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Plant, Cell & Environment

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https://www.readbyqxmd.com/read/28440563/the-sumo-e3-ligase-mdsiz1-promotes-anthocyanin-accumulation-by-sumoylating-mdmyb1-under-low-temperature-conditions-in-apple
#1
Li-Jie Zhou, Yuan-Yuan Li, Rui-Fen Zhang, Chun-Ling Zhang, Xing-Bin Xie, Cheng Zhao, Yu-Jin Hao
MdMYB1 acts as a crucial component of the MYB-bHLH-WD40 (MBW) complex to regulate anthocyanin biosynthesis in red-skinned apples (Malus domestica), but little is known about its posttranslational regulation. Here, a SUMO E3 ligase MdSIZ1 was screened out as an MdMYB1-interacting protein with a yeast two-hybridization approach. The interaction between MdSIZ1 and MdMYB1 was further verified with pull-down and CoIP assays. Furthermore, it was found that MdSIZ1 directly sumoylated MdMYB1 proteins in vivo and in vitro, especially under moderately low temperature (17 °C) conditions, and that this sumoylation was required for MdMYB1 protein stability...
April 25, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28437590/plant-dual-specificity-tyrosine-phosphorylation-regulated-kinase-optimizes-light-regulated-growth-and-development-in-arabidopsis
#2
Wen-Yu Huang, Yi-Chen Wu, Hsin-Yi Pu, Ying Wang, Geng-Jen Jang, Shu-Hsing Wu
Light controls vegetative and reproductive development of plants. For a plant, sensing the light input properly ensures coordination with the ever-changing environment. Previously, we found that LIGHT-REGULATED WD1 (LWD1) and LWD2 regulate the circadian clock and photoperiodic flowering. Here we identified Arabidopsis YET ANOTHER KINASE1 (AtYAK1), an evolutionarily conserved protein and a member of dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs), as an interacting protein of LWDs. Our study revealed that AtYAK1 is an important regulator for various light responses, including the circadian clock, photomorphogenesis and reproductive development...
April 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28436093/genome-wide-association-studies-to-identify-rice-salt-tolerance-markers
#3
Juan Patishtan, Tom N Hartley, Raquel Fonseca de Carvalho, Frans Jm Maathuis
Salinity is an ever increasing menace that affects agriculture world-wide. Crops such as rice are salt sensitive but its degree of susceptibility varies widely between cultivars pointing to extensive genetic diversity which can be exploited to identify genes and proteins that are relevant in the response of rice to salt stress. We used a diversity panel of 306 rice accessions and collected phenotypic data after short (6 h), medium (7d) and long (30d) salinity treatment (50 mM NaCl). A genome wide association study (GWAS) was subsequently performed which identified around 1200 candidate genes from many functional categories but this was treatment period dependent...
April 23, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28436078/oxygen-isotope-fractionations-across-individual-leaf-carbohydrates-in-grass-and-tree-species
#4
Marco M Lehmann, Bruno Gamarra, Ansgar Kahmen, Rolf T W Siegwolf, Matthias Saurer
Almost no δ(18) O data are available for leaf carbohydrates, leaving a gap in the understanding of the δ(18) O relationship between leaf water and cellulose. We measured δ(18) O values of bulk leaf water (δ(18) OLW ) and individual leaf carbohydrates (e.g. fructose, glucose, sucrose) in grass and tree species, and δ(18) O of leaf cellulose in grasses. The grasses were grown under two relative humidity (rH) conditions. Sucrose was generally (18) O-enriched compared to hexoses across all species with an apparent biosynthetic fractionation factor (εbio ) of more than 27‰ relative to δ(18) OLW , which might be explained by isotopic leaf water and sucrose synthesis gradients...
April 23, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28436049/elevated-carbon-dioxide-reduces-emission-of-herbivore-induced-volatiles-in-zea-mays
#5
Anna Block, Martha M Vaughan, Shawn A Christensen, Hans T Alborn, James H Tumlinson
Terpene volatiles produced by sweet corn (Zea mays) upon infestation with pests such as beet armyworm (Spodoptera exigua) function as part of an indirect defense mechanism by attracting parasitoid wasps; yet little is known about the impact of climate change on this form of plant defense. To investigate how a central component of climate change affects indirect defense, we measured herbivore induced volatile emissions in plants grown under elevated carbon dioxide (CO2 ). We found that S. exigua infested or elicitor treated Z...
