Effects of fruit load on partitioning of and , respiration, and growth of grapevine roots at different fruit stages

Morinaga, Kunihisa; Imai, Shunji; Yakushiji, Hiroshi; Koshita, Yoshiko

doi:10.1016/s0304-4238(02)00199-1

Cited by 49 publications

(49 citation statements)

References 29 publications

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“…The development of a grape inflorescence depends on the presence of carbohydrates, which originate from reserves, leaves or the inflorescence itself (Morinaga et al 2003, Vasconcelos et al 2009, Vaillant-Gaveau et al 2011. During flowering, the inflorescence generates a significant amount of new assimilated carbon for itself, but also a surplus that is distributed to the growing leaves (Lebon et al 2008, Palliotti et al 2010, Vaillant-Gaveau et al 2011.…”

Section: Discussionmentioning

confidence: 99%

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Acimovic

Tozzini

Green

et al. 2016

Australian Journal of Grape and Wine Research

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Background and Aims: Early defoliation has been proposed as a tool to reduce bunch susceptibility to fungal infections through a reduction in bunch compactness. This research aims to determine the desired level of defoliation producing looser bunches and to investigate the impact of the application of early defoliation on Pinot Noir vines under cool climate conditions. Methods and Results: We applied leaf removal treatments at full flowering or EL-20 phenological stage on Pinot Noir in 2 consecutive years using five levels of defoliation: no leaves removed, and leaves removed from four, six, eight and ten basal nodes. The effects on fruitset, bunch morphology, fruit chemistry, yield and rot severity were recorded. We identified the defoliation of eight basal nodes as the threshold resulting in significantly lower fruitset. The removal of eight or ten leaves reduced bunch compactness but did not alter the proportion of rot. Finally, fruit composition at harvest of the treated vines was found to be improved compared with that of the control vines. Conclusions: The defoliation of six to eight basal nodes at full flowering can regulate fruitset and bunch compactness in Pinot Noir under cool climate conditions. Application over 2 years showed no adverse effects on bud fruitfulness or vine performance the following year. Significance of the Study: Early leaf removal can be an efficient tool to alter bunch architecture, yield and fruit composition without impacting vine health.

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Section: Discussionmentioning

confidence: 99%

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Acimovic

Tozzini

Green

et al. 2016

Australian Journal of Grape and Wine Research

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“…, 1978). However, as fuits are highly competitive with root growth in V. vinifera (Rodríguez‐Lovelle & Gaudillère, 2002), C becomes available to the latter plant part towards the final fruit ripening stage, when fruit growth declines, as observed in several deciduous woody crops (Buwalda & Smith, 1987; Palmer, 1992; Morinaga et al. , 2003; Eissenstat et al.…”

Section: Discussionmentioning

confidence: 99%

“…Seasonal patterns of root growth and its relationship to above‐ground growth have been studied for cultivated Vitis species (Bates et al. , 2002; Morinaga et al. , 2003; Comas et al.…”

Section: Introductionmentioning

confidence: 99%

Seasonal fluctuations inVitis viniferaroot respiration in the field

et al. 2011

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Summary• We studied the seasonal fluctuation of soil respiration (R S ), and its rootdependent (R R ) and basal (R B ) components, in a Vitis vinifera (Chardonnay) vineyard.• The R S components were estimated through independent field methods (y-intercept and trenching) and modeled on the basis of a Q 10 response to soil temperature, and fine and coarse root respiration coefficients. The effect of assimilate availability on R R was assessed through a trunk girdling treatment.• The apparent Q 10 for R R was twice that of R B (3.5 vs 1.6) and increased linearly with increasing vine root biomass. The fastest R R of fine roots was during rapid fruit growth and the fastest R R of coarse roots was immediately following fruit development. R S was estimated at 32.6 kg ha )1 d )1 (69% as a result of R R ) for the hottest month and at 7.6 kg ha )1 d )1 (18% as a result of R R ) during winter dormancy. Annual R S was low compared with other natural and cultivated ecosystems: 5.4 Mg ha )1 (46% as a result of R R ).• Our estimates of annual vineyard R S are the first for any horticultural crop and suggest that the assumption that they are similar to those of annual crops or forest trees might lead to an overestimation.

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“…However, other factors can also aVect trunk growth such as the phenological stage (van Zyl 1984) and crop load (Morinaga et al 2003), mainly because of their eVect on carbon partitioning (Wardlaw 1990). Also, during those phenological periods when the trunk is not growing TGR cannot be used as an indicator of plant water status.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of grapevine water status from trunk diameter variations

Intrigliolo

Castel

2007

Irrig Sci

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We evaluated the usefulness of short-term trunk diameter variations (TDV) as water stress indicator in Weld-grown grapevines cv. Tempranillo. Two indices were calculated from TDV, maximum daily trunk shrinkage (MDS), and trunk growth rate (TGR). The seasonal evolution of both indicators was compared with occasional determinations of pre-dawn leaf water potential and stem water potential, measured at early morning ( s em ) and at midday ( s md ) in irrigated and non-irrigated vines. In the second season, the eVect of crop load on the vine water status indicators was also studied. Crop load did not aVect either the vine water relations or the TDV. All water potential determinations had much lower variability and were more sensitive than both MDS and TGR to water restrictions. The ability of both indices to detect plant water stress varied largely depending upon the phenological period. In fact, MDS and TGR were only able to detect vine water stress during a short period of time before veraison. During this period, TGR was linearly related to both s em and s md , while for MDS a curvilinear, quadratic equation, better described the relationship with plant water status. After veraison no apparent relationship existed between plant water status and MDS or TGR. Hence, our results question the practical use of both MDS and TGR as variables to automate irrigation scheduling for grapevine.

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Effects of fruit load on partitioning of and , respiration, and growth of grapevine roots at different fruit stages

Cited by 49 publications

References 29 publications

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Seasonal fluctuations inVitis viniferaroot respiration in the field

Evaluation of grapevine water status from trunk diameter variations

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