Publications of NIPGR Scientists

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Author: search.filters.author.Awasthi, PrakharSubject: search.filters.subject.Auxin

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    Sweet shaping of root system architecture under water deficit
    (Oxford University Press, 2026) Singh, Dhriti; Awasthi, Prakhar; Sharma, Aishwarye; Samtani, Harsha; Shukla, Brihaspati Narayana; Laxmi, Ashverya
    Root growth direction under water-deficit conditions is critical for plant survival. Increasing agar concentration in the growth medium simulates stress conditions, limiting water availability. Our study highlights the role of glucose (Glc) in orchestrating the root growth deviation in Arabidopsis under stress conditions. We demonstrate that Glc-TOR signaling plays a central role in modulating root growth direction under stress conditions. Conversely, cytokinin (CK) signaling reduces root deviation during water deficit. We further show that Glc downregulates CK signaling under water-deficit conditions, while CK negatively influences Glc–TOR activity. The interplay between Glc-TOR and CK signaling pathways fine-tunes root orientation by modulating auxin transport and signaling. Collectively, our findings show that in Arabidopsis, Glc-induced changes in root architecture are mediated through its antagonistic interaction with CK signaling, contributing to enhanced root plasticity and improved adaptation to water-limited conditions.
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    The confluence of TOR signaling and plant growth regulators in development and stress responses
    (Oxford University Press, 2026) Saksena, Harshita B; Kumar, Mukesh; Samtani, Harsha; Sharma, Aishwarye; Rawat, Sanjay Singh; Awasthi, Prakhar; Botta, Halidev Krishna; Sandhya, Shital; Pande, Anjali; Naaz, Sheeba; Kushwah, Sunita; Shukla, Brihaspati N; Laxmi, Ashverya
    The Target of Rapamycin (TOR) is an evolutionarily conserved protein kinase that serves as a crucial signaling hub, seamlessly integrating a wide range of internal and external signals to meticulously regulate cellular and organismal physiology. TOR is crucial in regulating the different phases of lifecycle in plants including embryogenesis, seed germination, meristem activation, root and leaf development, flowering and senescence. Beyond its central role in growth and development, emerging research has revealed its significant involvement in the response to environmental stresses. Even though plant growth regulators such as auxin, cytokinin (CK), brassinosteroid (BR), gibberellin (GA), abscisic acid (ABA), ethylene (ET), salicylic acid (SA), jasmonic acid (JA) and nitric oxide (NO) function as pivotal signaling molecules in modulating plant development and stress responses, how they coordinate with the energy status still remains obscure. Here we summarize the current findings on the dynamic interconnection between TOR and these discrete phytoregulators and their potential role in executing diverse biological processes in plants.