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Plant Physiology and Biochemistry: PPB

Anikó Mátai, Dóra Nagy, Éva Hideg
Potentials of UV-B (280-315 nm) radiation to alleviate effects of water deficit were studied using Nicotiana benthamiana plants in growth chambers. 10-days of limited watering resulted in 40% loss of soil water content as compared to well-watered controls. This drought was applied in three different ways: (i) in itself, (ii) after 4-days exposure of 6.9 kJ m-2 d-1 biologically effective supplementary UV-B radiation as pre-treatment, or (iii) in parallel with 6.9 kJ m-2 d-1 biologically effective supplementary UV-B...
September 12, 2018: Plant Physiology and Biochemistry: PPB
Yunji Huang, Haixia Zhao, Fei Gao, Panfeng Yao, Renyu Deng, Chenglei Li, Hui Chen, Qi Wu
Abiotic stress causes various negative impacts on plants, such as water loss, reactive oxygen species (ROS) accumulation and decreased photosynthesis. R2R3-MYB transcription factors (TFs) play crucial roles in the response of plants to abiotic stress. However, their functions in Tartary buckwheat, a strongly abiotic and resistant coarse cereal, haven't been fully investigated. In this paper, we report that a R2R3-MYB from Tartary buckwheat, FtMYB13, is not an activator of transcriptional activity but is located in the nucleus...
September 11, 2018: Plant Physiology and Biochemistry: PPB
Twinkle Solanki, Pedro J Aphalo, Santa Neimane, Saara M Hartikainen, Marta Pieristè, Alexey Shapiguzov, Albert Porcar-Castell, Jon Atherton, Anu Heikkilä, Thomas Matthew Robson
Evergreen plants in boreal biomes undergo seasonal hardening and dehardening adjusting their photosynthetic capacity and photoprotection; acclimating to seasonal changes in temperature and irradiance. Leaf epidermal ultraviolet (UV)-screening by flavonols responds to solar radiation, perceived in part through increased ultraviolet-B (UV-B) radiation, and is a candidate trait to provide cross-photoprotection. At Hyytiälä Forestry Station, central Finland, we examined whether the accumulation of flavonols was higher in leaves of Vaccinium vitis-idaea L...
September 8, 2018: Plant Physiology and Biochemistry: PPB
Tao Song, Qian Zhang, Haiqi Wang, Jianbo Han, Zhiqiang Xu, Shuning Yan, Zhengge Zhu
JmjC-domain-containing (JmjC) protein, an important kind of histone demethylase in plants, plays key roles in multiple growth and development processes and in adversity resistance. In this study, we found that OsJMJ703, a known histone demethylase, is expressed in various tissues. Furthermore, over-expression of OsJMJ703 influenced the type of rice panicle, and knock-down of the expression of OsJMJ703 showed an earlier flowering time in rice. In addition, OsJMJ703 is involved in abiotic stress. Transgenic rice of over-expressing OsJMJ703 is sensitive to drought stress, whereas knocking down OsJMJ703 enhances the tolerance to drought stress...
September 6, 2018: Plant Physiology and Biochemistry: PPB
Thayna Mendanha, Eva Rosenqvist, Benita Hyldgaard, Carl-Otto Ottosen
The incidence of heat episodes during the phase of reproductive development in crops is accountable for great yield losses worldwide. Plants subjected to stress events during vegetative stages (primed) are reported be more resistant to future stress exposure during the reproductive phases. We aimed to test if repeated early abiotic stresses could improve heat tolerance during anthesis in wheat cultivars. Two wheat cultivars (Triticum aestivum L.), 'Gladius' and 'Paragon', were subjected to a heat priming process consisting of two periods with heat at the developmental stages of three and five completely developed leaves, respectively...
September 5, 2018: Plant Physiology and Biochemistry: PPB
Brígida Fernández de Simón, Estrella Cadahía, Ismael Aranda
Global climate changes involve elevated atmospheric [CO2 ], fostering the carbon allocation to tree sink tissues, partitioning it into metabolic pathways. We use metabolomics analysis in adult and juvenile needles of four Pinus pinaster genotypes exposed to two levels of growth [CO2 ]: ambient (400 μmol mol-1 ) and enriched (800 μmol mol-1 ), to know if the metabolic responses are genotype-dependent and vary according to the stage of needle ontogeny. The eCO2 -induced changes in the needle metabolomes are more significant in secondary metabolism pathways and especially meaningful in juvenile needles...
September 5, 2018: Plant Physiology and Biochemistry: PPB
Chun Quan Zhu, Xiao Chuang Cao, Lian Feng Zhu, Wen Jun Hu, An Yong Hu, Zhi Gang Bai, Chu Zhong, Li Ming Sun, Qing Duo Liang, Jie Huang, Shun Xi Yang, Jun Hua Zhang, Qian Yu Jin
In plants, different forms of nitrogen (NO3 - or NH4 + ) affect nutrient uptake and environmental stress responses. In the present study, we tested whether NO3 - and NH4 + affect the ability of rice (Oryza sativa) to tolerate the toxic heavy metal cadmium (Cd). Compared with NO3 - , NH4 + treatment significantly increased chlorophyll contents and reduced Cd2+ levels in rice cultivars Nipponbare (japonica) and Kasalath (indica) grown in 0.2 mM Cd2+ . NH4 + significantly reduced the pectin and hemicellulose contents and inhibited the pectin methylesterase (PME) activity in rice roots, thereby reducing the negative charges in the cell wall and decreasing the accumulation of Cd2+ in roots...
