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Plant Science: An International Journal of Experimental Plant Biology

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https://www.readbyqxmd.com/read/30471734/lsi1-modulates-the-antioxidant-capacity-of-rice-and-protects-against-ultraviolet-b-radiation
#1
Changxun Fang, Lanlan Li, Pengli Zhang, Dahong Wang, Luke Yang, Boorboori Mohammad Reza, Wenxiong Lin
Silicon (Si) enhances the resistance of rice to biotic and abiotic stress. In rice, the accumulation of Si is controlled by the low silicon rice 1 (Lsi1) gene; overexpression of Lsi1 (Lsi1-OX) increases Si uptake and accumulation, while the reverse is observed in Lsi1-RNA interference (Lsi1-RNAi) transgenic rice. When the two transgenic rice lines and wild-type (WT) rice were exposed to ultraviolet (UV)-B radiation, the Lsi1-OX or Lsi1-RNAi rice showed differential microRNA (miRNA) expression, compared to WT rice...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471733/identification-and-characterization-of-a-pyridoxal-5-phosphate-phosphatase-in-tobacco-plants
#2
Huang ShuoHao, Liu Jing, Zhou Jie, Zhang JianYun, Huang LongQuan
Pyridoxal 5'-phosphate (PLP), the catalytically active form of vitamin B6 , is an important cofactor for many biochemical transformations. PLP is also a very reactive molecule, and the most well-established mechanism for maintaining low levels of free PLP is its dephosphorylation by phosphatases. In our previous study, the crude enzyme extract from tobacco leaves rapidly hydrolyzed PLP at a pH optimum of 5.5. Using PLP as a substrate, a novel acid phosphatase was purified from tobacco leaves and characterized...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471732/physiological-role-of-%C3%AE-carotene-monohydroxylase-cyp97h1-in-carotenoid-biosynthesis-in-euglena-gracilis
#3
Shun Tamaki, Shota Kato, Tomoko Shinomura, Takahiro Ishikawa, Hiromasa Imaishi
Some carotenoids are found in the Euglena gracilis, including β-carotene, diadinoxanthin, diatoxanthins, and neoxanthin as the major species; however, the molecular mechanism underlying carotenoid biosynthesis in E. gracilis is not well understood. To clarify the pathway and regulation of carotenoid biosynthesis in this alga, we functionally characterized the cytochrome P450 (CYP)-type carotene hydroxylase gene EgCYP97H1. Heterologous in vivo enzyme assay in E. coli indicated that EgCYP97H1 hydroxylated β-carotene to β-cryptoxanthin...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471731/the-involvement-of-cytokinin-and-nitrogen-metabolism-in-delayed-flag-leaf-senescence-in-a-wheat-stay-green-mutant-tasg1
#4
Wenqiang Wang, Qunqun Hao, Wenlong Wang, Qinxue Li, Fengjuan Chen, Fei Ni, Yong Wang, Daolin Fu, Jiajie Wu, Wei Wang
In the present study on a wheat stay-green mutant, tasg1, we found that its delayed senescence at the late filling stage was related to the high cytokinin (CK) and N contents. RNA sequencing suggested that several genes may be responsible for the different senescence processes between wild-type (WT) and tasg1 plants. WT and tasg1 seedlings were treated with NH4 NO3 , lovastatin, and 6-benzylaminopurine (BAP), and the results suggested that the feedback of CK with N content regulated the leaf senescence in the tasg1 plants...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471730/morf2-tightly-associates-with-morf9-to-regulate-chloroplast-rna-editing-in-arabidopsis
#5
Chao Huang, Zi-Ran Li, Qing-Bo Yu, Lin-Shan Ye, Yong-Lan Cui, David P Molloy, Zhong-Nan Yang
RNA editing in chloroplasts and mitochondria is performed by hypothetical editosomes. The MORF family proteins are essential components of these editosomes. In Arabidopsis, MORF2 and MORF9 are involved in the editing of most sites in chloroplasts. In this work, we performed immunoprecipitation and mass spectrometry assays of transgenic lines expressing MORF2-4xMYC and MORF9-4xMYC to identify interacting proteins. We found that MORF2 and MORF9 are present in the same complex. Blue-Native PAGE analysis of chloroplast protein complexes also revealed that both MORF2 and MORF9 are part of a complex of approximately 140 kDa, suggesting the existence of tight MORF2-MORF9 interaction in chloroplasts...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471729/functional-screening-of-salt-tolerance-genes-from-a-halophyte-sporobolus-virginicus-and-transcriptomic-and-metabolomic-analysis-of-salt-tolerant-plants-expressing-glycine-rich-rna-binding-protein
