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Effect of Postharvest Defoliation on Carbon and Nitrogen Resources of High-Yielding Sauvignon blanc Grapevines

Marc M. Greven, Sue M. Neal, D. Stuart Tustin, Helen Boldingh, Jeff Bennett, Maria Carmo Vasconcelos
Am J Enol Vitic. July 2016 67: 315-326; published ahead of print April 07, 2016 ; DOI: 10.5344/ajev.2016.15081
Marc M. Greven
1New Zealand Institute for Plant and Food Research, Ltd., PO Box 845, Blenheim 7240, New Zealand
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  • For correspondence: marc.greven@plantandfood.co.nz
Sue M. Neal
1New Zealand Institute for Plant and Food Research, Ltd., PO Box 845, Blenheim 7240, New Zealand
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D. Stuart Tustin
2New Zealand Institute for Plant and Food Research, Ltd., Private Bag 1401, Havelock North 4157, New Zealand
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Helen Boldingh
3New Zealand Institute for Plant and Food Research, Ltd., Private Bag 3230, Waikato Mail Centre, Hamilton 3240, New Zealand
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Jeff Bennett
1New Zealand Institute for Plant and Food Research, Ltd., PO Box 845, Blenheim 7240, New Zealand
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Maria Carmo Vasconcelos
4Eastern Institute of Technology, Private Bag 120, Hawke’s Bay Mail Centre, Napier 4142, New Zealand.
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    Figure 1

    Marlborough long-term average (LTA: 1984 to 2014) climate summary with monthly precipitation (P-LTA), evapotranspiration (ETPLTA), daily average temperature (T-LTA), and radiation (MJ/m2).

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    Figure 2

    Effect of retaining 48 (48N) or 72 (72N) nodes at pruning time on Sauvignon blanc canopy performance during the 2009 season. (A) transpiration rate, (B) photosynthetic rate, (C) stomatal conductance to water vapor (gs), and (D) leaf chlorophyll concentration. Vertical bars represent ± SE. Flowering:12 Dec 2008; Veraison: 23 Feb 2009; Harvest: 15 April 2009.

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    Figure 3

    Effects of 2009 postharvest foliated (Fol) or defoliated (Defol) vines, and retaining 48 (48N) or 72 (72N) nodes at pruning time, on Sauvignon blanc canopy performance during 2010. (A, E) transpiration rate, (B, F) photosynthetic rate, (C, G) stomatal conductance (gs), and (D, H) leaf chlorophyll concentration. Vertical bars represent ± SE. Flowering: 18 Dec 2009; Veraison: 22 Feb 2010; Harvest: 20 April 2010.

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    Figure 4

    Effects of 2010 postharvest foliated (Fol) or defoliated (Defol) vines, and retaining 48 (48N) or 72 (72N) nodes at pruning time, on Sauvignon blanc canopy performance during 2011. (A, E) transpiration rate, (B, F) photosynthetic rate, (C, G) stomatal conductance (gs), and (D, H) leaf chlorophyll concentration. Vertical bars represent ± SE. Flowering: 13 Dec 2010; Veraison:15 Feb 2011; Harvest:19 April 2011.

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    Figure 5

    Total nitrogen (N) concentration in trunk and root tissue from Sauvignon blanc grapevines that were defoliated (Defol) or not (Fol) immediately after harvest (15 April 2009, 21 April 2010, and 19 April 2011). Error bars indicate ± SE.

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    Figure 6

    Total nitrogen (N) concentration measured in trunk and root tissue from Sauvignon blanc grapevines with 48 (48N) or 72 nodes (72N) retained at pruning, with error bars indicating ± SE.

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    Figure 7

    Total soluble carbohydrates (TSC) and starch in root and trunk tissue from Sauvignon blanc grapevines that were defoliated (Defol) or not (Fol) immediately after harvest (15 April 2009, 21 April 2010, and 19 April 2011), with error bars indicating ± SE.

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    Figure 8

    Total soluble carbohydrates (TSC) measured in root and trunk tissue from Sauvignon blanc grapevines with 48 or 72 nodes retained at pruning, with error bars indicating ± SE.

Tables

  • Figures
  • Table 1

    Fruit yield components, fruit composition, and vine growth characteristics of Sauvignon blanc pruned to 48 (48N) or 72 nodes (72N) per vine.

    Table 1
  • Table 2

    Fruit yield, yield components, and vine growth characteristics of Sauvignon blanc vines that were defoliated (Defol) or not defoliated (Fol) after harvest in 2009, 2010, and 2011.

    Table 2
  • Table 3

    Interactions of postharvest defoliation (Fol = foliated, Defol = defoliated) and pruning treatments (48 nodes = 48N and 72 nodes = 72N) for fruit yield, yield components, and vine growth characteristics of Sauvignon blanc in 2010 and 2011.

    Table 3
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Effect of Postharvest Defoliation on Carbon and Nitrogen Resources of High-Yielding Sauvignon blanc Grapevines
Marc M. Greven, Sue M. Neal, D. Stuart Tustin, Helen Boldingh, Jeff Bennett, Maria Carmo Vasconcelos
Am J Enol Vitic.  July 2016  67: 315-326;  published ahead of print April 07, 2016 ; DOI: 10.5344/ajev.2016.15081

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Effect of Postharvest Defoliation on Carbon and Nitrogen Resources of High-Yielding Sauvignon blanc Grapevines
Marc M. Greven, Sue M. Neal, D. Stuart Tustin, Helen Boldingh, Jeff Bennett, Maria Carmo Vasconcelos
Am J Enol Vitic.  July 2016  67: 315-326;  published ahead of print April 07, 2016 ; DOI: 10.5344/ajev.2016.15081
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