Light participates in the auxin‐dependent regulation of plant growth

Lv, Bingsheng; Zhu, Jiayong; Kong, Xiangpei; Ding, Zhaojun

doi:10.1111/jipb.13036

Cited by 17 publications

(6 citation statements)

References 18 publications

(31 reference statements)

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“…These pathways work together to enhance SWR1 complex‐mediated H2A.Z deposition at YUC9 to repress its expression, leading to reduced IAA biosynthesis and inhibited hypocotyl elongation (Figure 8B). Previous studies showed that light controls plant growth through regulation of auxin biosynthesis and signaling (Xu et al, 2018; Chen et al, 2020; Mao et al, 2020; Yang et al, 2020b; Lv et al, 2021). This study provides a new insight into the mechanism of phyB‐mediated photomorphogenesis, which involves phyB regulation of H2A.Z deposition at YUC9 .…”

Section: Discussionmentioning

confidence: 99%

Phytochrome B interacts with SWC6 and ARP6 to regulate H2A.Z deposition and photomorphogensis in Arabidopsis

Wei

Wang

et al. 2021

JIPB

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Light serves as a crucial environmental cue which modulates plant growth and development, and which is controlled by multiple photoreceptors including the primary red light photoreceptor, phytochrome B (phyB). The signaling mechanism of phyB involves direct interactions with a group of basic helix‐loop‐helix (bHLH) transcription factors, PHYTOCHROME‐INTERACTING FACTORS (PIFs), and the negative regulators of photomorphogenesis, COP1 and SPAs. H2A.Z is an evolutionarily conserved H2A variant which plays essential roles in transcriptional regulation. The replacement of H2A with H2A.Z is catalyzed by the SWR1 complex. Here, we show that the Pfr form of phyB physically interacts with the SWR1 complex subunits SWC6 and ARP6. phyB and ARP6 co‐regulate numerous genes in the same direction, some of which are associated with auxin biosynthesis and response including YUC9, which encodes a rate‐limiting enzyme in the tryptophan‐dependent auxin biosynthesis pathway. Moreover, phyB and HY5/HYH act to inhibit hypocotyl elongation partially through repression of auxin biosynthesis. Based on our findings and previous studies, we propose that phyB promotes H2A.Z deposition at YUC9 to inhibit its expression through direct phyB‐SWC6/ARP6 interactions, leading to repression of auxin biosynthesis, and thus inhibition of hypocotyl elongation in red light.

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Section: Discussionmentioning

confidence: 99%

Phytochrome B interacts with SWC6 and ARP6 to regulate H2A.Z deposition and photomorphogensis in Arabidopsis

Wei

Wang

et al. 2021

JIPB

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“…Early studies on plant responses to shading mainly focused on the verification of SAR-related gene functions [ 28 , 29 ]. Many studies have shown that PIFs are positive regulators of SAR.…”

Section: Mechanism Of Light and Auxin Integration In Sar And Strmentioning

confidence: 99%

Integration of Light and Auxin Signaling in Shade Plants: From Mechanisms to Opportunities in Urban Agriculture

Xie

Cheng

Hou

et al. 2022

IJMS

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With intensification of urbanization throughout the world, food security is being threatened by the population surge, frequent occurrence of extreme climate events, limited area of available cultivated land, insufficient utilization of urban space, and other factors. Determining the means by which high-yielding and high-quality crops can be produced in a limited space is an urgent priority for plant scientists. Dense planting, vertical production, and indoor cultivation are effective ways to make full use of space and improve the crop yield. The results of physiological and molecular analyses of the model plant species Arabidopsis thaliana have shown that the plant response to shade is the key to regulating the plant response to changes in light intensity and quality by integrating light and auxin signals. In this study, we have summarized the major molecular mechanisms of shade avoidance and shade tolerance in plants. In addition, the biotechnological strategies of enhancing plant shade tolerance are discussed. More importantly, cultivating crop varieties with strong shade tolerance could provide effective strategies for dense planting, vertical production, and indoor cultivation in urban agriculture in the future.

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“…Previous studies have shown that auxin plays an essential role in plant growth and female gametophyte development (Ceccato et al, 2013;Kneuper et al, 2020;Lv et al, 2020). To determine whether auxin distribution is altered in the grdp2-3 mutant, we crossed the DR5:GFP reporter line and examined the spatial distribution of auxin (Benkova et al, 2003) in the grdp2-3 plants.…”

Section: Auxin Distribution During Gametogenesis Is Disrupted In Grdp2 Ovulementioning

confidence: 99%

The Glycine-Rich Domain Protein GRDP2 Regulates Ovule Development via the Auxin Pathway in Arabidopsis

et al. 2021

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The glycine-rich domain proteins (GRDP) have been functionally implicated in the cell wall structure, biotic, and abiotic stress responses. However, little is known about GRDP genes in female gametophyte development of Arabidopsis. This study shows that GRDP2, a GRDP, plays a crucial role in female gametophyte development. In GRDP2 overexpression lines, grdp2-3, the embryo sacs were arrested at FG1 and no nucleus stages. Furthermore, callose staining shows that cell plate formation during megasporogenesis is disturbed in grdp2-3. In contrast, the pollen development is not affected in grdp2-3. The expression patterns of auxin-specific marker lines in female gametophytes showed that the auxin distribution and transport were significantly changed during megagametogenesis in grdp2-3. In addition, compared with the membrane-localized pattern of PIN1, PIN2, and PIN7 in WT, the signals were detected in the cytoplasm in grdp2-3. Together, our data suggest that GRDP2 plays an essential role in auxin-mediated female gametophyte development.

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Light participates in the auxin‐dependent regulation of plant growth

Cited by 17 publications

References 18 publications

Phytochrome B interacts with SWC6 and ARP6 to regulate H2A.Z deposition and photomorphogensis in Arabidopsis

Phytochrome B interacts with SWC6 and ARP6 to regulate H2A.Z deposition and photomorphogensis in Arabidopsis

Integration of Light and Auxin Signaling in Shade Plants: From Mechanisms to Opportunities in Urban Agriculture

The Glycine-Rich Domain Protein GRDP2 Regulates Ovule Development via the Auxin Pathway in Arabidopsis

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