Ragavendran Abbai

Leibniz Institute of Plant Genetics and Crop Plant Research

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Vikas Kumar Singh

International Crops Research Institute for the Semi-Arid Tropics

Arvind Kumar

International Rice Research Institute

Uma Maheshwar Singh

International Rice Research Institute

Deok Chun Yang

Kyung Hee University

Ramya Mathiyalagan

Kyung Hee University

Shilpi Dixit

International Crops Research Institute for the Semi-Arid Tropics

Thorsten Schnurbusch

Leibniz Institute of Plant Genetics and Crop Plant Research

Yeon-Ju Kim

Kyung Hee University

Challa Venkateshwarlu

International Crops Research Institute for the Semi-Arid Tropics

Shailesh Yadav

International Rice Research Institute

Cooperative Institutions

Kyung Hee University

International Crops Research Institute for the Semi-Arid Tropics

Tamil Nadu Agricultural University

Indian Institute of Rice Research

Indian Council of Agricultural Research

International Rice Research Institute

International Crops Research Institute for the Semi-Arid Tropics

Government of the Republic of Korea

Korean Society of Ginseng

Yong In University

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Functional Genomic Approaches in Plant Research

Springer eBooks (2017)

Ragavendran Abbai Sathiyamoorthy Subramaniyam Ramya Mathiyalagan Deok Chun Yang

10.1007/978-3-319-67156-7_8

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Citations (7)

Pleuropterus multiflorus (Hasuo) mediated straightforward eco-friendly synthesis of silver, gold nanoparticles and evaluation of their anti-cancer activity on A549 lung cancer cell line

Biomedicine & Pharmacotherapy (2017)

Verónica Castro-Aceituno Ragavendran Abbai Seong Soo Moon Sungeun Ahn Ramya Mathiyalagan

Silver nanoparticle

10.1016/j.biopha.2017.07.040

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Citations (50)

Grain yield trade-offs in spike-branching wheat can be mitigated by elite alleles affecting sink capacity and post-anthesis source activity

Journal of Experimental Botany (2023)

Ragavendran Abbai Guy Golan C. Friedrich H. Longin Thorsten Schnurbusch

Abstract Introducing variations in inflorescence architecture, such as the ‘Miracle-Wheat’ (Triticum turgidum convar. compositum (L.f.) Filat.) with a branching spike, has relevance for enhancing wheat grain yield. However, in the spike-branching genotypes, the increase in spikelet number is generally not translated into grain yield advantage because of reduced grains per spikelet and grain weight. Here, we investigated if such trade-offs might be a function of source–sink strength by using 385 recombinant inbred lines developed by intercrossing the spike-branching landrace TRI 984 and CIRNO C2008, an elite durum (T. durum L.) cultivar; they were genotyped using the 25K array. Various plant and spike architectural traits, including flag leaf, peduncle, and spike senescence rate, were phenotyped under field conditions for 2 consecutive years. On chromosome 5AL, we found a new modifier QTL for spike branching, branched headt3 (bht-A3), which was epistatic to the previously known bht-A1 locus. Besides, bht-A3 was associated with more grains per spikelet and a delay in flag leaf senescence rate. Importantly, favourable alleles, viz. bht-A3 and grain protein content (gpc-B1) that delayed senescence, are required to improve grain number and grain weight in the spike-branching genotypes. In summary, achieving a balanced source–sink relationship might minimize grain yield trade-offs in Miracle-Wheat.

Anthesis

Sink (geography)

Peduncle (anatomy)

10.1093/jxb/erad373

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Citations (2)

Caspase-3/MAPK pathways as main regulators of the apoptotic effect of the phyto-mediated synthesized silver nanoparticle from dried stem of Eleutherococcus senticosus in human cancer cells

Biomedicine & Pharmacotherapy (2018)

Chun‐Gon Kim Verónica Castro-Aceituno Ragavendran Abbai Hyun A. Lee Shakina Yesmin Simu

Viability assay

10.1016/j.biopha.2018.01.050

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Citations (62)

Marker Assisted Forward Breeding to Combine Multiple Biotic-Abiotic Stress Resistance/Tolerance in Rice

Rice (2020)

Shilpi Dixit Uma Maheshwar Singh Arun Kumar Singh Shamshad Alam Challa Venkateshwarlu

