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Plant, Cell & Environment

Sean M Gleason
No abstract text is available yet for this article.
May 21, 2018: Plant, Cell & Environment
Dora L Cano-Ramirez, Antony N Dodd
No abstract text is available yet for this article.
May 21, 2018: Plant, Cell & Environment
Andrew A Almonte, Justin O Borevitz
No abstract text is available yet for this article.
May 19, 2018: Plant, Cell & Environment
C Robertson McClung
No abstract text is available yet for this article.
May 18, 2018: Plant, Cell & Environment
Youngjoo Oh, Variluska Fragoso, Francesco Guzzonato, Sang-Gyu Kim, Chung-Mo Park, Ian T Baldwin
While photoreceptors are expressed throughout all plant organs, most studies have focused on their function in aerial parts with laboratory-grown plants. Photoreceptor function in naturally dark-grown roots of plants in their native habitats are lacking. We characterized patterns of photoreceptor expression in field- and glasshouse-grown Nicotiana attenuata plants, silenced the expression of PhyB1/B2/A/Cry2 whose root transcripts levels were greater/equal to those of shoots, and by micrografting combined empty vector transformed shoots onto photoreceptor-silenced roots, creating chimeric plants with "blind" roots but "sighted" shoots...
May 15, 2018: Plant, Cell & Environment
Àngela Manrique-Alba, Sanna Sevanto, Henry D Adams, Adam D Collins, Lee T Dickman, Esteban Chirino, Juan Bellot, Nate G McDowell
We investigated stem radial growth and water storage dynamics of two conifer species differing in hydraulic-carbon strategies, Juniperus monosperma and Pinus edulis, under conditions of ambient, drought (∼45% reduction in precipitation), heat (∼4.8 °C temperature increase) and the combination of drought+heat, in 2013 and 2014. Juniper maintained low growth across all treatments. Overall, the relatively isohydric piñon pine showed significantly greater growth and water storage recharge than the relatively anisohydric juniper across all treatments in the average climate year (2014) but no differences in the regionally dry year (2013)...
May 15, 2018: Plant, Cell & Environment
Huihui Bi, Jianxin Shi, Natalia Kovalchuk, Sukanya Luang, Natalia Bazanova, Larissa Chirkova, Dabing Zhang, Yuri Shavrukov, Anton Stepanenko, Penny Tricker, Peter Langridge, Maria Hrmova, Sergiy Lopato, Nikolai Borisjuk
Transcription factors regulate multiple networks, mediating the responses of organisms to stresses, including drought. Here we investigated the role of the wheat transcription factor TaSHN1 in crop growth and drought tolerance. TaSHN1, isolated from bread wheat, was characterised for molecular interactions and functionality. The overexpression of TaSHN1 in wheat was followed by the evaluation of T2 and T3 transgenic lines for drought tolerance, growth and yield components. Leaf surface changes were analysed by light microscopy, SEM, TEM and GC-MS/GC-FID...
May 14, 2018: Plant, Cell & Environment
Md Shahin Uz Zaman, Al Imran Malik, William Erskine, Parwinder Kaur
Waterlogging causes germination failure in pea (Pisum sativum L.). Three genotypes (BM-3, NL-2 and Kaspa) contrasting in ability to germinate in waterlogged soil were exposed to different durations of waterlogging. Whole genome RNAseq was employed to capture differentially expressing genes. The ability to germinate in waterlogged soil was associated with testa colour and testa membrane integrity as confirmed by electrical conductivity measurements. Genotypes Kaspa and NL-2 displayed different mechanisms of tolerance...
May 14, 2018: Plant, Cell & Environment
Andrea Pagano, Susana de Sousa Araújo, Anca Macovei, Daniele Dondi, Simone Lazzaroni, Alma Balestrazzi
Since high-quality seeds are essential for successful crop production in challenging environments, understanding the molecular bases of seed vigor will lead to advances in seed technology. Histone deacetylase (HDAC) inhibitors, promoting histone hyperacetylation, are used as tools to explore aspects still uncovered of the abiotic stress response in plants. The aim of this work was to investigate novel signatures of seed germination in Medicago truncatula, using the HDAC inhibitor sodium butyrate (NaB) as stress agent...