September 5, 2018: Plant Physiology and Biochemistry: PPB
Gurpreet Singh, Harkamal Kaur Sahota
BACKGROUND AND AIMS: Fungicides, though beneficial for agricultural productivity, are known to interfere with the basic metabolism and induce the formation of various biomolecules and also alter the physiological parameters of plant growth. The present study is an attempt to understand the effect of different conc. of benzimidazole (Carbendazim) and dithocarbamate (Mancozeb) fungicides on photosynthetic components such as chlorophyll content, total sugar and phenolic content and various antioxidative enzymes in developing seedlings of chickpea...
September 4, 2018: Plant Physiology and Biochemistry: PPB
Anna Räsch, Mauricio Hunsche, Matthias Mail, Jürgen Burkhardt, Georg Noga, Shyam Pariyar
Adjuvants such as surfactants are commonly incorporated into agrochemical formulations to enhance the biological efficiency of foliar sprays by improving the wetting behavior of the spray and/or the penetration of the active ingredients into the leaf tissues. Penetration accelerating adjuvants are known to increase the cuticular permeability and may alter the cuticular barrier to water loss. However, none or very little emphasis has been given to the impacts of adjuvants on crop water balance or drought tolerance, a very important factor affecting crop performance under water scarcity...
September 3, 2018: Plant Physiology and Biochemistry: PPB
Micaela Peppino Margutti, Virginia L Gaveglio, Matias Reyna, Susana J Pasquaré, Graciela E Racagni, Ana Laura Villasuso
Phosphatidic acid (PA) is an important bioactive lipid that mediates chilling responses in barley. Modifications in the lipid composition of cellular membranes during chilling are essential to maintain their integrity and fluidity. First, we investigated the molecular species of PA present in leaves and roots by ESI-MS/MS, to evaluate the modifications that occur in response to chilling. We demonstrated that PA pools in leaves differ from PA fatty acid composition in roots. Compared with plants grown at 25 °C, the short-term and long-term chilling for 3 h and 36 h at 4 °C not produced significant changes in PA molecular species...
September 1, 2018: Plant Physiology and Biochemistry: PPB
Lucia Yepes, Najla Chelbi, Juana-María Vivo, Manuel Franco, Agatha Agudelo, Micaela Carvajal, María Del Carmen Martínez-Ballesta
Soil salinity is one of the main factors affecting plant growth. Dissection of plant response to salinity into physiological traits may result a simple approximation than the overall response that may influence many aspects of the plant. In the present study two factors were considered to evaluate the correlation of different physiological variables in the plant response to salinity. The first factor was the species, with four levels (Atriplex halimus, Salicornia fruticosa, Cakile maritima, and Brassica rapa), and the second was the salinity (0, 100, 200, and 300 mM NaCl)...
August 31, 2018: Plant Physiology and Biochemistry: PPB
Xiaochuang Cao, Chu Zhong, Chunquan Zhu, Lianfeng Zhu, Junhua Zhang, Lianghuan Wu, Qianyu Jin
Ammonium (NH4 + ) can enhance the water stress induced drought tolerance of rice seedlings in comparison to nitrate (NO3 - ) nutrition. To investigate the mechanism involved in nitrogen (N) uptake, N metabolism and transcript abundance of associated genes, a hydroponic experiment was conducted in which different N sources were supplied to seedlings growing under water stress. Compared to nitrate, ammonium prevented water stress-induced biomass, leaf SPAD and photosynthesis reduction to a significantly larger extent...
August 31, 2018: Plant Physiology and Biochemistry: PPB
Xinran Cheng, Rui Xiong, Huanlong Liu, Min Wu, Feng Chen, Hanwei Yan, Yan Xiang
Studies have shown that basic helix-loop-helix (bHLH) transcription factors play important roles in plant growth and survival, and response to various biotic/abiotic stresses. We identified a total of 448 bHLH genes. These genes were classified into 21 bHLH subfamilies, and most genes in a given subfamily had similar gene structures and conserved motifs. We identified 176 homologous pairs in the three species. We calculated Ka, Ks, and Ka/Ks to analyze the replication relationships among the three species. Multiple sequence analysis revealed that the PebHLH genes had the distinct bHLH structure...
