24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach

Rothová, Olga; Holá, D.; Kočová, M.; Tůmová, Lenka; Hnilička, František; Hniličková, Helena; Kamlar, Marek; Macek, Tomáš

doi:10.1016/j.steroids.2014.04.006

Cited by 27 publications

(20 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Exogenous application of BRs in pepper (Capsicum annuum) plants appear to mitigate the deleterious effects of drought on photosynthesis by maintaining or increasing the efficient use of light and NPQ in PSII antennae (Hu et al, 2013). Several other studies have demonstrated BR-induced changes in thylakoid structure and the regulation of PSII and ETC in photosynthesis (Dobrikova et al, 2014;Rothova et al, 2014). Therefore, the role of BRs in PSII damage repair and modification of thylakoid structural dynamics deserves further investigation.…”

Section: Photosynthesis Under Abiotic Stressmentioning

confidence: 99%

Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

2015

View full text Add to dashboard Cite

Plants as sessile organisms are continuously exposed to abiotic stress conditions that impose numerous detrimental effects and cause tremendous loss of yield. Abiotic stresses, including high sunlight, confer serious damage on the photosynthetic machinery of plants. Photosystem II (PSII) is one of the most susceptible components of the photosynthetic machinery that bears the brunt of abiotic stress. In addition to the generation of reactive oxygen species (ROS) by abiotic stress, ROS can also result from the absorption of excessive sunlight by the light-harvesting complex. ROS can damage the photosynthetic apparatus, particularly PSII, resulting in photoinhibition due to an imbalance in the photosynthetic redox signaling pathways and the inhibition of PSII repair. Designing plants with improved abiotic stress tolerance will require a comprehensive understanding of ROS signaling and the regulatory functions of various components, including protein kinases, transcription factors, and phytohormones, in the responses of photosynthetic machinery to abiotic stress. Bioenergetics approaches, such as chlorophyll a transient kinetics analysis, have facilitated our understanding of plant vitality and the assessment of PSII efficiency under adverse environmental conditions. This review discusses the current understanding and indicates potential areas of further studies on the regulation of the photosynthetic machinery under abiotic stress.

show abstract

Section: Photosynthesis Under Abiotic Stressmentioning

confidence: 99%

Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

2015

View full text Add to dashboard Cite

show abstract

“…The cited authors claim that BR-induced changes in photosynthetic membranes are probably involved in the stress tolerance of plants. epiBL can also increase photosynthesis yields at even lower concentrations than the PE concentrations required to affect RuBisCO activity (Rothová et al 2014). Moreover, exogenously applied epiBL induces changes in PEs contents in plant tissues (Kamlar et al 2015), to degrees that depend on the developmental stage of leaves (of the same plant) and the epiBL concentration applied (10 -8 or 10 -6 M in the cited experiments).…”

Section: Brassinosteroidsmentioning

confidence: 95%

Plant ecdysteroids: plant sterols with intriguing distributions, biological effects and relations to plant hormones

Tarkowská

Strnad

2016

Planta

View full text Add to dashboard Cite

The present review summarises current knowledge of phytoecdysteroids' biosynthesis, distribution within plants, biological importance and relations to plant hormones. Plant ecdysteroids (phytoecdysteroids) are natural polyhydroxylated compounds that have a four-ringed skeleton, usually composed of either 27 carbon atoms or 28-29 carbon atoms (biosynthetically derived from cholesterol or other plant sterols, respectively). Their physiological roles in plants have not yet been confirmed and their occurrence is not universal. Nevertheless, they are present at high concentrations in various plant species, including commonly consumed vegetables, and have a broad spectrum of pharmacological and medicinal properties in mammals, including hepatoprotective and hypoglycaemic effects, and anabolic effects on skeletal muscle, without androgenic side-effects. Furthermore, phytoecdysteroids can enhance stress resistance by promoting vitality and enhancing physical performance; thus, they are considered adaptogens. This review summarises current knowledge of phytoecdysteroids' biosynthesis, distribution within plants, biological importance and relations to plant hormones.

show abstract

“…Although it is well documented that BR application indeed improves the photosynthetic efficiency and that BRs regulate the photosynthesis under normal and abiotic stress conditions (reviewed in [ 148 ]), the precise mechanism underlying BR-induced effects on photosynthetic components remains elusive. Rothová et al [ 149 ] investigated the effects of BR application on various parts of photosynthetic events in maize and spinach. Interestingly, the results revealed that although the efficiency of the photosynthetic ETC responded negatively to BR treatment in both plants, responses regarding PSII activity were entirely different.…”

Section: Psii Damage and Role Of Hormonesmentioning

confidence: 99%

“…While a positive effect of BR treatment was noted in the OEC and PSII units in maize, contradictory results were reported in spinach. Similarly, the maize plants exhibited a positive influence of BR treatment on the accumulation of photosynthetic pigments; however, this was not true for the spinach plants [ 149 ]. These findings pose an important question regarding the possible differences in the PSII response to BR treatment in various plants.…”

Section: Psii Damage and Role Of Hormonesmentioning

confidence: 99%

Current Understanding of the Interplay between Phytohormones and Photosynthesis under Environmental Stress

Gururani

Mohanta

Bae

2015

IJMS

113

View full text Add to dashboard Cite

Abiotic stress accounts for huge crop losses every year across the globe. In plants, the photosynthetic machinery gets severely damaged at various levels due to adverse environmental conditions. Moreover, the reactive oxygen species (ROS) generated as a result of stress further promote the photosynthetic damage by inhibiting the repair system of photosystem II. Earlier studies have suggested that phytohormones are not only required for plant growth and development, but they also play a pivotal role in regulating plants’ responses to different abiotic stress conditions. Although, phytohormones have been studied in great detail in the past, their influence on the photosynthetic machinery under abiotic stress has not been studied. One of the major factors that limits researchers fromelucidating the precise roles of phytohormones is the highly complex nature of hormonal crosstalk in plants. Another factor that needs to be elucidated is the method used for assessing photosynthetic damage in plants that are subjected to abiotic stress. Here, we review the current understanding on the role of phytohormones in the photosynthetic machinery under various abiotic stress conditions and discuss the potential areas for further research.

show abstract

24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach

Cited by 27 publications

References 84 publications

Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

Plant ecdysteroids: plant sterols with intriguing distributions, biological effects and relations to plant hormones

Current Understanding of the Interplay between Phytohormones and Photosynthesis under Environmental Stress

Contact Info

Product

Resources

About