231 results match your criteria: "Indian Institute of Rice Research[Affiliation]"

Biofortification of staple food crops with zinc (Zn) is considered a sustainable strategy to prevent deficiency, but evidence on their health impact is awaited. The weaning Wistar/Kyoto male rats were fed on a Zn-deficient diet (ZDD, < 0.1 ppm) for 4 weeks followed by repletion (pair feeding) with control rice diet without (CRD; 5.

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Biological nitrogen fixation (BNF) occurring in the rhizosphere is a sustainable source of nitrogen for plants. BNF in cereal crops can be promoted by inoculation of a single or consortium of associative and endophytic diazotrophs. Creating a successful nitrogen-fixing biofertilizer necessitates the study of the core microbiome of the plant rhizosphere and the functional relationship of the members.

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  • - Rice struggles in acidic soils due to nutrient deficiencies and metal toxicities, prompting a study to identify genotypes that perform well in low phosphorus conditions.
  • - Researchers evaluated 234 rice genotypes over two seasons and found 46 low-phosphorus tolerant lines, with specific accessions showing better yields than standard checks.
  • - A genome-wide association study uncovered 10 quantitative trait nucleotides related to yield and phosphorus utilization efficiency, along with 34 candidate genes that could guide future rice breeding efforts.
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Plants can transmit information to the next generation and modulate the phenotype of their offspring through epigenetic mechanisms. In this study, we demonstrate the activation of "intergenerational acquired resistance" (IAR) in the progeny of rice (Oryza sativa) plants exogenously treated with dehydroascorbate (DHA). The offspring of lifelong DHA-treated plants (DHA-IAR) were significantly less susceptible to the root-knot nematode Meloidogyne graminicola and partially inherited the DHA-induced transcriptional response found in the parental plants.

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Deciphering the role of growth regulators in enhancing plant immunity against herbivory.

Physiol Plant

October 2024

Molecular Biology Research Lab, Department of Zoology, Deshbandhu College, University of Delhi, Kalkaji, New Delhi, India.

Plants are central to global food production, and the pursuit of sustainability aims to enhance or preserve food quality while safeguarding the environment. Due to their immobility, plants are unable to evade unfavourable climatic setups or interactions with other living creatures. Upon their interaction with insect herbivores, plants face biotic stress, which is a constant challenge for plants, causing molecular, physiological, and biochemical changes and reducing their productivity.

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Plant defence mechanisms, including physical barriers like toughened bark and chemical defences like allelochemicals, are essential for protecting them against pests. Trees allocate non-structural carbohydrates (NSCs) to produce secondary metabolites like monoterpenes, which increase during biotic stress to fend off pests like the Eurasian spruce bark beetle, ESBB (). Despite these defences, the ESBB infests Norway spruce, causing significant ecological damage by exploiting weakened trees and using pheromones for aggregation.

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Plant pathogens are causing substantial economic losses and thus became a significant threat to global agriculture. Effective and timely detection methods are prerequisite for combating the damages caused by the plant pathogens. In the realm of plant pathogen detection, the isothermal amplification techniques, e.

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Diverse uses of maize oil attracted various stakeholders, including food, feed, and bioenergy, highlighting the increased demand for sustainable production. Here, 48 diverse sub-tropical maize genotypes varying for dgat1-2 and fatb genes governing oil attributes, were evaluated in three diverse locations to assess trends of oil content, fatty acid (FA) profile, the effect of environment on oil attributes, the impact of different gene combinations and determine FA health and nutritional properties. The genotypes revealed wide variation in oil content (OC: 3.

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Phytic acid or inositol hexakisphosphate (InsP) and its dephosphorylated forms (InsP, InsP & InsP) are integral to cellular functions and confer several health benefits. The present study was aimed to develop a cost effective and high sample throughput RP-HPLC-RID method for routine quantification of lower inositol phosphates in both raw and processed cereals and pulses. For this asuitable mobile phase composition was formulated and two columns (MacroporusHamilton PRP-1 Vs Waters Symmetry C18) were compared in terms ofsystem specificity,linearity, accuracy and precision.

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  • Grain weight (GW) significantly impacts cereal crop yield, and a study analyzed 105 backcross introgression lines (BILs) and 90 chromosome segment substitution lines (CSSLs) over four wet seasons to evaluate thousand-grain weight (TGW).
  • The study identified various NPS and NPK lines with either positive or negative impacts on TGW, and through QTL mapping, 13 QTLs were detected in NPS with notable effects on grain weight, while 10 were found in NPK.
  • Notably, a specific grain weight QTL was fine-mapped to a 31 kb region, which includes the GRAS transcription factor gene, suggesting its potential role in enhancing grain weight in the
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  • The study aimed to enhance the nutritional quality of maize by increasing kernel oil content and improving the bioavailability of fat-soluble vitamins using advanced genetic techniques like marker-assisted selection (MAS).
  • Maize hybrids developed in the study showed a significant increase in oil content (from 4.80% to 6.73%) and beneficial fatty acid profiles, including higher oleic acid and lower palmitic acid, while also retaining higher levels of provitamin A, vitamin E, and essential amino acids.
  • These improved hybrids maintained comparable yields and growth characteristics to original maize varieties, making them a promising solution to combat malnutrition and meet the growing demand for healthy oils sustainably.
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Rice (L.) is a crucial staple food crop globally, facing significant challenges from various pests that affect crop productivity and quality. Conventional pesticide usage has limitations, necessitating the development of sustainable pest management strategies.