Unfavorable climatic changes have led to an increased threat of several biotic and abiotic stresses over the past few years. Looking at the massive damage caused by these stresses, we undertook a study to develop high yielding climate-resilient rice, using genes conferring resistance against blast (Pi9), bacterial leaf blight (BLB) (Xa4, xa5, xa13, Xa21), brown planthopper (BPH) (Bph3, Bph17), gall midge (GM) (Gm4, Gm8) and QTLs for drought tolerance (qDTY1.1 and qDTY3.1) through marker-assisted forward breeding (MAFB) approach.Seven introgression lines (ILs) possessing a combination of seven to ten genes/QTLs for different biotic and abiotic stresses have been developed using marker-assisted selection (MAS) breeding method in the background of Swarna with drought QTLs. These ILs were superior to the respective recurrent parent in agronomic performance and also possess preferred grain quality with intermediate to high amylose content (AC) (23-26%). Out of these, three ILs viz., IL1 (Pi9+ Xa4+ xa5+ Xa21+ Bph17+ Gm8+ qDTY1.1+ qDTY3.1), IL6 (Pi9+ Xa4+ xa5+ Xa21+ Bph3+ Bph17+ Gm4+ Gm8+ qDTY1.1+ qDTY3.1) and IL7 (Pi9+ Xa4+ xa5+ Bph3+ Gm4+ qDTY1.1+ qDTY3.1) had shown resistance\tolerance for multiple biotic and abiotic stresses both in the field and glasshouse conditions. Overall, the ILs were high yielding under various stresses and importantly they also performed well in non-stress conditions without any yield penalty.The current study clearly illustrated the success of MAS in combining tolerance to multiple biotic and abiotic stresses while maintaining higher yield potential and preferred grain quality. Developed ILs with seven to ten genes in the current study showed superiority to recurrent parent Swarna+drought for multiple-biotic stresses (blast, BLB, BPH and GM) together with yield advantages of 1.0 t ha- 1 under drought condition, without adverse effect on grain quality traits under non-stress.

Biotic stress

10.1186/s12284-020-00391-7

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Citations (73)

Pathogenesis strategies and regulation of ginsenosides by two species of Ilyonectria in Panax ginseng: power of speciation

Journal of Ginseng Research (2019)

Mohamed El-Agamy Farh Yu‐Jin Kim Ragavendran Abbai Priyanka Singh Ki‐Hong Jung

The valuable medicinal plant Panax ginseng has high pharmaceutical efficacy because it produces ginsenosides. However, its yields decline because of a root-rot disease caused by Ilyonectria mors-panacis. Because species within Ilyonectria showed variable aggressiveness by altering ginsenoside concentrations in inoculated plants, we investigated how such infections might regulate the biosynthesis of ginsenosides and their related signaling molecules.Two-year-old ginseng seedlings were treated with I. mors-panacis and I. robusta. Roots from infected and pathogen-free plants were harvested at 4 and 16 days after inoculation. We then examined levels or/and expression of genes of ginsenosides, salicylic acid (SA), jasmonic acid (JA), and reactive oxygen species (ROS). We also checked the susceptibility of those pathogens to ROS.Ginsenoside biosynthesis was significantly suppressed and increased in response to infection by I. mors-panacis and I. robusta, respectively. Regulation of JA was significantly higher in I. robusta-infected roots, while levels of SA and ROS were significantly higher in I. mors-panacis-infected roots. Catalase activity was significantly higher in I. robusta-infected roots followed in order by mock roots and those infected by I. mors-panacis. Moreover, I. mors-panacis was resistant to ROS compared with I. robusta.Infection by the weakly aggressive I. robusta led to the upregulation of ginsenoside production and biosynthesis, probably because only a low level of ROS was induced. In contrast, the more aggressive I. mors-panacis suppressed ginsenoside biosynthesis, probably because of higher ROS levels and subsequent induction of programmed cell death pathways. Furthermore, I. mors-panacis may have increased its virulence by resisting the cytotoxicity of ROS.

