ArticlePlant physiology2003
Plasma membrane aquaporins are involved in winter embolism recovery in walnut tree.
Article in Plant physiology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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Who cites it
30 citing papers in PubMed, 129 citations in OpenAlex.
- Water flux patterns and aquaporin dynamics: linking stomatal demand to root hydraulics in pearl millet hybrids.Frontiers in plant science · 2026Article
- Functional trade-offs in volume allocation to xylem cell types in 75 species from the Brazilian savanna Cerrado.Annals of botany · 2022Article
- Xylem Parenchyma-Role and Relevance in Wood Functioning in Trees.Plants (Basel, Switzerland) · 2021Review
- Die hard: timberline conifers survive annual winter embolism.The New phytologist · 2020Article
- The Possible Role of Non-Structural Carbohydrates in the Regulation of Tree Hydraulics.International journal of molecular sciences · 2019Review
- Transcriptome sequencing ofPeerJ · 2019Article
- Plant and animal aquaporins crosstalk: what can be revealed from distinct perspectives.Biophysical reviews · 2017Review
- Article
- A Comparison of Petiole Hydraulics and Aquaporin Expression in an Anisohydric and Isohydric Cultivar of Grapevine in Response to Water-Stress Induced Cavitation.Frontiers in plant science · 2017Article
- Plant Aquaporins: Genome-Wide Identification, Transcriptomics, Proteomics, and Advanced Analytical Tools.Frontiers in plant science · 2016Review
- Effects of environmental factors and management practices on microclimate, winter physiology, and frost resistance in trees.Frontiers in plant science · 2015Review
- Down-regulation of plasma intrinsic protein1 aquaporin in poplar trees is detrimental to recovery from embolism.Plant physiology · 2014Article
- Gene expression in vessel-associated cells upon xylem embolism repair in Vitis vinifera L. petioles.Planta · 2014Article
- Regulation of leaf hydraulics: from molecular to whole plant levels.Frontiers in plant science · 2013Article
- Maintenance of xylem Network Transport Capacity: A Review of Embolism Repair in Vascular Plants.Frontiers in plant science · 2013Article
- Analysis of xylem sap from functional (nonembolized) and nonfunctional (embolized) vessels of Populus nigra: chemistry of refilling.Plant physiology · 2012Article
- Smart pipes: the bundle sheath role as xylem-mesophyll barrier.Plant signaling & behavior · 2012Article
- Article
- Transcriptome response to embolism formation in stems of Populus trichocarpa provides insight into signaling and the biology of refilling.Plant physiology · 2011Article
- Hydraulic connections of leaves and fruit to the parent plant in Capsicum frutescens (hot pepper) during fruit ripening.Annals of botany · 2010Article
Corrections and comments
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Authors and funding
9 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In perennial plants, freeze-thaw cycles during the winter months can induce the formation of air bubbles in xylem vessels, leading to changes in their hydraulic conductivity. Refilling of embolized xylem vessels requires an osmotic force that is created by the accumulation of soluble sugars in the vessels. Low water potential leads to water movement from the parenchyma cells into the xylem vessels. The water flux gives rise to a positive pressure essential for the recovery of xylem hydraulic conductivity. We investigated the possible role of plasma membrane aquaporins in winter embolism recovery in walnut (Juglans regia). First, we established that xylem parenchyma starch is converted to sucrose in the winter months. Then, from a xylem-derived cDNA library, we isolated two PIP2 aquaporin genes (JrPIP2,1 and JrPIP2,2) that encode nearly identical proteins. The water channel activity of the JrPIP2,1 protein was demonstrated by its expression in Xenopus laevis oocytes. The expression of the two PIP2 isoforms was investigated throughout the autumn-winter period. In the winter period, high levels of PIP2 mRNA and corresponding protein occurred simultaneously with the rise in sucrose. Furthermore, immunolocalization studies in the winter period show that PIP2 aquaporins were mainly localized in vessel-associated cells, which play a major role in controlling solute flux between parenchyma cells and xylem vessels. Taken together, our data suggest that PIP2 aquaporins could play a role in water transport between xylem parenchyma cells and embolized vessels.
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