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Plant & Cell Physiology

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https://www.readbyqxmd.com/read/28541504/e3-ubiquitin-ligases-ubiquitous-actors-in-plant-development-and-abiotic-stress-responses
#1
Kai Shu, Wenyu Yang
Understanding the precise regulatory mechanisms of plant development and stress responses at the post-translational level is currently a topic of intensive research. Protein ubiquitination, including the sequential performances of ubiquitin-activating (E1), ubiquitin-conjugating (E2) and ubiquitin ligase (E3) enzymes, is a refined post-translational modification ubiquitous in all eukaryotes. Plants are an integral part of our ecosystem and, as sessile organisms, the ability to perceive internal and external signals and to adapt well to various environmental challenges is crucial for their survival...
May 25, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28505371/the-arm-domain-of-armadillo-repeat-kinesin-1-is-not-required-for-microtubule-catastrophe-but-can-negatively-regulate-nima-related-kinase-6-in-arabidopsis-thaliana
#2
Ryan C Eng, Laryssa S Halat, Samuel J Livingston, Tatsuya Sakai, Hiroyasu Motose, Geoffrey Wasteneys
Microtubules are dynamic filaments, the assembly and disassembly of which are under precise control of various associated proteins, including motor proteins and regulatory enzymes. In Arabidopsis thaliana, two such proteins are the ARMADILLO-REPEAT KINESIN 1 (ARK1), which promotes microtubule disassembly, and the NIMA-RELATED KINASE 6 (NEK6), which has a role in organizing microtubule arrays. Previous yeast 2-hybrid and in vitro pull-down assays determined that NEK6 can interact with ARK1 through the latter protein's Armadillo-repeat (ARM) cargo domain...
May 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28505342/letter-author-response-analysis-of-rhizome-development-in-oryza-longistaminata-a-wild-rice-species
#3
Kyozuka Junko
No abstract text is available yet for this article.
May 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28482045/using-gcamp3-to-study-ca2-signaling-in-nicotiana-species
#4
Thomas A DeFalco, Masatsugu Toyota, Van Phan, Purva Karia, Wolfgang Moeder, Simon Gilroy, Keiko Yoshioka
Ca2+ signaling is a central component of plant biology; however, direct analysis of in vivo Ca2+ levels is experimentally challenging. In recent years the use of genetically-encoded Ca2+ indicators have revolutionized the study of plant Ca2+ signaling, although such studies have been largely restricted to the model plant Arabidopsis. We have developed stable transgenic Nicotiana benthamiana and Nicotiana tabacum lines expressing the single-wavelength fluorescent Ca2+ indicator, GCaMP3. Ca2+ levels in these plants can be imaged in situ using fluorescence microscopy, and these plants can be used to both qualitatively and semi-quantitatively evaluate Ca2+ signals in response to a broad array of abiotic or biotic stimuli, such as cold-shock or pathogen-associated molecular patterns (PAMPs)...
May 8, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28482073/the-pepper-wpp-domain-protein-cawdp1-acts-as-a-novel-negative-regulator-of-drought-stress-via-aba-signaling
#5
(no author information available yet)
No abstract text is available yet for this article.
May 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28460115/bud-position-and-carbohydrate-play-a-more-significant-role-than-light-condition-in-the-developmental-transition-between-rhizome-buds-and-aerial-shoot-buds-of-oryza-longistaminata
#6
Zhiquan Fan, Zhongquan Cai, Jianwei Shan, Jiangyi Yang
No abstract text is available yet for this article.
April 27, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28449056/plant-hexokinases-are-multifaceted-proteins
#7
Giovanna P Aguilera-Alvarado, Sobeida Sánchez-Nieto
Sugars are the main carbon and energy source in cells, but they can also act as signaling molecules that affect the whole plant life cycle. Certain tissues can produce sugars and supply them to others, and this plant tissue heterogeneity makes sugar signaling a highly complex process that requires elements capable of perceiving changes in sugar concentrations among different tissues, cell compartments and developmental stages. In plants, the regulatory effects of Glucose (Glc) have been the most studied to date...
April 25, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444344/hydrogen-sulfide-regulates-the-cytosolic-nuclear-partitioning-of-glyceraldehyde-3-phosphate-dehydrogenase-by-enhancing-its-nuclear-localization
#8
Ángeles Aroca, Markus Schneider, Renate Scheibe, Cecilia Gotor, Luis C Romero
Hydrogen sulfide is an important signaling molecule comparable to nitric oxide and hydrogen peroxide in plants. The underlying mechanism of its action is unknown, although it has been proposed to be S-sulhydration. This posttranslational modification converts the thiol groups of cysteines within proteins to persulfides, resulting in functional changes of the proteins. In Arabidopsis thaliana, S-sulfhydrated proteins have been identified, including the cytosolic isoforms of glyceraldehyde-3-phosphate dehydrogenase GapC1 and GapC2...
