Chloroplast avoidance movement as a sensitive indicator of relative water content during leaf desiccation in the dark

  title={Chloroplast avoidance movement as a sensitive indicator of relative water content during leaf desiccation in the dark},
  author={Jan Nau{\vs} and Slavom{\'i}r {\vS}mecko and Martina {\vS}pundov{\'a}},
  journal={Photosynthesis Research},
In the context of global climate change, drought is one of the major stress factors with negative effect on photosynthesis and plant productivity. Currently, chlorophyll fluorescence parameters are widely used as indicators of plant stress, mainly owing to the rapid, non-destructive and simple measurements this technique allows. However, these parameters have been shown to have limited sensitivity for the monitoring of water deficit as leaf desiccation has relatively small effect on photosystem… 

Effect of combination of light and drought stress on physiology and oxidative metabolism of rice plants

It appears that light-induced ROS (O2.-) production under drought condition provoked oxidative stress, though a potential mechanism of tolerance was apparent through antioxidant system.

Morphophysiological Changes in Cenchrus cili aris and Digitaria co m mutata Subjected to Water Stress

Drought-induced changes in C. ciliaris and D. commutat showed a better aptitude to preserve the PSII functional integrity, therefore a relatively good tolerance to water deficit is suggested.

Chloroplasts in C3 grasses move in response to blue-light

Key message Brachypodium distachyon is a good model for studying chloropla st movements in the crop plants, wheat, rye and barley. The movements are activated only by blue light, similar to

Chloroplast avoidance movement: a novel paradigm of ROS signalling

The present review discusses the mechanisms of ROS-mediated chloroplast avoidance movement involving ROS-Ca 2+ -actin communication system and NADPH oxidase (NOX)—plasma membrane (PM) H + -ATPase positive feed-forward loop.

Function Analysis of Drought Resistance Related Gene TaGAPCs and TaWRKYs in Wheat

Transcriptomic analysis of the TaGAPCs-RNAi strain of Changwu 134 and the wild-type wheat seedlings under natural drought conditions showed that TaGapCs regulates the expression of some TaWRKYs transcription factors, activates antioxidant pathways, enhances tolerance of wheat to drought stress.

Morphophysiological changes in young plants of Jatropha curcas L. (Euphorbiaceae) subjected to water stress and recovery

Drought-induced stomatal limitation of carbon assimilation and growth in J. curcas was showed and the average water consumption was 18% lower in plants subjected to water shortage, as compared to irrigated plants, however, drought-induced reduction in growth led to lower biomass water use efficiency (WUEbiomass).

A new device for continuous non-invasive measurements of leaf water content using NIR-transmission allowing dynamic tracking of water budgets

Leaf water content (LWC) permanently fluctuates under variable transpiration rate and sap flow and influences e.g. stomatal responses and osmotic adjustment of plant cells. Continuous recordings of

Overexpression of an NF-YC2 gene confers alkali tolerance to transgenic alfalfa (Medicago sativa L.)

Alkaline stress severely limits plant growth and yield worldwide. NF-YC transcription factors (TFs) respond to abiotic stress by activating gene expression. However, the biological function of NF-YC



Photosynthetic electron transport and specific photoprotective responses in wheat leaves under drought stress

The results support the roles of alternative electron sinks (either from PSII or PSI) and cyclic electron flow in photoprotection of PSII and PSI in drought stress conditions and analyses of the partitioning of absorbed energy between photosystems are needed for interpreting flux through linear electron flow, PSI cyclic electrons flow, along withAlternative electron sinks.

Stress Tolerance of Photosystem II in Vivo: Antagonistic Effects of Water, Heat, and Photoinhibition Stresses.

  • M. Havaux
  • Environmental Science
    Plant physiology
  • 1992
The results demonstrate the existence of a marked antagonism between physicochemical stresses, with water stress enhancing the resistance of photosystem II to constraints (heat, strong light at high temperature) that are usually associated with drought in the field.

Photosynthetic limitations caused by different rates of water-deficit induction in Glycine max and Vigna unguiculata

Plants subjected to different rates of induced water deficit induction were more sensitive to water deficit, as determined by all of the physiological parameters when subjected to RD, and the net photosynthetic rate (PN) was sharply reduced in the early stages of dehydration.

Photoprotective function of chloroplast avoidance movement: in vivo chlorophyll fluorescence study.

Chloroplast Movement in the Shade Plant Tradescantia albiflora Helps Protect Photosystem II against Light Stress

It is suggested that the greater tolerance of PSII against light stress in T. albiflora may be partly ascribed to its light-induced chloroplast rearrangement, because these two parameters were comparable in both plants.

Impact of two different types of heat stress on chloroplast movement and fluorescence signal of tobacco leaves

The changes in light-induced chloroplast movement caused by the HS pretreatment were detected after the particular heating regime at 25°C using a method of time-dependent collimated transmittance (CT) and compared with the chlorophyll O–J–I–P fluorescence rise (FLR) measurements.

Chloroplast movement behavior varies widely among species and does not correlate with high light stress tolerance

No correlation was found between high light stress tolerance and the speed or degree of transmission changes, indicating that plants can compensate for slow and limited transmission changes using other photoprotective mechanisms.

Chloroplast movements in leaves: Influence on chlorophyll fluorescence and measurements of light-induced absorbance changes related to ΔpH and zeaxanthin formation

Light-induced chloroplast movements were found to cause changes in chlorophyll fluorescence emission, closely matching those in leaf absorptance, both in terms of the kinetics and the maximum extent