Top 10 Biorxiv Papers Today in Plant Biology


2.024 Mikeys
#1. Evidence for dual targeting of Arabidopsis plastidial glucose-6-phosphate transporter GPT1 to peroxisomes via the ER
Marie-Christin Baune, Hannes Lansing, Kerstin Fischer, Tanja Meyer, Lennart Charton, Nicole Linka, Antje von Schaewen
Former studies on Arabidopsis glucose-6-phosphate/phosphate translocator isoforms GPT1 and GPT2 reported viability of gpt2 mutants, however an essential function for GPT1, manifesting as a variety of gpt1 defects in the heterozygous state during fertilization/seed set. Among other functions, GPT1 is important for pollen and embryo-sac development. Since previous work on enzymes of the oxidative pentose phosphate pathway (OPPP) revealed comparable effects, we investigated whether GPT1 might dually localize to plastids and peroxisomes. In reporter fusions, GPT2 was found at plastids, but GPT1 also at the endoplasmic reticulum (ER) and around peroxisomes. GPT1 contacted oxidoreductases and also peroxins that mediate import of peroxisomal membrane proteins from the ER, hinting at dual localization. Reconstitution in yeast proteoliposomes revealed that GPT1 preferentially exchanges glucose-6-phosphate for ribulose-5-phosphate. Complementation analyses of heterozygous gpt1 plants demonstrated that GPT2 is unable to compensate for GPT1...
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biorxivpreprint: Evidence for dual targeting of Arabidopsis plastidial glucose-6-phosphate transporter GPT1 to peroxisomes via the ER https://t.co/YGFDQXEtwT #bioRxiv
biorxiv_plants: Evidence for dual targeting of Arabidopsis plastidial glucose-6-phosphate transporter GPT1 to peroxisomes via the ER https://t.co/bic9irb9qx #biorxiv_plants
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Authors: 7
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2.024 Mikeys
#2. A receptor-like kinase mediated phosphorylation of Gα protein affects signaling during nodulation
Swarup Roy Choudhury, Sona Pandey
Heterotrimeric G-proteins, comprised of Gα, Gβ and Gγ subunits regulate signaling in eukaryotes. In metazoans, G-proteins are activated by GPCR-mediated GDP to GTP exchange on Gα; however, the role of receptors in regulating plant G-protein signaling remains equivocal. Mounting evidence points to the involvement of receptor-like kinases (RLKs) in regulating plant G-protein signaling pathways, but their mechanistic details remain limited. We have previously shown that during soybean nodulation, the nod factor receptor 1 (NFR1) interacts with G-protein components and indirectly controls signaling. We explored the direct regulation of G-protein signaling by RLKs using protein-protein interactions, receptor-mediated phosphorylation and the effects of such phosphorylations on soybean nodule formation. Results presented in this study demonstrate a direct, phosphorylation-based regulation of Gα by symbiosis receptor kinase (SymRK). SymRKs interact with and phosphorylate Gα at multiple residues, including two in its active site, which...
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biorxivpreprint: A receptor-like kinase mediated phosphorylation of Gα protein affects signaling during nodulation https://t.co/o2ovmfgRt3 #bioRxiv
biorxiv_plants: A receptor-like kinase mediated phosphorylation of Gα protein affects signaling during nodulation https://t.co/0WwkPWbylj #biorxiv_plants
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2.024 Mikeys
#3. Element content and distribution has limited, tolerance metric dependent, impact on salinity tolerance in cultivated sunflower (Helianthus annuus)
Andries A Temme, Victoria (Torey) A Burns, Lisa A Donovan
Disruption of ion homeostasis is a major component of salinity stress's effect on crop yield. In cultivated sunflower prior work revealed a trade-off between vigor and salinity tolerance. Here we determined the association of elemental content/distribution traits with salinity tolerance, both with and without taking this trade-off into account. We grew seedlings of twelve Helianthus annuus genotypes in two treatments (0/100 mM NaCl). Plants were measured for biomass (+allocation), and element content (Na, P, K, Ca, Mg, S, Fe, B, Mn, Cu, Zn) in leaves (young and mature), stem, and roots. Genotype tolerance was determined by the proportional decline in biomass and as the deviation from the expected vigor/tolerance trade-off. Genotype rankings on these metrics were not the same. Elemental content and allocation/distribution were highly correlated both at the plant and organ level. Suggestive associations between tolerance and elemental traits were fewer and weaker than expected and differed by tolerance metric. Given the highly...
