was concluded that this unusual vascular system of E. vaginatum is efficient in recycling nutrients internally, which may account for its competitive advantage in infertile and cold sites. Text Arctic Eriophorum Eriophorum scheuchzeri Tundra HighWire Press (Stanford University) Arctic Journal of Experimental Botany 55 397 731 741 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Plants and the Environment |
spellingShingle |
Plants and the Environment Cholewa, Ewa Griffith, Marilyn The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients |
topic_facet |
Plants and the Environment |
description |
Eriophorum spp. are abundant perennial graminoids in the Arctic tundra and boreal peatlands. Because ecological studies indicated that some plants are unusually productive on infertile and cold sites, the anatomy of the overwintering corms of Eriophorum vaginatum (L.) and Eriophorum scheuchzeri (Hoppe) were examined to determine their involvement in nutrient uptake and storage. Components of the long‐distance transport pathways were identified within the plants by using histochemical techniques and transport of apoplastic and symplastic dyes. E. scheuchzeri produced a rhizome that consisted mainly of storage parenchyma cells within which collateral vascular bundles were centrally located and arranged in a circle. By contrast, E. vaginatum developed a ring of horizontally arranged xylem and phloem, in addition to axial amphivasal vascular bundles leading to the leaves, all of which were bordered by transfer cells. As shown by the transport of fluorescein in the phloem and Safranine O in the xylem, each axial bundle and adventitious root contacted the horizontal ring of vascular tissues so that solutes from one vascular bundle were translocated into the vascular ring and circulated to another vascular bundle and/or to the roots. In addition, special groups of sclereids that functioned in both phloem and xylem transport were found at the base of the leaf traces and within junctions of senescing roots. These sclereids were named ‘vascular sclerenchyma’ and it was hypothesized that they provide a moving end for the vascular system because the corm dies progressively from the distal end as it grows upward from the apical meristem. It was concluded that this unusual vascular system of E. vaginatum is efficient in recycling nutrients internally, which may account for its competitive advantage in infertile and cold sites. |
format |
Text |
author |
Cholewa, Ewa Griffith, Marilyn |
author_facet |
Cholewa, Ewa Griffith, Marilyn |
author_sort |
Cholewa, Ewa |
title |
The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients |
title_short |
The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients |
title_full |
The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients |
title_fullStr |
The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients |
title_full_unstemmed |
The unusual vascular structure of the corm of Eriophorum vaginatum: implications for efficient retranslocation of nutrients |
title_sort |
unusual vascular structure of the corm of eriophorum vaginatum: implications for efficient retranslocation of nutrients |
publisher |
Oxford University Press |
publishDate |
2004 |
url |
http://jxb.oxfordjournals.org/cgi/content/short/55/397/731 https://doi.org/10.1093/jxb/erh054 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Eriophorum Eriophorum scheuchzeri Tundra |
genre_facet |
Arctic Eriophorum Eriophorum scheuchzeri Tundra |
op_relation |
http://jxb.oxfordjournals.org/cgi/content/short/55/397/731 http://dx.doi.org/10.1093/jxb/erh054 |
op_rights |
Copyright (C) 2004, Society for Experimental Biology |
op_doi |
https://doi.org/10.1093/jxb/erh054 |
container_title |
Journal of Experimental Botany |
container_volume |
55 |
container_issue |
397 |
container_start_page |
731 |
op_container_end_page |
741 |
_version_ |
1766343704951390208 |