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KEY MESSAGEThis study provides insights into the molecular and hormonal control of cleistogamy in pigeonpea, focusing on bHLH transcription factors and jasmonic acid pathway. Pigeonpea, an annual diploid (2n = 22) grain legume, holds significant nutritional value in cereal-dominated diets. The chasmogamous flowers of pigeonpea have a typical 9 + 1 diadelphous stamen where flowers open pre-fertilization resulting in cross-pollination. In contrast, a cleistogamous genotype characterized by polyadelphous stamens and flowers that open post-fertilization ensuring seed purity was analyzed for identifying causal pathways. Subsequent analysis focused on a set of transcription factors and their interaction with the hormonal networks associated with cleistogamy. Genes of the Jasmonic acid (JA) signaling pathway have been established to play a significant role in inducing cleistogamy and one of the key regulators of the JA pathway is bHLH (basic helix loop helix). A genome-wide survey identified 176 bHLH genes in the pigeonpea genome. Phylogenetic analysis classified 176 bHLH genes into 21 subfamilies distributed randomly across the genome. Gene ontology, cis-motifs analysis in the upstream region, and protein-protein interaction network implied the involvement of these genes in various biological processes. Expression analysis of key genes of the jasmonic acid pathway which includes MYC2 (Cc_bHLH135) along with its interacting partners TIFY/JAZ in chasmogamous and cleistogamous floral tissues revealed their potential role in flower opening. The results of UHPLC-MS/MS quantitation of Jasmonic acid and its bioactive form JA-Ile align with the expression analysis. The congruence of gene expression and hormone profiling highlights the involvement of the JA pathway in regulating flower opening, implying their potential role in cleistogamy in pigeonpea.

01 May 2025·Plant Science

UFMylation: Exploring a lesser known post translational modification

Review

Author: Sharma, Rohit ; Mujib, Abdul ; Prasad, Ashish ; Chirom, Oceania ; Prasad, Manoj

Ubiquitination is a highly conserved post-translational modification (PTM) in which ubiquitin (Ub) is covalently attached to substrate proteins resulting in the alteration of protein structure, function, and stability. Another class of PTM mediated by ubiquitin-like proteins (UBLs) has gained significant attention among researchers in recent years. This article focuses on one such UBL-mediated PTM i.e. UFMylation. The enzymatic mechanism of UFMylation is similar to ubiquitination, involving three steps regulated by three different enzymes. In plants, reports suggest that UFMylation is predominantly involved in maintaining ER homeostasis including ER-phagy. However, studies related to this PTM are limited and future studies might reveal other molecular pathways regulated by UFMylation.

01 Apr 2025·Pediatrics & Neonatology

Critical appraisal on neural tube defects and their complexities

Review

Author: Kaleem, Safa ; Verma, Tiya ; Sanadhya, Mallica ; Shaikh, Fouziya ; Ahmad, Faizan ; Jayaraj, Richard L

Neural tube defects (NTDs), as a group of diseases, are congenital disabilities due to incomplete closure of the neural tube along its length, which otherwise forms the fully developed brain and spinal cord. An amalgamation of genetic, nutritional, and environmental factors plays a role in causing NTDs. They develop relatively early, within the first month of pregnancy-the time of neurulation, which could indicate that the pathogenesis of these diseases could stem from even pre-pregnancy causes like folic acid deficiency. This article provides an overview of the various etiology of NTDs and how they interact, as well as various preventive and curative measures like folic acid and inositol supplementation, stem cell transplant, and postnatal surgery. Identifying potential risk factors can help clinicians develop better management techniques beyond the limited scope of the presently used prophylactic and treatment methods.

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