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Plant Science: An International Journal of Experimental Plant Biology

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https://www.readbyqxmd.com/read/28167043/a-role-for-apx1-gene-in-lead-tolerance-in-arabidopsis-thaliana
#1
Li Jiang, Weiyan Wang, Ziping Chen, Qiuchen Gao, Qixin Xu, Haimei Cao
Lead (Pb) is a dangerous and widespread metal pollutant. Numerous studies have been made in understanding heavy metal detoxification and tolerance in plants, however, relatively few are known about the mechanisms involved in Pb stress response. In this study, we provide evidence for a novel role of APX1 gene in Pb tolerance in Arabidopsis. KO-APX1 mutants apx1-3 and apx1-4 showed more resistant than wild type, and the APX1-complementary COM1 restored the growth state of wild type in Pb stress. The two KO-APX1 mutants showed reduced Pb accumulation, which was accompanied by the activation of metal transporters PDR12 and ATM3 genes expression...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167042/effects-of-tungsten-on-uptake-transport-and-subcellular-distribution-of-molybdenum-in-oilseed-rape-at-two-different-molybdenum-levels
#2
Shiyu Qin, Xuecheng Sun, Chengxiao Hu, Qiling Tan, Xiaohu Zhao, Shoujun Xu
Due to the similarities of molybdenum (Mo) with tungsten (W) in the physical structure and chemical properties, studies involving the two elements have mainly examined their competitive relationships. The objectives of this study were to assess the effects of equimolar W on Mo accumulation, transport and subcellular distribution in oilseed rape at two Mo levels with four treatments: Mo1 (1μmol/L Mo, Low Mo), Mo1+W1 (1μmol/L Mo+1μmol/LW, Low Mo with Low W), Mo200 (200μmol/L Mo, High Mo) and Mo200+W200 (200μmol/L Mo+200μmol/L Mo, High Mo with high W)...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167041/phenotypic-characterization-and-genetic-dissection-of-nine-agronomic-traits-in-tokachi-nagaha-and-its-derived-cultivars-in-soybean-glycine-max-l-merr
#3
Zhangxiong Liu, Huihui Li, Xuhong Fan, Wen Huang, Jiyu Yang, Zixiang Wen, Yinghui Li, Rongxia Guan, Yong Guo, Ruzhen Chang, Dechun Wang, Pengyin Chen, Shuming Wang, Li-Juan Qiu
By using the soybean founder parent Tokachi nagaha and its 137 derived cultivars as materials, a genome-wide association analysis was performed to identify the single nucleotide polymorphisms (SNPs) underlying soybean yield and quality related traits at two planting densities. Results of ANOVA showed that genotype, environment, and genotype by environment interaction effects were all significant for each trait. The Tokachi nagaha-derived soybean population could be divided into two subpopulations based on molecular data, and accessions in each subpopulation were almost all from the same Chinese province...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167040/induction-of-cyclic-electron-flow-around-photosystem-i-during-heat-stress-in-grape-leaves
#4
Yongjiang Sun, Qingwei Geng, Yuanpeng Du, Xinghong Yang, Heng Zhai
Photosystem II (PSII) in plants is susceptible to high temperatures. The cyclic electron flow (CEF) around PSI is thought to protect both PSII and PSI from photodamage. However, the underlying physiological mechanisms of the photosynthetic electron transport process and the role of CEF in grape at high temperatures remain unclear. To investigate this issue, we examined the responses of PSII energy distribution, the P700 redox state and CEF to high temperatures in grape leaves. After exposing 'Cabernet Sauvignon' leaves to various temperatures (25, 30, 35, 40 and 45°C) in the light (600μmol photons m(-2)s(-1)) for 4h, the maximum quantum yield of PSII (Fv/Fm) significantly decreased at high temperatures (40 and 45°C), while the maximum photo-oxidizable P700 (Pm) was not affected...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167039/apple-autophagy-related-protein-mdatg3s-afford-tolerance-to-multiple-abiotic-stresses
#5
Ping Wang, Xun Sun, Xin Jia, Fengwang Ma
