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Plant & Cell Physiology

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https://www.readbyqxmd.com/read/28655170/metabolic-balance-and-its-outcome-deficiency-of-vitamin-b9-and-sucrose-supply-ectopically-induces-starch-synthesis-in-etioplasts
#1
Eiji Nambara
No abstract text is available yet for this article.
June 26, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28633497/genome-wide-identification-and-functional-characterization-of-udp-glucosyltransferase-genes-involved-in-flavonoid-biosynthesis-in-glycine-max
#2
Qinggang Yin, Guoan Shen, Shaokang Di, Cunying Fan, Zhenzhan Chang, Yongzhen Pang
Flavonoids, natural products abundant in the model legume Glycine max, confer benefits to plants and animals health. Flavonoids are present in soybean mainly as glycoconjugates. However, the biosynthesis mechanisms of flavonoid glycosides are largely unknown in G. max. In the present study, 212 putative UDP-glycosyltransferase (UGTs) genes were identified in G. max by genome-wide searching. The GmUGT genes were distributed differentially among the twenty chromosomes, and they were expressed in various tissues with distinct expression profile...
June 19, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28633475/cloning-and-characterization-of-cheilanthifoline-and-stylopine-synthase-genes-from-chelidonium-majus
#3
Mahdi Yahyazadeh, Purwanto Ratmoyo, Florian Bittner, Fumihiko Sato, Dirk Selmar
The most prominent alkaloid of Chelidonium majus is dihydrocoptisine, revealing the characteristical benzophenanthridine skeleton. Up to now, any information about the enzymes responsible for its biosynthesis in C. majus and the related genes respectively, is lacking. Based on sequence similarities to the corresponding methylenedioxy bridge-forming cytochrome P450-enzymes involved in the isoquinoline alkaloid biosynthesis in Eschscholzia californica, genes for a cheilanthifoline synthase and a stylopine synthase from C...
June 19, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28637253/synthesis-and-secretion-of-isoflavones-by-field-grown-soybean
#4
Akifumi Sugiyama, Yumi Yamazaki, Shoichiro Hamamoto, Hisabumi Takase, Kazufumi Yazaki
Isoflavones play important roles in rhizosphere plant-microbe interactions. Daidzein and genistein secreted by soybean roots induce the symbiotic interaction with rhizobia and may modulate rhizosphere interactions with microbes. Yet despite their important roles, little is known about the biosynthesis, secretion and fate of isoflavones in field-grown soybeans. Here, we analysed isoflavone contents and the expression of isoflavone biosynthesis genes in field-grown soybeans. In roots, isoflavone contents and composition did not change with crop growth, but the expressions of UGT4, an isoflavone-specific 7-O-glucosyltransferase, and of ICHG (Isoflavone conjugates hydrolysing beta-glucosidase) was decreased during the reproductive stages...
June 16, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28633325/malus-hupehensis-mir168-targets-to-argonaute1-and-contributes-to-the-resistance-against-botryosphaeria-dothidea-infection-by-altering-defense-responses
#5
Xinyi Yu, Yingjun Hou, Weiping Chen, Sanhong Wang, Peihong Wang, Shenchun Qu
MicroRNA-mediated post transcriptional regulation plays a fundamental role in various plant physiological processes, including responses to pathogens. MicroRNA168 has been implicated as an essential factor of miRNA pathways by targeting ARGONAUTE1 (AGO1), the core component of the RNA-induced silencing complex (RISC). A fluctuation in AGO1 expression influences various plant-pathogen interactions, and the homeostasis of AGO1 and miR168 accumulation is maintained by a complicated feedback regulatory loop. In this study, the connection between miR168 and the resistance of M...
June 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28633293/the-tonoplast-localized-transporter-mtp8-2-contributes-to-manganese-detoxification-in-the-shoots-and-roots-of-oryza-sativa-l
#6
Yuma Takemoto, Yuta Tsunemitsu, Miho Fujii-Kashino, Namiki Mitani-Ueno, Naoki Yamaji, Jian Feng Ma, Shin-Ichiro Kato, Kozo Iwasaki, Daisei Ueno
Manganese (Mn) cation diffusion facilitators (Mn-CDFs) play important roles in the Mn homeostasis of plants. In rice, the tonoplast-localized Mn-CDF metal tolerance protein 8.1 (MTP8.1) is involved in Mn detoxification in the shoots. This study functionally characterized the Mn-CDF MTP8.2 and determined its contribution to Mn tolerance. MTP8.2 was found to share 68% identity with MTP8.1 and was expressed in both the shoots and roots, but its transcription level was lower than that of MTP8.1. Transient expression of the MTP8...
June 13, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28586469/dormancy-associated-mads-box-dam-and-abscisic-acid-pathway-regulate-pear-endodormancy-through-a-feedback-mechanism
#7
Pham Anh Tuan, Songling Bai, Takanori Saito, Akiko Ito, Takaya Moriguchi
In the pear 'Kosui' (Pyrus pyrifolia Nakai), dormancy-associated MADS-box (PpDAM1 = PpMADS13-1) gene has been reported to play an essential role in bud endodormancy. Here, we found that PpDAM1 upregulated expression of 9-cis-epoxycarotenoid dioxygenase (PpNCED3), which is a rate-limiting gene for abscisic acid (ABA) biosynthesis. Transient assays with dual luciferase reporter system (LUC assay) and electrophoretic mobility shift assay (EMSA) showed that PpDAM1 activated PpNCED3 expression by binding to the CArG motif in the PpNCED3 promoter...