April 24, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444368/simultaneous-targeting-of-multiple-gene-homeologues-to-alter-seed-oil-production-in-camelina-sativa
#9
J A Aznar-Moreno, T P Durrett
The ability to easily transform Camelina sativa with biosynthetic enzymes derived from other plants has made this oil seed crop an ideal platform for the production of unusual lipids valuable for different applications. However, in addition to expressing transgenic enzymes, the suppression of endogenous enzyme activity to reduce competition for common substrates or cofactors is also required to enhance the production of target compounds. As camelina possesses a relatively undifferentiated hexaploid genome, up to three gene homeologues can encode for any particular enzymatic activity, complicating efforts to alter endogenous biosynthetic pathways...
April 21, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444357/coordinated-regulations-of-mrna-synthesis-and-decay-during-cold-acclimation-in-arabidopsis-cells
#10
Toshihiro Arae, Shiori Isai, Akira Sakai, Katsuhiko Mineta, Masami Yokota Hirai, Yuya Suzuki, Shigehiko Kanaya, Junji Yamaguchi, Satoshi Naito, Yukako Chiba
Plants possess a cold acclimation system to acquire freezing tolerance through pre-exposure to non-freezing low temperatures. The transcriptional cascade of C-repeat binding factors (CBFs)/dehydration response element-binding factors (DREBs) is considered a major transcriptional regulatory pathway during cold acclimation. However, little is known regarding the functional significance of mRNA stability regulation in the response of gene expression to cold stress. The actual level of individual mRNAs is determined by a balance between mRNA synthesis and degradation...
April 21, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444333/a-non-classical-member-of-the-protein-disulfide-isomerase-family-pdi7-of-arabidopsis-thaliana-localizes-to-the-cis-golgi-and-endoplasmic-reticulum-membranes
#11
Christen Y L Yuen, Pengfei Wang, Byung-Ho Kang, Kristie Matsumoto, David A Christopher
Members of the protein disulfide isomerase (PDI)-C subfamily are chimeric proteins containing the thioredoxin (Trx) domain of PDIs, and the conserved N- and C-terminal Pfam domains of Erv41p/Erv46p-type cargo receptors. They are unique to plants and chromalveolates. The Arabidopsis genome encodes three PDI-C isoforms: PDI7, PDI12, and PDI13. Here we demonstrate that PDI7 is a 65-kDa integral membrane glycoprotein expressed throughout many Arabidopsis tissues. Using a PDI7-specific antibody, we show through immunoelectron microscopy that PDI7 localizes to the endoplasmic reticulum (ER) and Golgi membranes in wild-type root tip cells, and was also detected in vesicles...
April 21, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444301/soybean-nima-related-kinase1-promotes-plant-growth-and-improves-salt-and-cold-tolerance
#12
Wen-Jia Pan, Jian-Jun Tao, Tong Cheng, Ming Shen, Jin-Biao Ma, Wan-Ke Zhang, Qin Lin, Biao Ma, Shou-Yi Chen, Jin-Song Zhang
NEK (NIMA-related kinase) is known as a family of serine/threonine kinases which mainly participate in microtubule-related mitotic events in fungi, mammals and other eukaryotes. Our previous studies found that Arabidopsis NEK6 plays an important role in plant response to abiotic stress. We further investigated roles of NEK family in soybean and found that at least eight members can respond to abiotic stresses. Among them, only GmNEK1, a novel NEK member which is distantly-related to Arabidopsis NEK6, enhanced plant growth and promoted salt and cold tolerance in transgenic Arabidopsis plants...
April 21, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444222/feronia-receptor-kinase-at-the-crossroad-of-hormone-signaling-and-stress-responses
#13
Hongdong Liao, Renjie Tang, Xin Zhang, Sheng Luan, Feng Yu
Plant receptor-like kinases (RLKs) are involved in nearly all aspects of plant life including growth, development and stress response. Recent studies show that FERONIA (FER), a CrRLK1L subfamily member, is a versatile regulator of cell expansion and serves as a signaling node mediating crosstalks among multiple phytohormones. As a receptor for the RALF (Rapid Alkalinization Factor) peptide ligand, FER triggers a downstream signaling cascade that leads to a rapid cytoplasmic calcium increase and inhibition of cell elongation in plants...
April 19, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28419348/litchi-fruit-lcnac1-is-a-target-of-lcmyc2-and-regulator-of-fruit-senescence-through-its-interaction-with-lcwrky1
#14
Guoxiang Jiang, Huiling Yan, Fuwang Wu, Dandan Zhang, Wei Zeng, Hongxia Qu, Feng Chen, Li Tan, Xuewu Duan, Yueming Jiang
Senescence is a key factor resulting in deterioration of non-climacteric fruit. NAC transcription factors are important regulators in plant development and abiotic stress responses, yet little information regarding the role of NACs in regulating non-climacteric fruit senescence is available. In this study, we cloned 13 NAC genes from litchi (Litchi chinensis) fruit, and analyzed subcellular localization and expression profiles of these genes during postharvest natural and low-temperature-delayed senescence...