#6
Yuichi Tada, Ryuichi Kawano, Shiho Komatsubara, Hideki Nishimura, Maki Katsuhara, Soichi Ozaki, Shin Terashima, Kentaro Yano, Chisato Endo, Muneo Sato, Mami Okamoto, Yuji Sawada, Masami Yokota Hirai, Takamitsu Kurusu
Sporobolus virginicus is a halophytic C4 grass found worldwide, from tropical to warm temperate regions. One Japanese genotype showed a salinity tolerance up to 1.5 M NaCl, a three-fold higher concentration than the salinity of sea water. To identify the key genes involved in the regulation of salt tolerance in S. virginicus, we produced 3500 independent transgenic Arabidopsis lines expressing random cDNA from S. virginicus and screened 10 lines which showed enhanced salt tolerance compared with the wild type in a medium containing 150 mM NaCl...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471728/ionizing-radiation-manifesting-dna-damage-response-in-plants-an-overview-of-dna-damage-signaling-and-repair-mechanisms-in-plants
#7
REVIEW
Jin-Hong Kim, Tae Ho Ryu, Seung Sik Lee, Sungbeom Lee, Byung Yeoup Chung
Plants orchestrate various DNA damage responses (DDRs) to overcome the deleterious impacts of genotoxic agents on genetic materials. Ionizing radiation (IR) is widely used as a potent genotoxic agent in plant DDR research as well as plant breeding and quarantine services for commercial uses. This review aimed to highlight the recent advances in cellular and phenotypic DDRs, especially those induced by IR. Various physicochemical genotoxic agents damage DNA directly or indirectly by inhibiting DNA replication...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471727/transcriptomic-and-physiological-analyses-reveal-drought-adaptation-strategies-in-drought-tolerant-and-susceptible-watermelon-genotypes
#8
Hao Li, YanLing Mo, Qi Cui, XiaoZhen Yang, YanLiang Guo, ChunHua Wei, Jianqiang Yang, Yong Zhang, JianXiang Ma, Xian Zhang
Drought stress has become one of the most urgent environmental hazards for horticultural crops. In this research, we analyzed watermelon adaptation strategies to drought stress in drought-tolerant (M20) and -susceptible (Y34) genotypes via transcriptomic and physiological analyses. After drought stress, a total of 6228 and 4311 differentially expressed genes (DEGs) were observed in Y34 and M20, respectively. Numerous DEGs were involved in various defense responses such as antioxidation, protein protection, osmotic adjustment, wax accumulation, hormone signaling, and melatonin biosynthesis...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471726/a-dreb1-gene-from-zoysiagrass-enhances-arabidopsis-tolerance-to-temperature-stresses-without-growth-inhibition
#9
Wanqian Feng, Jing Li, Sixin Long, Shanjun Wei
The DREB (dehydration-responsive element binding) protein family comprises transcription factors that can increase the survivability of a plant under abiotic stresses by regulating expression of multiple genes and altering downstream metabolism at the cost of growth retardation and developmental delay. In this study, a gene for the DREB1-type transcription factor, designated ZjDREB1.4, was isolated from zoysiagrass (Zoysia japonica Steud.), a popular warm-season turfgrass. This gene contains a conserved AP2/ERF DNA-binding domain flanking the signature sequence of DREB1 and belongs to a DREB1 branch in the grass family that expands in the warm-season species...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471725/a-hd-zip-ii-homebox-transcription-factor-pphb-g7-mediates-ethylene-biosynthesis-during-fruit-ripening-in-peach
#10
Chao Gu, Zhi-Hua Guo, Hai-Yan Cheng, Yu-Hang Zhou, Kai-Jie Qi, Guo-Ming Wang, Shao-Ling Zhang
Homeobox transcription factors belong to a superfamily that has been widely studied in plant growth and development, but little is known regarding their role in fruit development and ripening. Using a genome-wide expression analysis of homeobox (HB) genes and quantitative real-time PCR, a HD-ZIP II member, PpHB.G7, which presented higher levels of expression in ripening fruits than in developing fruits in all of the tested cultivars, was isolated from peach. Transient transformations showed that PpHB.G7 affects ethylene production and the expression of ethylene biosynthesis genes (PpACS1 and PpACO1)...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471724/mini-review-revisiting-mobile-rna-silencing-in-plants
