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Gandikota M, Krishnakanth Yadav T, Maram RR, Kalluru S, Sena MB, Siddiq EA, Kalinati Narasimhan Y, Vemireddy LR, Ghanta A. Development of activation-tagged gain-of-functional mutants in indica rice line (BPT 5204) for sheath blight resistance. Mol Biol Rep 2024; 51:381. [PMID: 38430361 DOI: 10.1007/s11033-023-09194-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 12/21/2023] [Indexed: 03/03/2024]
Abstract
BACKGROUND The development of sheath blight (ShB) resistance varieties has been a challenge for scientists for long time in rice. Activation tagging is an efficient gain-of-function mutation approach to create novel phenotypes and to identify their underlying genes. In this study, a mutant population was developed employing activation tagging in the recalcitrant indica rice (Oryza sativa L.) cv. BPT 5204 (Samba Mahsuri) through activation tagging. METHODS AND RESULTS In this study, we have generated more than 1000 activation tagged lines in indica rice, from these mutant population 38 (GFP- RFP+) stable Ds plants were generated through germinal transposition at T2 generation based on molecular analysis and seeds selected on hygromycin (50 mg/L) containing medium segregation analyses confirmed that the transgene inherited as mendelian segregation ratio of 3:1 (3 resistant: 1 susceptible). Of them, five stable activation tagged Ds lines (M-Ds-1, M-Ds-2, M-Ds-3, M-Ds-4 and M-Ds-5) were selected based on phenotypic observation through screening for sheath blight (ShB) resistance caused by fungal pathogen Rhizoctonia solani (R. solani),. Among them, M-Ds-3 and M-Ds-5 lines showed significant resistance for ShB over other tagged lines and wild type (WT) plants. Furthermore, analysed for launch pad insertion through TAIL-PCR results and mapped on corresponding rice chromosomes. Flanking sequence and gene expression analysis revealed that the upregulation of glycoside hydrolase-OsGH or similar to Class III chitinase homologue (LOC_Os08g40680) in M-Ds-3 and a hypothetical protein gene (LOC_Os01g55000) in M-Ds-5 are potential candidate genes for sheath blight resistance in rice. CONCLUSION In the present study, we developed Ac-Ds based ShB resistance gain-of-functional mutants through activation tagging in rice. These activation tagged mutant lines can be excellent sources for the development of ShB resistant cultivars in rice.
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Affiliation(s)
- Mahendranath Gandikota
- Institute of Biotechnology, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Rajendranagar, Hyderabad, 500030, India
- ICAR-Indian Institute of Rice Research, Rajendranagar, Hyderabad, 500030, India
| | - T Krishnakanth Yadav
- Institute of Biotechnology, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Rajendranagar, Hyderabad, 500030, India
| | | | - Sudhamani Kalluru
- Department of Genetics and Plant Breeding, S.V. Agricultural College, Acharya N.G. Ranaga Agricultural University (ANGRAU), Tirupati, 517502, India
| | - M Balachandran Sena
- ICAR-Indian Institute of Rice Research, Rajendranagar, Hyderabad, 500030, India
| | - E A Siddiq
- Institute of Biotechnology, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Rajendranagar, Hyderabad, 500030, India
| | - Yamini Kalinati Narasimhan
- Institute of Biotechnology, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Rajendranagar, Hyderabad, 500030, India
| | - Lakshminarayana R Vemireddy
- Department of Molecular Biology and Biotechnology, S.V. Agricultural College, Acharya N.G. Ranaga Agricultural University (ANGRAU), Tirupati, 517502, India.
| | - Anuradha Ghanta
- Institute of Biotechnology, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Rajendranagar, Hyderabad, 500030, India.
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Wang X, Wang Z, Lu Y, Huang J, Hu Z, Lou J, Fan X, Gu Z, Liu P, Ma B, Chen X. OsACA9, an Autoinhibited Ca 2+-ATPase, Synergically Regulates Disease Resistance and Leaf Senescence in Rice. Int J Mol Sci 2024; 25:1874. [PMID: 38339152 PMCID: PMC10856199 DOI: 10.3390/ijms25031874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 01/27/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024] Open
Abstract
Calcium (Ca2+) is a versatile intracellular second messenger that regulates several signaling pathways involved in growth, development, stress tolerance, and immune response in plants. Autoinhibited Ca2+-ATPases (ACAs) play an important role in the regulation of cellular Ca2+ homeostasis. Here, we systematically analyzed the putative OsACA family members in rice, and according to the phylogenetic tree of OsACAs, OsACA9 was clustered into a separated branch in which its homologous gene in Arabidopsis thaliana was reported to be involved in defense response. When the OsACA9 gene was knocked out by CRISPR/Cas9, significant accumulation of reactive oxygen species (ROS) was detected in the mutant lines. Meanwhile, the OsACA9 knock out lines showed enhanced disease resistance to both rice bacterial blight (BB) and bacterial leaf streak (BLS). In addition, compared to the wild-type (WT), the mutant lines displayed an early leaf senescence phenotype, and the agronomy traits of their plant height, panicle length, and grain yield were significantly decreased. Transcriptome analysis by RNA-Seq showed that the differentially expressed genes (DEGs) between WT and the Osaca9 mutant were mainly enriched in basal immune pathways and antibacterial metabolite synthesis pathways. Among them, multiple genes related to rice disease resistance, receptor-like cytoplasmic kinases (RLCKs) and cell wall-associated kinases (WAKs) genes were upregulated. Our results suggest that the Ca2+-ATPase OsACA9 may trigger oxidative burst in response to various pathogens and synergically regulate disease resistance and leaf senescence in rice.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Xifeng Chen
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (X.W.); (Y.L.); (Z.H.); (J.L.); (Z.G.); (P.L.)
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