The efficient degradation system of autophagy in plant cells has important roles in removing and recycling intracellular components during normal development or under environmental stresses. Formation of autophagosomes requires the conjugation of ubiquitin-like protein ATG8 to phosphatidylethanolamine (PE). We isolated two ubiquitin-conjugating enzyme E2-like ATG3 homologues from Malus domestica - MdATG3a and MdATG3b - that are crucial for ATG8-PE conjugation. Both share a conserved N-terminal, as well as the catalytic and C-terminal domains of ATG3 with HPC and FLKF motifs...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167038/deacclimation-may-be-crucial-for-winter-survival-of-cereals-under-warming-climate
#6
Marcin Rapacz, Barbara Jurczyk, Monika Sasal
Climate warming can change the winter weather patterns. Warmer temperatures during winter result in a lower risk of extreme freezing events. On the other hand the predicted warm gaps during winter will decrease their freezing tolerance. Both contradict effects will affect winter survival but their resultant effect is unclear. In this paper, we demonstrate that climate warming may result in a decrease in winter survival of plants. A field study of winterhardiness of common wheat and triticale was established at 11 locations and repeated during three subsequent winters...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167037/adaptive-strategies-for-nitrogen-metabolism-in-phosphate-deficient-legume-nodules
#7
REVIEW
Alex J Valentine, Aleysia Kleinert, Vagner A Benedito
Legumes play a significant role in natural and agricultural ecosystems. They can fix atmospheric N2 and contribute the fixed N to soils and plant N budgets. In legumes, the availability of P does not only affect nodule development, but also N acquisition and metabolism. For legumes as an important source of plant proteins, their capacity to metabolise N during P deficiency is critical for their benefits to agriculture and the natural environment. In particular for farming, rock P is a non-renewable source of which the world has about 60-80 years of sustainable extraction of this P left...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167036/newly-identified-csp41b-gene-localized-in-chloroplasts-affects-leaf-color-in-rice
#8
Jiasong Mei, Feifei Li, Xuri Liu, Guocheng Hu, Yaping Fu, Wenzhen Liu
A rice mutant with light-green leaves was discovered from a transgenic line of Oryza sativa. The mutant has reduced chlorophyll content and abnormal chloroplast morphology throughout its life cycle. Genetic analysis revealed that a single nuclear-encoded recessive gene is responsible for the mutation, here designated as lgl1. To isolate the lgl1 gene, a high-resolution physical map of the chromosomal region around the lgl1 gene was made using a mapping population consisting of 1984 mutant individuals. The lgl1 gene was mapped in the 76...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167035/enzymatic-production-and-emission-of-floral-scent-volatiles-in-jasminum-sambac
#9
Paramita Bera, Chiranjit Mukherjee, Adinpunya Mitra
Floral scent composed of low molecular weight volatile organic compounds. The sweet fragrance of any evening blooming flower is dominated by benzenoid and terpenoid volatile compounds. Floral scent of Jasminum sambac (Oleaceae) includes three major benzenoid esters - benzylacetate, methylbenzoate, and methylsalicylate and three major terpene compounds viz. (E)-β-ocimene, linalool and α-farnesene. We analyzed concentrations and emission rates of benzenoids and terpenoids during the developmental stages of J...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167034/stwrky8-transcription-factor-regulates-benzylisoquinoline-alkaloid-pathway-in-potato-conferring-resistance-to-late-blight
#10
Kalenahalli N Yogendra, Dhananjay Dhokane, Ajjamada C Kushalappa, Felipe Sarmiento, Ernesto Rodriguez, Teresa Mosquera
The resistance to late blight is either qualitative or quantitative in nature. Quantitative resistance is durable, but challenging due to polygenic inheritance. In the present study, the diploid potato genotypes resistant and susceptible to late blight, were profiled for metabolites. Tissue specific metabolite analysis of benzylisoquinoline alkaloids (BIAs) in response to pathogen infection revealed increased accumulation of morphinone, codeine-6-glucuronide and morphine-3-glucuronides. These BIAs are antimicrobial compounds and possibly involved in cell wall reinforcement, especially through cross-linking cell wall pectins...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167033/combined-elevated-temperature-and-soil-waterlogging-stresses-inhibit-cell-elongation-by-altering-osmolyte-composition-of-the-developing-cotton-gossypium-hirsutum-l-fiber
