Article
Biochemistry & Molecular Biology
Shiv Mani Dubey, Soeun Han, Nathan Stutzman, Michael J. Prigge, Eva Medvecka, Matthieu Pierre Platre, Wolfgang Busch, Matyas Fendrych, Mark Estelle
Summary: The phytohormone auxin triggers root growth inhibition within seconds via a non-transcriptional pathway. The AFB1 protein plays a crucial role in this rapid response, and its N-terminal region, including the F-box domain and residues contributing to auxin binding, is essential for its specific function. A substitution of the N-terminal region of AFB1 disrupts its cytoplasmic localization and activity in rapid root growth inhibition. Moreover, AFB1 is involved in calcium influx triggered by auxin and negatively regulates lateral root formation and transcription of auxin-induced genes.
Article
Plant Sciences
Boyuan Mao, Hiroki Takahashi, Hideyuki Takahashi, Nobuharu Fujii
Summary: Root gravitropism affects root hydrotropism, and the intensity of interference differs among plant species. This study compared root hydrotropism in different natural variants of Arabidopsis under stationary conditions and found variations in root hydrotropism within the variants. The comparison also classified natural variants that decreased root hydrotropism into two types: one type with weaker root gravitropism and hydrotropism, and the other type with weaker hydrotropism but similar gravitropism compared to the normal type. However, all examined Arabidopsis variants showed facilitated root hydrotropism under clinorotation. These findings suggest that the interference of root gravitropism with root hydrotropism is conserved among Arabidopsis variants, despite differences in the intensity of interference.
JOURNAL OF PLANT RESEARCH
(2022)
Article
Plant Sciences
Aiqing Sun, Chunmei Yin, Min Ma, Ying Zhou, Xiaoyun Zheng, Xiaoyu Tu, Yuda Fang
Summary: This study reveals the involvement of the histone variant H2A.Z in the regulation of plant growth through auxin signaling. It shows that auxin promotes the eviction of H2A.Z from auxin-responsive genes, activating their transcription and influencing plant growth.
Article
Biochemical Research Methods
Inigo Saiz-Fernandez, Martin Cerny, Jan Skalak, Bretislav Brzobohaty
Summary: The study optimized a method for establishing split-root systems in young Arabidopsis thaliana seedlings, finding that partial de-rooting is less stressful and can be used in drought experiments. Additionally, the system allows for applying water-soluble compounds with minimal effects of rehydration.
Article
Plant Sciences
Drishti Mandal, Saptarshi Datta, Giridhar Raveendar, Pranab Kumar Mondal, Ronita Nag Chaudhuri
Summary: RAV1 gene plays an important role in regulating root growth. The expression of RAV1 gene is suppressed in mutant, resulting in impaired cytokinin signaling and altered auxin transport and distribution, ultimately affecting the meristem size of the root.
Article
Plant Sciences
Hirotomo Takatsuka, Anna Sasaki, Naoki Takahashi, Michitaro Shibata, Keiko Sugimoto, Maho Tanaka, Motoaki Seki, Masaaki Umeda
Summary: Root hairs are important for water and nutrient uptake from the soil and are controlled by both developmental programs and environmental factors. Phytohormones, such as auxin, ethylene, and cytokinin, play crucial roles in root hair growth. In this study, it was discovered that cytokinin promotes root hair elongation by up-regulating a transcription factor called RSL4, independently of auxin or ethylene signaling. These findings provide new insights into the regulatory mechanisms of root hair growth.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Biochemistry & Molecular Biology
Nathan L. Mellor, Ute Voss, Alexander Ware, George Janes, Duncan Barrack, Anthony Bishopp, Malcolm J. Bennett, Markus Geisler, Darren M. Wells, Leah R. Band
Summary: Members of the B family of membrane-bound ATP-binding cassette (ABC) transporters play important roles in auxin efflux in plants. This study integrates ABCB localization data into a multicellular model to predict the impact of ABCB-mediated auxin transport on organ-scale distribution. The results suggest that ABCBs enable auxin efflux independently of PINs, but PINs predominantly mediate auxin efflux when co-localized with ABCBs.
Article
Plant Sciences
Toyosi Ijato, Romano Porras-Murillo, Pascal Ganz, Uwe Ludewig, Benjamin Neuhaeuser
Summary: Conventional wheat production relies on nitrogen fertilizers, with ammonium-nitrate showing superior growth effects. However, high concentrations of sole ammonium can lead to toxicity and reduced biomass accumulation. Through studying wheat's ammonium transporter, TaAMT1 was found to increase expression in response to nitrogen starvation and ammonium resupply.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Plant Sciences
Dimitris Templalexis, Dikran Tsitsekian, Chen Liu, Gerasimos Daras, Jan Simura, Panagiotis Moschou, Karin Ljung, Polydefkis Hatzopoulos, Stamatis Rigas
Summary: A proton-coupled potassium transporter plays an important role in regulating root hair development and root gravitropism in Arabidopsis. This transporter facilitates polar auxin transport, which is essential for cell differentiation and gravitropic response in root epidermal cells. The study highlights the importance of HAK/KUP/KT proton-coupled K+ transporters in plant development.