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biorxivpreprint: Element content and distribution has limited, tolerance metric dependent, impact on salinity tolerance in cultivated sunflower (Helianthus annuus) https://t.co/UyaOFOepDL #bioRxiv
biorxiv_plants: Element content and distribution has limited, tolerance metric dependent, impact on salinity tolerance in cultivated sunflower ... https://t.co/YPiI0r5V1m #biorxiv_plants
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2.011 Mikeys
#4. Viola unica (Violaceae L.), a very rare, high elevation, single site new species endemic to the northern semi-desert Altiplano of Chile
Ana R. Flores, John M. Watson
While examining the Viola collection at the herbarium (SGO) of the Museo Nacional de Historia Natural (MNHN), Santiago, we encountered a folder with a single unidentified specimen consisting of a solitary rosette. It had been found in northern Chile near the border with Bolivia, where considerable mining activity takes place. The plant appeared to differ from all others related to it as known to ourselves, and on investigation it did indeed prove to be undescribed. It is presented herein, together with a detailed analysis and preliminary partial revision of related taxa, including a key. Key words: Altiplano, Andes, copper mining, endangered, section Andinium, solitary specimen, Tarapaca Region, Triflabellatae, unknown collector.
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biorxivpreprint: Viola unica (Violaceae L.), a very rare, high elevation, single site new species endemic to the northern semi-desert Altiplano of Chile https://t.co/yxen35zCKm #bioRxiv
biorxiv_plants: Viola unica (Violaceae L.), a very rare, high elevation, single site new species endemic to the northern semi-desert Altiplano of Chile https://t.co/cqeoPkn6yG #biorxiv_plants
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2.002 Mikeys
#5. The regulatory landscape of early maize inflorescence development
Rajiv K Parvathaneni, Edoardo Bertolini, Md Shamimuzzaman, Daniel Vera, Pei-Yau Lung, Brian R Rice, Patrick J Brown, Alexander E Lipka, Hank W Bass, Andrea L Eveland
The functional genome of agronomically important plant species remains largely unexplored, yet presents a virtually untapped resource for targeted crop improvement. Functional elements of regulatory DNA revealed through profiles of chromatin accessibility can be harnessed for fine-tuning gene expression to optimal phenotypes in specific environments. Here, we investigate the non-coding regulatory space in the maize (Zea mays) genome during early reproductive development of pollen- and grain-bearing inflorescences. Using an assay for differential sensitivity of chromatin to micrococcal nuclease (MNase) digestion, we profiled accessible chromatin and nucleosome occupancy in these largely undifferentiated tissues and classified approximately 1.6 percent of the genome as accessible, with the majority of MNase hypersensitive sites marking proximal promoters, but also 3' ends of maize genes. This approach mapped regulatory elements to footprint-level resolution. Integration of complementary transcriptome profiles and transcription...
