Solute Transport into Shiraz Berries during development and late-ripening shrinkage

Suzy Rogiers, Dennis Greer, Jo Hatfield, Beverley Orchard, Markus Keller

Research output: Contribution to journalArticle

50 Citations (Scopus)
23 Downloads (Pure)

Abstract

Shiraz berries commonly lose weight during the later part of ripening and loss of vascular flows into the berry may be a contributing factor. Changes in flow through the vascular streams were assessed by monitoring the accumulation of potassium and calcium in berries at the preveraison, postveraison, and shrinkage stages of development. Potassium, a predominantly phloem-mobile element, accumulated most strongly postveraison and less strongly during the shrinkage phase. Calcium, a xylem-mobile element, accumulated strongly before veraison, but after veraison accumulation patterns were variable. Girdling and excision of pedicels to remove phloem before and at the postveraison stage of development resulted in smaller berries but also inhibited the accumulation of sugars, pigments, and potassium, but not calcium, into the berry. With an assumption of ongoing transpiration, late-ripening shrinkage may be attributed to decreased phloem flow into the berry.
Original languageEnglish
Pages (from-to)73-80
Number of pages8
JournalAmerican Journal of Enology and Viticulture
Volume57
Issue number1
Publication statusPublished - 2006

Fingerprint

shrinkage
small fruits
Fruit
ripening
Phloem
phloem
Potassium
potassium
Calcium
calcium
blood vessels
Blood Vessels
Xylem
girdling
pedicel
xylem
transpiration
pigments
sugars
Weights and Measures

Cite this

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abstract = "Shiraz berries commonly lose weight during the later part of ripening and loss of vascular flows into the berry may be a contributing factor. Changes in flow through the vascular streams were assessed by monitoring the accumulation of potassium and calcium in berries at the preveraison, postveraison, and shrinkage stages of development. Potassium, a predominantly phloem-mobile element, accumulated most strongly postveraison and less strongly during the shrinkage phase. Calcium, a xylem-mobile element, accumulated strongly before veraison, but after veraison accumulation patterns were variable. Girdling and excision of pedicels to remove phloem before and at the postveraison stage of development resulted in smaller berries but also inhibited the accumulation of sugars, pigments, and potassium, but not calcium, into the berry. With an assumption of ongoing transpiration, late-ripening shrinkage may be attributed to decreased phloem flow into the berry.",
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Solute Transport into Shiraz Berries during development and late-ripening shrinkage. / Rogiers, Suzy; Greer, Dennis; Hatfield, Jo; Orchard, Beverley; Keller, Markus.

In: American Journal of Enology and Viticulture, Vol. 57, No. 1, 2006, p. 73-80.

Research output: Contribution to journalArticle

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AU - Greer, Dennis

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AU - Orchard, Beverley

AU - Keller, Markus

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AB - Shiraz berries commonly lose weight during the later part of ripening and loss of vascular flows into the berry may be a contributing factor. Changes in flow through the vascular streams were assessed by monitoring the accumulation of potassium and calcium in berries at the preveraison, postveraison, and shrinkage stages of development. Potassium, a predominantly phloem-mobile element, accumulated most strongly postveraison and less strongly during the shrinkage phase. Calcium, a xylem-mobile element, accumulated strongly before veraison, but after veraison accumulation patterns were variable. Girdling and excision of pedicels to remove phloem before and at the postveraison stage of development resulted in smaller berries but also inhibited the accumulation of sugars, pigments, and potassium, but not calcium, into the berry. With an assumption of ongoing transpiration, late-ripening shrinkage may be attributed to decreased phloem flow into the berry.

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