Jasmonic acid

Araliaceae

10.1016/j.jgr.2019.02.001

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Citations (28)

Silicon confers protective effect against ginseng root rot by regulating sugar efflux into apoplast

Scientific Reports (2019)

Ragavendran Abbai Yu‐Jin Kim Padmanaban Mohanan Mohamed El-Agamy Farh Ramya Mathiyalagan

Root rot caused by Ilyonectria mors-panacis is a devastating fungal disease leading to defect in root quality and causes reduced yield during the perennial life cycle of Panax ginseng Meyer. This indicates the imperative need to understand the molecular basis of disease development and also to enhance tolerance against the fungus. With this idea, the protective effect of silicon (supplied as silica nanoparticles) in P. ginseng root rot pathosystem and its molecular mechanism was investigated in the current study. We have tested different concentrations of silicon (Si) to disease-infected ginseng and found that long term analysis (30 dpi) displayed a striking 50% reduction in disease severity index upon the treatment of Si. Expectedly, Si had no direct degradative effect against the pathogen. Instead, in infected roots it resulted in reduced expression of PgSWEET leading to regulated sugar efflux into apoplast and enhanced tolerance against I. mors-panacis. In addition, under diseased condition, both protopanaxadiol (PPD) and protopanaxatriol (PPT) type ginsenoside profile in roots were higher in Si treated plants. This is the first report indicating the protective role of Si in ginseng-root rot pathosystem, thereby uncovering novel features of ginseng mineral physiology and at the same time, enabling its usage to overcome root rot.

Pathosystem

Root rot

Protopanaxadiol

Taproot

Efflux

Araliaceae

10.1038/s41598-019-54678-x

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Citations (18)

<strong>Balanced Parts for the Ideal Whole </strong>

Ragavendran Abbai Vikas Kumar Singh Rod J. Snowdon Arvind Kumar Thorsten Schnurbusch

Crop domestication and breeding considerably increased productivity over centuries, but simultaneously involved unconscious selection against ‘selfish plant behavior’. Paradoxically, modern-day crop breeding largely enhances individual plant-fitness. As agriculture relies on community performance, embracing an “Agroecological Genetics and Genomics” viewpoint might maximize communal yield by matching crop genotypes to target environments.

Agroecology

Crop Productivity

10.20944/preprints202006.0306.v1

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Citations (1)

Balancing grain yield trade-offs in ‘Miracle-Wheat’

bioRxiv (Cold Spring Harbor Laboratory) (2023)

Ragavendran Abbai Guy Golan C. Friedrich H. Longin Thorsten Schnurbusch

ABSTRACT Introducing variations in inflorescence architecture, such as the ‘Miracle-Wheat’ ( Triticum turgidum convar. compositum (L.f.) Filat.) with a branching spike, has relevance for enhancing wheat grain yield. However, in the spike-branching genotypes, the increase in spikelet number is generally not translated into grain yield advantage because of reduced grains per spikelet and grain weight. Here, we investigated if such trade-offs might be a function of source-sink strength by using 385 RILs developed by intercrossing the spike-branching landrace TRI 984 and CIRNO C2008, an elite durum ( T. durum L.) cultivar; they were genotyped using the 25K array. Various plant and spike architectural traits, including flag leaf, peduncle and spike senescence rate, were phenotyped under field conditions for two consecutive years. On Chr 5AL, we found a new modifier QTL for spike-branching, branched head t 3 ( bh t -A3 ), which was epistatic to the previously known bh t -A1 locus. Besides, bh t -A3 was associated with more grains per spikelet and a delay in flag leaf senescence rate. Importantly, favourable alleles viz., bh t -A3 and grain protein content ( gpc-B1 ) that delayed senescence are required to improve grain number and grain weight in the spike-branching RILs. In summary, achieving a balanced source-sink relationship might minimise grain yield trade-offs in Miracle-Wheat. HIGHLIGHT Genetic interplay between sink number and post-anthesis source activity limits grain yield in the spike-branching ‘Miracle-Wheat’.

Anthesis

Sink (geography)

Glume

Peduncle (anatomy)

10.1101/2023.02.23.529729

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Citations (0)

Green synthesis of multifunctional Sg-silver and Sg-gold Nanoparticles: An approach towards generating value added resource of Siberian ginseng

한국자원식물학회 학술심포지엄 (2016)

Ragavendran Abbai Ramya Mathiyalagan Josua Markus Yeon-Ju Kim Verónica Castro-Aceituno

Silver nanoparticle

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