Agronomical and Chemical Effects of the Timing of Cluster Thinning on Pinot Noir (Clone 115) Grapes and Wines

Mawdsley, Paul F.W.; Peterson, Jean C. Dodson; Casassa, L. Federico

doi:10.3390/fermentation4030060

Cited by 14 publications

(15 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2017, the optimal climatic conditions (i.e. no water restriction, suitable temperature and sufficient luminosity) were conducive to proper fruit maturation in all treatments, as explained by Mawdsley et al (2018). The d 13 C values indicate that the vines had sufficient water supply (Van Leeuwen et al 2009).…”

Section: No Impact Of Crop Load On Fruit N Concentration or Maturationmentioning

confidence: 92%

“…limiting crop load by removing a proportion of fruits early in the season) has become a common practice to increase the source : sink ratio and enhance fruit maturation. Several studies have explained the impact of crop thinning on fruit composition, considering the leaf : fruit ratio as an indicator of balanced plants (Jackson and Lombard 1993;Keller et al 2005;Mawdsley et al 2018;Wang et al 2018). In grapevines, a sufficient leaf : fruit ratio (above~1 m 2 of exposed leaf area per kg of fruit) promotes fruit development and maturation by providing a nonlimiting source of photosynthetic carbohydrates (Kliewer and Dokoozlian 2005;Zufferey et al 2015).…”

Section: Impact Of Crop Load On Nitrogen Uptake and Reserve Mobilisatmentioning

confidence: 99%

See 1 more Smart Citation

Impact of crop load on nitrogen uptake and reserve mobilisation in Vitis vinifera

Verdenal

Spangenberg

Zufferey

et al. 2020

Functional Plant Biol.

View full text Add to dashboard Cite

Nitrogen deficit affects both crop production and composition, particularly in crops requiring an optimal fruit N content for aroma development. The adaptation of cultural practices to improve N use efficiency (NUE) (i.e. N uptake, assimilation and partitioning) is a priority for the sustainable production of high-quality crops. A trial was set on potted grapevines (Vitis vinifera L. cv. Chasselas) to investigate the potential of crop limitation (via bunch thinning) to control plant NUE and ultimately fruit N composition at harvest. A large crop load gradient was imposed by bunch thinning (0.5–2.5 kg m–2) and N traceability in the plant was realised with an isotope-labelling method (10 atom % 15N foliar urea). The results indicate that the mobilisation of root reserves plays a major role in the balance of fruit N content. Fertiliser N uptake and assimilation appeared to be strongly stimulated by high-yielding conditions. Fertilisation largely contributed to fulfilling the high fruit N demand while limiting the mobilisation of root reserves under high yield conditions. Plants were able to modulate root N reserve mobilisation and fertiliser N uptake in function of the crop load, thus maintaining a uniform N concentration in fruits. However, the fruit free amino N profile was modified, which potentially altered the fruit aromas. These findings highlight the great capacity of plants to adapt their N metabolism to constraints, crop thinning in this case. This confirms the possibility of monitoring NUE by adapting cultural practices.

show abstract

Section: No Impact Of Crop Load On Fruit N Concentration or Maturationmentioning

confidence: 92%

Section: Impact Of Crop Load On Nitrogen Uptake and Reserve Mobilisatmentioning

confidence: 99%

Impact of crop load on nitrogen uptake and reserve mobilisation in Vitis vinifera

Verdenal

Spangenberg

Zufferey

et al. 2020

Functional Plant Biol.