April 23, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28433003/the-plastid-outer-membrane-localized-lptd1-is-important-for-glycerolipid-remodeling-under-phosphate-starvation
#6
Yi-Ching Hsueh, Christian Ehmann, Nadine Flinner, Roman Ladig, Enrico Schleiff
Glycerolipid synthesis in plants is coordinated between plastids and the endoplasmic reticulum (ER). A central step within the glycerolipid synthesis is the transport of phosphatidic acid from ER to chloroplasts. The chloroplast outer envelope protein TGD4 belongs to the LptD family conserved in bacteria and plants and selectively binds and may transports phosphatidic acid. We describe a second LptD-family protein in A. thaliana (atLPTD1; At2g44640) characterized by a barrel domain with an amino acid signature typical for cyanobacterial LptDs...
April 22, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28432768/the-fate-of-recently-fixed-carbon-after-drought-release-towards-unravelling-c-storage-regulation-in-tilia-platyphyllos-and-pinus-sylvestris
#7
Lucía Galiano Pérez, Galina Timofeeva, Matthias Saurer, Rolf Siegwolf, Jordi Martínez-Vilalta, Robert Hommel, Arthur Gessler
Carbon reserves are important for maintaining tree function during and after stress. Increasing tree mortality driven by drought globally has renewed the interest in how plants regulate allocation of recently fixed C to reserve formation. Three year-old seedlings of two species (Tilia platyphyllos, Pinus sylvestris) were exposed to two intensities of experimental drought during ~ 10 weeks and (13) C pulse labelling was subsequently applied with rewetting. Tracking the (13) C-label across different organs and C compounds (soluble sugars, starch, myo-inositol, lipids and cellulose), together with the monitoring of gas exchange and C mass balances over time, allowed for the identification of variations in C allocation priorities and tree C balances that are associated to drought effects and subsequent drought release...
April 22, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28426157/effects-of-ambient-temperature-in-association-with-photoperiod-on-phenology-and-on-the-expressions-of-major-plant-developmental-genes-in-wheat-triticum-aestivum-l
#8
Tibor Kiss, Laura E Dixon, Alexandra Soltész, Judit Bányai, Marianna Mayer, Krisztina Balla, Vincent Allard, Gábor Galiba, Gustavo A Slafer, Simon Griffiths, Ottó Veisz, Ildikó Karsai
In addition to its role in vernalization, temperature is an important environmental stimulus in determining plant growth and development. We used factorial combinations of two photoperiods (16H, 12H) and three temperature levels (11 °C, 18 °C, and 25 °C) to study the temperature responses of 19 wheat cultivars with established genetic relationships. Temperature produced more significant effects on plant development than photoperiod, with strong genotypic components. Wheat genotypes with PPD-D1 photoperiod sensitive allele were sensitive to temperature; their development was delayed by higher temperature, which intensified under non-inductive conditions...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28426140/stomatal-kinetics-and-photosynthetic-gas-exchange-along-a-continuum-of-iso-to-anisohydric-regulation-of-plant-water-status
#9
Frederick C Meinzer, Duncan D Smith, David R Woodruff, Danielle E Marias, Katherine A McCulloh, Ava R Howard, Alicia L Magedman
Species' differences in the stringency of stomatal control of plant water potential represent a continuum of iso- to anisohydric behavior. However, little is known about how quasi-steady state stomatal regulation of water potential may relate to dynamic behavior of stomata and photosynthetic gas exchange in species operating at different positions along this continuum. Here we evaluated kinetics of light-induced stomatal opening, activation of photosynthesis and features of quasi-steady state photosynthetic gas exchange in ten woody species selected to represent different degrees of anisohydry...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28425570/elongation-of-barley-roots-in-high-ph-nutrient-solution-is-supported-by-both-cell-proliferation-and-differentiation-in-the-root-apex
#10
Kyoko Higuchi, Kota Ono, Satoru Araki, Shogo Nakamura, Tetsuya Uesugi, Taira Makishima, Atsushi Ikari, Takahiro Hanaoka, Masayuki Sue
