scholarly journals Seasonal changes in carbohydrates, cyclitols, and water relations of 3 field grown Eucalyptus species from contrasting taxonomy on a common site

2010 ◽  
Vol 67 (1) ◽  
pp. 104-104 ◽  
Author(s):  
Andrew Merchant ◽  
Stefan K. Arndt ◽  
Douglas M. Rowell ◽  
Sabine Posch ◽  
Andrew Callister ◽  
...  
Keyword(s):  
Water Relations ◽  
Seasonal Changes ◽  
Eucalyptus Species ◽  
Common Site

Influence of cold hardening on water relations of three Eucalyptus species

1990 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
R. Valentini ◽  
G. S. Mugnozza ◽  
E. Giordano ◽  
E. Kuzminsky
Keyword(s):  
Water Relations ◽  
Cold Hardening ◽  
Eucalyptus Species

scholarly journals Water relations, photosynthesis, xylem embolism and accumulation of carbohydrates and cyclitols in two Eucalyptus species (E. camaldulensis and E. torquata) subjected to dehydration–rehydration cycle

Trees ◽  
2020 ◽  
Vol 34 (6) ◽  
pp. 1439-1452
Author(s):  
Samira Souden ◽  
Mustapha Ennajeh ◽  
Sarra Ouledali ◽  
Nooman Massoudi ◽  
Hervé Cochard ◽  
...  
Keyword(s):  
Water Relations ◽  
Eucalyptus Species ◽  
Xylem Embolism

Seasonal Changes in the Water Relations of Desert Plants

Ecology ◽  
1923 ◽  
Vol 4 (3) ◽  
pp. 266-292 ◽  
Author(s):  
Edith B. Shreve
Keyword(s):  
Water Relations ◽  
Seasonal Changes ◽  
Desert Plants

Water Relations of Rural Eucalypt Dieback.

1988 ◽  
Vol 36 (2) ◽  
pp. 233 ◽  
Author(s):  
DS Crombie ◽  
JA Milburn
Keyword(s):  
Disease Severity ◽  
Water Relations ◽  
New South ◽  
New South Wales ◽  
Leaf Water ◽  
Eucalyptus Species ◽  
Water Potentials ◽  
South Wales ◽  
Individual Trees

The water relations of healthy and dieback-affected individuals of three Eucalyptus species typical of the northern tablelands of New South Wales were compared. Dawn water potentials of healthy and dieback-affected trees were all very similar. Midday water potentials of trees with the most severe dieback symptoms were often lower than those of nearby healthy trees by up to 0.6 MPa. Leaf con- ductances of the most severely dieback-affected trees were usually greater than those of healthy trees. Differences decreased with time and when more trees with less severe symptoms were measured late in the study no significant differences in water relations were found. It seems therefore that the effects of dieback on the water relations of trees are too small for measurements of leaf water potentials or leaf conductances to be useful indicators of disease severity in individual trees.

Seasonal changes in plant–water relations influence patterns of leaf display in Miombo woodlands: evidence of water conservative strategies

2018 ◽  
Vol 39 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Royd Vinya ◽  
Yadvinder Malhi ◽  
Nick D Brown ◽  
Joshua B Fisher ◽  
Timothy Brodribb ◽  
...  
Keyword(s):  
Water Relations ◽  
Seasonal Changes ◽  
Plant Water Relations ◽  
Plant Water ◽  
Miombo Woodlands

scholarly journals Water relations and hydraulic architecture in Cerrado trees: adjustments to seasonal changes in water availability and evaporative demand

2008 ◽  
Vol 20 (3) ◽  
pp. 233-245 ◽  
Author(s):  
Sandra J. Bucci ◽  
Fabian G. Scholz ◽  
Guillermo Goldstein ◽  
Frederick C. Meinzer ◽  
Augusto C. Franco ◽  
...  
Keyword(s):  
Water Potential ◽  
Water Relations ◽  
Seasonal Changes ◽  
Soil Water Potential ◽  
Woody Species ◽  
Dry Season ◽  
Hydraulic Architecture ◽  
Wet Season ◽  
Evaporative Demand ◽  
Water Deficits

We determined adjustments in physiology and morphology that allow Neotropical savanna trees from central Brazil (Cerrado) to avoid water deficits and to maintain a nearly constant internal water balance despite seasonal changes in precipitation and air saturation deficit (D). Precipitation in the study area is highly seasonal with about five nearly rainless months during which D is two fold higher compared to wet season values. As a consequence of the seasonal fluctuations in rainfall and D, soil water potential changes substantially in the upper 100 cm of soil, but remains nearly constant below 2 m depth. Hydraulic architecture and water relations traits of Cerrado trees adjusted during the dry season to prevent increasing water deficits and insure homeostasis in minimum leaf water potential ψL and in total daily water loss per plant (isohydry). The isohydric behavior of Cerrado trees was the result of a decrease in total leaf surface area per tree, a strong stomatal control of evaporative losses, an increase in leaf-specific hydraulic conductivity and leaf hydraulic conductance and an increase in the amount of water withdrawn from internal stem storage, during the dry season. Water transport efficiency increased in the same proportion in leaves and terminal stems during the dry season. All of these seasonal adjustments were important for maintaining ψL above critical thresholds, which reduces the rate of embolism formation in stems and help to avoid turgor loss in leaf tissues still during the dry season. These adjustments allow the stems of most Cerrado woody species to operate far from the point of catastrophic dysfunction for cavitation, while leaves operate close to it and experience embolism on a daily basis, especially during the dry season.

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