View full text Add to dashboard Cite

show abstract

“…Production is at a maximum when the supply of resources equals or exceeds plant demand (Lawlor, 2002). In fact, several studies have shown an inconsistent impact of bunch thinning on fruit composition, highlighting the prevailing role of the leaf-to-fruit ratio (Jackson and Lombard, 1993;Keller et al, 2005;Parker et al, 2014;Parker et al, 2015;Verdenal et al, 2016b;Mawdsley et al, 2018;Wang et al, 2018). Indeed, bunch thinning may not alter the leaf area-to-fruit weight ratio enough to overcome carbon supply limitations (Reeve et al, 2018).…”

Section: Leaf-to-fruit Ratiomentioning

confidence: 99%

Understanding and managing nitrogen nutrition in grapevine: a review

et al. 2021

View full text Add to dashboard Cite

This review addresses the role of nitrogen (N) in vine balance and grape composition. It offers an integrative approach to managing grapevine N nutrition. Keeping in mind that N excess is just as detrimental to wine quality as N depletion, the control of grapevine N status, and ultimately must N composition, is critical for high-quality grape production. N fertilisation has been intensively used in the past century, despite plants absorbing only 30 to 40 % of applied N. By adapting plant material, soil management and vine balance to environmental conditions, it would be possible for grape growers to improve plant N use efficiency and minimise N input in the vineyard. Vineyard N management is a complex exercise involving a search for a balance between controlling vigour, optimising grape composition, regulating production costs and limiting pollution. The first part of this review describes grapevine N metabolism from root N uptake to vine development and grape ripening, including the formation of grape aroma compounds. The advantages and limits of methods available for measuring plant N status are addressed. The second part focuses on the parameters that influence grapevine N metabolism, distinguishing the impacts of environmental factors from those of vineyard management practices. Areas for further research are also identified.

show abstract

“…fruit quantity per plant) may be regulated downward via crop thinning, which consists of removing grapes before the onset of ripening in order to promote the maturation of the remaining fruit. Crop thinning, however, does not consistently improve fruit composition or aroma development (Keller et al 2005, Mawdsley et al 2018, Wang et al 2018, Bubola et al 2020, Verdenal et al 2020). Alem et al (2021) further demonstrated that crop thinning generally decreases the quantity of most carbon (C) compounds (i.e.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen dynamics and fertilisation use efficiency: carry‐over effect of crop limitation

Verdenal

Spangenberg

Dienes-Nagy

et al. 2021

Aust J Grape and Wine Res

View full text Add to dashboard Cite

Background and Aims: Knowing the impact of cultural practices on nitrogen (N) dynamics in perennial crops is critical to promote N use efficiency. This study focused on the impact of crop regulation on the plant N dynamics, on the fruit N composition, and on the N fertilisation use efficiency. Methods and Results: A large crop load gradient was set in a homogeneous plot of the grape cultivar Chasselas. Fertilisation in the form of 15 N-labelled foliar urea allowed the measurement of N uptake and partitioning among plant fractions. Dry mass, carbon, and N dynamics were assessed over two consecutive seasons. Crop regulation did not affect grape N concentration at harvest. Both N uptake and root N mobilisation were reduced in response to crop regulation. Fertilisation efficiency was higher under high-yield conditions in terms of N uptake and grape N accumulation. The carry-over effects of crop regulation in the following year were highlighted. Conclusions: Crop regulation strongly affects the overall plant N cycle, that is, uptake, distribution and release. Crop regulation improves must sugar concentration at harvest, while N concentration remained unchanged. The efficiency of N fertilisation varies greatly with crop load, which limits the interest of fertilisation under low-yield conditions. Significance of the Study: These results contribute to the development of accurate nutrition models and sustainable cultural practices.

show abstract

Agronomical and Chemical Effects of the Timing of Cluster Thinning on Pinot Noir (Clone 115) Grapes and Wines

Cited by 14 publications

References 72 publications

Impact of crop load on nitrogen uptake and reserve mobilisation in Vitis vinifera

Impact of crop load on nitrogen uptake and reserve mobilisation in Vitis vinifera

Understanding and managing nitrogen nutrition in grapevine: a review

Nitrogen dynamics and fertilisation use efficiency: carry‐over effect of crop limitation

Contact Info

Product

Resources

About