Effect of High Temperature on Photosynthesis in Beans (I. Oxygen Evolution and Chlorophyll Fluorescence)

Pastenes, Claudio; Horton, Peter

doi:10.1104/pp.112.3.1245

Cited by 154 publications

(87 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High temperatures, on the other hand, provoke heat stress and accelerate the respiration (Abele et al 2002) and the photosynthetic rates (Pastenes and Horton 1996), leading to overproduction of reactive oxygen species that affect plant growth and productivity.…”

Section: Mapks and Temperature Stressesmentioning

confidence: 99%

MAPK cascades and major abiotic stresses

et al. 2014

View full text Add to dashboard Cite

Plants have evolved with complex signaling circuits that operate under multiple conditions and govern numerous cellular functions. Stress signaling in plant cells is a sophisticated network composed of interacting proteins organized into tiered cascades where the function of a molecule is dependent on the interaction and the activation of another. In a linear scheme, the receptors of cell surface sense the stimuli and convey stress signals through specific pathways and downstream phosphorylation events controlled by mitogen-activated protein (MAP) kinases and second messengers, leading to appropriate adaptive responses. The specificity of the pathway is guided by scaffolding proteins and docking domains inside the interacting partners with distinctive structures and functions. The flexibility and the fine-tuned organization of the signaling molecules drive the activated MAP kinases into the appropriate location and connection to control and integrate the information flow. Here, we overview recent findings of the involvement of MAP kinases in major abiotic stresses (drought, cold and temperature fluctuations) and we shed light on the complexity and the specificity of MAP kinase signaling modules.

show abstract

Section: Mapks and Temperature Stressesmentioning

confidence: 99%

MAPK cascades and major abiotic stresses

et al. 2014

View full text Add to dashboard Cite

show abstract

“…First, elevated leaf temperatures that accompany high irradiance have been shown to cause metabolic imbalances (Pastenes and Horton, 1996b), deleterious effects on thylakoid function (Pastenes and Horton, 1996a), enhanced photoinhibition (Fuse et al, 1993), and enhanced photorespiration (Leegood and Edwards, 1996).…”

mentioning

confidence: 99%

Interactions between Senescence and Leaf Orientation Determine in Situ Patterns of Photosynthesis and Photoinhibition in Field-Grown Rice1

et al. 1999

View full text Add to dashboard Cite

Photosynthesis and photoinhibition in field-grown rice (Oryza sativa L.) were examined in relation to leaf age and orientation. Two varieties (IR72 and IR65598-112-2 [BSI206]) were grown in the field in the Philippines during the dry season under highly irrigated, well-fertilized conditions. Flag leaves were examined 60 and 100 d after transplanting. Because of the upright nature of 60-d-old rice leaves, patterns of photosynthesis were determined by solar movements: light falling on the exposed surface in the morning, a low incident angle of irradiance at midday, and light striking the opposite side of the leaf blade in the afternoon. There was an early morning burst of CO 2 assimilation and high levels of saturation of photosystem II electron transfer as incident irradiance reached a maximum level. However, by midday the photochemical efficiency increased again almost to maximum. Leaves that were 100 d old possessed a more horizontal orientation and were found to suffer greater levels of photoinhibition than younger leaves, and this was accompanied by increases in the de-epoxidation state of the xanthophyll cycle. Older leaves had significantly lower chlorophyll content but only slightly diminished photosynthesis capacity.Recent studies show that rice (Oryza sativa L.) yields need to increase by 70% of current levels by the year 2030 to meet the needs of a rapidly increasing human population, and this increase must arise almost exclusively from existing highly irrigated farmland (Khush and Peng, 1996). To achieve this increase in production, the yield potential needs to be increased and the rate of biomass production improved, particularly during the reproductive phase (Cassman, 1994). Of the numerous factors affecting crop yield, the efficiency with which solar radiation is transformed into biomass and the amount of radiation available are the most important (Russell et al., 1989).Light saturation of photosynthesis leads to a decline in radiation-conversion efficiency. For rice this was estimated to be approximately 17% (Murata and Matsushima, 1975) but varies greatly according to variety and growth conditions. In the tropical dry season, high irradiance not only saturates photosynthesis but also subjects the exposed flag leaf to high-light stress. The response of rice leaves to high irradiance has not been characterized in the field. In laboratory and field studies of other plant species, mechanisms operate that down-regulate PSII via an increase in the dissipation of excess excitation energy (Demmig-Adams and Adams, 1996;Horton et al., 1996). Although the major fraction of this is controlled by the thylakoid ⌬pH and the xanthophyll cycle, and therefore responds rapidly to changes in irradiance, some down-regulation is often longlived and in extreme cases damage to thylakoid constituents can occur (Andersson and Barber, 1996). Both damage to and sustained down-regulation of PSII can be considered to be photoinhibitory (i.e. causing a decrease in the quantum efficiency of photosynthesis; Osmond, 1994) and pote...