June 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28586467/plastidial-folate-prevents-starch-biosynthesis-triggered-by-sugar-influx-into-non-photosynthetic-plastids-of-arabidopsis
#8
Makoto Hayashi, Mina Tanaka, Saki Yamamoto, Taro Nakagawa, Masatake Kanai, Aya Anegawa, Miwa Ohnishi, Tetsuro Mimura, Mikio Nishimura
Regulation of sucrose-starch interconversion in plants is important to maintain energy supplies necessary for viability and growth. Arabidopsis mutants were screened for aberrant responses to sucrose to identify candidates with a defect in the regulation of starch biosynthesis. One such mutant, fpgs1-4, accumulated substantial amounts of starch in non-photosynthetic cells. Dark-grown mutant seedlings exhibited shortened hypocotyls and accumulated starch in etioplasts when supplied with exogenous sucrose/glucose...
June 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28586465/ros-induces-anthocyanin-production-via-late-biosynthetic-genes-and-anthocyanin-deficiency-confers-the-hypersensitivity-to-ros-generating-stresses-in-arabidopsis
#9
Zhenhua Xu, Kashif Mahmood, Steven J Rothstein
Anthocyanins are known to have antioxidant activities. Their accumulation can be triggered by many chemical and environmental factors, including reactive oxygen species (ROS). However, the mechanism of ROS-induced anthocyanin accumulation and the role of anthocyanins in the response of Arabidopsis (Arabidopsis thaliana) to different stresses are largely unknown. Here, we study the cross-regulation between ROS and anthocyanin production. Ten Arabidopsis mutants covering the main anthocyanin regulatory and biosynthetic genes are systematically analyzed under ROS-generating stresses...
June 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28586431/proteomic-analysis-of-calcium-effects-on-soybean-root-tip-under-flooding-and-drought-stresses
#10
Xin Wang, Setsuko Komatsu
Flooding and drought are disadvantageous environmental conditions that induce cytosolic calcium in soybean. To explore the effects of flooding- and drought-induced increase in calcium, a gel-free/label-free proteomic analysis was performed. Cytosolic calcium was decreased by blocking calcium channels in the endoplasmic reticulum (ER) and plasma membrane under both stresses. Calnexin, protein disulfide isomerase, heat shock proteins, and thioredoxin were predominately affected as the ER proteins in response to calcium, and ER-associated degradation-related proteins of HCP-like superfamily protein was upregulated under stress exposure and then downregulated...
June 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28575507/advances-in-the-myb-bhlh-wd-repeat-mbw-pigment-regulatory-model-addition-of-a-wrky-factor-and-co-option-of-an-anthocyanin-myb-for-betalain-regulation
#11
Alan Lloyd, Austen Brockman, Lyndsey Aguirre, Annabelle Campbell, Alex Bean, Araceli Cantero, Antonio Gonzalez
Flavonoids are secondary metabolites derived from the general phenylpropanoid pathway and are widespread throughout the plant kingdom. The functions of flavonoids are diverse, including defense against phytopathogens, protection against UV light damage and oxidative stress, regulation of auxin transport and allelopathy. One of the most conspicuous functions of flavonoids has long attracted the attention of pollinators and scientist alike: the vivid shades of red, pink, orange, blue and purple on display in the flowers of angiosperms...
May 30, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28575477/regulation-of-gene-expressions-in-the-remobilization-of-carbon-reserve-in-straws-of-rice-at-grain-filling
#12
Guan-Qun Wang, Shuai-Shuai Hao, Bei Gao, Mo-Xian Chen, Ying-Gao Liu, Jian-Chang Yang, Neng-Hui Ye, Jian-Hua Zhang
Carbon reserves in rice straws before flowering contribute to a significant portion of grain filling. However, the molecular mechanism of carbon reserve remobilization from straws (stem and sheath) to grains remains unclear. In this study, super rice LYP9 and conventional rice 9311 showed different carbon reserves remobilization behaviors. The transcriptomic profiles of straws of LYP9 and 9311 were analyzed at three stages of grain filling. Among the differentially expressed genes (DGs), 5733 genes were uniquely up- or down-regulated at 30 days after anthesis (DAA) between LYP9 and 9311 in comparison to 681 at 10 DAA and 495 at 20 DAA, respectively, suggesting that the gene expression profile of LYP9 was much different than that of 9311 at late stage of grain filling...
May 29, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28541504/e3-ubiquitin-ligases-ubiquitous-actors-in-plant-development-and-abiotic-stress-responses
#13
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/28575525/cytochrome-p450-monooxygenase-cyp716a141-is-a-unique-b-amyrin-c-16b-oxidase-involved-in-triterpenoid-saponin-biosynthesis-in-platycodon-grandiflorus
#14
Keita Tamura, Yuga Teranishi, Shinya Ueda, Hideyuki Suzuki, Noriaki Kawano, Kayo Yoshimatsu, Kazuki Saito, Nobuo Kawahara, Toshiya Muranaka, Hikaru Seki
No abstract text is available yet for this article.
June 1, 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
#15
Chanmi Park, Woo Chae Lim, Woonhee Baek, Jung-Hyun Kim, Sohee Lim, Hyon Sang Kim, Kyung-Nam Kim, Chul Sung Lee
No abstract text is available yet for this article.
June 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28444357/co-ordinated-regulations-of-mrna-synthesis-and-decay-during-cold-acclimation-in-arabidopsis-cells
#16
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...
June 1, 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
#17
Angeles Aroca, Markus Schneider, Renate Scheibe, Cecilia Gotor, Luis C Romero
Hydrogen sulfide is an important signaling molecule comparable with nitric oxide and hydrogen peroxide in plants. The underlying mechanism of its action is unknown, although it has been proposed to be S-sulfhydration. This post-translational 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...
June 1, 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
#18
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...
June 1, 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
#19
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 post-harvest natural and low-temperature-delayed senescence...
June 1, 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
#20
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...
June 1, 2017: Plant & Cell Physiology
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