scholarly journals Using SRuCT to define water transport capacity in Picea abies

2017 ◽  
Author(s):  
Silke Lautner ◽  
Claudia Lenz ◽  
Jörg U. Hammel ◽  
Julian Moosmann ◽  
Michael Kühn ◽  
...  
Keyword(s):  
Picea Abies ◽  
Water Transport ◽  
Transport Capacity

scholarly journals Janus Membrane with Novel Directional Water Transport Capacity for Efficient Atmospheric Water Capture

Nanoscale ◽  
2021 ◽  
Author(s):  
Jing Wu ◽  
Baona Ren ◽  
Haohong Pi ◽  
Xin Zhao ◽  
Miaomiao Hu ◽  
...  
Keyword(s):  
Fresh Water ◽  
Water Transport ◽  
Water Scarcity ◽  
Low Cost ◽  
Transport Capacity ◽  
Atmospheric Water ◽  
Human Survival ◽  
Survival And Development ◽  
Energy Independence

Fresh water scarcity becomes a crisis to human survival and development. Atmospheric water capture with remarkable advantages such as energy-independence, low-cost, etc., has been supposed as a promising way to...

Axial heterogeneity in the rat proximal convoluted tubule. I. Bicarbonate, chloride, and water transport

1984 ◽  
Vol 247 (5) ◽  
pp. F816-F821 ◽  
Author(s):  
F. Y. Liu ◽  
M. G. Cogan
Keyword(s):  
Proximal Tubule ◽  
Water Transport ◽  
Wistar Rats ◽  
Proximal Convoluted Tubule ◽  
Free Flow ◽  
Concentration Profiles ◽  
Transport Capacity ◽  
Water Reabsorption ◽  
Substrate Concentrations

To measure simultaneously the concentration profiles of bicarbonate, chloride and inulin along the length of the superficial proximal convoluted tubule, free-flow micropuncture measurements were made sequentially from the end-proximal tubule to Bowman's space in 10 tubules of hydropenic Munich-Wistar rats. Bicarbonate and volume reabsorption were 354 +/- 21 pmol X mm-1 X min-1 and 5.9 +/- 0.4 nl X mm-1 X min-1 in the first millimeter and fell progressively in the remaining 3.8 mm of tubule, averaging 83 +/- 4 pmol X mm-1 X min-1 and 2.3 +/- 0.5 nl X mm-1 X min-1, respectively. The values in the initial millimeter represents a high transport capacity since they exceed rates that have been observed when comparable or even higher mean luminal substrate concentrations were presented to the late proximal tubule. In contrast, chloride reabsorption was only 206 +/- 55 peq X mm-1 X min-1 in the first millimeter compared with a mean of 306 +/- 22 peq X mm-1 X min-1 in the rest of the tubule. In conclusion, there is substantial axial transport heterogeneity, with bicarbonate and water reabsorption higher but chloride reabsorption lower in the early compared with the late superficial proximal convoluted tubule.

scholarly journals Hypernodulating soybean mutant line nod4 lacking ‘Autoregulation of Nodulation’ (AON) has limited root-to-shoot water transport capacity

2019 ◽  
Vol 124 (6) ◽  
pp. 979-991 ◽  
Author(s):  
Emile Caroline Silva Lopes ◽  
Weverton Pereira Rodrigues ◽  
Katherine Ruas Fraga ◽  
José Altino Machado Filho ◽  
Jefferson Rangel da Silva ◽  
...  
Keyword(s):  
Plant Growth ◽  
Water Potential ◽  
Water Transport ◽  
Leaf Water Potential ◽  
Root Nodules ◽  
Leaf Water ◽  
Transport Capacity ◽  
N Content ◽  
Photosynthetic Rates ◽  
Root Conductance

AbstractBackground and AimsAlthough hypernodulating phenotype mutants of legumes, such as soybean, possess a high leaf N content, the large number of root nodules decreases carbohydrate availability for plant growth and seed yield. In addition, under conditions of high air vapour pressure deficit (VPD), hypernodulating plants show a limited capacity to replace water losses through transpiration, resulting in stomatal closure, and therefore decreased net photosynthetic rates. Here, we used hypernodulating (nod4) (282.33 ± 28.56 nodules per plant) and non-nodulating (nod139) (0 nodules per plant) soybean mutant lines to determine explicitly whether a large number of nodules reduces root hydraulic capacity, resulting in decreased stomatal conductance and net photosynthetic rates under high air VPD conditions.MethodsPlants were either inoculated or not inoculated with Bradyrhizobium diazoefficiens (strain BR 85, SEMIA 5080) to induce nitrogen-fixing root nodules (where possible). Absolute root conductance and root conductivity, plant growth, leaf water potential, gas exchange, chlorophyll a fluorescence, leaf ‘greenness’ [Soil Plant Analysis Development (SPAD) reading] and nitrogen content were measured 37 days after sowing.Key ResultsBesides the reduced growth of hypernodulating soybean mutant nod4, such plants showed decreased root capacity to supply leaf water demand as a consequence of their reduced root dry mass and root volume, which resulted in limited absolute root conductance and root conductivity normalized by leaf area. Thereby, reduced leaf water potential at 1300 h was observed, which contributed to depression of photosynthesis at midday associated with both stomatal and non-stomatal limitations.ConclusionsHypernodulated plants were more vulnerable to VPD increases due to their limited root-to-shoot water transport capacity. However, greater CO2 uptake caused by the high N content can be partly compensated by the stomatal limitation imposed by increased VPD conditions.

High temperature during the budswell phase of grapevines increases shoot water transport capacity

2020 ◽  
Vol 295 ◽  
pp. 108173
Author(s):  
Eugenia Galat Giorgi ◽  
Markus Keller ◽  
Víctor Sadras ◽  
Fidel Alejandro Roig ◽  
Jorge Perez Peña
Keyword(s):  
High Temperature ◽  
Water Transport ◽  
Transport Capacity
Sign in / Sign up

Export Citation Format

Share Document