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Utilizing agricultural and industrial wastes, potent reservoirs of nutrients, for nourishing the soil and crops through composting embodies a sustainable approach to waste management and organic agriculture. To investigate this, a 2-year field experiment was conducted at ICAR-IARI, New Delhi, focusing on a pigeon pea-vegetable mustard-okra cropping system. Seven nutrient sources were tested, including a control (T), 100% recommended dose of nitrogen (RDN) through farmyard manure (T), 100% RDN through improved rice residue compost (T), 100% RDN through a paddy husk ash (PHA)-based formulation (T), 75% RDN through PHA-based formulation (T), 100% RDN through a potato peel compost (PPC)-based formulation (T), and 75% RDN through PPC-based formulation (T).

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  • The study focuses on improving the root system architecture (RSA) in rice varieties to better adapt to climate change and nutrient deficiencies.
  • Researchers developed a F mapping population using a high root length and volume mutant (TI-128) and identified specific genomic regions on chromosomes 12 and 2 associated with these traits.
  • Validation of certain genes showed higher expression in the mutant compared to the wild type, suggesting these genes may enhance root length and volume in rice.
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Plants and insects coevolved as an evolutionarily successful and enduring association. The molecular arms race led to evolutionary novelties regarding unique mechanisms of defence and detoxification in plants and insects. While insects adopt mechanisms to conquer host defence, trees develop well-orchestrated and species-specific defence strategies against insect herbivory.

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Complete panicle exsertion (CPE) is an economically important quantitative trait that contributes to grain yield in rice. We deployed an integrated approach for understanding the molecular mechanism of CPE using a stable ethyl methanesulfonate mutant line, CPE-109 of the Samba Mahsuri (SM) variety of rice (Oryza sativa), which exhibits CPE. Two consistent genomic regions were identified for CPE through quantitative trait locus (QTL) mapping [qCPE-4 (28.

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  • * The structure and composition of rice stems play a crucial role in resisting lodging, with various environmental factors affecting their strength.
  • * Advances in sequencing technology enhance the understanding of lodging resistance by identifying key genes and leveraging modern breeding strategies for improving rice plant strength.
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The main biochemical traits were estimated in poplar leaves under biotic attack (aphids and spongy moth infestation). Changes in the abundance of bioactive compounds in genetically uniform individuals of European aspen (), such as proline, polyphenolic compounds, chlorophylls and , and volatile compounds, were determined between leaves damaged by sucking insects (aphid-) and chewing insects (spongy moth-) compared to uninfected leaves. Among the nine analyzed phenolic compounds, only catechin and procyanidin showed significant differences between the control leaves and leaves affected by spongy moths or aphids.

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By deploying a multi-omics approach, we unraveled the mechanisms that might help rice to combat Yellow Stem Borer infestation, thus providing insights and scope for developing YSB resistant rice varieties. Yellow Stem Borer (YSB), Scirpophaga incertulas (Walker) (Lepidoptera: Crambidae), is a major pest of rice, that can lead to 20-60% loss in rice production. Effective management of YSB infestation is challenged by the non-availability of adequate sources of resistance and poor understanding of resistance mechanisms, thus necessitating studies for generating resources to breed YSB resistant rice and to understand rice-YSB interaction.

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  • Rice blast and bacterial leaf blight (BLB) significantly impact rice yields globally, causing losses of 20-50%, especially in regions like India with severe infections.* -
  • The study involves the improved rice line TH-625-491, which carries multiple resistance genes against BLB and blast; these were validated and backcrossed to enhance resistance traits.* -
  • Findings suggest a potential antagonistic effect between genes for bacterial blight and blast resistance, as certain gene combinations exhibited better resistance to blast alone compared to those including both types of resistance.*
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The total phenolic content, phenolic acid profile, anthocyanins, proanthocyanidins, flavonoids, and antioxidant capacity of the whole-grain and bran portion of sixteen distinct rice genotypes that correspond to three distinct pericarp bran colors-black, red, and non-pigmented (NP)-were examined. Ten free and bound phenolic acids, as well as two flavonoids, were analyzed using HPLC-PDA. The flavonoids included kaempferol and catechin hydrate, and the free phenolic acids included gallic acid, 2,5-dihydroxybenzoic acid, vanillic acid, syringic acid, p-coumaric acid, chlorogenic acid, trans-cinnamic acid, trans-ferulic acid, p-coumaric acid, and sinapic acid.

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  • - Sheath blight disease in rice, caused by the fungus Rhizoctonia solani AG1-IA, leads to significant losses in yield and quality, making the discovery of resistance genes crucial for effective management.
  • - A study utilizing RNA sequencing on six diverse rice genotypes identified 352 differentially expressed genes related to sheath blight resistance, with a focus on one gene, Oschib1, linked to resistance variations.
  • - The Oschib1 gene, which encodes a classIII chitinase, was cloned from a resistant rice type and over-expressed in a susceptible variety, resulting in increased resistance to the fungus, demonstrating a dose-dependent effect on the plant's defense response.
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The implementation of integrated potassium management presents a viable approach for augmenting plant growth, yield, and nutrient uptake while enhancing soil nutrient availability. A field experiment was executed during the rabi season of 2020, employing a randomized complete block design encompassing eight treatments involving standard (100%) and reduced (75% and 50%) rates of the recommended dose of potassium (RDK) administered through muriate of potash (MOP). Treatments included variations in the incorporation/exclusion of plant growth-promoting rhizobacteria (PGPR), farmyard manure (FYM) at 25% of potassium recommendation, and foliar application of nano potash.

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