show abstract

“…The oldest and most widely accepted idea is that isoprene stabilizes chloroplast membranes (Sharkey and Singsaas, 1995). Thylakoid membranes become leaky at high temperature (Pastenes and Horton, 1996;Bukhov et al, 1999;Schrader et al, 2004;. It was suggested that the positive effect of isoprene might be due to the hydrophobic nature of the molecule, the localization of isoprene synthase enzyme near the thylakoid membranes (Wildermuth and Fall, 1998;Schnitzler et al, 2005), and the high octanol/water partitioning coefficient (Copolovici and Niinemets, 2005).…”

mentioning

confidence: 99%

Increased Thermostability of Thylakoid Membranes in Isoprene-Emitting Leaves Probed with Three Biophysical Techniques

et al. 2011

View full text Add to dashboard Cite

Three biophysical approaches were used to get insight into increased thermostability of thylakoid membranes in isoprene-emittingplants.Arabidopsis (Arabidopsis thaliana) plants genetically modified to make isoprene and Platanus orientalis leaves, in which isoprene emission was chemically inhibited, were used. First, in the circular dichroism spectrum the transition temperature of the main band at 694 nm was higher in the presence of isoprene, indicating that the heat stability of chiral macrodomains of chloroplast membranes, and specifically the stability of ordered arrays of light-harvesting complex IIphotosystem II in the stacked region of the thylakoid grana, was improved in the presence of isoprene. Second, the decay of electrochromic absorbance changes resulting from the electric field component of the proton motive force (DA 515 ) was evaluated following single-turnover saturating flashes. The decay of DA 515 was faster in the absence of isoprene when leaves of Arabidopsis and Platanus were exposed to high temperature, indicating that isoprene protects the thylakoid membranes against leakiness at elevated temperature. Finally, thermoluminescence measurements revealed that S 2 Q B 2 charge recombination was shifted to higher temperature in Arabidopsis and Platanus plants in the presence of isoprene, indicating higher activation energy for S 2 Q B 2 redox pair, which enables isoprene-emitting plants to perform efficient primary photochemistry of photosystem II even at higher temperatures. The data provide biophysical evidence that isoprene improves the integrity and functionality of the thylakoid membranes at high temperature. These results contribute to our understanding of isoprene mechanism of action in plant protection against environmental stresses.

show abstract

Effect of High Temperature on Photosynthesis in Beans (I. Oxygen Evolution and Chlorophyll Fluorescence)

Cited by 154 publications

References 25 publications

MAPK cascades and major abiotic stresses

MAPK cascades and major abiotic stresses

Interactions between Senescence and Leaf Orientation Determine in Situ Patterns of Photosynthesis and Photoinhibition in Field-Grown Rice1

Increased Thermostability of Thylakoid Membranes in Isoprene-Emitting Leaves Probed with Three Biophysical Techniques

Contact Info

Product

Resources

About