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biorxivpreprint: The regulatory landscape of early maize inflorescence development https://t.co/oev6ra4YFQ #bioRxiv
biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
AW_NGS: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
meter: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
TJesse62: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
AmanHusbands: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
MaizeZynskiHI: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
jfgumarc: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
RavirajBanakar: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
thelma_madzima: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
ji_timedreamer: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
diep_ganguly: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
ramki17071993: RT @biorxiv_plants: The regulatory landscape of early maize inflorescence development https://t.co/jpA4G2bV5o #biorxiv_plants
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2.0 Mikeys
#6. A stomatal model of anatomical tradeoffs between photosynthesis and pathogen defense
Christopher D Muir
Stomatal pores control both leaf gas exchange and are an entry for many plant pathogens, setting up the potential for tradeoffs between photosynthesis and defense. To prevent colonization and limit infection, plants close their stomata after recognizing pathogens. In addition to closing stomata, anatmoical shifts to lower stomatal density and/or size may also limit pathogen colonization, but such developmental changes would permanently reduce the gas exchange capacity for the life of the leaf. I developed and analyzed a spatially explicit model of pathogen colonization on the leaf as a function of stomatal size and density, anatomical traits which determine maximum rates of gas exchange. The model predicts greater stomatal size or density increases colonization, but the effect is most pronounced when stomatal cover is low. I also derived scaling relationships between stomatal size and density that preserves a given probability of colonization. These scaling relationships set up a potential conflict between maximizing defense and...
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SelvarajGuru: RT @biorxiv_plants: A stomatal model of anatomical tradeoffs between photosynthesis and pathogen defense https://t.co/FWw4F3uv8Z #biorxiv_…
arbona_vicent: RT @biorxiv_plants: A stomatal model of anatomical tradeoffs between photosynthesis and pathogen defense https://t.co/FWw4F3uv8Z #biorxiv_…
KeYu_PMI: RT @biorxiv_plants: A stomatal model of anatomical tradeoffs between photosynthesis and pathogen defense https://t.co/FWw4F3uv8Z #biorxiv_…
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1.997 Mikeys
#7. Mutagenesis of two homologs ATP Binding cassette protein in tomato by CRISPR/Cas9 provide resistance against the plant parasite Phelipanche aegyptiaca
Vinay Kumar Bari, Radi Aly, Jackline Abu Nassar, Ayala Meir
Plant parasitic weed Phelipanche aegyptiaca and Orobanche spp. are obligate plant parasites that cause heavy damage to agricultural crop plants. Germination of the parasite seeds require exposure to specific chemical known as strigolactone [SL].The plant hormone SL is derived from plant carotenoids via cleavage by CCD7 and CCD8 enzymes and exuded by the host roots to the rhizosphere. Here, we provide evidence that CRISPR/Cas9 mediated targeted mutagenesis of two homologues ATP Binding cassette (ABC) protein in tomato (Solyc08g067610 and Solyc08g067620), significantly reduced the germination of the parasitic weed P.aegyptiaca. Constructs harboring specific single guide RNA were prepared and targeted against conserved region in the above tomato genes (Solyc08g067610 and Solyc08g067620). Selected T0-mutated tomato plants showed different type of deletions at both locuses. Furthermore, genotype analysis of T1 plants showed that the introduced mutations stably inherited to next generation with no identified off-targets. Mutated tomato...
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biorxivpreprint: Mutagenesis of two homologs ATP Binding cassette protein in tomato by CRISPR/Cas9 provide resistance against the plant parasite Phelipanche aegyptiaca https://t.co/ocPivex4vI #bioRxiv
biorxiv_plants: Mutagenesis of two homologs ATP Binding cassette protein in tomato by CRISPR/Cas9 provide resistance against the plant parasite ... https://t.co/Tv4XEnFwes #biorxiv_plants
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Authors: 4
Total Words: 8400
Unqiue Words: 2879

1.997 Mikeys
#8. Na2CO3-Responsive Photosynthetic and ROS Scavenging Mechanisms in Chloroplasts of Alkaligrass Revealed by Phosphoproteomics
Jinwei Suo, Heng Zhang, Qi Zhao, Nan Zhang, Yongxue Zhang, Ying Li, Baohua Song, Juanjuan Yu, Jianguo Cao, Tai Wang, Ji Luo, Lihai Guo, Jun Ma, Xumin Zhang, Yimin She, Lianwei Peng, Weimin Ma, Siyi Guo, Yuchen Miao, Sixue Chen, Zhi Qin, Shaojun Dai
Alkali-salinity exerts severe osmotic, ionic and high-pH stresses to plants. To understand the alkali-salinity responsive mechanisms underlying photosynthetic modulation and reactive oxygen species (ROS) homeostasis, physiological and diverse quantitative proteomics analyses of alkaligrass (Puccinellia tenuiflora) under Na2CO3 stress were conducted. In addition, Western blot, real-time PCR, and transgenic techniques were applied to validate the proteomic results and test the functions of the Na2CO3-responsive proteins. A total of 104 and 102 Na2CO3-responsive proteins were identified in leaves and chloroplasts, respectively. In addition, 84 Na2CO3-responsive phosphoproteins were identified, including 56 new phosphorylation sites in 56 phosphoproteins from chloroplasts, which are crucial for the regulation of photosynthesis, ion transport, signal transduction and energy homeostasis. A full-length PtFBA encoding an alkaligrass chloroplastic fructose-bisphosphate aldolase (FBA) was overexpressed in wild-type cells of cyanobacterium...
