Emerging Roles and New Paradigms in Signaling Mechanisms of Plant Cryptochromes

Mishra, Sushma; Khurana, Jitendra P.

doi:10.1080/07352689.2017.1348725

Cited by 54 publications

(31 citation statements)

References 227 publications

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“…Drought is one of the most critical factors of plant production in agricultural systems (Lesk et al, 2016; González-Villagra et al, 2017; Sseremba et al, 2018). Given the evidence regarding the mechanisms that control plant responses to drought stress (Bechtold, 2018; Hussain et al, 2018; Meng, 2018), we would not be surprised that crys are an important part of these responses (Mishra and Khurana, 2017). Previous studies have demonstrated that crys play an interesting role in Arabidopsis drought stress tolerance (Mao et al, 2005).…”

Section: Osmotic Stress Acclimation: How Do Cryptochromes Regulate Thmentioning

confidence: 99%

“…In fact, variations in light are sensed by photoreceptors, which are photoreversible proteins with a prosthetic group/cofactor or an intrinsic amino acid (tryptophan) as a chromophore. Currently, five photoreceptor systems have been identified in higher plants: phytochromes (phys), which absorb wavelengths of red (600–700 nm) and far-red light (700–750 nm); blue light (BL)/ultraviolet (UV)-A photoreceptors (315–500 nm), which are represented by cryptochromes (crys), phototropins (phots) and zeitlupes (ZTL, FKF1, and LKP2); and UV Resistance Locus 8 (UVR8) photoreceptor, which operate through UV-B light (280–315 nm) (Chen and Chory, 2011; Christie et al, 2012; Ito et al, 2012; Jenkins, 2014; Christie et al, 2015; Mishra and Khurana, 2017). Although there are several classes of plant photoreceptors, phytochromes were the first type of photoreceptor discovered and are the most characterized.…”

Section: Introductionmentioning

confidence: 99%

“…The PHR domain contains the non-covalent binding site for 5, 10-methenyl tetrahydrofolate (MTHF) and flavin adenine dinucleotide (FAD), the two chromophores. FAD is a chromophore for BL that triggers photomorphogenesis, and the MTHF chromophore is a derivative of pterine that acts in the UV-A region, transferring excitation energy to FAD, which is a catalytic cofactor (Mishra and Khurana, 2017). In the model plant Arabidopsis thaliana , three crys were identified (cry1, cry2, and cry3).…”

Section: Introductionmentioning

confidence: 99%

“…For instance, cry1 primarily regulates photomorphogenic responses related to the inhibition of hypocotyl elongation, anthocyanin accumulation and cotyledon expansion, while cry2 plays a role in the hypocotyl inhibition, circadian clock and photoperiod-dependent flowering (Yu et al, 2010). However, cry3 is a DASH protein located in chloroplasts and mitochondria (Kleine et al, 2003), which works to repair UV-damaged DNA in a light-dependent manner (Mishra and Khurana, 2017). Overall, cryptochrome-dependent signaling pathways remain unclear because these physiological responses change with BL intensity (Kami et al, 2010) as well as with the plant species in question (Yang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Cryptochrome-Related Abiotic Stress Responses in Plants

D’Amico-Damião

Carvalho

2018

Front. Plant Sci.

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It is well known that light is a crucial environmental factor that has a fundamental role in plant growth and development from seed germination to fruiting. For this process, plants contain versatile and multifaceted photoreceptor systems to sense variations in the light spectrum and to acclimate to a range of ambient conditions. Five main groups of photoreceptors have been found in higher plants, cryptochromes, phototropins, UVR8, zeitlupes, and phytochromes, but the last one red/far red wavelengths photoreceptor is the most characterized. Among the many responses modulated by phytochromes, these molecules play an important role in biotic and abiotic stress responses, which is one of the most active research topics in plant biology, especially their effect on agronomic traits. However, regarding the light spectrum, it is not surprising to consider that other photoreceptors are also part of the stress response modulated by light. In fact, it has become increasingly evident that cryptochromes, which mainly absorb in the blue light region, also act as key regulators of a range of plant stress responses, such as drought, salinity, heat, and high radiation. However, this information is rarely evidenced in photomorphogenetic studies. Therefore, the scope of the present review is to compile and discuss the evidence on the abiotic stress responses in plants that are modulated by cryptochromes.

