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Plant, Cell & Environment

Pascale Satour, Chvan Youssef, Emilie Châtelain, Benoit Ly Vu, Béatrice Teulat, Claudette Job, Dominique Job, Françoise Montrichard
Seeds mainly acquire their physiological quality during maturation while oxidative conditions reign within cells triggering protein carbonylation. To better understand the role of this protein modification in legume seeds, we compared by proteomics patterns of carbonylated proteins in maturing seeds of Medicago truncatula naturally desiccated or prematurely dried, a treatment known to impair seed quality acquisition. In both cases, protein carbonylation increased in these seeds, accompanying water removal. We identified several proteins whose extent of carbonylation varied when comparing natural desiccation and premature drying and that could therefore be responsible for the impairment of seed quality acquisition or expression...
March 15, 2018: Plant, Cell & Environment
Jenny A Wood, Hwei-Ting Tan, Helen M Collins, Kuok Yap, Shi Khor, Wai Li Lim, Xiaohui Xing, Vincent Bulone, Rachel A Burton, Geoffrey B Fincher, Matthew R Tucker
Chickpea (Cicer arietinum L.) is an important nutritionally-rich legume crop that is consumed worldwide. Prior to cooking, desi chickpea seeds are most often cleaved to release the split cotyledons, referred to as dhal. Compositional variation between desi genotypes has a significant impact on nutritional quality and downstream processing, and this has been investigated mainly in terms of starch and protein content. Studies in pulses such as bean and lupin have also implicated cell wall polysaccharides in cooking time variation, but the underlying relationship between desi chickpea cotyledon composition and cooking performance remains unclear...
March 13, 2018: Plant, Cell & Environment
Naeem Khan, Asghari Bano, Mohammad Atikur Rahman, Bala Rathinasabapathi, Md Ali Babar
Genetic improvement for drought tolerance in chickpea requires a solid understanding of biochemical processes involved with different physiological mechanisms. The objective of this study is to demonstrate genetic variations in altered metabolic levels in chickpea varieties (tolerant and sensitive) grown under contrasting water regimes through UPLC-HRMS based untargeted metabolomic profiling. Chickpea plants were exposed to drought stress at the three-leaf stage for 25 days and the leaves were harvested at 14 days and 25 days after the imposition of drought stress...
March 13, 2018: Plant, Cell & Environment
Allan B James, Cristiane P G Calixto, Nikoleta A Tzioutziou, Wenbin Guo, Runxuan Zhang, Craig G Simpson, Wenying Jiang, Gillian A Nimmo, John W S Brown, Hugh G Nimmo
One of the ways in which plants can respond to temperature is via alternative splicing (AS). Previous work showed that temperature changes affected the splicing of several circadian clock gene transcripts. Here we investigated the role of RNA-binding splicing factors (SFs) in temperature-sensitive alternative splicing (AS) of the clock gene LATE ELONGATED HYPOCOTYL (LHY). We characterised, in wild type plants, temperature-associated isoform switching and expression patterns for SF transcripts from a high-resolution temperature and time series RNA-seq experiment...
March 13, 2018: Plant, Cell & Environment
D M S B Dissanayaka, William C Plaxton, Hans Lambers, Meike Siebers, Buddhi Marambe, Jun Wasaki
Orthophosphate (H2 PO4 - , Pi) is an essential macronutrient integral to energy metabolism as well as a component of membrane lipids, nucleic acids, including ribosomal RNA, and therefore essential for protein synthesis. The Pi concentration in the solution of most soils worldwide is usually far too low for maximum growth of crops, including rice. This has prompted the massive use of inefficient, polluting, and non-renewable phosphorus (P) fertilizers in agriculture. We need alternative and more sustainable approaches urgently to decrease complete dependence on Pi fertilizers in agriculture...
March 8, 2018: Plant, Cell & Environment
Mather A Khan, Norma A Castro-Guerrero, Samuel A McInturf, Nga T Nguyen, Ashley N Dame, Jiaojiao Wang, Rebecca K Bindbeutel, Trupti Joshi, Silvia S Jurisson, Dmitri A Nusinow, David G Mendoza-Cozatl
The OLIGOPEPTIDE TRANSPORTER 3 (OPT3) has recently been identified as a component of the systemic network mediating iron (Fe) deficiency responses in Arabidopsis. Reduced expression of OPT3 induces an over accumulation of Fe in roots and leaves, due in part by an elevated expression of the IRON-REGULATED TRANSPORTER 1 (IRT1). Here we show however, that opt3 leaves display a transcriptional program consistent with an Fe overload, suggesting that Fe excess is properly sensed in opt3 leaves and that the OPT3-mediated shoot-to-root signaling is critical to prevent a systemic Fe overload...