Many crops grow well on neutral or weakly acidic soils. The ability of roots to elongate under high external pH would be advantageous for the survival of plants on alkaline soil. We found that root elongation was promoted in some plant species in alkaline nutrient solution. Barley, but not tomato, root growth was maintained in pH 8 nutrient solution. Fe and Mn were absorbed well from the pH 8 nutrient solution by both barley and tomato plants, suggesting that the different growth responses of these two species may not be caused by insolubilization of transition metals...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28425127/manipulation-of-glyoxalase-pathway-confers-tolerance-to-multiple-stresses-in-rice
#11
Brijesh K Gupta, Khirod K Sahoo, Ajit Ghosh, Amit K Tripathi, Khalid Anwar, Priyanka Das, Anil K Singh, Ashwani Pareek, Sudhir K Sopory, Sneh L Singla-Pareek
Crop plants face a multitude of diverse abiotic and biotic stresses in the farmers' fields. Although there now exists a considerable knowledge of the underlying mechanisms of response to individual stresses, the cross-talk between response pathways to various abiotic and biotic stresses remains enigmatic. Here, we investigated if the cytotoxic metabolite methylglyoxal (MG), excess of which is generated as a common consequence of many abiotic and biotic stresses, may serve as a key molecule linking responses to diverse stresses...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28418069/genetic-control-of-plasticity-of-oil-yield-for-combined-abiotic-stresses-using-a-joint-approach-of-crop-modeling-and-genome-wide-association
#12
Brigitte Mangin, Pierre Casadebaig, Eléna Cadic, Nicolas Blanchet, Marie-Claude Boniface, Sébastien Carrère, Jérôme Gouzy, Ludovic Legrand, Baptiste Mayjonade, Nicolas Pouilly, Thierry André, Marie Coque, Joël Piquemal, Marion Laporte, Patrick Vincourt, Stéphane Muños, Nicolas B Langlade
Understanding the genetic basis of phenotypic plasticity is crucial for predicting and managing climate change effects on wild plants and crops. Here, we combined crop modeling and quantitative genetics to study the genetic control of oil yield plasticity for multiple abiotic stresses in sunflower. First we developed stress indicators to characterize 14 environments for three abiotic stresses (cold, drought and nitrogen) using the SUNFLO crop model and phenotypic variations of three commercial varieties. The computed plant stress indicators better explain yield variation than descriptors at the climatic or crop levels...
April 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28386947/the-potential-of-genetic-engineering-of-plants-for-the-remediation-of-soils-contaminated-with-heavy-metals
#13
REVIEW
Elisa Fasani, Anna Manara, Flavio Martini, Antonella Furini, Giovanni DalCorso
The genetic engineering of plants to facilitate the reclamation of soils and waters contaminated with inorganic pollutants is a relatively new and evolving field, benefiting from the heterologous expression of genes that increase the capacity of plants to mobilize, stabilize and/or accumulate metals. The efficiency of phytoremediation relies on the mechanisms underlying metal accumulation and tolerance, such as metal uptake, translocation and detoxification. The transfer of genes involved in any of these processes into fast-growing, high-biomass crops may improve their reclamation potential...
April 7, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28386931/subfunctionalization-of-duplicate-myb-genes-in-solanum-commersonii-generated-the-cold-induced-scan2-and-the-anthocyanin-regulator-scan1
#14
Vincenzo D'Amelia, Riccardo Aversano, Alessandra Ruggiero, Giorgia Batelli, Ingo Appelhagen, Claudio Dinacci, Lionel Hill, Cathie Martin, Domenico Carputo
Wild potato species are useful sources allelic diversity and loci lacking in the cultivated potato. In these species, the presence of anthocyanins in leaves has been associated with a greater tolerance to cold stress. However, the molecular mechanisms that allow potatoes to withstand cold exposure remain unclear. Here, we show that the expression of AN2, a MYB transcription factor, is induced by low temperatures in wild, cold tolerant Solanum commersonii, and not in susceptible S. tuberosum varieties. We found that AN2 is a paralog of the potato anthocyanin regulator AN1, showing similar interaction ability with bHLH co-partners...
April 7, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28382767/safety-conscious-or-living-dangerously-what-is-the-right-level-of-plant-photoprotection-for-fitness-and-productivity
#15
Erik Murchie
No abstract text is available yet for this article.
