Embolism induced by winter drought may be critical for the survival of Pinus sylvestris L. near its southern distribution limit

Peguero‐Pina, José Javier; Alquézar-Alquézar, José María; Mayr, Stefan; Cochard, Hervé; Gil‐Pelegrín, Eustaquio

doi:10.1007/s13595-011-0068-0

Cited by 24 publications

(18 citation statements)

References 33 publications

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“…Importantly, not all embolism events during winter are necessarily caused by freeze‐thaw cycles. Sublimation and cavitation by water stress in thawed and transpiring crowns with frozen boles or soil represent other potential causes (Peguero‐Pina et al 2011).…”

Section: Physical and Physiological Constraints On Xylem Functionmentioning

confidence: 99%

The Plant Vascular System: Evolution, Development and Functions^F

Lucas¹,

Groover²,

Lichtenberger³

et al. 2013

JIPB

610

444

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Contents Introduction 295 Evolution of the Plant Vascular System 295 Phloem Development & Differentiation 300 Molecular Mechanisms Underlying Xylem Cell Differentiation 307 Spatial & Temporal Regulation of Vascular Patterning 311 Secondary Vascular Development 318 Physical and Physiological Constraints on Phloem Transport Function 321 Physical & Physiological Constraints on Xylem Function 328 Long‐distance Signaling Through the Phloem 339 Root‐to‐shoot Signaling 347 Vascular Transport of Microelement Minerals 351 Systemic Signaling: Pathogen Resistance 356 Future Perspectives 361 Acknowledgements 362 References 362 Abstract [ William J. Lucas (Corresponding author)] The emergence of the tracheophyte‐based vascular system of land plants had major impacts on the evolution of terrestrial biology, in general, through its role in facilitating the development of plants with increased stature, photosynthetic output, and ability to colonize a greatly expanded range of environmental habitats. Recently, considerable progress has been made in terms of our understanding of the developmental and physiological programs involved in the formation and function of the plant vascular system. In this review, we first examine the evolutionary events that gave rise to the tracheophytes, followed by analysis of the genetic and hormonal networks that cooperate to orchestrate vascular development in the gymnosperms and angiosperms. The two essential functions performed by the vascular system, namely the delivery of resources (water, essential mineral nutrients, sugars and amino acids) to the various plant organs and provision of mechanical support are next discussed. Here, we focus on critical questions relating to structural and physiological properties controlling the delivery of material through the xylem and phloem. Recent discoveries into the role of the vascular system as an effective long‐distance communication system are next assessed in terms of the coordination of developmental, physiological and defense‐related processes, at the whole‐plant level. A concerted effort has been made to integrate all these new findings into a comprehensive picture of the state‐of‐the‐art in the area of plant vascular biology. Finally, areas important for future research are highlighted in terms of their likely contribution both to basic knowledge and applications to primary industry.

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Section: Physical and Physiological Constraints On Xylem Functionmentioning

confidence: 99%

The Plant Vascular System: Evolution, Development and Functions^F

Lucas¹,

Groover²,

Lichtenberger³

et al. 2013

JIPB

610

444

View full text Add to dashboard Cite

show abstract

“…The oldest procedure is based on the perfusion of a sample at low pressure with a dye like safranin, basic fuchsin, alcian blue, phloxine B (Lo Gullo and Salleo 1991;Peguero-Pina et al 2011a). This method implies a microscopic observation of a previously perfused segment for an accurate distinction between embolized and non-embolized conduits (Corcuera et al 2006).…”

Section: Methodologies For Measuring Xylem Cavitation and Embolismmentioning

confidence: 99%

“…The different thresholds derived from the establishment of cavitation curves have been used for determining the distribution of plant species within (Maherali et al 2006) and among vegetation types (Maherali et al 2004;Bhaskar et al 2007). Moreover, the collapse of the hydraulic conductivity of the trunk or branches has been associated with some processes of forest decline (Corcuera et al 2006;Hoffmann et al 2011, Peguero-Pina et al 2011a or with the lack of seedling recruitment in Mediterranean areas (Esteso-Martínez et al 2006). These examples affirm the outstanding contribution of vulnerability to drought induced cavitation in woody plants in the ecology of ecosystems.…”

Section: Xylem Cavitation In the Context Of Plant Functionalitymentioning

confidence: 99%

“…In spite of this, the occurrence of repeated freeze-thaw events may reduce the resistance to xylem cavitation, causing embolism even in conifer species with small-diameter tracheids Mayr et al 2006). Other factors that could cause further decreases of water potential-low soil temperatures (which limit water uptake by roots) and high radiation events during winter (which increase the loss of water by transpiration)-may induce embolism in a more vulnerable xylem due to the occurrence of repeated freeze-thaw cycles (Peguero-Pina et al 2011a). Thus, the combined stress of low water potentials and a high number of freeze-thaw events is sufficient to induce embolism in conifers (Mayr et al 2006).…”

Section: Other Factors Affecting Xylem Cavitation: Low Temperature Anmentioning

confidence: 99%

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Xylem Cavitation and Embolism in Plants Living in Water-Limited Ecosystems

Vilagrosa

Chirino

Peguero‐Pina

et al. 2012

Plant Responses to Drought Stress

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Water deficit is considered the main limiting factor for the establishment, survival, and growth of plants mainly in water-limited ecosystems. Plants have evolved a wide range of morphologic and functional mechanisms to adapt to arid environments. However, if the tension in the xylem conduits becomes too high, thus xylem cavitation can occur i.e., water column breakage. This results in the hydraulic disconnection of leaves and above-ground parts from roots because xylem conduits are filled with air and water vapor, and this phenomenon is called embolism. Therefore, the resistance of the xylem to cavitation and embolism is of paramount importance for plant functioning. In this chapter, we will review the role of plant hydraulics and xylem cavitation in the context of water-limited ecosystems and their relationship with other plant functional traits and with survival capacity. These topics will be analyzed and discussed on the basis of current knowledge and our research experiences.

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“…Winter temperatures can impair the hydraulic functions of trees because water uptake from soil water reservoirs is very limited when upper soil layers are cool or frozen during winter months or early spring (Mellander et al, 2006;Peguero-Pina et al, 2011). …”

Section: Past Work Carried Out In Water Dynamics By Using Magnetic Rmentioning

confidence: 99%