Article
Plant Sciences
Deok Hyun Seo, Haewon Jeong, Yang Do Choi, Geupil Jang
Summary: The root endodermis forms a selective barrier to prevent solute diffusion into the vasculature by depositing hydrophobic compounds in cell walls to form the Casparian strip. Auxin plays a key role in regulating the division of root endodermal cells, while PGP1 and PGP19 are involved in this regulation by mediating auxin flow.
Article
Plant Sciences
Ritu Dixit, Lalit Agrawal, Suchi Srivastava, Puneet Singh Chauhan
Summary: The study demonstrates that the inoculation of Paenibacillus lentimorbus B-30488 can promote plant growth under salinity and drought stress by modulating defense enzymes, phytohormones, and gene expression related to root system architecture. It is involved in altering root architecture, growth regulation, and enhancing plant growth in stress conditions.
JOURNAL OF PLANT GROWTH REGULATION
(2022)
Article
Biochemistry & Molecular Biology
Chang Pyo Hong, Jinsoo Kim, Jinsu Lee, Seung-Il Yoo, Wonsil Bae, Kyoung Rok Geem, Jin Yu, Inbae Jang, Ick Hyun Jo, Hyunwoo Cho, Donghwan Shim, Hojin Ryu
Summary: Gibberellins play important roles in plant growth and development, with PgGID1s in Panax ginseng showing evolutionary conservation in genetic and physiological functions. Exogenous GA treatment enhances secondary root growth, while a GA biosynthetic inhibitor reduces root growth in P. ginseng. Transcriptional network regulating root secondary growth in P. ginseng is closely associated with cell wall biogenesis, the cell cycle, the jasmonic acid response, and nitrate assimilation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Ximing Che, Bessie L. L. Splitt, Magnus T. T. Eckholm, Nathan D. D. Miller, Edgar P. P. Spalding
Summary: Gravitropism is crucial for plant growth above and below ground. Mutations in LAZY1 disrupt stem gravitropism and result in wider angles of inflorescence branches. The interaction between BRXL4 and LAZY1 at the plasma membrane negatively regulates LAZY1 function, affecting shoot system architecture.
Article
Biochemistry & Molecular Biology
Zhuqian Liu, Yadi Chen, Siqi Liu, Shuqiu Jiang, Lulu Wang, Yonghui Hong, Zixuan Yao, Xiaodie Hu, Ying Li
Summary: The MIZ1 protein is important for root hydrotropism, but its relationship with amyloplast-mediated gravitropism is not well understood. In this study, miz1/pgm1 double mutants were generated to investigate this relationship. The results showed that MIZ1 plays a role in both amyloplast development and gravitropic bending, while maintaining the non-hydrotropic phenotype of the miz1 mutant.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Jiayue Chen, Renbo Yu, Na Li, Zhaoguo Deng, Xinxin Zhang, Yaran Zhao, Chengfu Qu, Yanfang Yuan, Zhexian Pan, Yangyang Zhou, Kunlun Li, Jiajun Wang, Zhiren Chen, Xiaoyi Wang, Xiaolian Wang, Shu-Nan He, Juan Dong, Xing Wang Deng, Haodong Chen
Summary: This study provides a molecular interpretation for the starch-statolith hypothesis by revealing the role of phosphorylation-mediated interaction between LAZY proteins and amyloplasts in gravity sensing. It also demonstrates how this interaction influences root differential growth through asymmetrical auxin distribution.
Review
Plant Sciences
Muhammed K. Jamsheer, Sunita Jindal, Ashverya Laxmi
JOURNAL OF EXPERIMENTAL BOTANY
(2019)
Article
Plant Sciences
Mohan Sharma, Zeeshan Zahoor Banday, Brihaspati N. Shukla, Ashverya Laxmi
Review
Multidisciplinary Sciences
Aditi Gupta, Andres Rico-Medina, Ana I. Cano-Delgado
Review
Biochemistry & Molecular Biology
Harshita B. Saksena, Manvi Sharma, Dhriti Singh, Ashverya Laxmi
JOURNAL OF PLANT BIOCHEMISTRY AND BIOTECHNOLOGY
(2020)
Review
Biochemistry & Molecular Biology
Manvi Sharma, Dhriti Singh, Harshita B. Saksena, Mohan Sharma, Archna Tiwari, Prakhar Awasthi, Halidev Krishna Botta, Brihaspati Narayan Shukla, Ashverya Laxmi
Summary: Root system architecture is a crucial trait regulated by physical factors and hormones, with phytohormones playing a key role in influencing root development through diverse mechanisms. Understanding the complex interactions among hormones is essential for improving crop performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Bhuwaneshwar Sharan Mishra, Mohan Sharma, Ashverya Laxmi
Summary: In the natural environment, plants utilize sugar molecules and phytohormones to coordinate growth and survival, affecting physiological processes from seed germination to senescence. Sugars not only serve as energy resources and structural components but also function as signaling molecules interacting with plant hormones, stress, and other pathways. Phytohormone auxin plays a crucial role in various stages of the plant life cycle and response to dynamic environments for optimal growth and development.
