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Plant, Cell & Environment

Heng Zhou, Iris Finkemeier, Wenxue Guan, Maria-Armineh Tossounian, Bo Wei, David Young, Jingjing Huang, Joris Messens, Xibin Yang, Jun Zhu, Michael H Wilson, Wenbiao Shen, Yanjie Xie, Christine H Foyer
Protein lysine acylations, such as succinylation and acetylation are important posttranslational modification (PTM) mechanisms, with key roles in cellular regulation. Antibody-based affinity enrichment, high-resolution LC-MS/MS analysis and integrated bioinformatics analysis were used to characterize the lysine succinylome (Ksuc ) and acetylome (Kace ) of rice leaves. In total, 2593 succinylated and 1024 acetylated proteins were identified, of which 723 were simultaneously acetylated and succinylated. Proteins involved in photosynthetic carbon metabolism such as the large and small subunits of RuBisCO, ribosomal functions and other key processes were subject to both PTMs...
November 10, 2017: Plant, Cell & Environment
Mickey P Jarvi, Andrew J Burton
We investigated the occurrence of and mechanisms responsible for acclimation of fine-root respiration of mature sugar maple (Acer saccharum) after 3+ years of experimental soil warming (+4 to 5 (o) C) in a factorial combination with soil moisture addition. Potential mechanisms for thermal respiratory acclimation included changes in enzymatic capacity, as indicated by root N concentration; substrate limitation, assessed by examining non-structural carbohydrates and effects of exogenous sugar additions; and adenylate control, examined as responses of root respiration to a respiratory uncoupling agent (CCCP)...
November 9, 2017: Plant, Cell & Environment
Roger S Seymour, Kikukatsu Ito, Yui Umekawa
The respiration rate of the thermogenic inflorescences of Japanese skunk cabbage Symplocarpus renifolius can reach 300 nmol s(-1) g(-1) , which is sufficient to raise spadix temperature (Ts ) up to 15°C above ambient air temperature (Ta ). Respiration rate is inversely related to Ta , such that the Ts achieves a degree of independence from Ta , an effect known as temperature regulation. Here, we measure oxygen consumption rate (M. o2 ) in air (21% O2 in mainly N2 ) and in heliox (21% O2 in He) to investigate the diffusive conductance of the network of gas-filled spaces and the thermoregulatory response...
November 9, 2017: Plant, Cell & Environment
Lihong Xiao, Abou Yobi, Karen L Koster, Yikun He, Melvin J Oliver
The moss Physcomitrella patens, a model system for basal land plants, tolerates several abiotic stresses, including dehydration. We previously reported that Physcomitrella patens survives equilibrium dehydration to -13 MPa in a closed system at 91% RH. Tolerance of desiccation to water potentials below -100 MPa was only achieved by pre-treatment with exogenous ABA. We report here that gametophores, but not protonemata, can survive desiccation below -100 MPa after a gradual drying regime in an open system, without exogenous ABA...
November 6, 2017: Plant, Cell & Environment
Anna M Locke, Gregory A Barding, Sumukh Sathnur, Cynthia K Larive, Julia Bailey-Serres
The rice (Oryza sativa L.) ethylene-responsive transcription factor gene SUB1A-1 confers tolerance to prolonged, complete submergence by limiting underwater elongation growth. Upon desubmergence, SUB1A-1 genotypes rapidly recover photosynthetic function and re-commence development towards flowering. The underpinnings of the transition from stress amelioration to the return to homeostasis are not well known. Here, transcriptomic and metabolomic analyses were conducted to identify mechanisms by which SUB1A improves physiological function over the 24 hours following a sub-lethal submergence event...
November 2, 2017: Plant, Cell & Environment
Caroline Bournaud, Euan K James, Sergio M de Faria, Michel Lebrun, Rémy Melkonian, Robin Duponnois, Pierre Tisseyre, Lionel Moulin, Yves Prin
Tripartite interactions between legumes and their root symbionts (rhizobia, arbuscular mycorrhizal fungi (AMF)) are poorly understood, although it is well established that only specific combinations of symbionts lead to optimal plant growth. A classic example in which to investigate such interactions is the Brazilian legume tree Piptadenia gonoacantha (Caesalpinioideae), for which efficient nodulation has been described as dependent on the presence of AMF symbiosis. In this study we compared the nodulation behaviour of several rhizobial strains with or without AMF inoculation, and performed analyses on nodulation, nodule cytology, N-fixing efficiency and plant growth response...
October 23, 2017: Plant, Cell & Environment
Richard Brackin, Brian S Atkinson, Craig J Sturrock, Amanda Rasmussen
Improvement in fertilizer use efficiency is a key aspect for achieving sustainable agriculture in order to minimize costs, greenhouse gas emissions, and pollution from nutrient run-off. To optimize root architecture for nutrient uptake and efficiency, we need to understand what the roots encounter in their environment. Traditional methods of nutrient sampling, such as salt extractions can only be done at the end of an experiment, are impractical for sampling locations precisely and give total nutrient values that can overestimate the nutrients available to the roots...