March 8, 2018: Plant, Cell & Environment
Kieron D Edwards, Naoki Takata, Mikael Johansson, Manuela Jurca, Ondřej Novák, Eva Hényková, Silvia Liverani, Iwanka Kozarewa, Miroslav Strnad, Andrew J Millar, Karin Ljung, Maria E Eriksson
Trees are carbon dioxide sinks and major producers of terrestrial biomass with distinct seasonal growth patterns. Circadian clocks enable the co-ordination of physiological and biochemical temporal activities, optimally regulating multiple traits including growth. To dissect the clock's role in growth, we analysed Populus tremula × P. tremuloides trees with impaired clock function due to down-regulation of central clock components. late elongated hypocotyl (lhy-10) trees, in which expression of LHY1 and LHY2 is reduced by RNAi, have a short free-running period and show disrupted temporal regulation of gene expression and reduced growth, producing 30-40% less biomass than wild-type trees...
March 8, 2018: Plant, Cell & Environment
Heng Ye, Li Song, Huatao Chen, Babu Valliyodan, Liakat Ali, Tri Vuong, Chengjun Wu, John Orlowski, Blair Buckley, Pengyin Chen, J Grover Shannon, Henry T Nguyen
Natural genetic variations in waterlogging tolerance are controlled by multiple genes mapped as quantitative trait loci (QTL) in major crops, including soybean (Glycine max L.). In this research, two novel QTL associated with waterlogging tolerance were mapped from an elite/exotic soybean cross. The subsequent research was focused on a major QTL (qWT_Gm03) with the tolerant allele from the exotic parent. This QTL was isolated into near-isogenic backgrounds and its effects on waterlogging tolerance were validated in multiple environments...
March 8, 2018: Plant, Cell & Environment
Daniel Tabas-Madrid, Belén Méndez-Vigo, Noelia Arteaga, Arnald Marcer, Alberto Pascual-Montano, Detlef Weigel, F Xavier Picó, Carlos Alonso-Blanco
Current global change is fueling an interest to understand the genetic and molecular mechanisms of plant adaptation to climate. In particular, altered flowering time is a common strategy for escape from unfavorable climate temperature. In order to determine the genomic bases underlying flowering time adaptation to this climatic factor, we have systematically analysed a collection of 174 highly diverse A. thaliana accessions from the Iberian Peninsula. Analyses of 1.88 million SNPs provide evidence for a spatially heterogeneous contribution of demographic and adaptive processes to geographic patterns of genetic variation...
March 8, 2018: Plant, Cell & Environment
Allan B James, Stuart Sullivan, Hugh G Nimmo
How plants perceive and respond to temperature remains an important question in the plant sciences. Temperature perception and signal transduction may occur through temperature-sensitive intra-molecular folding of primary mRNA transcripts. Recent studies suggested a role for retention of the first intron in the 5'UTR of the clock component LATE ELONGATED HYPOCOTYL (LHY) in response to changes in temperature. Here we identified a set of haplotypes in the LHY 5'UTR, examined their global spatial distribution and obtained evidence that haplotype can affect temperature-dependent splicing of LHY transcripts...
March 8, 2018: Plant, Cell & Environment
Ülo Niinemets
No abstract text is available yet for this article.
March 6, 2018: Plant, Cell & Environment
Elina Oksanen
No abstract text is available yet for this article.
March 6, 2018: Plant, Cell & Environment
Ailin Liu, Zhixia Xiao, Man-Wah Li, Fuk-Ling Wong, Wai-Shing Yung, Yee-Shan Ku, Qianwen Wang, Xin Wang, Min Xie, Aldrin Kay-Yuen Yim, Ting-Fung Chan, Hon-Ming Lam
To obtain a comprehensive understanding of transcriptomic reprogramming under salt stress, we performed whole-transcriptome sequencing on the leaf and root of soybean seedlings subjected to salt treatment in a time-course experiment (0h, 1h, 2h, 4 h, 24h and 48h). This time series dataset enabled us to identify important hubs and connections of gene expressions. We highlighted the analysis on phytohormone signaling pathways and their possible cross-talks. Differential expressions were also found among those genes involved in carbon and nitrogen metabolism...
March 6, 2018: Plant, Cell & Environment
Yovanny Izquierdo, Satish Kulasekaran, Pablo Benito, Bran López, Ruth Marcos, Tomás Cascón, Mats Hamberg, Carmen Castresana
Stress adaptation and translational regulation was studied using noxy7 (non-responding to oxylipins7) from a series of Arabidopsis thaliana mutants. We identified the noxy7 mutation in At1g64790, which encodes a homolog of the yeast translational regulator GENERAL CONTROL NON-DEREPRESSIBLE1 (GCN1) that activates the GCN2 kinase; GCN2 in turn phosphorylates the α subunit of the translation initiation factor eIF2. This regulatory circuit is conserved in yeast and mammals, in which phosphorylated eIF2α (P-eIF2α) facilitates stress adaptation by inhibiting protein synthesis...
