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Plant Physiology and Biochemistry: PPB

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https://www.readbyqxmd.com/read/28432978/cadmium-hampers-salt-tolerance-of-sesuvium-portulacastrum
#1
Mariem Wali, Soledad Martos, Laura Pérez-Martín, Chedly Abdelly, Tahar Ghnaya, Charlotte Poschenrieder, Benet Gunsé
It is well known that salinity reduces cadmium toxicity in halophytes. However, the possible interference of Cd with the mechanisms of salt tolerance is poorly explored. The aim of this study was to see whether Cd affects salt tolerance mechanisms in the halophyte Sesuvium portulacastrum. S. portulacastrum plants obtained from cuttings were grown in hydroponics for 3 weeks and then exposed to low (0.09 mM) or moderate (200 mM) NaCl concentrations, alone or in combination with 25 μM CdCl2. Microscopy observation revealed two strategies of salt tolerance: euhalophytism and secretion of salt by bladder cells...
April 13, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28432977/effect-of-short-term-zn-pb-or-long-term-multi-metal-stress-on-physiological-and-morphological-parameters-of-metallicolous-and-nonmetallicolous-echium-vulgare-l-populations
#2
Sławomir Dresler, Magdalena Wójciak-Kosior, Ireneusz Sowa, Grzegorz Stanisławski, Izabela Bany, Małgorzata Wójcik
The aim of the study was to determine the response of metallicolous and nonmetallicolous Echium vulgare L. populations to chronic multi-metal (Zn, Pb, Cd) and acute Zn (200, 400 μM) and Pb (30, 60 μM) stress. Three populations of E. vulgare, one from uncontaminated and two from metal-contaminated areas, were studied. Two types of experiments were performed - a short-term hydroponic experiment with acute Zn or Pb stress and a long-term manipulative soil experiment with the use of soils from the sites of origin of the three populations...
April 13, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28431355/genome-wide-identification-and-analysis-of-the-populus-trichocarpa-tify-gene-family
#3
Yue Wang, Feng Pan, Danmei Chen, Wenyuan Chu, Huanlong Liu, Yan Xiang
The plant-specific TIFY proteins are widely present in land plants and play the important roles in the regulation of plant stress-responses. In this study, we carried out a bioinformatics analysis of TIFY genes in Populus trichocarpa by determining the phylogenetic relationship, chromosomal location and gene structure and expression profiles analysis under stresses. The 24 TIFY genes were identified and classified into four subfamilies (ZML, JAZ, PPD and TIFY). The 24 TIFY genes were irregularly located on 13 of the 19 chromosomes; ten gene pairs were involved in large-scale interchromosomal segmental duplication events; we identified 17 collinear TIFY gene pairs in the Populus trichocarpa genome...
April 13, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28441627/effect-of-in%C3%A2-vitro-drought-stress-on-phenolic-acids-flavonols-saponins-and-antioxidant-activity-in-agave-salmiana
#4
César A Puente-Garza, Cristina Meza-Miranda, Desiree Ochoa-Martínez, Silverio García-Lara
This work evaluated the effect of in vitro drought stress on morphological characteristics, phenolic compounds, flavonols, saponin content, and antioxidant activity in plantlets of Agave salmiana. Drought stress was induced with polyethylene glycol (PEG) at 0, 10, 20 and 30% w/v in Murashige and Skoog solid medium. The determination of specific flavonols and saponins was achieved via HPLC-DAD and HPLC-ELSD, respectively. Compared with the control, plants grown in 30% PEG showed a change in the width of the leaves and a different color, showing less clarity and more darkening (L = 21...
April 10, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28415032/comparative-metabolome-analysis-of-wheat-embryo-and-endosperm-reveals-the-dynamic-changes-of-metabolites-during-seed-germination
#5
Caixia Han, Shoumin Zhen, Gengrui Zhu, Yanwei Bian, Yueming Yan
In this study, we performed the first comparative metabolomic analysis of the wheat embryo and endosperm during seed germination using GC-MS/MS. In total, 82 metabolites were identified in the embryo and endosperm. Principal component analysis (PCA), metabolite-metabolite correlation and hierarchical cluster analysis (HCA) revealed distinct dynamic changes in metabolites between the embryo and endosperm during seed germination. Generally, the metabolite changes in the embryo were much greater than those in the endosperm, suggesting that the embryo is more active than the endosperm during seed germination...