May 14, 2018: Plant, Cell & Environment
Amélie Saunier, Elena Ormeño, Michel Havaux, Henri Wortham, Brigitte Ksas, Brice Temime-Roussel, James D Blande, Caroline Lecareux, Jean-Philippe Mévy, Anne Bousquet-Mélou, Thierry Gauquelin, Catherine Fernandez
The capacity of a Quercus pubescens forest to resist recurrent drought was assessed on an in situ experimental platform through the measurement of a large set of traits (ecophysiological and metabolic) studied under natural drought (ND) and amplified drought induced by partial rain exclusion (AD). This study was performed during the 3rd and 4th years of AD, which correspond to conditions of moderate AD in 2014 and harsher AD in 2015, respectively. Although water potential (Ψ) and net photosynthesis (Pn) were noticeably reduced under AD in 2015 compared to ND, trees showed similar growth and no oxidative stress...
May 10, 2018: Plant, Cell & Environment
Silvas J Prince, Babu Valliyodan, Heng Ye, Ming Yang, Shuaishuai Tai, Wushu Hu, Mackensie Murphy, Lorellin A Durnell, Li Song, Trupti Joshi, Yang Liu, Jan Van de Velde, Klaas Vandepoele, J Grover Shannon, Henry T Nguyen
Developing crops with better root systems is a promising strategy to ensure productivity in both optimum and stress environments. Root system architectural (RSA) traits in 397 soybean accessions were characterized and a high-density single nucleotide polymorphisms (SNP) based genome-wide association study was performed to identify the underlying genes associated with root structure. SNPs associated with root architectural traits specific to landraces and elite germplasm pools were detected. Four loci were detected in landraces for lateral root number (LRN) and distribution of root thickness in diameter class I with a major locus on chromosome 16...
May 10, 2018: Plant, Cell & Environment
Vivek Dogra, Jean-David Rochaix, Chanhong Kim
Singlet oxygen (1 O2 ) is a prime cause of photodamage of the photosynthetic apparatus. The chlorophyll molecules in the photosystem II reaction center (PSII RC) and in the light-harvesting antenna complex (LHC) are major sources of 1 O2 generation. It has been thought that the generation of 1 O2 mainly takes place in the appressed regions of the thylakoid membranes, namely the grana core, where most of the active PSII complexes are localized. Apart from being a toxic molecule, new evidence suggests that 1 O2 significantly contributes to chloroplast-to-nucleus retrograde signaling that primes acclimation and cell death responses...
May 10, 2018: Plant, Cell & Environment
Pragya Barua, Nilesh Vikram Lande, Pratigya Subba, Dipak Gayen, Sneha Pinto, T S Keshav Prasad, Subhra Chakraborty, Niranjan Chakraborty
Non-availability of water or dehydration remains recurring climatic disorder affecting yield of major food crops, legumes in particular. Nuclear proteins (NP) and phosphoproteins (NPPs) execute crucial cellular functions that form the regulatory hub for coordinated stress response. Phosphoproteins hold enormous influence over cellular signalling. Four-week-old seedlings of a grain legume, chickpea, were subjected to gradual dehydration and nuclear proteins were extracted from unstressed control as well as from 72 and 144 h stressed tissues...
May 10, 2018: Plant, Cell & Environment
Amanda A Cardoso, Timothy J Brodribb, Christopher J Lucani, Fábio M DaMatta, Scott A M McAdam
The air-seeding threshold water potential establishes a hydraulic limit on the ability of woody species to survive in water-limiting environments, but herbs may be more plastic in terms of their ability to adapt to drying conditions. Here we examined the capacity of sunflower (Helianthus annuus L.) leaves to adapt to reduced water availability by modifying the sensitivity of xylem and stomata to soil water deficit. We found that sunflower plants grown under water-limited conditions significantly adjusted leaf osmotic potential, which was linked to a prolongation of stomatal opening as soil dried and a reduced sensitivity of photosynthesis to water-stress induced damage...