March 2, 2018: Plant, Cell & Environment
Rabia Ghaffar, Marieluise Weidinger, Barbara Mähnert, Michael Schagerl, Irene Lichtscheidl
Deep-shade plants have adapted to low-light conditions by varying morphology and physiology of cells and chloroplasts, but it still remains unclear, if prolonged periods of high-light or darkness induce additional modifications in chloroplasts' anatomy and pigment patterns. We studied giant chloroplasts (bizonoplasts) of the deep-shade lycopod Selaginella erythropus in epidermal cells of mature fully developed microphylls and subjected them to prolonged darkness and high-light conditions. Chloroplast size and ultrastructure were investigated by light and electron microscopy...
March 2, 2018: Plant, Cell & Environment
Abdul Wakeel, Imran Ali, Sakila Upreti, Aziz Ullah, Bohan Liu, Ali Raza Khan, Linli Huang, Minjie Wu, Yinbo Gan
The hexavalent form of chromium [Cr(VI)], causes a major reduction in yield and quality of crops worldwide. The root is the first plant organ that interacts with Cr(VI) toxicity, which inhibits primary root elongation, but the underlying mechanisms of this inhibition remain elusive. In the current study, we investigate the possibility that Cr(VI) reduces primary root growth of Arabidopsis by modulating the cell cycle-related genes and that ethylene signaling contributes to this process. We show that Cr(VI) mediated inhibition of primary root elongation was alleviated by the ethylene perception and biosynthesis antagonists silver (Ag) and cobalt (Co) respectively...
March 2, 2018: Plant, Cell & Environment
Karolina Sakowska, Giorgio Alberti, Lorenzo Genesio, Alessandro Peressotti, Gemini Delle Vedove, Damiano Gianelle, Roberto Colombo, Mirco Rodeghiero, Cinzia Panigada, Radosław Juszczak, Marco Celesti, Micol Rossini, Matthew Haworth, Benjamin W Campbell, Jean-Philippe Mevy, Loris Vescovo, M Pilar Cendrero-Mateo, Uwe Rascher, Franco Miglietta
The photosynthetic, optical and morphological characteristics of a chlorophyll-deficient (Chl-deficient) "yellow" soybean mutant (MinnGold) were examined in comparison with two green varieties (MN0095 and Eiko). Despite the large difference in Chl content, similar leaf photosynthesis rates were maintained in the Chl-deficient mutant by offsetting the reduced absorption of red photons by a small increase in photochemical efficiency and lower non-photochemical quenching (NPQ). When grown in the field, at full canopy cover, the mutants reflected a significantly larger proportion of incoming shortwave radiation, but the total canopy light absorption was only slightly reduced, most likely due to a deeper penetration of light into the canopy space...
March 2, 2018: Plant, Cell & Environment
Kamal Kumar, Savithri Purayannur, Vemula Chandra Kaladhar, Swarup Kumar Parida, Praveen Kumar Verma
Ascochyta blight (AB) caused by the fungal pathogen Ascochyta rabiei is a serious foliar disease of chickpea (Cicer arietinum L.). Despite many genetic studies on chickpea-Ascochyta interaction, genome-wide scan of chickpea for the identification of AB associated quantitative trait loci (QTLs) and their gene(s) has not been accomplished. To elucidate narrow QTLs for AB resistance, here we report the use of multiple QTL-sequencing (mQTL-seq) approach on two sets of extreme AB phenotype bulks derived from Cicer intraspecific and interspecific crosses...
March 1, 2018: Plant, Cell & Environment
Qi Zhaoming, Zhang Zhanguo, Wang Zhongyu, Yu Jingyao, Qin Hongtao, Mao Xinrui, Jiang Hongwei, Xin Dawei, Yin Zhengong, Zhu Rongsheng, Liu Chunyan, Wei Yu, Hu Zhenbang, Wu Xiaoxia, Liu Jun, Chen Qingshan
Soybean is an important crop providing edible oil and protein source. Soybean oil and protein contents are quantitatively inherited and significantly affected by environmental factors. In this study, meta-analysis was conducted based on soybean physical maps to integrate QTLs from multiple experiments in different environments. Meta-QTLs for seed oil, fatty acid composition and protein were identified. Of them, 11 meta-QTLs were located on hot regions for both seed oil and protein. Next, we selected 4 chromosome segment substitution lines with different seed oil and protein contents to characterize their three years of phenotype selection in the field...
February 27, 2018: Plant, Cell & Environment
Blanca Velasco-Arroyo, Mercedes Diaz-Mendoza, Andrea Gomez-Sanchez, Beatriz Moreno-Garcia, Maria Estrella Santamaria, Miguel Torija-Bonilla, Goetz Hensel, Jochen Kumlehn, Manuel Martinez, Isabel Diaz
Protein breakdown and mobilization are some of the major metabolic features associated with abiotic stresses, essential for nutrient recycling and plant survival. Genetic manipulation of protease and/or protease inhibitors may contribute to modulate proteolytic processes and plant responses. The expression analysis of the whole cystatin family, inhibitors of C1A cysteine proteases, after water deprivation in barley leaves highlighted the involvement of Icy2 and Icy4 cystatin genes. Artificial microRNA lines independently silencing the two drought-induced cystatins were generated to assess their function in planta...
February 27, 2018: Plant, Cell & Environment
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