October 23, 2017: Plant, Cell & Environment
Hugh Morris, Mark A F Gillingham, Lenka Plavcová, Sean M Gleason, Mark E Olson, David A Coomes, Esther Fichtler, Matthias M Klepsch, Hugo I Martínez-Cabrera, Daniel J McGlinn, Elisabeth A Wheeler, Jingming Zheng, Kasia Ziemińska, Steven Jansen
Parenchyma represents a critically important living tissue in the sapwood of the secondary xylem of woody angiosperms. Considering various interactions between parenchyma and water transporting vessels, we hypothesise a structure-function relationship between both cell types. Through a generalised additive mixed model approach based on 2,332 woody angiosperm species derived from the literature, we explored the relationship between the proportion and spatial distribution of ray and axial parenchyma and vessel size, while controlling for maximum plant height and a range of climatic factors...
October 19, 2017: Plant, Cell & Environment
Upinder S Gill, Srinivasa R Uppalapati, Lina Gallego-Giraldo, Yasuhiro Ishiga, Richard A Dixon, Kirankumar S Mysore
Downregulation of lignin in alfalfa (Medicago sativa L.) is associated with increased availability of cell wall polysaccharides in plant cells. We tested transgenic alfalfa plants downregulated for Caffeoyl-CoA O-methyltransferase (CCoAOMT) against an economically important fungal disease of alfalfa, Fusarium wilt caused by Fusarium oxysporum f. sp. medicaginis, and found it more resistant to this disease. Transcriptomic and metabolomic analyses indicated that the improved disease resistance against Fusarium wilt is due to increased accumulation and/or spillover of flux towards the (iso)flavonoid pathway...
October 19, 2017: Plant, Cell & Environment
Chao-Chao Liu, Golam Jalal Ahammed, Guo-Ting Wang, Chang-Jie Xu, Kun-Song Chen, Yan-Hong Zhou, Jing-Quan Yu
Blue light photoreceptors, cryptochromes (CRYs), regulate multiple aspects of plant growth and development. However, our knowledge of CRYs is predominantly based on model plant Arabidopsis at early growth stage. In this study, we elucidated functions of CRY1a gene in mature tomato (Solanum lycopersicum) plants by using cry1a mutants and CRY1a overexpressing lines (OE-CRY1a-1 and OE-CRY1a-2). In comparison with wild-type plants, cry1a mutants are relatively tall, accumulate low biomass and bear more fruits, whereas OE-CRY1a plants are short stature, and they not only flower lately but also bear less fruits...
October 18, 2017: Plant, Cell & Environment
Dekuan Li, Liang Zhang, Xiaoyi Li, Xiangge Kong, Xiaoyu Wang, Ying Li, Zhibin Liu, Jianmei Wang, Xufeng Li, Yi Yang
The phytohormone abscisic acid (ABA) plays an important role in regulating plant growth, development and adaption to various environmental stresses. Regulatory components of ABA receptors (RCARs, also known as PYR/PYLs) sense ABA and initiate ABA signaling through inhibiting the activities of protein phosphatase 2C (PP2C) in Arabidopsis. However, the way in which ABA receptors are regulated is not well known. A DWD protein AtRAE1 (for RNA export factor 1 in Arabidopsis), which may act as a substrate receptor of CUL4-DDB1 E3 ligase, is an interacting partner of RCAR1/PYL9...
October 18, 2017: Plant, Cell & Environment
Xin-Zheng Huang, Yu-Tao Xiao, Tobias G Köllner, Wei-Xia Jing, Jun-Feng Kou, Jie-Yin Chen, Dan-Feng Liu, Shao-Hua Gu, Jun-Xiang Wu, Yong-Jun Zhang, Yu-Yuan Guo
Herbivore-induced terpenes have been reported to function as ecological signals in plant-insect interactions. Here we showed that insect-induced cotton volatile blends contained 16 terpenoid compounds with a relatively high level of linalool. The high diversity of terpene production is derived from a large terpene synthase (TPS) gene family. The TPS gene family of Gossypium hirsutum and G. raimondii consist of 46 and 41 members, respectively. Twelve TPS genes (GhTPS4-15) could be isolated and protein expression in E...
October 18, 2017: Plant, Cell & Environment
Stacy D Singer, Abdelali Hannoufa, Surya Acharya
Due to an expanding world population and increased buying power, the demand for ruminant products such as meat and milk is expected to grow substantially in coming years and high levels of forage crop production will therefore be a necessity. Unfortunately, urbanization of agricultural land, intensive agricultural practices, and climate change are all predicted to limit crop production in the future, which means that the development of forage cultivars with improved productivity and adaptability will be essential...