May 10, 2018: Plant, Cell & Environment
Xiaojun Kang, Gang Xu, Byungha Lee, Chen Chen, Huanan Zhang, Rui Kuang, Min Ni
Blue light triggers the opening of stomata in the morning to allow CO2 uptake and water loss through transpiration. During the day, plants may experience periodic drought and accumulate abscisic acid (ABA). ABA antagonizes blue light signaling through phosphatidic acid and reduces stomatal aperture. This study reveals a molecular mechanism by which two light signaling proteins interact to repress ABA signaling in the control of stomatal aperture. A hypersensitive to red and blue 2 (hrb2) mutant has a defective ATP-dependent chromatin-remodeling factor, PKL, in the chromodomain/helicase/DNA binding family...
May 10, 2018: Plant, Cell & Environment
Dorothee Wozny, Katharina Kramer, Iris Finkemeier, Ivan F Acosta, Maarten Koornneef
Genes controlling differences in seed longevity between two barley (Hordeum vulgare) accessions were identified by combining quantitative genetics 'omics' technologies in Near Isogenic Lines (NILs). The NILs were derived from crosses between the spring barley landraces L94 from Ethiopia and Cebada Capa from Argentina. A combined transcriptome and proteome analysis on mature, non-aged seeds of the two parental lines and the L94 NILs by RNA-sequencing and total seed proteomic profiling identified the UDP-glycosyltransferase MLOC_11661...
May 9, 2018: Plant, Cell & Environment
Helena Janečková, Alexandra Husičková, Ursula Ferretti, Maroš Prčina, Eva Pilařová, Lenka Plačková, Pavel Pospíšil, Karel Doležal, Martina Špundová
Light and cytokinins are known to be the key players in the regulation of plant senescence. In detached leaves, the retarding effect of light on senescence is well described; however, it is not clear to what extent is this effect connected with changes in endogenous cytokinin levels. We have performed a detailed analysis of changes in endogenous content of 29 cytokinin forms in detached leaves of Arabidopsis thaliana (wild-type and three cytokinin receptor double-mutants). Leaves were kept under different light conditions and changes in cytokinin content were correlated with changes in chlorophyll content, efficiency of photosystem II photochemistry and lipid peroxidation...
May 9, 2018: Plant, Cell & Environment
Akanksha Sehgal, Kumari Sita, Kalpna Bhandari, Shiv Kumar, Jitendra Kumar, P V Vara Prasad, Kadambot H M Siddique, Harsh Nayyar
Terminal droughts, along with high temperatures, are becoming more frequent to strongly influence the seed development in cool-season pulses like lentil. In the present study, the lentil plants, growing outdoors under natural environment were subjected to following treatments at the time of seed filling till maturity (a): 28/23°C; day/night temperature as controls. (b): drought-stressed; plants maintained at 50% field capacity, under the same growth conditions as in (a). (c): heat-stressed; 33/28°C; day/night temperature, under the same growth conditions as in (a)...
May 9, 2018: Plant, Cell & Environment
Nuria Fernández-Bautista, Lourdes Fernández-Calvino, Alfonso Muñoz, René Toribio, Hans P Mock, M Mar Castellano
HOP is a family of cytosolic cochaperones whose molecular role in thermotolerance is quite unknown in eukaryotes and unexplored in plants. In this article, we describe that the three members of the AtHOP family display a different induction pattern under heat, being HOP3 highly regulated during the challenge and the attenuation period. Despite HOP3 is the most heat-regulated member, the analysis of the hop1 hop2 hop3 triple mutant demonstrates that the three HOP proteins act redundantly to promote long term acquired thermotolerance in Arabidopsis...
May 8, 2018: Plant, Cell & Environment
Paula Guzmán-Delgado, J Mason Earles, Maciej A Zwieniecki
Soil water transported via the petiole is a primary rehydration pathway for leaves of water stressed plants. Leaves may also rehydrate by absorbing water via their epidermal surfaces. The mechanisms and physiological relevance of this water pathway, however, remain unclear, as the associated hydraulic properties are unknown. To gain insight into the foliar water absorption process, we compared rehydration kinetics via the petiole and surface of Prunus dulcis and Quercus lobata leaves. Petiole rehydration could be described by a double exponential function suggesting that two partly isolated water pools exist in leaves of both species...
May 8, 2018: Plant, Cell & Environment
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