August 30, 2018: Plant Physiology and Biochemistry: PPB
Bing Zhang, Jianxiu Liu, Xiaoshan Wang, Zhenwu Wei
Bermudagrass [Cynodon dactylon (L.) Pers.] is an important perennial warm-season turfgrass species with great economic value. However, the reference genome and transcriptome information are still deficient in bermudagrass, which severely impedes functional and molecular breeding studies. In this study, through analyzing a mixture sample of leaves, stolons, shoots, roots and flowers with single-molecule long-read sequencing technology from Pacific Biosciences (PacBio), we reported the first full-length transcriptome dataset of bermudagrass (C...
August 30, 2018: Plant Physiology and Biochemistry: PPB
Qin Zhou, Mei Huang, Xin Huang, Jing Liu, Xiao Wang, Jian Cai, Tingbo Dai, Weixing Cao, Dong Jiang
Waterlogging is one of the most common abiotic stress types in wheat production in many rainy areas of the world. Two locally widely grown winter wheat (Triticum aestivum L. cv Yumai 34 and Yangmai 9) were subjected to post-anthesis waterlogging in a pot experiment to investigate the impacts of waterlogging on the starch synthesis and the physiochemical properties. Post-anthesis waterlogging significantly decreased grain weight and affected the content of starch components. Waterlogging down-regulated the activity and expression of genes encoding soluble starch synthase [SSS (EC 2...
August 29, 2018: Plant Physiology and Biochemistry: PPB
Venkata L Reddy Pullagurala, Ishaq O Adisa, Swati Rawat, Sudhakar Kalagara, Jose A Hernandez-Viezcas, Jose R Peralta-Videa, Jorge L Gardea-Torresdey
The growth of the nanotechnology industry has raised concerns about its environmental impacts. In particular, the effect on terrestrial plants, which are the primary producers of the global food chain, is widely debated. In this study, cilantro plants (Coriandrum sativum) were cultivated for 35 days in soil amended with ZnO nanoparticles (N ZnO), bulk ZnO (B ZnO) and ZnCl2 (ionic/I Zn) at 0-400 mg/kg. Photosynthetic pigments, lipid peroxidation, 1 NMR-based metabolic, and ICP-based metallomic profiles were evaluated...
August 29, 2018: Plant Physiology and Biochemistry: PPB
C Strømme, U Sivadasan, K Nissinen, A Lavola, T Randriamanana, R Julkunen-Tiitto, L Nybakken
Warming affects phenological processes such as spring bud break and autumnal bud set, and also growth rates of trees. Recently, it has been shown that these physiological processes also may be influenced by the ultraviolet-B (UV-B) part of the solar spectrum, and there are reasons to expect that the two environmental factors induce interactive effects when acting in concert. In this study, our aim was to elucidate how experimental enhancements in temperature and UV-B, alone and in combination, affect growth and seasonal phenology of Eurasian aspen (Populus tremula) over several growing seasons (three years)...
August 28, 2018: Plant Physiology and Biochemistry: PPB
Shintaro Inoue, Rihito Morita, Keiko Kuwata, Tadashi Kunieda, Haruko Ueda, Ikuko Hara-Nishimura, Yoshiko Minami
The plant Polygonum tinctorium produces the secondary metabolite indican (indoxyl-β-D-glucoside), a precursor of the blue dye indigo. P. tinctorium synthesizes indican through the actions of the UDP-glucosyltransferase (UGT), indican synthase. Herein, we partially purified an indican synthase from the leaves and subsequently performed peptide mass fingerprinting analysis. Consequently, we identified a fragment that was homologous to a UDP-glucosyltransferase 72B (UGT72B) family member. We named it PtIgs (P...
August 28, 2018: Plant Physiology and Biochemistry: PPB
Peter Váczi, Yngvar Gauslaa, Knut Asbjørn Solhaug
Lichen photobionts in situ have an extremely UV-B tolerant photosystem II efficiency (Fv/Fm). We have quantified the UV-B-screening offered by the mycobiont and the photobiont separately. The foliose lichens Nephroma arcticum and Umbilicaria spodochroa with 1: intact or 2: removed cortices were exposed to 0.7 Wm-2 UV-BBE for 4 h. Intact thalli experienced no reduction in Fv/Fm, whereas cortex removal lowered Fv/Fm in exposed photobiont layers by 22% for U. spodochroa and by 14% for N. arcticum. We also gave this UV-B dose to algal cultures of Coccomyxa and Trebouxia, the photobiont genera of N...
August 27, 2018: Plant Physiology and Biochemistry: PPB
Daihua Ye, Jing Chen, Tingxuan Li, Xizhou Zhang
Pilea sinofasciata is a promising phytoextraction material to remove excess phosphorus (P) from manure-impacted soil. However, little information is available on its physiological response to animal manure treatments. Here, P accumulation, tissue P fractions and acid phosphatase activity were investigated in a mining ecotype (ME) and a non-mining ecotype (NME) of P. sinofasciata at different poultry manure (PM) treatments (0, 25, 50, 75, 100 and 125 g kg-1 ). Biomass and P accumulation of the ME increased up to 50 g kg-1 , after which they significantly decreased; while P accumulation of the NME increased up to 100 g kg-1 ...
August 27, 2018: Plant Physiology and Biochemistry: PPB
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