April 10, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28419961/evidence-towards-the-involvement-of-nitric-oxide-in-drought-tolerance-of-sugarcane
#6
Neidiquele M Silveira, John T Hancock, Lucas Frungillo, Eleni Siasou, Fernanda C C Marcos, Ione Salgado, Eduardo C Machado, Rafael V Ribeiro
Exogenous supply of nitric oxide (NO) increases drought tolerance in sugarcane plants. However, little is known about the role of NO produced by plants under water deficit. The aim of this study was to test the hypothesis that drought-tolerance in sugarcane is associated with NO production and metabolism, with the more drought-tolerant genotype presenting higher NO accumulation in plant tissues. The sugarcane genotypes IACSP95-5000 (drought-tolerant) and IACSP97-7065 (drought-sensitive) were submitted to water deficit by adding polyethylene glycol (PEG-8000) in nutrient solution to reduce the osmotic potential to -0...
April 8, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28412632/seed-dormancy-and-germination-of-the-medicinal-holoparasitic-plant-cistanche-deserticola-from-the-cold-desert-of-northwest-china
#7
Jia Wang, Jerry M Baskin, Carol C Baskin, Guofang Liu, Xuejun Yang, Zhenying Huang
Cistanche deserticola is a holoparasitic plant with high medicinal value that reproduces only by seeds. However, the requirements for seed dormancy break and germination of this species remain unclear. The freshly matured dust-like seeds consist of a water-permeable seed coat and an undifferentiated oval-shaped embryo embedded in endosperm. No fresh seeds germinated in water or a 10(-5) M fluridone solution at any incubation temperature within 60 days. Length of embryos in seeds incubated in warm- and cold-started stratification sequences had increased 10...
April 8, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28419960/preferentially-enhancing-anti-cancer-isothiocyanates-over-glucosinolates-in-broccoli-sprouts-how-nacl-and-salicylic-acid-affect-their-formation
#8
Azadeh Esfandiari, Ali Saei, Marian J McKenzie, Adam J Matich, Mesbah Babalar, Donald A Hunter
Broccoli (Brassica oleracea L. var. italica) sprouts contain glucosinolates (GLs) that when hydrolysed yield health promoting isothiocyanates such as sulforaphane (SF). SF content can be increased by salt (NaCl) stress, although high salt concentrations negatively impact plant growth. Salicylic acid (SA) treatments can attenuate the negative effects of salt on growth. To test whether sprout isothiocyanate content could be elevated without sprout growth being compromised, broccoli seed were germinated and grown for seven days in salt (0, 80 and 160 mM) alone and in combination with 100 μM SA...
April 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28412634/chitosan-induced-immunity-in-camellia-sinensis-l-o-kuntze-against-blister-blight-disease-is-mediated-by-nitric-oxide
#9
Swarnendu Chandra, Nilanjan Chakraborty, Koustubh Panda, Krishnendu Acharya
Blister blight disease, caused by an obligate biotrophic fungal pathogen, Exobasidium vexans Massee is posing a serious threat for tea cultivation in Asia. As the use of chemical pesticides on tea leaves substantially increases the toxic risks of tea consumption, serious attempts are being made to control such pathogens by boosting the intrinsic natural defense responses against invading pathogens in tea plants. In this study, the nature and durability of resistance offered by chitosan and the possible mechanism of chitosan-induced defense induction in Camellia sinensis (L...
April 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28411511/elevated-co2-and-salinity-are-responsible-for-phenolics-enrichment-in-two-differently-pigmented-lettuces
#10
Cristina Sgherri, Usue Pérez-López, Francesco Micaelli, Jon Miranda-Apodaca, Amaia Mena-Petite, Alberto Muñoz-Rueda, Mike Frank Quartacci
Both salt stress and high CO2 level, besides influencing secondary metabolism, can affect oxidative status of plants mainly acting in an opposite way with salinity provoking oxidative stress and elevated CO2 alleviating it. The aim of the present work was to study the changes in the composition of phenolic acids and flavonoids as well as in the antioxidant activity in two differently pigmented lettuce cvs (green or red leaf) when submitted to salinity (200 mM NaCl) or elevated CO2 (700 ppm) or to their combination in order to evaluate how a future global change can affect lettuce quality...