October 18, 2017: Plant, Cell & Environment
Franklin Magnum de Oliveira Silva, Gabriel Lichtenstein, Saleh Alseekh, Laise Rosado-Souza, Mariana Conte, Vanessa Fuentes Suguiyama, Bruno Silvestre Lira, Dimitrios Fanourakis, Björn Usadel, Leonardo Lopes Bhering, Fábio M DaMatta, Ronan Sulpice, Wagner L Araújo, Magdalena Rossi, Nathalia de Setta, Alisdair R Fernie, Fernando Carrari, Adriano Nunes-Nesi
To identify genomic regions involved in the regulation of fundamental physiological processes such as photosynthesis and respiration, a population of Solanum pennellii introgression lines (ILs) was analyzed. We determined phenotypes for physiological, metabolic and growth related traits, including gas-exchange and chlorophyll fluorescence parameters. Data analysis allowed the identification of 208 physiological and metabolic QTL with 33 of these being associated to smaller intervals of the genomic regions, termed BINs...
October 18, 2017: Plant, Cell & Environment
M Djanaguiraman, R Perumal, S V K Jagadish, I A Ciampitti, R Welti, P V V Prasad
High temperature (HT) decreases seed-set percentage in sorghum [Sorghum bicolor (L.) Moench]. The relative sensitivity of pollen and particularly pistil and the mechanistic response that induces tolerance or susceptibility to HT is not well known and hence is the major objective of this research. The male sterile (ATx399) and fertile (RTx430) lines were exposed to 30/20 °C (optimum temperature; OT), 36/26 °C (HT1 ) and 39/29 °C (HT2 ) from the start of booting to seed-set in a controlled environment. Similarly, in the field, HT stress was imposed using heat tents...
October 18, 2017: Plant, Cell & Environment
Akihiro Ohtsuka, Lawren Sack, Haruhiko Taneda
The lignification of the leaf vein bundle sheath (BS) has been observed in many species, and would reduce conductance from xylem to mesophyll. We hypothesized that lignification of the BS in lower-order veins would provide benefits for water delivery through the vein hierarchy but that the lignification of higher-order veins would limit transport capacity from xylem to mesophyll and leaf hydraulic conductance (Kleaf ). We further hypothesized that BS lignification would mediate the relationship of Kleaf to vein length per area (VLA)...
October 18, 2017: Plant, Cell & Environment
Santiago Alvarez Prado, Llorenç Cabrera-Bosquet, Antonin Grau, Aude Coupel-Ledru, Emilie J Millet, Claude Welcker, François Tardieu
Stomatal conductance is central for the trades-off between hydraulics and photosynthesis. We aimed at deciphering its genetic control and that of its responses to evaporative demand and water deficit, a nearly impossible task with gas exchanges measurements. Whole-plant stomatal conductance was estimated via inversion of the Penman Monteith equation from data of transpiration and plant architecture collected in a phenotyping platform. We have analyzed jointly four experiments with contrasting environmental conditions imposed to a panel of 254 maize hybrids...
October 17, 2017: Plant, Cell & Environment
Alka Shankar, Joel Lars Fernandes, Kanwaljeet Kaur, Manisha Sharma, Suman Kundu, Girdhar K Pandey
Just like animals, plants also contain haemoglobins (known as phytoglobins in plants). Plant phytoglobins (Pgbs) have been categorized into six different classes viz. Phytogb0 (Pgb0), Phytogb1 (Pgb1), Phytogb2 (Pgb2), SymPhytogb (sPgb), Leghemoglobin (Lb) and Phytogb3 (Pgb3). Among the 6 Phytogbs, sPgb and Lb have been functionally characterized and the understanding of roles of other Pgbs is still evolving. In our present study, we have explored the function of two rice Pgbs (OsPgb1.1 and OsPgb1.2). OsPgb1...
October 17, 2017: Plant, Cell & Environment
Craig R Yendrek, Gorka Erice, Christopher M Montes, Tiago Tomaz, Crystal A Sorgini, Patrick J Brown, Lauren M McIntyre, Andrew D B Leakey, Elizabeth A Ainsworth
Exposure to elevated tropospheric ozone concentration ([O3 ]) accelerates leaf senescence in many C3 crops. However, the effects of elevated [O3 ] on C4 crops including maize (Zea mays L.) are poorly understood in terms of physiological mechanism and genetic variation in sensitivity. Using free air gas concentration enrichment, we investigated the photosynthetic response of 18 diverse maize inbred and hybrid lines to season-long exposure to elevated [O3 ] (~100 nl L(-1) ) in the field. Gas exchange was measured on the leaf subtending the ear throughout the grain filling period...
October 17, 2017: Plant, Cell & Environment
Z Huang, S Footitt, A Tang, W E Finch-Savage
Seed characteristics are key components of plant fitness that are influenced by temperature in their maternal environment, and temperature will change with global warming. To study the effect of such temperature changes, Arabidopsis thaliana plants were grown to produce seeds along a uniquely designed polyethylene tunnel having a thermal gradient reflecting local global warming predictions. Plants therefore experienced the same variations in temperature and light conditions, but different mean temperatures...
October 17, 2017: Plant, Cell & Environment
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