Functional deficiency of phytochrome B improves salt tolerance in rice

Kwon, Choon Tak; Song, Giha; Kim, Suk Hwan; Han, Jae-Hyuk; Yoo, Soo Cheul; An, Gynheung; Kang, Kiyoon; Paek, Nam‐Chon

doi:10.1016/j.envexpbot.2017.12.020

Cited by 17 publications

(10 citation statements)

References 80 publications

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“…The photoreceptor protein phyB plays a key role in the sensing of light and heat leading to the activation and/or modulation of many different developmental programs and environmental responses (1,2). Recent studies revealed that in addition to light and heat, phyB is involved in responses of plants to chilling, salt, drought, pathogen, and cold stresses (43,46,(53)(54)(55). To regulate plant responses to environmental stimuli, phyB interacts with, or affects the function of, multiple proteins including transcriptional regulators such as PHYTOCHROME-INTERACTING TRANSCRIPTION FACTORS (PIFs), C-REPEAT/DRE-BINDING FACTORS (CBFs), MYELOBLASTOSIS DOMAIN PROTEINS (MYBs), and CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR (CAMTA), binds to different promoters, and/or associates with large multi protein complexes called photobodies (1)(2)(3)(4)(5)(6)(43)(44)(45)(46)(47)(48)(49).…”

Section: Discussionmentioning

confidence: 99%

Phytochrome B regulates reactive oxygen signaling during abiotic and biotic stress in plants

Fichman

Xiong

Sengupta

et al. 2021

Preprint

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Plants are essential for life on Earth converting light into chemical energy in the form of sugars. To adjust for changes in light intensity and quality, and to become as efficient as possible in harnessing light, plants utilize multiple light receptors, signaling, and acclimation mechanisms. In addition to altering plant metabolism, development and growth, light cues sensed by some photoreceptors, such as phytochromes, impact on many plant responses to biotic and abiotic stresses. Central for plant responses to different stresses are reactive oxygen species (ROS) that function as key signaling molecules. Recent studies demonstrated that respiratory burst oxidase homolog (RBOH) proteins that reside at the plasma membrane and produce ROS at the apoplast play a key role in plant responses to different biotic and abiotic stresses. Here we reveal that phytochrome B (phyB) and RBOHs function as part of a key regulatory module that controls ROS production, transcript expression, and plant acclimation to excess light stress. We further show that phyB can regulate ROS production during stress even if it is restricted to the cytosol, and that phyB, RBOHD and RBOHF co-regulate thousands of transcripts in response to light stress. Surprisingly, we found that phyB is also required for ROS accumulation in response to heat, wounding, cold, and bacterial infection. Taken together, our findings reveal that phyB plays a canonical role in plant responses to biotic and abiotic stresses, regulating ROS production, and that phyB and RBOHs function in the same pathway.Significant StatementAbiotic and biotic stresses cause extensive losses to agricultural production and threaten global food security. Augmenting plant resilience to stressful conditions requires understanding of how plants sense stress. Here we report that the sensing of different abiotic and biotic stresses that result in the production of the key stress-response signaling molecules, reactive oxygen species, requires the plant photoreceptor protein phytochrome B. We further show that in contrast to its many nuclear functions, phytochrome B regulates reactive oxygen production by plasma membrane-localized respiratory burst oxidase homologs while localized to the cytosol. Our findings reveal the existence of a rapid stress response regulatory mechanism requiring phytochrome B and reactive oxygen species, essential for plant acclimation to stress.

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Section: Discussionmentioning

confidence: 99%

Phytochrome B regulates reactive oxygen signaling during abiotic and biotic stress in plants

Fichman

Xiong

Sengupta

et al. 2021

Preprint

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“…Moreover, photo-activated phyB interacts with PIFs, resulting in their degradation and consequently releasing the inhibitory effect on photomorphogenesis (Castillon et al, 2007). OsPIL14 interacts with rice phyB, and deficiency of OsPHYB improves salt tolerance (Cordeiro et al, 2016;Kwon et al, 2018). Therefore, PIF proteins play crucial roles in linking light and salt stress.…”

Section: Discussionmentioning

confidence: 99%

PHYTOCHROME-INTERACTING FACTOR-LIKE14 and SLENDER RICE1 Interaction Controls Seedling Growth under Salt Stress

Tang

et al. 2020

Plant Physiol.