April 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28441628/potassium-deficiency-affects-the-carbon-nitrogen-balance-in-cotton-leaves
#11
Wei Hu, Taylor D Coomer, Dimitra A Loka, Derrick M Oosterhuis, Zhiguo Zhou
Potassium (K) plays important roles in the metabolism of carbon (C) and nitrogen (N), but studies of K deficiency affecting C-N balance are lacking. This study explored the influence of K deficiency on C-N interaction in cotton leaves by conducting a field experiment with cotton cultivar DP0912 under two K rates (K0: 0 kg K2O ha(-1) and K67: 67 kg K2O ha(-1)) and a controlled environment experiment with K-deficient solution (K1: 0 mM K(+)) and K-sufficient solution (K2: 6 mM K(+)). The results showed that leaf K content, leaf number, leaf area, boll number, reproductive dry weight and total dry weight were significant lower under K deficiency (K0 or K1)...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28432976/cuticular-wax-coverage-and-composition-differ-among-organs-of-taraxacum-officinale
#12
Yanjun Guo, Lucas Busta, Reinhard Jetter
Primary plant surfaces are coated with hydrophobic cuticular waxes to minimize non-stomatal water loss. Wax compositions differ greatly between plant species and, in the few species studied systematically so far, also between organs, tissues, and developmental stages. However, the wax mixtures of more species in diverse plant families must be investigated to assess overall wax variability, and ultimately to correlate organ-specific composition with local water barrier properties. Here, we present comprehensive analyses of the waxes covering five organs of Taraxacum officinale (dandelion), to help close a gap in our understanding of wax chemistry in the Asteraceae family...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28412633/relationship-among-color-development-anthocyanin-and-pigment-related-gene-expression-in-crimson-seedless-grapes-treated-with-abscisic-acid-and-sucrose
#13
Daniela Olivares, Carolina Contreras, Victoria Muñoz, Sebastián Rivera, Mauricio González-Agüero, Julio Retamales, Bruno G Defilippi
'Crimson Seedless' is one of the most important table grape varieties in Chile, but under certain environmental conditions, the fruit exhibits inadequate red color development, causing economic losses due to lower product quality. The use of plant growth regulators, such as abscisic acid (ABA) and ethylene, during development increases the anthocyanin content of the skin, improving the color of the berry. Recently, sucrose has been identified as a signaling molecule capable of regulating the expression of genes of the anthocyanin biosynthesis pathway...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28402912/changes-in-growth-and-physiological-parameters-of-spring-barley-and-common-radish-under-the-influence-of-1-butyl-2-3-dimethylimidazolium-tetrafluoroborate
#14
Robert Biczak
Ionic liquids (ILs) constitute a large group of chemical substances, which, thanks to their desirable properties, still attract attention of scientists and representatives of the industry. This may lead to a greater commercial use of these compounds, which will undoubtedly lead to the contamination of soils, constituting the basis of plant vegetation, with these substances. This paper presents effect of 1-butyl-2,3-dimethylimidazolium tetrafluoroborate [BMMIM][BF4] on the growth and development of spring barley and common radish and on the physiological and biochemical changes in these plants...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28399490/prognosis-of-physiological-disorders-in-physic-nut-to-n-p-and-k-deficiency-during-initial-growth
#15
Elcio Ferreira Santos, Fernando Giovannetti Macedo, Bruno José Zanchim, Giuseppina Pace Pereira Lima, José Lavres
The description of physiological disorders in physic nut plants deficient in nitrogen (N), phosphorus (P) and potassium (K) may help to predict nutritional imbalances before the appearance of visual symptoms and to guide strategies for early nutrient supply. The aim of this study was to evaluate the growth of physic nuts (Jatropha curcas L.) during initial development by analyzing the gas exchange parameters, nutrient uptake and use efficiency, as well as the nitrate reductase and acid phosphatase activities and polyamine content...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28395169/the-heterologous-expression-of-a-chrysanthemum-tcp-p-transcription-factor-cmtcp14-suppresses-organ-size-and-delays-senescence-in-arabidopsis-thaliana
#16
Ting Zhang, Yixin Qu, Haibin Wang, Jingjing Wang, Aiping Song, Yueheng Hu, Sumei Chen, Jiafu Jiang, Fadi Chen
TCP transcription factors are important for plant growth and development, but their activity in chrysanthemum (Chrysanthemum morifolium) has not been thoroughly explored. Here, a chrysanthemum TCP-P sequence, which encodes a protein harboring the conserved basic helix-loop-helix (bHLH) motif, was shown to be related phylogenetically to the Arabidopsis thaliana gene AtTCP14. A yeast-one hybrid assay showed that the encoding protein had no transcriptional activation ability, and a localization experiment indicated that it was localized in the nucleus...
