Light-Induced Fern-Spore Germination under Reduced Water Potential

Botanica Acta ◽  
1989 ◽  
Vol 102 (3) ◽  
pp. 222-228 ◽  
Author(s):  
G. K. Psaras ◽  
W. Haupt
Keyword(s):  
Water Potential ◽  
Spore Germination ◽  
Fern Spore Germination ◽  
Reduced Water

scholarly journals Effects of water potential on spore germination and viability of Fusarium species

2008 ◽  
Vol 35 (11) ◽  
pp. 1411-1418 ◽  
Author(s):  
D. Palmero Llamas ◽  
M. de Cara Gonzalez ◽  
C. Iglesias Gonzalez ◽  
G. Ruíz Lopez ◽  
J. C. Tello Marquina
Keyword(s):  
Water Potential ◽  
Spore Germination ◽  
Fusarium Species

scholarly journals Drought Adaptation in Fuchsia magellanica and Its Effect on Freezing Tolerance

2008 ◽  
Vol 133 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Majken Pagter ◽  
Karen K. Petersen ◽  
Fulai Liu ◽  
Christian R. Jensen
Keyword(s):  
Water Potential ◽  
Water Deficit ◽  
Freezing Tolerance ◽  
Woody Plants ◽  
Xylem Sap ◽  
Water Deficiency ◽  
Frost Injury ◽  
Different Types ◽  
Curvilinear Relation ◽  
Reduced Water

Fuchsia (Fuchsia L.) is a popular woody ornamental, but it is very susceptible to frost injury during winter. As drought stress may be used to enhance freezing tolerance in woody plants, the effects of different types of water deficit on growth, selected physiological traits, and freezing tolerance were examined in Fuchsia magellanica Lam. ‘Riccartonii’. Drought responses were investigated after 6 weeks of pretreatment, where individual plants grown in a greenhouse under conditions of unrestricted water supply were compared with plants subjected to cyclic or continuous water deficit. After an additional 4 weeks of treatment at short day (10 h) and low temperature (8 °C day/4 °C night), freezing tolerance was examined. Both continuous and cyclic water deficit plants reduced water loss by reducing aboveground biomass and by efficient stomatal regulation. Continuous water deficit plants tended to adjust osmotically, while cyclic water deficit induced significantly higher xylem sap abscisic acid [(ABA)xylem] and leaf proline concentrations and a lower leaf water potential (ψl) than continuous water deficit, indicating that F. magellanica responds differently to continuous water deficit and to fast drying associated with stress phases of cyclic water deficit. The root water potential (ψr) and (ABA)xylem were negatively linearly correlated, implying that increasing water deficiency stimulated formation of ABA in the roots. An inverse, curvilinear relation between (ABA)xylem and stomatal conductance (g s) indicated that root-originated ABA might control g s during mild water deficits. Neither cold-acclimating conditions alone nor combined with water deficit increased stem freezing tolerance, indicating that F. magellanica lacks cold-acclimation ability under the inductive conditions used in this study.

scholarly journals Enhancement of Fern Spore Germination and Gametophyte Growth in Artificial Media

2001 ◽  
Vol 91 (4) ◽  
pp. 179-186 ◽  
Author(s):  
E. Sheffield ◽  
G. E. Douglas ◽  
S. J. Hearne ◽  
S. Huxham ◽  
J. M. Wynn
Keyword(s):  
Spore Germination ◽  
Fern Spore Germination

Fern spore germination in response to environmental factors

2015 ◽  
Vol 10 (4) ◽  
pp. 358-376 ◽  
Author(s):  
Jinwei Suo ◽  
Sixue Chen ◽  
Qi Zhao ◽  
Lei Shi ◽  
Shaojun Dai
Keyword(s):  
Environmental Factors ◽  
Spore Germination ◽  
Fern Spore Germination

Spore Germination of Three Tree Fern Species in Response to Light, Water Potential, and Canopy Openness

2015 ◽  
Vol 105 (2) ◽  
pp. 59-72 ◽  
Author(s):  
Karolina Riaño Ospina ◽  
Oscar Briones ◽  
Blanca Pérez-García
Keyword(s):  
Water Potential ◽  
Spore Germination ◽  
Canopy Openness ◽  
Tree Fern ◽  
Light Water ◽  
Fern Species

scholarly journals Cold Hardiness of Evergreen Azaleas Increased by Water Stress Imposed at Three Days

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 848E-848
Author(s):  
Tomasz Anisko ◽  
Orville M. Lindstrom
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Water Potential ◽  
Cold Hardiness ◽  
Plant Parts ◽  
Effect Of Water ◽  
Cold Hardy ◽  
Reduced Water

The effect of water stress on cold hardiness was examined in evergreen azaleas, `Coral Bell' (CB), `Hinodegiri' (HD), and `Red Ruffle' (RR). Plants were well-watered between 8 Aug. and 1 Nov. (wet) or were subjected to 3 weeks of reduced water supply starting on one of three dates, 1 Aug. (dry 1), 29 Aug. (dry 2), and 19 Sept. (dry 3). Cold hardiness of leaves and lower, middle, and upper stems was tested on 29 Aug., 19 Sept., 10 Oct., 1 Nov. By the end of each 3-week period, water potential of water stressed plants reached –1.5 to –1.8 MPa compared to around –0.8 MPa of well-watered plants. Reducing the water supply significantly increased cold hardiness of all tested plant parts in all cultivars regardless of timing of watering reduction, with two exceptions, CB middle stems on 29 Aug. and HD leaves on 19 Oct. Three weeks after rewatering cold hardiness of water-stressed plants did not differ significantly from well-watered plants, except for HD plants under dry three treatment, which continued to be 1.0 (middle stems) to 4.3 (upper stems) more cold hardy.

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