PHYSIOLOGIA PLANTARUM
(2022)
Article
Plant Sciences
Manvi Sharma, Mohan Sharma, Muhammed K. Jamsheer, Ashverya Laxmi
Summary: The role of jasmonates in primary root growth and plant response to external stimuli is known, while its role in lateral root development is still unclear. Our study identified methyl jasmonate as a key phytohormone in determining the branching angle of Arabidopsis lateral roots. We also found that light and glucose have dual roles in regulating lateral root angle, and glucose antagonizes the response of methyl jasmonate. Moreover, we demonstrated the importance of light perception and signaling in inducing vertical angles by methyl jasmonate.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Plant Sciences
Mohan Sharma, Muhammed K. Jamsheer, Brihaspati Narayan Shukla, Manvi Sharma, Prakhar Awasthi, Sanjeet Kumar Mahtha, Gitanjali Yadav, Ashverya Laxmi
Summary: Global warming has profound effects on plant growth and productivity, causing plants to sacrifice growth to activate protective stress responses for survival. The Glucose-TOR signaling pathway plays a crucial role in plant adaptation to heat stress by regulating gene expression and epigenetic modifications, ultimately influencing thermotolerance. The TOR pathway integrates stress and energy signaling to regulate plant responses to environmental stress.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Rekha Agrawal, Mohan Sharma, Nidhi Dwivedi, Sourobh Maji, Pallabi Thakur, Alim Junaid, Jiri Fajkus, Ashverya Laxmi, Jitendra K. Thakur
Summary: This study reveals the role of the Mediator complex as an integrator of jasmonate (JA) and auxin signaling pathways during thermomorphogenesis in Arabidopsis. Warm temperature induces the expression of JA signaling genes and promotes the accumulation of the JA signaling receptor COI1 and degradation of the JA signaling repressor JASMONATE-ZIM-DOMAIN PROTEIN9. The Mediator complex, specifically the mediator subunit MED17, occupies the promoters of thermosensory genes and facilitates enrichment of H3K4me3, which is dependent on the bHLH transcription factor PIF4.
Article
Cell Biology
Muhammed Jamsheer, Sunita Jindal, Mohan Sharma, Prakhar Awasthi, S. Sreejat, Manvi Sharma, Chanchal Thomas Mannully, Ashverya Laxmi
Summary: TOR kinase is a central coordinator of nutrient-dependent growth in eukaryotes, and its negative feedback loop plays a crucial role in the adaptability of plants to different environmental conditions.
Review
Plant Sciences
K. Muhammed Jamsheer, Prakhar Awasthi, Ashverya Laxmi
Summary: This review highlights the role of TORC1 kinase as a central integrator communicating with diverse proteins to coordinate growth according to nutrient availability in plants. The study reveals the central role of TORC1 in regulating growth through interaction with hormones, photoreceptors, and stress signaling machinery in plants. The analysis also suggests the evolutionary innovations and lineage-specific components of plant TORC1 signaling. Additionally, several uncharacterized and unexplored components of the TORC1 signaling network are discussed, indicating potential links for future studies.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Mohan Sharma, Manvi Sharma, Muhammed K. Jamsheer, Ashverya Laxmi
Summary: Plants have established a 'stress memory' to better cope with stress recurrences. Glucose and target of rapamycin (TOR) play important roles in stress adaptation. However, the role of TOR in modulating stress memory response is still unknown. This study found that Glucose regulates the expression of genes involved in thermomemory through TOR. Overexpression of TOR resulted in better stress endurance, while TOR RNAi showed reduced thermomemory. Thermomemory is linked with histone methylation at specific sites of heat stress genes. TOR promotes long-term accumulation of H3K4me3 on thermomemory-associated gene promoters. The study also identified TOR-activating E2Fa as a regulator of ATX1 expression, which ultimately regulates thermomemory formation.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Sunita Jindal, Pavel Kerchev, Miroslav Berka, Martin Cerny, Halidev Krishna Botta, Ashverya Laxmi, Bretislav Brzobohaty
Summary: The study shows that type-A ARRs play an important role in heat stress response in Arabidopsis by affecting the redox homeostasis, thereby improving the efficiency of plant responses to stress stimuli.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Muhammed K. Jamsheer, Dhriti Singh, Mohan Sharma, Manvi Sharma, Sunita Jindal, Chanchal T. Mannully, Brihaspati N. Shukla, Ashverya Laxmi
PLANT SIGNALING & BEHAVIOR
(2019)
Review
Developmental Biology
Ainoa Planas-Riverola, Aditi Gupta, Isabel Betegon-Putze, Nadja Bosch, Marta Ibanes, Ana I. Cano-Delgado