April 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28415031/carotenoid-accumulation-in-durian-durio-zibethinus-fruit-is-affected-by-ethylene-via-modulation-of-carotenoid-pathway-gene-expression
#17
Apinya Wisutiamonkul, Charles Ampomah-Dwamena, Andrew C Allan, Saichol Ketsa
Carotenoid content in durian (Durio zibethinus) fruit is an important aspect of fruit quality, with different cultivars distinguished by differing pigmentation. We have studied the dependence of carotenogenesis on ethylene. Fruit of the cultivar 'Chanee' harvested at the mature stage were either left untreated (controls), treated with 1-methylcyclopropene (1-MCP) for 12 h, or treated with application of an aqueous ethephon solution to the stem end, or treated for 12 h with 1-MCP followed by ethephon application...
March 31, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28384562/overexpression-of-mpcys4-a-phytocystatin-gene-from-malus-prunifolia-willd-borkh-delays-natural-and-stress-induced-leaf-senescence-in-apple
#18
Yanxiao Tan, Yingli Yang, Chao Li, Bowen Liang, Mingjun Li, Fengwang Ma
Phytocystatins are a well-characterized class of naturally occurring protease inhibitors that prevent the catalysis of papain-like cysteine proteases. The action of cystatins in stress tolerance has been studied intensively, but relatively little is known about their functions in plants during leaf senescence. Here, we examined the potential roles of the apple cystatin, MpCYS4, in leaf photosynthesis as well as the concentrations and composition of leaf proteins when plants encounter natural or stress-induced senescence...
March 31, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28384561/first-confirmation-and-characterization-of-target-and-non-target-site-resistance-to-glyphosate-in-palmer-amaranth-amaranthus-palmeri-from-mexico
#19
Jose Alfredo Dominguez-Valenzuela, Javid Gherekhloo, Pablo Tomás Fernández-Moreno, Hugo Enrique Cruz-Hipolito, Ricardo Alcántara-de la Cruz, Eduardo Sánchez-González, Rafael De Prado
Following the introduction of glyphosate-resistant (GR)-cotton crops in Mexico, farmers have relied upon glyphosate as being the only herbicide for in-season weed control. Continuous use of glyphosate within the same year and over multiple successive years has resulted in the selection of glyphosate resistance in Palmer amaranth (Amarantus palmeri). Dose-response assays confirmed resistance in seven different accessions. The resistance ratio based on GR50 values (50% growth reduction) varied between 12 and 83...
March 31, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28415033/physiological-investigation-of-c4-phosphoenolpyruvate-carboxylase-introduced-rice-line-shows-that-sucrose-metabolism-is-involved-in-the-improved-drought-tolerance
#20
Chen Zhang, Xia Li, Yafei He, Jinfei Zhang, Ting Yan, Xiaolong Liu
We compared the drought tolerance of wild-type (WT) and transgenic rice plants (PC) over-expressing the maize C4PEPC gene, which encodes phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31) gene, and evaluated the roles of saccharide and sugar-related enzymes in the drought response. Pot-grown seedlings were subjected to real drought conditions outdoors, and the yield components were compared between PC and untransformed wild-type (WT) plants. The stable yield from PC plants was associated with higher net photosynthetic rate under the real drought treatment...
March 30, 2017: Plant Physiology and Biochemistry: PPB
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