April 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28419331/an-apoplastic-%C3%AE-glucosidase-is-essential-for-the-degradation-of-flavonol-3-o-%C3%AE-glucoside-7-o-%C3%AE-rhamnosides-in-arabidopsis
#15
Jonathon Roepke, Harley O W Gordon, Kevin J A Neil, Satinder Gidda, Robert T Mullen, José A Freixas Coutin, Delaney Bray-Stone, Gale G Bozzo
Flavonol bisglycosides accumulate in plant vegetative tissues in response to abiotic stress, including simultaneous environmental perturbations (i.e., nitrogen deficiency and low temperature, NDLT), but disappear with recovery from NDLT. Previously, we determined that a recombinant Arabidopsis β-glucosidase (BGLU), BGLU15, hydrolyzes flavonol 3-O-β-glucoside-7-O-α-rhamnosides and flavonol 3-O-β-glucosides, forming flavonol 7-O-α-rhamnosides and flavonol aglycones, respectively. In this study, the transient expression of a BGLU15-Cherry fusion protein in onion epidermal cells demonstrated that BGLU15 was localized to the apoplast...
April 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28419310/calmodulin-as-a-ca2-sensing-subunit-of-arabidopsis-cyclic-nucleotide-gated-channel-complexes
#16
Cornelia Fischer, Thomas A DeFalco, Purva Karia, Wayne A Snedden, Wolfgang Moeder, Keiko Yoshioka, Petra Dietrich
Ca2+ serves as a universal second messenger in eukaryotic signaling pathways, and the spatial and temporal patterns of Ca2+ concentration changes are determined by feedback and feed-forward regulation of the involved transport proteins. Cyclic nucleotide-gated channels (CNGCs) are Ca2+-permeable channels that interact with the ubiquitous Ca2+ sensor calmodulin (CaM). CNGCs interact with CaMs via diverse CaM-binding sites, including an IQ-motif, which has been identified in the C-termini of CNGC20 and CNGC12...
April 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28407124/structure-and-biosynthesis-of-branched-wax-compounds-on-wild-type-and-wax-biosynthesis-mutants-of-arabidopsis-thaliana
#17
Lucas Busta, Reinhard Jetter
The cuticle is a waxy composite that protects the aerial organs of land plans from non-stomatal water loss. The chemical makeup of the cuticular wax mixture plays a central role in defining the water barrier, but structure-function relationships have not been established so far, in part due to gaps in our understanding of wax structures and biosynthesis. While wax compounds with saturated, linear hydrocarbon tails have been investigated in detail, very little is known about compounds with modified aliphatic tails, which comprise substantial portions of some plant wax mixtures...
April 12, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28407091/brassinosteroid-involvement-in-arabidopsis-thaliana-stomatal-opening
#18
Shin-Ichiro Inoue, Nozomi Iwashita, Yohei Takahashi, Eiji Gotoh, Eiji Okuma, Maki Hayashi, Ryohei Tabata, Atsushi Takemiya, Yoshiyuki Murata, Michio Doi, Toshinori Kinoshita, Ken-Ichiro Shimazaki
Stomata within the plant epidermis regulate CO2 uptake for photosynthesis and water loss through transpiration. Stomatal opening in Arabidopsis thaliana is determined by various factors, including blue light as a signal and multiple phytohormones. Plasma membrane transporters, including H+-ATPase, K+ channels, and anion channels in guard cells mediate these processes, and the activities and expression levels of these components determine stomatal aperture. However, the regulatory mechanisms involved in these processes are not fully understood...
April 12, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28387868/transcriptome-analysis-of-the-populus-trichocarpa-rhizophagus-irregularis-mycorrhizal-symbiosis-regulation-of-plant-and-fungal-transportomes-under-nitrogen-starvation
#19
Silvia Calabrese, Annegret Kohler, Annette Niehl, Claire Veneault-Fourrey, Thomas Boller, Pierre-Emmanuel Courty
Nutrient transfer is a key feature of the arbuscular mycorrhizal (AM) symbiosis. Valuable mineral nutrients are transferred from the AM fungus to the plant, increasing its fitness and productivity, and, in exchange, the AM fungus receives carbohydrates as an energy source from the plant. Here, we analyzed the transcriptome of the Populus trichocarpa-Rhizophagus irregularis symbiosis using RNA-sequencing of non-mycorrhizal or mycorrhizal fine roots, with a focus on the effect of nitrogen (N) starvation. In R...
April 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28387856/involvement-of-c-terminal-histidines-in-soybean-pm1-protein-oligomerization-and-cu2-binding
#20
Guobao Liu, Ke Liu, Yang Gao, Yizhi Zheng
Late embryogenesis abundant (LEA) proteins are widely distributed among plant species, where they contribute to abiotic stress tolerance. LEA proteins can be classified into seven groups according to conserved sequence motifs. The PM1 protein from soybean, which belongs to the Pfam LEA_1 group, has been shown previously to be at least partially natively unfolded, to bind metal ions and potentially to stabilize proteins and membranes. Here, we investigated the role of the PM1 C-terminal domain and in particular the multiple histidine residues in this half of the protein...
April 6, 2017: Plant & Cell Physiology
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