Leaf reflectance and photo‐ and antioxidant protection in field‐grown summer‐stressed Phillyrea angustifolia. Optical signals of oxidative stress?

@article{Peuelas2004LeafRA,
  title={Leaf reflectance and photo‐ and antioxidant protection in field‐grown summer‐stressed Phillyrea angustifolia. Optical signals of oxidative stress?},
  author={Josep Pe{\~n}uelas and Sergi Munn{\'e}-Bosch and Joan Llusi{\`a} and Iolanda Filella},
  journal={New Phytologist},
  year={2004},
  volume={162},
  pages={115-124}
}
Summary •  Here we aimed to assess the photo and oxidative stress linked to the Mediterranean summer conditions characterized by drought, heat and high irradiance, and to find possible optical signals of such changes. •  Foliar reflectance was measured in parallel to leaf water content, gas exchange, chlorophyll fluorescence, extent of oxidative stress, and mechanisms of photo- and antioxidative protection in leaves of the evergreen Phillyrea angustifolia (Oleaceae) plants exposed to… 

Figures and Tables from this paper

Reflectance and Cyclic Electron Flow as an Indicator of Drought Stress in Cotton (Gossypium hirsutum)

Chlorophyll b showed the best correlation with reflectance at 731 nm and is a better indicator of drought and CEF play a major role in G. hirsutum leaves during mild as well as under severe water stress condition and is thus a good indicator of water stress.

Photosynthesis, non-photochemical pathways and activities of antioxidant enzymes in a resilient evergreen oak under different climatic conditions from a valley-savanna in Southwest China.

The results indicated that the photosynthetic apparatus of the oak leaves was highly capable of maintaining its function under the multiple stresses in different seasons in the present valley-savanna.

The Synergistic Responses of Different Photoprotective Pathways in Dwarf Bamboo (Fargesia rufa) to Drought and Subsequent Rewatering

F. rufa plants can withstand drought and is capable of survival in such environment, and the synergistic function of these photoprotective pathways except photorespiration can protect the photosynthetic apparatus from oxidative damage in response to varying intensities of drought stress when CO2 assimilation is restricted.

Leaf Pigments, Surface Wax and Spectral Vegetation Indices for Heat Stress Resistance in Pea

Pea is a grain legume crop commonly grown in semi-arid temperate regions. Pea is susceptible to heat stress that affects development and reduces yield. Leaf pigments and surface wax in a crop canopy

Photo-oxidative stress markers as a measure of abiotic stress-induced leaf senescence: advantages and limitations.

This review will summarize the current technologies used to evaluate the extent of photo-oxidative stress in plants, and discuss their advantages and limitations in characterizing abiotic stress-induced leaf senescence in crops.

Relationship between physiological and biochemical measurements with spectral reflectance for two Phaseolus vulgaris L. genotypes under multiple stress

Hyperspectral data seem to be particularly useful for fast and non-destructive assessment method for photosynthesis and enzymes activity of common bean plant.

Changes in Photosystem II Activity and Leaf Reflectance Features of Several Subtropical Woody Plants Under Simulated SO2 Treatment

The effects of simulated SO2 treatment on the photosynthetic apparatus were investigated in five subtropical forest plants, namely Pinus massoniana Lamb., Schima superba Gardn. et Champ., Castanopsis

Evaluation of drought and UV radiation impacts on above-ground biomass of mountain grassland by spectral reflectance and thermal imaging techniques

Novotná K., Klem K., Holub P., Rapantová B., Urban O. 2016: Evaluation of drought and UV radiation impacts on above-ground biomass of mountain grassland by spectral reflectance and thermal imaging
...

References

SHOWING 1-10 OF 53 REFERENCES

Photochemical reflectance index and leaf photosynthetic radiation-use-efficiency assessment in Mediterranean trees

Abstract This Letter presents new data validating the use of the photochemical reflectance index PRI (R570-R531)/(R570 + R531) to assess photosynthetic- radiation-use-efficiency under mild water

Comparative field study of spring and summer leaf gas exchange and photobiology of the mediterranean trees Quercus ilex and Phillyrea latifolia

Summer-induced changes in gas exchange, fluorescence and reflectance were measured on leaves of two co-occurring Mediterranean small trees, Quercus ilex and Phillyrea latifolia, in May, June and July

Relationship between photosynthetic radiation-use efficiency of barley canopies and the photochemical reflectance index (PRI)

Some processes of excess radiation dissipation have been associated with changes in leaf reflectance near 531 nm. We aimed to study the relations between the photochemical reflectance index (PRI)

Summer survival of leaves in a soft-leaved shrub (Phlomis fruticosa L., Labiatae) under Mediterranean field conditions: avoidance of photoinhibitory damage through decreased chlorophyll contents

It may be concluded that P. fruticosa leaves avoid severe photoinhibitory and oxidative damage during the long, warm, dry and sunny Mediterranean summer by reducing light harvesting and electron flow capacity, whilst maintaining an adequate photoprotective ability.

Changes in carotenoids, tocopherols and diterpenes during drought and recovery, and the biological significance of chlorophyll loss in Rosmarinus officinalis plants

The photoprotection conferred by the xanthophyll cycle and the antioxidant function of tocopherols, lutein and diterpenes may help to avoid irreversible damage in severe drought, making possible the recovery of functional membranes after the autumn rainfalls.

Factors influencing carbon fixation and water use by mediterranean sclerophyll shrubs during summer drought

Reductions in leaf area have the strongest effect on resource capture and use during non-water-stressed periods and the least effect under extreme drought conditions, while shifts in physiological response lead to large savings of water and efficient water use under extreme stress.

Role of the xanthophyll cycle in photoprotection elucidated by measurements of light-induced absorbance changes, fluorescence and photosynthesis in leaves of Hedera canariensis

Measurements of light-induced absorbance changes, Chl fluorescence, and photosynthetic O2 evolution in sun and shade leaves of Hedera canariensis support the conclusion that the xanthophyll cycle has a central role in regulating the energy flow to the PS II reaction centers and also provide direct evidence that zeaxanthin protects against photoinhibitory injury to the photosynthesis system.

Photosynthetic light-harvesting function of carotenoids in higher-plant leaves exposed to high light irradiances

The data suggest that the efficiency of energy transfer from carotenoids to chlorophylls varies with the light environment both in the short term and in the long term, with excess light energy noticeably inhibiting the photosynthetic light-harvesting function of carotanoids.

Estimation of plant water concentration by the reflectance Water Index WI (R900/R970)

Abstract Water Index WI (R900/R970) was used for the estimation of plant water concentration (PWC) by ground-based, reflectance measurements. Reflectance and PWC were measured for adult plants
...