geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Linking leaf chlorophyll fluorescence properties to physiological responses for detection of salt and drought stress in coastal plant species


, : Linking leaf chlorophyll fluorescence properties to physiological responses for detection of salt and drought stress in coastal plant species. Physiologia Plantarum 131(3): 422-433

Effects of salinity and drought on physiology and chlorophyll fluorescence were used to evaluate stress in two coastal plants, Myrica cerifera (L.) and Phragmites australis (Cav.) Trin. ex Steud. Drought and salinity stress were induced and measurements of stomatal conductance, photosynthesis, xylem pressure potential (psi) and fluorescence were conducted following treatment. The onset of stress began at 2 g l(-1) for M. cerifera, and 5 g l(-1) for P. australis, as seen by significant decreases in physiological measurements. Despite the physiological effects of salinity, there was no significant difference in dark-adapted fluorescence (F(v)/F(m), where F(m) is the maximal fluorescence in dark-adapted leaves) for either species at any salinity level. Significant decreases in the light-adapted measurement Delta F/F'(m) (F'(m) is maximal fluorescence in light-adapted leaves) occurred at 10 g l(-1) in M. cerifera and P. australis, days before visible stress was evident. The quantum yield of xanthophyll-regulated thermal energy dissipation (Phi(NPQ), where NPQ is non-photochemical quenching of chlorophyll fluorescence) increased with decreasing Delta F/F'(m). Drought studies showed similar results, with significant decreases in physiological measurements occurring by day 2 in M. cerifera and day 4 in P. australis. Differences in Delta F/F'(m) were seen by day 5 for both species, whereas F(v)/F(m) showed no indication of stress, despite apparent visible signs. Xanthophyll-cycle-dependent energy dissipation may be the underlying mechanism in protecting photosystem II from excess energy in salinity- and drought-treated plants.

US$19.90

PMID: 18251881

DOI: 10.1111/j.1399-3054.2007.00973.x


Other references

Manning, P.J.; Martin, P.D., 1970: Metastasis of canine transmissible venereal tumor to the adenohypophysis. Pathologia Veterinaria 7(2): 148-152

Guilfoyle, D.N.; Hrabe, J., 2006: Interleaved snapshot echo planar imaging of mouse brain at 7.0 T. Single-shot echo planar imaging (EPI) of a mouse brain at high field is very challenging. Large susceptibility-induced gradients affect much of the brain volume, causing severe image deformations and signal loss. Segmented EPI and other convention...

Bleckman, H., 1986: Eine Spinne, die Fische fangt. Analyse des Beutefangverhaltens der semiaquatischen Raubspinne Dolomedes triton. Aquarien- und Terrarien-Zeitschrift, 399: 423-426

Smith, T.C.; Howe, J.R., 2000: Concentration-dependent substate behavior of native AMPA receptors. AMPA-type glutamate receptors mediate most excitatory postsynaptic currents (EPSCs) at central synapses, and their conductance determines in part the size of EPSCs. The conductance of a recombinant AMPA receptor depends on the number of agonist mo...

Lomborg, K.; Agger, N., 1990: A new, flexible Paratect bolus. Application and effect on intestinal strongyles in calves turned out onto pasture for the first time. In 1987 and 1988, studies were made on 30 calves turned out in May onto permanent pasture. The new, non-metallic Paratect (morantel) bolus reduced the level of pasture contamination and resulted in increased weight gain (28 kg in 1987 and 13 kg in...

Bandini, M.; Bottoni, A.; Eichholzer, A.; Miscione, G.Pietro.; Stenta, M., 2011: Asymmetric phase-transfer-catalyzed intramolecular N-alkylation of indoles and pyrroles: a combined experimental and theoretical investigation. Asymmetric phase-transfer catalysis (PTC) has risen to prominence over the last decade as a straightforward synthetic methodology for the preparation of pharmacologically active compounds in enantiomerically pure form. However, the complex interpl...

Acad Sin Peking Inst Bot; Peking Fruit Co, 1974: Studies on the brown core of the pear fruit part 1 the effect of temperature on the brown core. Acta Botanica Sinica 16(2): 140-145

Brechot, C., 1998: Molecular mechanisms of hepatitis B and C viruses related to liver carcinogenesis. Hepato-Gastroenterology 45 Suppl 3: 1189-1196

Shimizu, H.; Osanai, A.; Sakamoto, K.; Inaoka, D.Ken.; Shiba, T.; Harada, S.; Kita, K., 2013: Crystal structure of mitochondrial quinol-fumarate reductase from the parasitic nematode Ascaris suum. In the anaerobic respiratory chain of the parasitic nematode Ascaris suum, complex II couples the reduction of fumarate to the oxidation of rhodoquinol, a reverse reaction catalyzed by mammalian complex II. In this study, the first structure of an...

Narindrasorasak, S.; Kulkarni, P.; Deschamps, P.; She, Y-Min.; Sarkar, B., 2007: Characterization and copper binding properties of human COMMD1 (MURR1). COMMD1 (copper metabolism gene MURR1 (mouse U2af1-rs1 region1) domain) belongs to a family of multifunctional proteins that inhibit nuclear factor NF-kappa B. COMMD1 was implicated as a regulator of copper metabolism by the discovery that a delet...