Relevant bibliographies by topics / Lolium rigidum Molecular aspects

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Academic literature on the topic 'Lolium rigidum Molecular aspects'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Lolium rigidum Molecular aspects"

1

Steadman, Kathryn J., Amanda J. Ellery, Ross Chapman, Andrew Moore, and Neil C. Turner. "Maturation temperature and rainfall influence seed dormancy characteristics of annual ryegrass (Lolium rigidum)." Australian Journal of Agricultural Research 55, no. 10 (2004): 1047. http://dx.doi.org/10.1071/ar04083.

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The role of temperature and rainfall during seed development in modulating subsequent seed dormancy status was studied for Lolium rigidum Gaud. (annual ryegrass). Climatic parameters relating to geographic origin were compared with annual ryegrass seed dormancy characteristics for seeds collected from 12 sites across the southern Western Australian cropping region. Seed germination was tested soon after collection and periodically during subsequent after-ripening. Temperature in the year of seed development and long-term rainfall patterns showed correlations with aspects of seed dormancy, particularly the proportion of seeds remaining dormant following 5 months of after-ripening. Consequently, for one population the temperature (warm/cool) and water supply (adequate/reduced) during seed development were manipulated to investigate the role of maternal environment in the quantity and dormancy characteristics of seeds produced. Seeds from plants grown at warm temperatures were fewer in number, weighed less, and were less dormant than those from plants grown at cool temperature. Seeds that developed under both cool temperature and reduced moisture conditions lost dormancy faster than seeds from well-watered plants. Seed maturation environment, particularly temperature, can have a significant effect on annual ryegrass seed numbers and seed dormancy characteristics.
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2

Khalid S. Alshallash, Khalid S. Alshallash. "Effect of Water Salinity on Seeds Germination of Sterile Oat (Avena sterilis) and Rigid Rye Grass (Lolium rigidum) at Constant or Alternating Temperatures." journal of King Abdulaziz University - Meteorology, Environment and Arid Land Agriculture Sciences 26, no. 2 (August 3, 2015): 51–58. http://dx.doi.org/10.4197/met.26-2.6.

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Sterile oat (Avena sterilis) and rigid rye grass (Lolium rigidum) are well known grasses in many parts of the world. They grow in grasslands and arable lands. Both are recorded as serious weeds of arable lands in many countries worldwide. Seeds germination of both species were tested at four levels of water salinity concentrations (0, 100, 300, 500 mM/L of NaCl) and five different temperatures (Constant at 8 C ° or alternating temperatures of; 8/16, 10/18, 6/14, 10/20 C?). Photoperiods regime of 8 hours darkness and 16 hours of light at the constant temperature was implemented. The same was followed with the alternating temperatures with 8 hours darkness at the lower temperature and 16 hours light with the higher temperature. A. sterilis seeds showed better germination with high significance of (? 00.1) than L. rigidum seeds at all tested treatments. The mean number of germinated seeds of A. sterilis was (6) out of (20) seeds /petri dish whereas, it was nearly (3) geminated seeds with L. rigidum. Both species secured the highest germination percentage at level of alternating temperatures of (10/20 C °) with 40% (mean number of germinated seeds was 8 out of 20 seeds / petri dish) for A. sterilis and 25% (5 out of 20 seeds / petri dish) for L. rigidum. Although A. sterilis seeds showed some germination (25%) at constant temperatures of (8 C°), L. rigidum seeds were less in favorite of this climatic condition expressing its response to alternating temperatures. Generally, A. sterilis seeds showed better germination responses than L. rigidum seeds at all different level of tested temperatures. Moreover, A. sterilis seeds resist water salinity as high as 100 mM of NaCl/L and showed almost 50 % germination especially at its favorite alternating temperature of (10/20 C °). L. rigidum seeds also showed some resistance to 100 mM/L of NaCl giving about 35 % germination. However, both species gave poor germination at higher levels of water salinity of 300 and 500 mM of NaCl/L concentrations. Results confirmed that both species seeds germination are in favorite of moderate alternating temperatures condition expressing some resistance to water salinity. This explains both species invasion and persistence in arable lands being reported a serious weedy plant species especially in a Mediterranean climate and subtropical conditions. In addition those results showed some of the two species seed biological aspects, which could contribute to a better control practice of the two species in arable lands.
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3

TAN, M.-K., C. PRESTON, and G.-X. WANG. "Molecular basis of multiple resistance to ACCase-inhibiting and ALS-inhibiting herbicides in Lolium rigidum." Weed Research 47, no. 6 (December 2007): 534–41. http://dx.doi.org/10.1111/j.1365-3180.2007.00591.x.