#11
Yinglong Chen, Haimiao Wang, Wei Hu, Shanshan Wang, Youhua Wang, John L Snider, Zhiguo Zhou
Soil waterlogging events and high temperature conditions occur frequently in the Yangtze River Valley, yet the effects of these co-occurring stresses on fiber elongation have received little attention. In the current study, the combined effect of elevated temperature (ET) and soil waterlogging (SW) more negatively affected final fiber length (reduced by 5.4%-11.3%) than either stress alone by altering the composition of osmotically active solutes (sucrose, malate, and K(+)), where SW had the most pronounced effect...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167032/mitogen-activated-protein-kinases-participate-in-determination-of-apical-basal-symmetry-in-pisum-sativum
#12
Konrad Winnicki, Justyna Teresa Polit, Aneta Żabka, Janusz Maszewski
Mitogen-activated protein kinases (MAPKs) are implicated in various processes in plants. Apart from response to biotic and abiotic stresses they are involved in regulation of embryo development. Although MAPKs were found to be indispensable during embryo development it has never been established at which stages of embryogenesis and in which regions of a plant embryo activated MAPKs can be observed. Here, we show that apical and basal regions display activation of the same types of MAPKs and the only difference concerns the level of their phosphorylation and cellular localization...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167031/opinion-taking-phytoremediation-from-proven-technology-to-accepted-practice
#13
REVIEW
Karen E Gerhardt, Perry D Gerwing, Bruce M Greenberg
Phytoremediation is the use of plants to extract, immobilize, contain and/or degrade contaminants from soil, water or air. It can be an effective strategy for on site and/or in situ removal of various contaminants from soils, including petroleum hydrocarbons (PHC), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), solvents (e.g., trichloroethylene [TCE]), munitions waste (e.g., 2,4,6-trinitrotoluene [TNT]), metal(loid)s, salt (NaCl) and radioisotopes. Commercial phytoremediation technologies appear to be underutilized globally...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167030/cloning-and-characterization-of-sidhn-a-novel-dehydrin-gene-from-saussurea-involucrata-kar-et-kir-that-enhances-cold-and-drought-tolerance-in-tobacco
#14
Xinyong Guo, Li Zhang, Jianbo Zhu, Hongling Liu, Aiying Wang
Saussurea involucrata Kar. et Kir. is a hardy, dicotyledonous plant featured by strong tolerance to severe stress conditions. In a previous study, we created a cDNA library to characterize genetic factors associated with the cold acclimation response of S. involucrata. The full-length cDNA of one dehydrin-like gene, SiDHN, was obtained by RT-PCR and the SiDHN gene was further characterized in this study. The full-length SiDHN cDNA consists of 703 base pairs (bp) with a 333bp open reading frame encoding a protein comprising 111 amino acid residues...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167029/functional-characterization-of-the-bnnced3-gene-in-brassica-napus
#15
Peipei Xu, Weiming Cai
Abscisic acid (ABA) has been implicated in plant adaptation to various environmental stresses and the regulation of seed dormancy, leaf senescence and organ abscission progression. The cleavage of cis-epoxycarotenoids by 9-cis-epoxycarotenoid dioxygenase (NCED) family proteins is a critical step in the regulation of abscisic acid (ABA) synthesis in plants. In the present study, the NCED family gene BnNCED3 was isolated from Brassica napus. BnNCED3 encodes a 592-amino acid protein with high amino acid sequence similarity to the Arabidopsis AtNCED3 protein...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167028/salinity-induced-accumulation-of-endogenous-h2s-and-no-is-associated-with-modulation-of-the-antioxidant-and-redox-defense-systems-in-nicotiana-tabacum-l-cv-havana
#16
