Grapevine Anatomy as a Possible Determinant of Isohydric or Anisohydric Behavior

A comparison of root and shoot hydraulics, aquaporin expression and leaf gas exchange between two grapevine cultivars reveals differences in hydraulic control mediated by aquaporins

“…Schultz concluded that Grenache was more isohydric than Syrah as a result of stronger control over gs and Kleaf. Grapevine has since served as an important model plant to study iso/anisohydric behaviours and several studies have used the cultivars Grenache and Syrah as models for isohydric and anisohydric behaviour, respectively (Coupel-Ledru et al, 2014, Coupel-Ledru et al, 2017, Gerzon et al, 2015, Prieto et al, 2010, Scharwies & Tyerman, 2016, Schultz, 2003, Soar et al, 2006.…”

The Rate of Water Loss in Relation to Internodes Position and Wood Maturity in Vine Chords

“…Samples were taken from the vine experimental plots of BUSAMV Timisoara. The canes were analyzed over the entire length (19 internodes; IN [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] ), from each internode being extracted samples, which have been subjected to drying under controlled conditions. The rate of water loss, and associated parameters, was made with a infrared thermobalance (AXIS, ATS 60 Model), with an accuracy of ± 0.001g.…”

“…Hochberg et al (2013) based on their studies, found that isohidric vine cultivars presents higher photosynthetic efficiency and respiration rate in water stress conditions compared to anisohidrice cultivars. McCarthy et al (2006) and Gerzon et al (2015) have found that the "Shiraz" cultivar presented a more vigorous response to water deficit, which was manifested by a process of vegetative growth and defoliation slightly lower compared with "Grenache" cultivar. Analysis of anatomical architecture of the two vines cultivars, showed that "Grenache" have a larger diameter of conductive vessels (xylem), greater hydraulic conductivity and greater density of stomata than "Shiraz" (Schultz, 2003;Gerzon et al, 2015).…”

“…McCarthy et al (2006) and Gerzon et al (2015) have found that the "Shiraz" cultivar presented a more vigorous response to water deficit, which was manifested by a process of vegetative growth and defoliation slightly lower compared with "Grenache" cultivar. Analysis of anatomical architecture of the two vines cultivars, showed that "Grenache" have a larger diameter of conductive vessels (xylem), greater hydraulic conductivity and greater density of stomata than "Shiraz" (Schultz, 2003;Gerzon et al, 2015). It was considered that isohidric and anisohidric strategies may not be the result of distinct mechanisms, but SALA & DOBREI rather a response, an adaptation of plants well defined in time.…”

“…The biological material was represented by grape cultivar Burgund mare, to which were analyzed individually all internodes distributed on the chord length (internodes number IN [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] ). The rate of water loss and associated parameters (maximum rate of water loss -RWL Max , total drying time -T, time to achieve RWL Max -t RWLMax ) were determined from the Burgund mare vine cultivar, in controlled condition.…”