Effects of three esca-associated fungi on Vitis vinifera L.: V. Changes in the chemical and biological profile of xylem sap from diseased cv. Sangiovese vines

2007 ◽  
Vol 71 (4-6) ◽  
pp. 210-229 ◽  
Author(s):  
Giovanni Bruno ◽  
Lorenzo Sparapano
Keyword(s):  
Vitis Vinifera ◽  
Xylem Sap ◽  
Vitis Vinifera L ◽  
Biological Profile

Gradients in stomatal conductance, xylem sap ABA and bulk leaf ABA along canes of Vitis vinifera cv. Shiraz: molecular and physiological studies investigating their source

2004 ◽  
Vol 31 (6) ◽  
pp. 659 ◽  
Author(s):  
Christopher J. Soar ◽  
Jim Speirs ◽  
Suzanne M. Maffei ◽  
Brian R. Loveys
Keyword(s):  
Stomatal Conductance ◽  
Vitis Vinifera ◽  
Biosynthetic Pathway ◽  
Xylem Sap ◽  
Leaf Age ◽  
Vitis Vinifera L ◽  
Local Synthesis ◽  
Cdna Sequences ◽  
Genes Encoding ◽  
Induced Changes

Gradients were observed in xylem sap ABA and in stomatal conductance along canes of Vitis vinifera L. cv. Shiraz. To investigate the source of the ABA responsible for these gradients a series of girdling and decapitation experiments were carried out. Leaf stomatal conductance and bulk ABA of leaves and apices were measured in control plants and in response to apex removal or girdling. Gradients in leaf ABA were observed over the first eight expanded leaves of field-grown Shiraz, with higher concentrations of ABA observed towards the apex. Gradients in stomatal conductance that correlated negatively with the concentration of ABA in the leaf ([ABA]leaf) were also observed over the first eight leaves. No significant effect of decapitation was observed on either leaf ABA or stomatal conductance except for the leaf immediately below the apex where a transient increase in [ABA]leaf was observed after 24 h with no corresponding decrease in conductance. Girdling resulted in an increase in [ABA]leaf in leaves distal to the girdle without the corresponding effect on conductance. These effects were further studied at the level of gene activity. To facilitate this, gene sequences encoding two key enzymes involved in the biosynthetic pathway of ABA in grape, zeaxanthin epoxidase (Zep) and 9-cis-epoxycarotenoid dioxygenase (NCED), were isolated and characterised. The cDNA sequences were used as probes to measure the abundances of their respective mRNAs in the leaf and apical material. Levels of expression of one of the two genes encoding NCED, VvNCED1, reflected the gradients in [ABA]leaf in control vines, however treatment-induced changes in ABA were not always associated with corresponding changes in VvNCED1 expression. The abundances of both the VvNCED2 mRNA and Zep mRNA increased with increasing leaf age and did not appear to be associated with either the [ABA]leaf or the expression of VvNCED1. Our results indicate that observed gradients in g s are correlated with [ABA] gradients in mature leaves and xylem sap and that these [ABA] gradients are not derived directly from the apical tissues but, at least partially, from local synthesis.

Metabolic and biological profile of autochthonous Vitis vinifera L. ecotypes

2015 ◽  
Vol 6 (5) ◽  
pp. 1526-1538 ◽  
Author(s):  
Stefania Impei ◽  
Angelo Gismondi ◽  
Lorena Canuti ◽  
Antonella Canini
Keyword(s):  
Phenolic Compounds ◽  
Vitis Vinifera ◽  
Plant Species ◽  
Health Benefits ◽  
Vitis Vinifera L ◽  
Biological Profile

Vitis viniferaL. is a plant species rich in phenolic compounds that are usually associated with the health benefits of wine and grape consumption in the diet.

scholarly journals Xylem network connectivity and embolism spread in grapevine(Vitis vinifera L.)

2021 ◽  
Author(s):  
Jay Wason ◽  
Martin Bouda ◽  
Eric F Lee ◽  
Andrew J McElrone ◽  
Ronald J Phillips ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Network Performance ◽  
Xylem Sap ◽  
Three Dimensional ◽  
Network Connectivity ◽  
Vitis Vinifera L ◽  
Network Organization ◽  
Micro Computed Tomography ◽  
Stem Resistance ◽  
Pit Membrane

Abstract Xylem networks are vulnerable to the formation and spread of gas embolisms that reduce water transport. Embolisms spread through interconduit pits, but the three-dimensional (3D) complexity and scale of xylem networks means that the functional implications of intervessel connections are not well understood. Here, xylem networks of grapevine (Vitis vinifera L.) were reconstructed from 3D high-resolution X-ray micro-computed tomography (microCT) images. Xylem network performance was then modeled to simulate loss of hydraulic conductivity under increasingly negative xylem sap pressure simulating drought stress conditions. We also considered the sensitivity of xylem network performance to changes in key network parameters. We found that the mean pit area per intervessel connection was constant across 10 networks from three, 1.5-m stem segments, but short (0.5 cm) segments fail to capture complete network connectivity. Simulations showed that network organization imparted additional resistance to embolism spread beyond the air-seeding threshold of pit membranes. Xylem network vulnerability to embolism spread was most sensitive to variation in the number and location of vessels that were initially embolized and pit membrane vulnerability. Our results show that xylem network organization can increase stem resistance to embolism spread by 40% (0.66 MPa) and challenge the notion that a single embolism can spread rapidly throughout an entire xylem network.

