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| rdf:type
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| Description
| - The hydraulic architecture of a mature Quercus suber tree was evaluated through sap flow responses upon branch severing. The tree stem divided at the top into four large branches oriented NE, NW, SE and SW. Half of the branches (NW and SE) were cut one month earlier than the other ones (NE and SW). Sap flow responses to branch severing were recorded in branches, stem and roots with a high time resolution. Sap flow was monitored by the heat field deformation method (HFD). Single-point and multi-point sensors were used. Results showed that sectoriality was high in branches, stem and tap root, since sap flow predominantly responded to branch cuttings in the same orientation, in all xylem layers. All the other roots showed integrated connections to the crown: sap flow responded to all branch cuttings irrespective of orientation. This integrative feature of average sap flow in large roots resulted from preferential connections of outer xylem to the same side branch and of the inner xylem to the opposite branch. Results additionally allowed differentiating between rooting depth in sinker roots close to or distal from the stem. The former seem connected to groundwater and the latter to unsaturated/shallower soil layers. The hydraulic sectoriality in branches, stem and tap root may be regarded as an adaptive trait to water stress, by diminishing the risk of embolism spread. The integrated hydraulic structure of roots is advantageous under patchy soil conditions, but may allow the spread of root diseases. The HFD sap flow measuring technique proved extremely useful to characterize and calculate xylem flux connectivity between branches, stem and roots of the studied Q. suber tree. It provided a complete picture of the hydraulic architecture of a large tree, which is uncommon in the literature.
- The hydraulic architecture of a mature Quercus suber tree was evaluated through sap flow responses upon branch severing. The tree stem divided at the top into four large branches oriented NE, NW, SE and SW. Half of the branches (NW and SE) were cut one month earlier than the other ones (NE and SW). Sap flow responses to branch severing were recorded in branches, stem and roots with a high time resolution. Sap flow was monitored by the heat field deformation method (HFD). Single-point and multi-point sensors were used. Results showed that sectoriality was high in branches, stem and tap root, since sap flow predominantly responded to branch cuttings in the same orientation, in all xylem layers. All the other roots showed integrated connections to the crown: sap flow responded to all branch cuttings irrespective of orientation. This integrative feature of average sap flow in large roots resulted from preferential connections of outer xylem to the same side branch and of the inner xylem to the opposite branch. Results additionally allowed differentiating between rooting depth in sinker roots close to or distal from the stem. The former seem connected to groundwater and the latter to unsaturated/shallower soil layers. The hydraulic sectoriality in branches, stem and tap root may be regarded as an adaptive trait to water stress, by diminishing the risk of embolism spread. The integrated hydraulic structure of roots is advantageous under patchy soil conditions, but may allow the spread of root diseases. The HFD sap flow measuring technique proved extremely useful to characterize and calculate xylem flux connectivity between branches, stem and roots of the studied Q. suber tree. It provided a complete picture of the hydraulic architecture of a large tree, which is uncommon in the literature. (en)
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| Title
| - Hydraulic connectivity from roots to branches depicted through sap flow: analysis on a Quercus suber tree
- Hydraulic connectivity from roots to branches depicted through sap flow: analysis on a Quercus suber tree (en)
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| skos:prefLabel
| - Hydraulic connectivity from roots to branches depicted through sap flow: analysis on a Quercus suber tree
- Hydraulic connectivity from roots to branches depicted through sap flow: analysis on a Quercus suber tree (en)
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| skos:notation
| - RIV/62156489:43410/12:00174555!RIV12-MSM-43410___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/62156489:43410/12:00174555
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - xylem flux distribution; connectivity index; hydraulic integration (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - AU - Australské společenství
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Čermák, Jan
- Nadyezhdina, Naděžda
- David, Jorge
- David, Teresa
- Nadyezhdin, Valeriy
- Pinto, Clara
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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