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Section: Osmotic Stress Acclimation: How Do Cryptochromes Regulate Thmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cryptochrome-Related Abiotic Stress Responses in Plants

D’Amico-Damião

Carvalho

2018

Front. Plant Sci.

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“…Although detailed information about the way that UV-A radiation mediates leaf expansion is lacking, UV-A exposure may upregulate the expression of cry1a (Mariz-Ponte et al, 2018), as cry-impaired plants have exhibited significantly smaller leaf blades (Kozuka et al, 2005). Thus, it is assumed that upregulation of cryptochrome by UV-A promotes leaf expansion (Mishra and Khurana, 2017). In addition to leaf size, plant height was also slightly increased by UV-A radiation (Fig.…”

Section: Treatmentsmentioning

confidence: 99%

Ultraviolet-A Radiation Stimulates Growth of Indoor Cultivated Tomato (Solanum lycopersicum) Seedlings

Kang¹,

Zhang²,

Zhang³

et al. 2018

horts

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Ultraviolet-A (UV-A) is the main component of UV radiation in nature. However, its role on plant growth, to a large extent, remains unknown. In this study, tomato (Solanum lycopersicum 'Beijing Cherry Tomato') seedlings were cultivated in an controlled environment in which UV-A radiation was provided by UV-A fluorescent lamps (l max = 369 nm) with a fluence rate of 2.28 W · m L2 . The photoperiod of UV-A radiation was 0, 4, 8, and 16 hours, which corresponds to control, UV-A4, UV-A8, and UV-A16 treatments, respectively. The photosynthetic photon flux density (PPFD) was 220 mmol · m L2 · s L1 , which was provided by light-emitting diodes (LEDs) with a blue/red light ratio of 1:9, the photoperiod of PPFD was 16 hours. We showed that supplementing 8 and 16 hours of UV-A to visible radiation (400-700 nm) stimulated plant biomass production by 29% and 33%, respectively, compared with that of control. This resulted mainly from larger leaves (i.e., 22% and 31% in 8 and 16 hours UV-A, respectively), which facilitated light capture. Supplemental UV-A also enhanced photosynthetic capacity, as indicated by greater net photosynthesis rates in response to CO 2 under saturating PPFD. Furthermore, the greatest stomatal conductance (g S ) value was observed in UV-A16, followed by UV-A8, which correlated with the greater stomatal density in the corresponding treatments. Moreover, supplemental UV-A did not induce any stress, as the maximum quantum efficiency of photosynthetic system II (PSII) (F v /F m ) remained ' '0.82 in all treatments. Similarly, chlorophyll content and leaf mass area (LMA) were also unaffected by UV-A radiation. Taken together, we conclude that supplementing reasonable levels of UV-A to visible radiation stimulates growth of indoor cultivated tomato seedlings.

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Cryptochromes: How Blue Light Perception Influences Plant Physiology

Fantini

Facella

2020

Encyclopedia of Life Sciences

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Light plays a pivotal role in several physiological processes during plant growth, development and adaptation. Plants sense and respond to fluctuating light conditions using various photoreceptors such as phytochromes, cryptochromes and phototropins. In particular, cryptochromes are able to monitor, capture and transmit the stimuli of UVA/blue light in order to promote photomorphogenesis and regulate many aspects of plant development and growth including seed germination and seedling de‐etiolation, flowering induction, circadian rhythms and stress responses. Cryptochromes influence all these processes by modulating the expression pattern of several genes; such massive regulation is fundamental for optimising all physiological properties of plants throughout their life cycle. Key Concepts Light is essential for plant life. Plants use photoreceptors to sense and monitor quality, direction, intensity and length of light stimulus. Cryptochromes play fundamental roles in plant development. Cryptochromes are highly conserved among plant species. Cryptochromes regulate many light‐dependent physiological processes.

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Emerging Roles and New Paradigms in Signaling Mechanisms of Plant Cryptochromes

Cited by 54 publications

References 227 publications

Cryptochrome-Related Abiotic Stress Responses in Plants

Cryptochrome-Related Abiotic Stress Responses in Plants

Ultraviolet-A Radiation Stimulates Growth of Indoor Cultivated Tomato (Solanum lycopersicum) Seedlings

Cryptochromes: How Blue Light Perception Influences Plant Physiology

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