April 6, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28382683/increased-light-use-efficiency-sustains-net-primary-productivity-of-shaded-coffee-plants-in-agroforestry-system
#16
Fabien Charbonnier, Olivier Roupsard, Guerric le Maire, Joannès Guillemot, Fernando Casanoves, André Lacointe, Philippe Vaast, Clémentine Allinne, Louise Audebert, Aurélie Cambou, Anne Clément-Vidal, Elsa Defrenet, Remko A Duursma, Laura Jarri, Christophe Jourdan, Emmanuelle Khac, Patricia Leandro, Belinda E Medlyn, Laurent Saint-André, Philippe Thaler, Karel Van den Meersche, Alejandra Barquero Aguilar, Peter Lehner, Erwin Dreyer
In agroforestry systems, shade trees strongly affect the physiology of the undergrown crop. However, a major paradigm is that the reduction in absorbed photosynthetically active radiation is, to a certain extent, compensated by an increase in light-use efficiency, thereby reducing the difference in net primary productivity between shaded and non-shaded plants. Due to the large spatial heterogeneity in agroforestry systems and the lack of appropriate tools, the combined effects of such variables have seldom been analysed, even though they may help understand physiological processes underlying yield dynamics...
April 6, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28382635/leaf-water-storage-increases-with-salinity-and-aridity-in-the-mangrove-avicennia-marina-integration-of-leaf-structure-osmotic-adjustment-and-access-to-multiple-water-sources
#17
Hoa T Nguyen, Patrick Meir, Lawren Sack, John R Evans, Rafael S Oliveira, Marilyn C Ball
Leaf structure and water relations were studied in a temperate population of Avicennia marina subsp. australasica along a natural salinity gradient (28 to 49 parts per thousand (ppt)) and compared with two subspecies grown naturally in similar soil salinities to those of subsp. australasica but under different climates: subsp. eucalyptifolia (salinity 30 ppt, wet tropics) and subsp. marina (salinity 46 ppt, arid tropics). Leaf thickness, leaf dry mass per area, and water content increased with salinity and aridity...
April 5, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28369975/the-redox-state-of-the-apoplast-influences-the-acclimation-of-photosynthesis-and-leaf-metabolism-to-changing-irradiance
#18
Barbara Karpinska, Kaiming Zhang, Brwa Rasool, Daria Pastok, Jenny Morris, Susan R Verrall, Pete E Hedley, Robert D Hancock, Christine H Foyer
The redox state of the apoplast is largely determined by ascorbate oxidase (AO) activity. The influence of AO activity on leaf acclimation to changing irradiance was explored in wild type (WT) and transgenic tobacco (Nicotiana tobaccum) lines containing either high (PAO) or low (TAO) AO activity at low (LL; 250 µmol m(-2) s(-1) ) and high (HL; 1600 µmol m(-2) s(-1) ) irradiance and following the transition from HL to LL. AO activities changed over the photoperiod, particularly in the PAO plants. AO activity had little effect on leaf ascorbate, which was significantly higher under HL than LL...
April 1, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28370170/genome-wide-association-mapping-for-phenotypic-plasticity-in-rice
#19
Shinji Kikuchi, Raju Bheemanahalli, Krishna S V Jagadish, Etsushi Kumagai, Yusuke Masuya, Eiki Kuroda, Chitra Raghavan, Michael Dingkuhn, Akira Abe, Hiroyuki Shimono
Phenotypic plasticity of plants in response to environmental changes is important for adapting to changing climate. Less attention has been paid to exploring the advantages of phenotypic plasticity in resource-rich environments to enhance the productivity of agricultural crops. Here, we examined genetic variation in phenotypic plasticity in indica rice (Oryza sativa L.) across two diverse panels: (i) a Phenomics of Rice Adaptation and Yield (PRAY) population comprising 301 accessions and (ii) a Multi-parent-Advanced-Generation-Inter-Cross (MAGIC) indica population comprising 151 accessions...
March 31, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28370204/heat-shock-factor-c2a-serves-as-a-proactive-mechanism-for-heat-protection-in-developing-grains-in-wheat-via-an-aba-mediated-regulatory-pathway
#20
Xiao-Jun Hu, Dandan Chen, C Lynne Mclntyre, M Fernanda Dreccer, Zheng-Bin Zhang, Janneke Drenth, Kalaipandian Sundaravelpandian, Hongping Chang, Gang-Ping Xue
High temperature at grain filling can severely reduce wheat yield. Heat shock factors (Hsfs) are central regulators in heat acclimation. This study investigated the role of TaHsfC2a, a member of the monocot-specific HsfC2 subclass, in the regulation of heat protection genes in Triticum aestivum. Three TaHsfC2a homoeologous genes were highly expressed in wheat grains during grain filling and showed only transient upregulation in the leaves by heat stress, but were markedly upregulated by drought and abscisic acid (ABA) treatment...
March 30, 2017: Plant, Cell & Environment
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