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4

Campos, Catarina, Tânia Nobre, Michael J. Goss, Jorge Faria, Pedro Barrulas, and Mário Carvalho. "Transcriptome Analysis of Wheat Roots Reveals a Differential Regulation of Stress Responses Related to Arbuscular Mycorrhizal Fungi and Soil Disturbance." Biology 8, no. 4 (December 11, 2019): 93. http://dx.doi.org/10.3390/biology8040093.

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Symbioses with soil microorganisms are central in shaping the diversity and productivity of land plants and provide protection against a diversity of stresses, including metal toxicity. Arbuscular mycorrhizal fungi (AMF) can form extensive extraradical mycelial networks (ERM), which are very efficient in colonizing a new host. We quantified the responses of transcriptomes of wheat and one AMF partner, Rhizoglomus irregulare, to soil disturbance (Undisturbed vs. Disturbed) and to two different preceding mycotrophic species (Ornithopus compressus and Lolium rigidum). Soil disturbance and preceding plant species engender different AMF communities in wheat roots, resulting in a differential tolerance to soil manganese (Mn) toxicity. Soil disturbance negatively impacted wheat growth under manganese toxicity, probably due to the disruption of the ERM, and activated a large number of stress and starvation-related genes. The O. compressus treatment, which induces a greater Mn protection in wheat than L. rigidum, activated processes related to cellular division and growth, and very few related to stress. The L. rigidum treatment mostly induced genes that were related to oxidative stress, disease protection, and metal ion binding. R. irregulare cell division and molecular exchange between nucleus and cytoplasm were increased by O. compressus. These findings are highly relevant for sustainable agricultural systems, when considering a fit-for-purpose symbiosis.
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5

Poblaciones, Maria J., Paul Damon, and Zed Rengel. "Foliar zinc biofortification effects in Lolium rigidum and Trifolium subterraneum grown in cadmium-contaminated soil." PLOS ONE 12, no. 9 (September 26, 2017): e0185395. http://dx.doi.org/10.1371/journal.pone.0185395.

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6

Canals, R. M., L. S. Emeterio, and J. Peralta. "Autotoxicity in Lolium rigidum: analyzing the role of chemically mediated interactions in annual plant populations." Journal of Theoretical Biology 235, no. 3 (August 2005): 402–7. http://dx.doi.org/10.1016/j.jtbi.2005.01.020.

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7

Kaundun, Shiv S., Richard P. Dale, and Géraldine C. Bailly. "Molecular Basis of Resistance to Herbicides Inhibiting Acetolactate Synthase in Two Rigid Ryegrass (Lolium rigidum) Populations from Australia." Weed Science 60, no. 2 (June 2012): 172–78. http://dx.doi.org/10.1614/ws-d-11-00147.1.

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Acetolactate Synthase- (ALS) inhibiting herbicides are important components for the control of ryegrass species infesting cereal-cropping systems worldwide. Although resistance to ALS herbicides in ryegrasses has evolved more than 25 yr ago, few studies have been dedicated to elucidate the molecular mechanisms involved. To this end, we have investigated the molecular basis of chlorsulfuron, sulfometuron-methyl, and imazapyr resistance in AUS5 and AUS23, two ryegrass populations from Australia. Comparison between whole-plant herbicide assays and DNA sequencing results showed that resistance to the nonmetabolizable herbicide sulfometuron-methyl was associated with four different proline mutations at ALS codon position 197 (P197) in AUS23. In addition to three P197 amino acid changes impacting on the efficacies of the two sulfonylurea herbicides, the tryptophan to leucine target-site mutation at ALS codon position 574 (W574L) was present in AUS5, conferring resistance to both sulfometuron-methyl and imazapyr. The samples were also characterized by non target-site-based resistance impacting on the metabolizable herbicide chlorsulfuron only. Interestingly, compound mutant heterozygotes threonine/serine at ALS position 197, and plants with double mutations at positions 197 and 574 were detected, thus reflecting the ability of this outcrossing species to accumulate mutant alleles. Whole-plant dose-response assays conducted on predetermined wild-type and mutant genotypes originating from the same populations allowed for a more precise estimation of the dominant and very high levels of resistance associated with the proline to serine target-site mutation at ALS codon position 197 (P197S) and W574L mutations. The two highly efficient polymerase chain reaction- (PCR) based derived cleaved amplified polymorphic sequence (dCAPS) markers developed here will allow for quick confirmation of 197 and 574 ALS target-site resistance in ryegrass species field samples and also contribute to identify populations characterized by other likely resistance mechanisms in this important weed species.
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8

