Sectoriality in xylem connections between the bunch and leaves of the grapevine (Vitis vinifera) shoot

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Abstract

It is not clear how the xylem of a plant organ with a low transpiration rate, such as the grapevine (Vitis vinifera L.) bunch, is anatomically linked to surrounding leaves. The aim was to test the hypothesis that xylem connections to the grapevine bunch are sectorial using an apoplastic dye and a radioactive membrane-permeable nutrient analogue. The transport of eosin and pertechnetate (99mTcO4 -) revealed that bunches bearing unripe berries have xylem connections with primary leaves located on the same side of the shoot (common orthostichy) as the bunch. These connections also exist with secondary shoots arising from axillary buds in the same orthostichy as the bunch. These connections can include leaves in both orthostichies of the secondary shoot. Connections between the bunch and primary leaves in the opposite orthostichy are relatively uncommon. The challenge for future research is to determine the degree to which these connections are functional under normal physiological conditions.
Original languageEnglish
Pages (from-to)229-233
Number of pages5
JournalScientia Horticulturae
Volume168
DOIs
Publication statusPublished - Mar 2014

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Vitis vinifera
xylem
shoots
leaves
plant organs
small fruits
dyes
transpiration
buds
nutrients
testing

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title = "Sectoriality in xylem connections between the bunch and leaves of the grapevine (Vitis vinifera) shoot",
abstract = "It is not clear how the xylem of a plant organ with a low transpiration rate, such as the grapevine (Vitis vinifera L.) bunch, is anatomically linked to surrounding leaves. The aim was to test the hypothesis that xylem connections to the grapevine bunch are sectorial using an apoplastic dye and a radioactive membrane-permeable nutrient analogue. The transport of eosin and pertechnetate (99mTcO4 -) revealed that bunches bearing unripe berries have xylem connections with primary leaves located on the same side of the shoot (common orthostichy) as the bunch. These connections also exist with secondary shoots arising from axillary buds in the same orthostichy as the bunch. These connections can include leaves in both orthostichies of the secondary shoot. Connections between the bunch and primary leaves in the opposite orthostichy are relatively uncommon. The challenge for future research is to determine the degree to which these connections are functional under normal physiological conditions.",
keywords = "Cluster, Fruit, Gamma camera, Scintigraphy, Vascular transport",
author = "Simon Clarke and Suzy Rogiers and Geoffrey Currie",
note = "Includes bibliographical references.",
year = "2014",
month = "3",
doi = "10.1016/j.scienta.2014.01.041",
language = "English",
volume = "168",
pages = "229--233",
journal = "Scientia Horticulturae",
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Sectoriality in xylem connections between the bunch and leaves of the grapevine (Vitis vinifera) shoot. / Clarke, Simon; Rogiers, Suzy; Currie, Geoffrey.

In: Scientia Horticulturae, Vol. 168, 03.2014, p. 229-233.

Research output: Contribution to journalArticle

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T1 - Sectoriality in xylem connections between the bunch and leaves of the grapevine (Vitis vinifera) shoot

AU - Clarke, Simon

AU - Rogiers, Suzy

AU - Currie, Geoffrey

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AB - It is not clear how the xylem of a plant organ with a low transpiration rate, such as the grapevine (Vitis vinifera L.) bunch, is anatomically linked to surrounding leaves. The aim was to test the hypothesis that xylem connections to the grapevine bunch are sectorial using an apoplastic dye and a radioactive membrane-permeable nutrient analogue. The transport of eosin and pertechnetate (99mTcO4 -) revealed that bunches bearing unripe berries have xylem connections with primary leaves located on the same side of the shoot (common orthostichy) as the bunch. These connections also exist with secondary shoots arising from axillary buds in the same orthostichy as the bunch. These connections can include leaves in both orthostichies of the secondary shoot. Connections between the bunch and primary leaves in the opposite orthostichy are relatively uncommon. The challenge for future research is to determine the degree to which these connections are functional under normal physiological conditions.

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KW - Fruit

KW - Gamma camera

KW - Scintigraphy

KW - Vascular transport

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