The Water Relations of Thuja occidentalis L. from Two Sites of Contrasting Moisture Availability

1989 ◽  
Vol 150 (4) ◽  
pp. 445-448 ◽  
Author(s):  
Donald E. Collier ◽  
Michael G. Boyer
Keyword(s):  
Water Relations ◽  
Thuja Occidentalis ◽  
Moisture Availability

scholarly journals Seedbed and moisture availability determine safe sites for early Thuja occidentalis (Cupressaceae) regeneration

2000 ◽  
Vol 87 (12) ◽  
pp. 1807-1814 ◽  
Author(s):  
Meredith W. Cornett ◽  
Peter B. Reich ◽  
Klaus J. Puettmann ◽  
Lee E. Frelich
Keyword(s):  
Safe Sites ◽  
Thuja Occidentalis ◽  
Moisture Availability

Tissue water relations of Pinusponderosa and Arctostaphylospatula exposed to various levels of soil moisture depletion

1994 ◽  
Vol 24 (7) ◽  
pp. 1495-1502 ◽  
Author(s):  
Paul D. Anderson ◽  
John A. Helms
Keyword(s):  
Soil Moisture ◽  
Water Content ◽  
Water Relations ◽  
Osmotic Adjustment ◽  
Moisture Regime ◽  
Tissue Elasticity ◽  
Tissue Water ◽  
Turgor Loss Point ◽  
Moisture Availability ◽  
Osmotic Potentials

The tissue water relations of Pinusponderosa Dougl. ex Laws, (ponderosa pine) and Arctostaphylospatula Greene (greenleaf manzanita) seedlings subjected to three levels of soil moisture availability were monitored over a 6-month period. Throughout the study, osmotic potentials at full turgor and at the turgor loss point were approximately 0.5 MPa greater for pine than for manzanita. Osmotic adjustment occurred for both species as evidenced by declines in osmotic potentials at full turgor and at the turgor loss point of 0.5–0.6 MPa over the study period. Pine maintained higher bulk tissue elasticity and lower water content at the turgor loss point relative to manzanita. Moisture regime had little effect on the measured parameters except for apoplasmic water content which increased at moderate and high stress levels for both species. Results suggest that osmotic adjustment occurred, at least partially, as a result of factors other than moisture availability. The lower tissue elasticity and higher water content at the turgor loss point for manzanita suggest that the shrub species is more dependent upon high foliar water content for the maintenance of turgor compared with the conifer.

Effect of water shortage on six potato genotypes in the highlands of Bolivia (II): water relations, physiological parameters

Agronomie ◽  
2003 ◽  
Vol 23 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Christophe Tourneux ◽  
Andr� Devaux ◽  
Maria Ren� Camacho ◽  
Pablo Mamani ◽  
Jean-Fran�ois Ledent
Keyword(s):  
Water Relations ◽  
Water Shortage ◽  
Physiological Parameters ◽  
Effect Of Water

Use of Ornamental Trees in Dating of Abandoned Cemeteries on the Example of Thuja Occidentalis and Thuja Orientalis

2012 ◽  
Vol 1 (1) ◽  
pp. 45-50
Author(s):  
Magdalena Opała ◽  
Leszek Majgier
Keyword(s):  
Climatic Conditions ◽  
The Other ◽  
Lake District ◽  
Thuja Occidentalis ◽  
North Eastern ◽  
The 1960S ◽  
Thuja Orientalis ◽  
Ornamental Trees ◽  
Common Tree ◽  
Local Habitat

Abstract Due to the lack of maintenance, abandoned cemeteries are often incorporated into the landscape. In many cases the information about the age of the cemetery is unavailable. To find out the approximate time of the formation of the cemetery the information recorded in the annual tree and shrub rings can be used. One of the most common tree species, planted for ornamental and symbolic purposes on the cemeteries, are Thuja orientalis and Thuja occidentalis. Alien to the Polish flora, these species adapted well to the local habitat and climatic conditions. The paper presents an attempt to apply dendrochronological dating to determine the age of the abandoned cemeteries in the region of the Great Masurian Lakes, part of the Masurian Lake District (north-eastern Poland). The study included five abandoned cemeteries. In total, 15 cores were taken from the trees. After applying the standard dendrochronological method, local chronologies for the studied species were established. The research indicated that the oldest found specimens - over 70 yrs old - are Thuja occidentalis individuals growing at the Słabowo cemetery. At the other sites the specimens of both Thuja species date back to the 1960s and early 1970s. Compared to the historical information regarding the age and origin of the studied objects, thujas growing there are much younger than the age of the cemeteries foundation. The presented method proved to be very helpful in understanding the time of Thuja occidentalis and Thuja orientalis introduction at the investigated cemeteries.

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