COLLAVO, A., and M. SATTIN. "Resistance to glyphosate in Lolium rigidum selected in Italian perennial crops: bioevaluation, management and molecular bases of target-site resistance." Weed Research 52, no. 1 (September 16, 2011): 16–24. http://dx.doi.org/10.1111/j.1365-3180.2011.00883.x.

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9

Zhang, Xiao-Qi, and Stephen B. Powles. "The molecular bases for resistance to acetyl co-enzyme A carboxylase (ACCase) inhibiting herbicides in two target-based resistant biotypes of annual ryegrass (Lolium rigidum)." Planta 223, no. 3 (August 23, 2005): 550–57. http://dx.doi.org/10.1007/s00425-005-0095-x.

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10

de Nova, Pedro J. G., Marcelino de la Cruz, Juan V. Monte, and Consuelo Soler. "Genetic relationships within and among Iberian fescues (Festuca L.) based on PCR-amplified markers." Genome 49, no. 9 (September 2006): 1170–83. http://dx.doi.org/10.1139/g06-077.

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The genus Festuca comprises approximately 450 species and is widely distributed around the world. The Iberian Penninsula, with more than 100 taxa colonizing very diverse habitats, is one of its main centers of diversification. This study was conducted to assess molecular genetic variation and genetic relatedness among 91 populations of 31 taxa of Iberian fescues, based on several molecular markers (random amplified polymorphic DNA, amplified fragment length polymorphisms, and trnL sequences). The analyses showed the paraphyletic origin of the broad-leaved (subgenus Festuca , sections Scariosae and Subbulbosae, and subgenus Schedonorus ) and the fine-leaved fescues (subgenus Festuca, sections Aulaxyper, Eskia, and Festuca). Schedonorus showed a weak relationship with Lolium rigidum and appeared to be the most recent of the broad-leaved clade. Section Eskia was the most ancient and Festuca the most recent of the fine-leaved clade. Festuca and Aulaxyper were the most related sections, in concordance with their taxonomic affinities. All taxa grouped into their sections, except F. ampla and F. capillifolia (section Festuca), which appeared to be more closely related to Aulaxyper and to a new independent section, respectively. Most populations clustered at the species level, but some subspecies and varieties mixed their populations. This study demonstrated the value in combining different molecular markers to uncover hidden genetic relationships between populations of Festuca.
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Dissertations / Theses on the topic "Lolium rigidum Molecular aspects"

1

Dillon, Natalie. "Cytochrome P450 monooxygenase (CYP450) analysis in Lolium rigidum Gaudin / Natalie Dillon." 2001. http://hdl.handle.net/2440/22498.

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"July 2001"
Includes bibliographical references (leaves 144-183)
xv, 193 leaves : ill., plates (col.) ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2002
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2

Mitchell, Aaron Thomas. "Genetic and molecular biological studies of annual ryegrass resistance to Anguina funesta / Aaron Thomas Mitchell." 2002. http://hdl.handle.net/2440/21972.

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"December 2002"
Corrections on back page.
Bibliography: leaves 118-129.
129 leaves : ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Annual ryegrass toxicity (ARGT) occurs in grazing animals following the ingestion of seedheads of the annual ryegrass Lolium rigidum, infested with the corynetoxin-producing bacteria, Rathayibacter toxicus. Breaking the disease cycle, through the use of lines of L. rigidum resistant to the nematode Anguina funesta can be used to reduce th risk of ARGT outbreaks. In L. rigidum, resistance to A. funesta appears to be under the control of two unknown, but complementary genes. This study explored alternate approaches towards the allocation of genotype for lines of L. rigidum with respect to resistance to A. funesta.
Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2003
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