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biorxivpreprint: Na2CO3-Responsive Photosynthetic and ROS Scavenging Mechanisms in Chloroplasts of Alkaligrass Revealed by Phosphoproteomics https://t.co/IEFajjZvAn #bioRxiv
biorxiv_plants: Na2CO3-Responsive Photosynthetic and ROS Scavenging Mechanisms in Chloroplasts of Alkaligrass Revealed by Phosphoproteomics https://t.co/MCwE5kCjKK #biorxiv_plants
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1.997 Mikeys
#9. In Situ Processing and Efficient Environmental Detection (iSPEED) of pests and pathogens of trees using point-of-use real-time pcr
Arnaud Capron Hamelin, Don Stewart, Kelly Hrywkiw, Kiah Allen, Nicolas Feau, Guillaume Bilodeau, Philippe Tanguay, Michel Cusson, Richard C. Hamelin
The increase in global trade is responsible for a surge in foreign invasive species introductions across the world. Early detection and surveillance activities are essential to prevent future invasions. Molecular diagnostics by DNA testing has become an integral part of this process. However, for environmental applications, there is a need for cost-effective and efficient point-of-use DNA testing that would allow for the collection of results in real-time away from laboratory facilities. To achieve this requires the development of simple and fast sample processing and DNA extraction, room-temperature stable reagents and a portable instrument. We conducted a series of tests using a crude buffer-based DNA extraction protocol and lyophilized, pre-made, reactions to address the first two requirements. We chose to demonstrate the use of this approach with organisms that cover a broad spectrum of known undesirable insects and pathogens: the ascomycete Sphaerulina musiva , the oomycete Phytophthora ramorum , the basidiomycetes Cronartium...
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Authors: 9
Total Words: 8174
Unqiue Words: 2646

1.994 Mikeys
#10. Assessment of Water Stress Tolerance in Mungbean Induced by Polyethyline Glycol
ayman elsabagh, Mohammad Rafiqul Islam, Mohammad Sohidul Islam, Bikash Chandra Sarker, Md. Ashraful Alam, Mst. Masuma Akhter, Mohammad Jahangir Alam, Hirofumi Saneoka, Murat Erman
Water scarcity is a common hindrance of crop production in the globe especially in dry regions due to low precipitation along with high air temperature. Mungbean is a valuable pulse crop faced considerable amount of water shortage during its growing periods (March-May). Thus, the study was carried out to find out the variability and diversity present in the mungbean genotypes based on genetic variation of germination and seedling growth traits induced by polyethyline glycol (PEG-6000) stress ( - 0.7, - 1, - 2 and -4 bar). Seeds of each genotype was placed in a 9 cm diameter petridish containing sand bed that moistened by respective prepared PEG solutions and allowed to grow up to 10 days after placement.The result showed that the phenotypic coefficient of variation was significantly greater than the genotypic coefficient of variation for the entire studies traits, representing that these traits was influence by the environmental factors. The heritability showed moderate to high (24.26%-99.19%) under the observed traits indicating...
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