Publications by authors named "Wenrong Tan"

Plants dynamically modulate their growth and development to acclimate to the fluctuating light environment via a complex phytohormone network. However, the dynamic molecular regulatory mechanisms underlying how plants regulate phytohormones during skotomorphogenesis and photomorphogenesis are largely unknown. Here, we identified a HD-ZIP II transcription factor, HOMEODOMAIN ARABIDOPSIS THALIANA1 (HAT1), as a key node that modulates the dose effects of brassinosteroids (BRs) and auxin on hypocotyl growth during skotomorphogenesis and photomorphogenesis.

View Article and Find Full Text PDF

Photoperiod is a crucial environmental cue for phenological responses, including growth cessation and winter dormancy in perennial woody plants. Two regulatory modules within the photoperiod pathway explain bud dormancy induction in poplar (Populus spp.): the circadian oscillator LATE ELONGATED HYPOCOTYL 2 (LHY2) and GIGANTEA-like genes (GIs) both regulate the key target for winter dormancy induction FLOWERING LOCUS T2 (FT2).

View Article and Find Full Text PDF

During summer, plants often experience increased light inputs and high temperatures, two major environmental factors with contrasting effects on thermomorphological traits. The integration of light and temperature signaling to control thermomorphogenesis in plants is critical for their acclimation in such conditions, but the underlying mechanisms remain largely unclear. We found that heat shock transcription factor 1d (HSFA1d) and its homologs are necessary for plant thermomorphogenesis during the day.

View Article and Find Full Text PDF
Article Synopsis
  • - Brassinosteroid (BR) is essential for plant growth and helps regulate responses to environmental factors like nitrogen availability, with BES1/BZR1 being key regulators in its signaling process.
  • - Under low nitrogen, BES1 promotes lateral root growth by enhancing nitrate uptake, while LBD37 acts as a negative repressor, creating a balance in nitrogen signaling.
  • - The interaction between BES1 and LBD37 is crucial, as BES1 inhibits LBD37's repression of nitrogen-responsive genes, integrating BR and nitrogen signals for effective root foraging.
View Article and Find Full Text PDF

The plant defense hormone, salicylic acid (SA), plays essential roles in immunity and systemic acquired resistance. Salicylic acid induced by the pathogen is perceived by the receptor nonexpressor of pathogenesis-related genes 1 (NPR1), which is recruited by TGA transcription factors to induce the expression of pathogenesis-related (PR) genes. However, the mechanism by which post-translational modifications affect TGA's transcriptional activity by salicylic acid signaling/pathogen infection is not well-established.

View Article and Find Full Text PDF

Populus canker is a widespread disease that seriously threatens the survival of trees. Phytohormones are considered as effective chemical molecules improving plant resistance to various diseases. Ethylene is an important phytohormone that is extensively involved in the regulation of plant growth, development, and stress responses, but how ethylene and ethylene signaling regulates defense responses in woody plants is still unclear.

View Article and Find Full Text PDF

Trichome initiation and leaf growth are two critical developmental processes in the plant life cycle, which need to be optimized in accordance with developmental stage and immediate surroundings. To a large extent, this optimization is achieved by fine-tuning of hormonal pathways, including the gibberellin (GA) pathway. However, the mechanism by which plants control GA homeostasis to optimize these two developmental processes is unknown.

View Article and Find Full Text PDF
Article Synopsis
  • Arabidopsis GSK3-like kinases, specifically BIN2, are shown to play a significant role in chloroplast development by interacting with and phosphorylating transcription factors GLK1 and GLK2.
  • Mutations in BIN2 lead to abnormal chloroplast formation and affect plant responses to brassinosteroids (BRs) and light conditions.
  • The study uncovers how BRs can repress the BIN2-GLK interaction, thereby influencing chloroplast function and contributing to the plant's adaptation during photomorphogenesis.
View Article and Find Full Text PDF

Anthocyanin is part of secondary metabolites, which is induced by environmental stimuli and developmental signals, such as high light and sucrose. Anthocyanin accumulation is activated by the MYB-bHLH-WD40 (MBW) protein complex in plants. But the evidence of how plants maintain anthocyanin in response to signals is lacking.

View Article and Find Full Text PDF
Article Synopsis
  • Brassinosteroids (BRs), particularly brassinolide (BL), enhance a plant's ability to tolerate cold stress by affecting cold-related genes and antioxidant enzyme activity.
  • The study found that hydrogen peroxide (H₂O₂) and nitric oxide (NO) are important signaling molecules in stress response, but their interaction in the context of BR-induced stress tolerance needs further exploration.
  • DMTU, a scavenger of H₂O₂, blocked NO production related to BRs, while PTIO, a NO scavenger, effectively reduced the impacts of BRs on gene expression and photosystem efficiency, suggesting NO plays a bigger role in BRs-induced plant defenses than H₂O₂.
View Article and Find Full Text PDF

Drought is a major threat to plant growth and crop productivity. The phytohormone abscisic acid (ABA) plays a critical role in plant response to drought stress. Although ABA signaling-mediated drought tolerance has been widely investigated in Arabidopsis thaliana, the feedback mechanism and components negatively regulating this pathway are less well understood.

View Article and Find Full Text PDF

Brassinosteroids (BRs) are growth-promoting plant hormones that play a crucial role in biotic stress responses. Here, we found that BR treatment increased nitric oxide (NO) accumulation, and a significant reduction of virus accumulation in Arabidopsis thaliana. However, the plants pre-treated with NO scavenger [2-(4-carboxyphenyl)-4,4,5,5-tetramethyl-imidazoline-1-1-oxyl-3-oxide (PTIO)] or nitrate reductase (NR) inhibitor (tungstate) hardly had any NO generation and appeared to have the highest viral replication and suffer more damages.

View Article and Find Full Text PDF
Article Synopsis
  • - Arabidopsis thaliana GLKs transcription factors are essential for regulating photosynthesis and chloroplast development, but their role in plant virus resistance is not well understood.
  • - Research revealed that the double mutant glk1glk2 is more vulnerable to Cucumber mosaic virus (CMV) and experiences greater damage compared to wild-type plants, while single mutants glk1 or glk2 show similar responses to wild-type.
  • - The findings suggest that GLKs enhance virus resistance by activating the antioxidant system and promoting defense genes, with evidence pointing to the involvement of salicylic acid (SA) and jasmonic acid (JA) in this protective role.
View Article and Find Full Text PDF

Arabidopsis thaliana homeodomain-leucine zipper protein 1 (HAT1) belongs to the homeodomain-leucine zipper (HD-Zip) family class II that plays important roles in plant growth and development as a transcription factor. To elucidate further the role of HD-Zip II transcription factors in plant defense, the A. thaliana hat1, hat1hat3 and hat1hat2hat3 mutants and HAT1 overexpression plants (HAT1OX) were challenged with Cucumber mosaic virus (CMV).

View Article and Find Full Text PDF

Recent studies reported that brassinosteroids (BRs) can induce plant tolerance to different environmental stresses via the nitric oxide (NO) signaling pathway. Previous reports have indicated that alternative oxidase (AOX) plays an important role in plants under various stresses. The mechanisms governing how NO is involved as a signal molecule which connects BR with AOX in regulating stress tolerance are still unknown.

View Article and Find Full Text PDF

Parkinson's disease (PD) is a progressive neurodegenerative disease characterized by motor and nonmotor signs and symptoms. To date, many studies of PD have focused on its cardinal motor symptoms. To study the nonmotor signs of early PD, we investigated the reactions solicited by heat pain stimuli in early untreated PD patients without pain using fMRI.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: