Publications by authors named "Arumugam Chandrasekar"
Article Synopsis
- - The study focuses on pathogen-related proteins (PR) that are essential in defending banana plants against various stresses, placing particular emphasis on the PR-1 gene family, which plays a critical role in resistance to threats like Fusarium oxysporum.
- - Researchers cloned and analyzed three specific PR-1 genes from both resistant and susceptible banana cultivars, finding them significantly up-regulated when exposed to pathogens and establishing various characteristics between the gene groups.
- - The results highlight the role of PR-1 genes in signaling pathways related to plant defense, along with insights from docking studies that suggest potential interactions which may impact the antifungal effectiveness of these proteins.
Article Synopsis
- Bananas are a key food source and cash crop but are threatened by pests and diseases that can significantly lower their quality and yield.
- Effective disease management requires integrated strategies, including the development of resistant banana cultivars through genetic modifications that either enhance resistance or inactivate susceptibility factors that allow infections to spread.
- Recent research identified numerous potential 2-oxoglutarate Fe(II) dependent oxygenases (2OGDs) in banana genomes, showing that certain genes are linked to disease resistance, paving the way for future genetic editing to improve banana crop durability against pathogens like Foc and TR4.
Article Synopsis
- Banana breeding programs aim to enhance disease resistance by identifying resistance (R) genes, specifically focusing on the nucleotide-binding site (NBS) gene family, which has been largely overlooked.
- The study identified and classified 116 NBS genes from M. acuminata and 43 from M. balbisiana, revealing insights into their structural characteristics and evolutionary history.
- Findings included significant expression differences in NBS genes between resistant and susceptible banana cultivars facing various diseases, along with the discovery of microRNAs that regulate these genes, thereby providing valuable resources for future breeding efforts.
Banana is one of the major food crops and its production is subject to many pests and diseases. Banana breeding exploits wild relatives and progenitor species for the introgression of resistant genes (R) into cultivated varieties to overcome these hurdles. With advances in sequencing technologies, whole-genome sequences are available for many spp.
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- The study explores the expansin gene family, which plays a crucial role in the growth and stress response of crops, focusing on the banana plant, a vital food source in developing countries.
- Researchers identified 58 and 55 expansin genes in the A and B genomes of cultivated bananas and found distinct gene expressions under different stress conditions.
- Results suggest that specific expansin subfamilies contribute significantly to stress resistance, particularly in drought and nematode challenges, indicating potential targets for improving banana resilience.
Development of fusarium wilt resistant mutants of Musa spp. cv.Rasthali (AAB, Silk subgroup) and comparative proteomic analysis along with its wild type.
Planta
March 2022
Induced mutagenesis using embryogenic cell suspension (ECS) explants with toxin based screening is an effective tool to create non-chimeral Fusarium wilt resistant mutants in banana. Global proteomics unravel the molecular mechanism behind resistance. Race 1 of Fusarium wilt is a serious threat to Musa spp.
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- The study focuses on Pathogenesis related protein-1 (PR-1), which is crucial for banana's defense against various stresses, revealing limited understanding of its gene family and evolutionary connections.
- Researchers identified 15 and 11 PR-1 genes from the A and B genomes of bananas, noting their diverse structures, conserved motifs, and uneven distribution across 11 chromosomes, indicating duplication's role in gene family expansion.
- qRT-PCR analysis showed a positive correlation between PR-1 gene expression and RNA sequencing data under stress, highlighting their significance in managing diseases like fusarium wilt and their potential for developing stress-tolerant banana varieties.
Availability of transcriptome datasets for use in accelerated molecular-based breeding in species is limited. Illumina Hiseq technology was employed to determine differential gene expression between the contrasting cultivars for three different stresses ( leaf spot -, root lesion nematode - and moisture deficit stress) under challenged and unchallenged conditions. An average of 34.
View Article and Find Full Text PDFIn banana, drought responsive gene expression profiles of drought-tolerant and sensitive genotypes remain largely unexplored. In this research, the transcriptome of drought-tolerant banana cultivar (Saba, ABB genome) and sensitive cultivar (Grand Naine, AAA genome) was monitored using mRNA-Seq under control and drought stress condition. A total of 162.
View Article and Find Full Text PDFUnlabelled: Ginger (Zingiber officinale Rosc) (Family: Zingiberaceae) is a herbaceous perennial, the rhizomes of which are used as a spice. Ginger is a plant which is well known for its medicinal applications. Recently EST-derived SNPs are a free by-product of the currently expanding EST (Expressed Sequence Tag) databases.
View Article and Find Full Text PDFUnlabelled: Coconut crop improvement requires a number of biotechnology and bioinformatics tools. A database containing information on CG (coconut germplasm), CCI (coconut cultivar identification), CD (coconut disease), MIFSPC (microbial information systems in plantation crops) and VO (vegetable oils) is described. The database was developed using MySQL and PostgreSQL running in Linux operating system.
View Article and Find Full Text PDFThe oil palm is a tropical oil bearing tree. Recently EST-derived SNPs and SSRs are a free by-product of the currently expanding EST (Expressed Sequence Tag) data bases. The development of high-throughput methods for the detection of SNPs (Single Nucleotide Polymorphism) and small indels (insertion / deletion) has led to a revolution in their use as molecular markers.
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