Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines
The impact of permanent cordon training systems on the vasculature of grapevines has to date, not been investigated in depth. This study used optical microscopy (stereo microscope) and X-ray microtomography (micro-CT) to quantify the morphological properties of the xylem conduits of cane samples col...
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| Format: | Article |
| Language: | English |
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International Viticulture and Enology Society
2023-03-01
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| Series: | OENO One |
| Subjects: | |
| Online Access: | https://oeno-one.eu/article/view/7236 |
| _version_ | 1797854976800718848 |
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| author | Patrick O'Brien Roberta De Bei Cassandra Collins |
| author_facet | Patrick O'Brien Roberta De Bei Cassandra Collins |
| author_sort | Patrick O'Brien |
| collection | DOAJ |
| description | The impact of permanent cordon training systems on the vasculature of grapevines has to date, not been investigated in depth. This study used optical microscopy (stereo microscope) and X-ray microtomography (micro-CT) to quantify the morphological properties of the xylem conduits of cane samples collected from the distal region of cordons, which had been established using four different training techniques. These treatments included one system where the cordon was wrapped very tightly around the cordon wire, a practice that is common in Australia and some other countries. The study also used micro-CT to observe the cordons directly, providing clear insight into the effects of the training methods on the localised structure of the cordons themselves. While the cordons in this study were only four years old at the time of their scanning and 3D reconstruction, significant differences were found between the different training methods. At one of the two trial sites, cordons which were wrapped tightly around the cordon wire had a significantly lower xylem conduit volume in relation to total cordon volume than those which had been woven through a plastic clip system centred between parallel cordon wires. The xylem conduits of woven cordons, in turn, had a lower volume than those which had been trained on top of the cordon wire and secured in place with plastic ties. Cordons which had been wrapped tightly around the cordon wire also had significantly thinner vessels and fewer connections per unit volume between vessels than other treatments at this site, as well as a lower theoretical specific hydraulic conductivity (Ks). No definitive patterns of differences between treatments were observed in the morphological properties of cane samples, either by stereo microscope or micro-CT. The results of this study suggest that the choice of cordon training method may have a notable impact on the capacity of the xylem for normal hydraulic function. Training methods which constrict the vasculature of the cordon, in particular tightly wrapping the cordon around the cordon wire, may have long-term negative outcomes on cordon health and productivity. |
| first_indexed | 2024-04-09T20:16:05Z |
| format | Article |
| id | doaj.art-1726493937754c519228f0fe0b249eb8 |
| institution | Directory Open Access Journal |
| issn | 2494-1271 |
| language | English |
| last_indexed | 2024-04-09T20:16:05Z |
| publishDate | 2023-03-01 |
| publisher | International Viticulture and Enology Society |
| record_format | Article |
| series | OENO One |
| spelling | doaj.art-1726493937754c519228f0fe0b249eb82023-03-31T07:38:40ZengInternational Viticulture and Enology SocietyOENO One2494-12712023-03-0157110.20870/oeno-one.2023.57.1.7236Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevinesPatrick O'Brien0Roberta De Bei1Cassandra Collins2The University of Adelaide, School of Agriculture, Food and Wine, Waite Research Institute, PMB 1 Glen Osmond, 5064 South AustraliaThe University of Adelaide, School of Agriculture, Food and Wine, Waite Research Institute, PMB 1 Glen Osmond, 5064 South AustraliaThe University of Adelaide, School of Agriculture, Food and Wine, Waite Research Institute, PMB 1 Glen Osmond, 5064 South Australia - ARC Industrial Transformation Training Centre for Innovative Wine Production, Waite Research Institute, PMB 1 Glen Osmond, 5064 South AustraliaThe impact of permanent cordon training systems on the vasculature of grapevines has to date, not been investigated in depth. This study used optical microscopy (stereo microscope) and X-ray microtomography (micro-CT) to quantify the morphological properties of the xylem conduits of cane samples collected from the distal region of cordons, which had been established using four different training techniques. These treatments included one system where the cordon was wrapped very tightly around the cordon wire, a practice that is common in Australia and some other countries. The study also used micro-CT to observe the cordons directly, providing clear insight into the effects of the training methods on the localised structure of the cordons themselves. While the cordons in this study were only four years old at the time of their scanning and 3D reconstruction, significant differences were found between the different training methods. At one of the two trial sites, cordons which were wrapped tightly around the cordon wire had a significantly lower xylem conduit volume in relation to total cordon volume than those which had been woven through a plastic clip system centred between parallel cordon wires. The xylem conduits of woven cordons, in turn, had a lower volume than those which had been trained on top of the cordon wire and secured in place with plastic ties. Cordons which had been wrapped tightly around the cordon wire also had significantly thinner vessels and fewer connections per unit volume between vessels than other treatments at this site, as well as a lower theoretical specific hydraulic conductivity (Ks). No definitive patterns of differences between treatments were observed in the morphological properties of cane samples, either by stereo microscope or micro-CT. The results of this study suggest that the choice of cordon training method may have a notable impact on the capacity of the xylem for normal hydraulic function. Training methods which constrict the vasculature of the cordon, in particular tightly wrapping the cordon around the cordon wire, may have long-term negative outcomes on cordon health and productivity.https://oeno-one.eu/article/view/7236grapevineconstrictionwater statusxylemhydraulic conductivity |
| spellingShingle | Patrick O'Brien Roberta De Bei Cassandra Collins Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines OENO One grapevine constriction water status xylem hydraulic conductivity |
| title | Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines |
| title_full | Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines |
| title_fullStr | Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines |
| title_full_unstemmed | Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines |
| title_short | Micro-CT constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines |
| title_sort | micro ct constitutes a valuable tool in assessing the impact of cordon constriction on the vascular morphology of grapevines |
| topic | grapevine constriction water status xylem hydraulic conductivity |
| url | https://oeno-one.eu/article/view/7236 |
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