Cristiane Jovelina da Silva, Elizabeth Pacheco Batista Fontes, Luzia Valentina Modolo
Salinity is one of the abiotic factors that most affect crop growth and production. This study focused on the effect of high salinity on the endogenous levels of the signaling molecules hydrogen sulfite (H2S) and nitric oxide (NO) in Nicotiana tabacum leaves and the extent of these for the biochemically-driven plant tolerance to such abiotic stress. The NaCl treatment for 10days led to an expressive augment of H2S and NO levels. This increase was correlated with the raise of l-Cys and l-Arg and the induction of l-cysteine desulfhydrase, cyanoalanine synthase, cysteine synthase, nitrate reductase and arginase, enzymes known to be involved in the biosynthesis of H2S or NO...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167027/development-of-an-inducible-male-sterility-system-in-rice-through-pollen-specific-expression-of-l-ornithinase-arge-gene-of-e-coli
#17
Gundra Sivakrishna Rao, Akhilesh Kumar Tyagi, Khareedu Venkateswara Rao
In the present investigation, an inducible male-sterility system has been developed in the rice. In order to introduce inducible male-sterility, the coding region of l-ornithinase (argE) gene of E. coli was fused to the Oryza sativa indica pollen allergen (OSIPA) promoter sequence which is known to function specifically in the pollen grains. Transgenic plants were obtained with argE gene and the transgenic status of plants was confirmed by PCR and Southern blot analyses. RT-PCR analysis confirmed the tissue-specific expression of argE in the anthers of transgenic rice plants...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167026/drought-tolerant-qtl-qvdt11-leads-to-stable-tiller-formation-under-drought-stress-conditions-in-rice
#18
Tae-Heon Kim, Yeon-Jae Hur, Sang-Ik Han, Jun-Hyun Cho, Kyung-Min Kim, Jong-Hee Lee, You-Chun Song, Yeong-Up Kwon, Dongjin Shin
Drought is an important limiting factor for rice production, but the genetic mechanisms of drought tolerance is poorly understood. Here, we screened 218 rice varieties to identify 32 drought-tolerant varieties. The variety Samgang exhibited strong drought tolerance and stable yield in rain-fed conditions and was selected for further study. To identify QTLs for drought tolerance, we examined visual drought tolerance (VDT) and relative water content (RWC) phenotypes in a doubled haploid (DH) population of 101 individuals derived from a cross between Samgang and Nagdong (a drought-sensitive variety)...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167025/genome-editing-as-a-tool-to-achieve-the-crop-ideotype-and-de-novo-domestication-of-wild-relatives-case-study-in-tomato
#19
REVIEW
Agustin Zsögön, Tomas Cermak, Dan Voytas, Lázaro Eustáquio Pereira Peres
The ideotype is a theoretical model of an archetypal cultivated plant. Recent progress in genome editing is aiding the pursuit of this ideal in crop breeding. Breeding is relatively straightforward when the traits in question are monogenic in nature and show Mendelian inheritance. Conversely, traits with a diffuse, polygenic basis such as abiotic stress resistance are more difficult to harness. In recent years, many genes have been identified that are important for plant domestication and act by increasing yield, grain or fruit size or altering plant architecture...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167024/a-novel-ethylene-responsive-factor-citerf13-plays-a-role-in-photosynthesis-regulation
#20
Xiu-Lan Xie, Xiao-Jian Xia, Sheng Kuang, Xi-Li Zhang, Xue-Ren Yin, Jing-Quan Yu, Kun-Song Chen
Ethylene responsive factors (ERFs) act as critical downstream components of the ethylene signalling pathway in regulating plant development and stress responses. However little is known about its role in regulation of photosynthesis. Here, we identified an ethylene-inducible ERF gene in citrus, CitERF13. Transient over-expression of CitERF13 in N. tabacum leaves, resulted in a significant decrease in net photosynthetic rate. Closer examination of photosynthetic activity of PSII and PSI indicated that CitERF13 overexpression led to declines of Fv/Fm, Y(II) and Y(I)...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
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