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Early seedling development and emergence from the soil, which are critical for plant growth and important for crop production, are controlled by internal factors, such as phytohormones, and external factors, such as light and salt. However, little is known about how light and salt signals are integrated with endogenous cues in controlling plant physiological processes. Here, we show that overexpression of rice (Oryza sativa) PHYTOCHROME-INTERACTING FACTOR-LIKE14 (OsPIL14) or loss of function of the DELLA protein SLENDER RICE1 (SLR1) promotes mesocotyl and root growth, specifically in the dark and under salt stress. Furthermore, salt induces OsPIL14 turnover but enhances SLR1 accumulation. OsPIL14 directly binds to the promoter of cell elongation-related genes and regulates their expression. SLR1 physically interacts with OsPIL14 and negatively regulates its function. Our study reveals a mechanism by which the OsPIL14-SLR1 transcriptional module integrates light and gibberellin signals to fine-tune seedling growth under salt stress, enhancing understanding about how crops adapt to saline environments.

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“…For example, the transporter high‐affinity K + transporters (HKTs) played a pivotal role in avoiding the accumulation of a harmful Na + concentration and enhanced salinity tolerance (Deinlein et al, 2014). In rice, phyB repressed the expression of putative OsHKTs genes, a convenient regulation that was effective on plant salt‐tolerance induction, considering the lower content of Na + found in rice phyB mutants (Kwon et al, 2018). Therefore, these perspectives open a new avenue for up‐stream activity of the phyB family in the salt stress response.…”

Section: Salt Stressmentioning

confidence: 99%

“…Thus, it is not surprising that phys were previously described to regulate responses to diverse abiotic and biotic stresses (Carvalho, Campos, & Azevedo, 2011), such as salt stress (Indorf, Cordero, Neuhaus, & Rodríguez‐Franco, 2007), drought stress (Kraepiel et al, 1994), low and high‐temperature stress (Williams, Pellett, & Klein, 1972; Foreman et al, 2011) and high light (Wellmann, Schneider‐Zeibert, & Beggs, 1984). Highlighting the phy type B family shows some similar responses among species and many research groups have targeted their efforts to understand phyB‐modulated stress responses, because such responses could be altered in the same species, e.g., phyB1 and phyB2 gene duplication controlling different stress acclimation responses (Arico et al, 2019; Gavassi, Monteiro, Campos, Melo, & Carvalho, 2017; Kreslavski et al, 2015; Kwon et al, 2018; Yoo et al, 2017). Therefore, in this review, we summarised the phyB‐modulated stress responses to elucidate future research for plant breeding.…”

Section: Introductionmentioning

confidence: 99%

Phytochrome type B family: The abiotic stress responses signaller in plants

Silva

D’Amico-Damião

Carvalho

2020

Annals of Applied Biology

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Photoreceptors are primarily known as key photomorphogenic modulators of various physiological events during plant development. Although there are different groups of photoreceptors, the phytochrome B (phyB) family mediates developmental responses in a wide range of plant species, from seed germination to flowering. In addition, these molecules also regulate abiotic stress acclimation responses, such as salinity, drought, low/high temperature, high light and heavy metals. The signalling pathways mediated by phyB could enhance plant resistance to environmental stresses, as phyB photoreceptors reduce leaf transpiration, increase the antioxidant system, enhance protective pigments and increase the expression of genes related to plant stress acclimation. Thus, the elucidation of positive or negative roles for phyB in these stress tolerance characteristics would provide essential knowledge for genetic engineering, improving plant growth and development in critical environments. In this review, we cover the main findings on how the phyB family works to modulate abiotic stress by discussing biochemical and molecular aspects of the underlying mechanisms operated by these photoreceptors.

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Functional deficiency of phytochrome B improves salt tolerance in rice

Cited by 17 publications

References 80 publications

Phytochrome B regulates reactive oxygen signaling during abiotic and biotic stress in plants

Phytochrome B regulates reactive oxygen signaling during abiotic and biotic stress in plants

PHYTOCHROME-INTERACTING FACTOR-LIKE14 and SLENDER RICE1 Interaction Controls Seedling Growth under Salt Stress

Phytochrome type B family: The abiotic stress responses signaller in plants

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