Resveratrol oligomers from Vitis Vinifera L. stems

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
H Amira-Guebailia ◽  
T Richard ◽  
S Rouaiguia ◽  
P Waffo Tueguo ◽  
JC Delaunay ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L

Biotransformation of 4-hydroxybenzoic acid in the rhizosphere of grapevine (Vitis vinifera L.)

2017 ◽  
Vol 40 (1) ◽  
pp. 95-102 ◽  
Author(s):  
B. Wang ◽  
T. Zhou1 ◽  
K. Li ◽  
X.W. Guo ◽  
Y.S. Guo ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L ◽  
Hydroxybenzoic Acid

Isolation and characterization of cell walls from the mesocarp of mature grape berries (Vitis vinifera)

2020 ◽  
Author(s):  
KJ Nunan ◽  
Ian Sims ◽  
A Bacic ◽  
SP Robinson ◽  
GB Fincher
Keyword(s):  
Vitis Vinifera ◽  
Cell Walls ◽  
Vascular Tissue ◽  
Compositional Analysis ◽  
Water Soluble ◽  
Vitis Vinifera L ◽  
Nylon Mesh ◽  
Cytoplasmic Material ◽  
Isolation And Characterization ◽  
Tissue Homogenates

Cell walls have been isolated from the mesocarp of mature grape (Vitis vinifera L.) berries. Tissue homogenates were suspended in 80% (v/v) ethanol to minimise the loss of water-soluble wall components and wet-sieved on nylon mesh to remove cytoplasmic material. The cell wall fragments retained on the sieve were subsequently treated with buffered phenol at pH 7.0, to inactivate any wall-bound enzymes and to dislodge small amounts of cytoplasmic proteins that adhered to the walls. Finally, the wall preparation was washed with chloroform/methanol (1:1, v/v) to remove lipids and dried by solvent exchange. Scanning electron microscopy showed that the wall preparation was essentially free of vascular tissue and adventitious protein of cytoplasmic origin. Compositional analysis showed that the walls consisted of approximately 90% by weight of polysaccharide and less than 10% protein. The protein component of the walls was shown to be rich in arginine and hydroxyproline residues. Cellulose and polygalacturonans were the major constituents, and each accounted for 30-40% by weight of the polysaccharide component of the walls. Substantial varietal differences were observed in the relative abundance of these two polysaccharides. Xyloglucans constituted approximately 10% of the polysaccharide fraction and the remainder was made up of smaller amounts of mannans, heteroxylans, arabinans and galactans.

Sistemas atmosféricos em Santa Catarina no período da maturação à colheita de videira Cabernet Sauvignon

Agrometeoros ◽  
2018 ◽  
Vol 25 (2) ◽  
Author(s):  
Cristina Pandolfo ◽  
Marilene De Lima ◽  
Angelo Mendes Massignam ◽  
Aparecido Lima da Silva ◽  
Luiz Albano Hammes
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L ◽  
Cabernet Sauvignon ◽  
Santa Catarina

Os sistemas atmosféricos exercem um papel significativo no clima de uma região e poucos trabalhos determinaram os impactos dos sistemas atmosféricos no de­senvolvimento e na produção de videira. Os objetivos deste trabalho foram deter­minar a frequência de ocorrência dos sistemas atmosféricos durante o período da maturação à colheita da videira (Vitis vinifera L.) var. Cabernet Sauvignon para as duas regiões produtoras de Santa Catarina em diferentes safras e determinar a as­sociação entre a ocorrência dos sistemas atmosféricos e as regiões produtoras e as safras. Os sistemas atmosféricos foram identificados durante as safras de 2005/2006 à 2008/2009. Os municípios de Água Doce e Campos Novos foram escolhidos para re­presentar a região produtora 1 e os municípios de Bom Retiro e São Joaquim para re­presentar a região produtora 2. As frequências de ocorrências dos sistemas atmosfé­ricos durante o período da maturação à colheita de videira são muito semelhantes entre as regiões, somente houve diferença na frequência de ocorrência do sistema jato subtropical entre regiões. Houve uma diferença significativa da ocorrência da frequência dos sistemas atmosféricos entre safras.

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