#11
REVIEW
Xian Zhang, Tongfei Lai, Pengcheng Zhang, Xinlian Zhang, Chen Yuan, Zhenhui Jin, Hongmei Li, Zhiming Yu, Cheng Qin, Mahmut Tör, Ping Ma, Qi Cheng, Yiguo Hong
Non-cell autonomous RNA silencing can spread from cell to cell and over long-distances in animals and plants. This process is genetically determined and requires mobile RNA signals. Genetic requirement and molecular nature of the mobile signals for non-cell-autonomous RNA silencing were intensively investigated in past few decades. No consensus dogma for mobile silencing can be reached in plants, yet published data are sometimes inconsistent and controversial. Thus, the genetic requirements and molecular signals involved in plant mobile silencing are still poorly understood...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471723/visualization-of-soluble-carbohydrate-distribution-in-apple-fruit-flesh-utilizing-maldi-tof-ms-imaging
#12
Kentaro Horikawa, Takuya Hirama, Hanako Shimura, Yutaka Jitsuyama, Takashi Suzuki
To confirm availability of Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry imaging (MSI) for visualizing distribution of soluble carbohydrates in apple (Malus domestica) fruits a horizontal fruit flesh specimen was cut from a matured 'Fuji' fruit, mounted on a glass slide, lyophilized and then ion intensities of individual soluble carbohydrates were probed around the specimen using a MALDI-TOF MSI apparatus automatically. Contents of soluble carbohydrates in adjacent tissue of the same fruit were also determined using HPLC to compare the distribution of individual carbohydrate based on the ion intensities from MALDI-TOF MSI with those from HPLC...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30471722/nitrogen-improved-photosynthesis-quantum-yield-is-driven-by-increased-thylakoid-density-enhancing-green-light-absorption
#13
Thaise Moriwaki, Renan Falcioni, Francisco André Ossamu Tanaka, Kátia Aparecida Kern Cardoso, L A Souza, Evanilde Benedito, Marcos Rafael Nanni, Carlos Moacir Bonato, Werner Camargos Antunes
A nitrogen supply is necessary for all plants. The multifaceted reasons why this nutrient stimulates plant dry weight accumulation are assessed herein. We compared tomato plants grown in full sunlight and in low light environments under four N doses and evaluated plant growth, photosynthetic and calorimetric parameters, leaf anatomy, chloroplast transmission electron microscopy (TEM) and a high resolution profile of optical leaf properties. Increases in N supplies allow tomato plants to grow faster in low light environments (91...
January 2019: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466604/floury-endosperm11-encoding-a-plastid-heat-shock-protein-70-is-essential-for-amyloplast-development-in-rice
#14
Xiaopin Zhu, Xuan Teng, Yunlong Wang, Yuanyuan Hao, Ruonan Jing, Yongfei Wang, Yi Liu, Jianping Zhu, Mingming Wu, Mingsheng Zhong, Xiaoli Chen, Yuanyan Zhang, Wenwei Zhang, Chunming Wang, Yihua Wang, Jianmin Wan
Mutations of stromal Hsp70 cause chloroplast developmental abnormalities and knockout mutants of stromal Hsp70 usually exhibit protein import deficiencies. However, their effects have not been studied in amyloplast development. Here, we identified an amyloplast abnormal development mutant, floury endosperm11 (flo11) that exhibited an opaque phenotype in the inner core and the periphery of grains. Semi-thin section revealed defective amyloplast development in the flo11 endosperm. Map-based cloning and subsequent complementation test demonstrated that FLO11 encoded a plastid-localized heat shock protein 70 (OsHsp70cp-2)...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466603/review-functional-linkages-between-amino-acid-transporters-and-plant-responses-to-pathogens
#15
REVIEW
Unnati Sonawala, Kasia Dinkeloo, Cristian H Danna, John M McDowell, Guillaume Pilot
Upon infection, plant pathogens become dependent on their hosts for nutrition. Therefore, the interaction between the two organisms is tightly linked to the availability and flux of nutrients in the plant. The plant's nitrogen metabolism is reprogrammed during pathogen attack, likely reflecting plant's response to invasion by the pathogen and active modification by the pathogen to promote feeding. Several lines of evidence indicate that plant-derived amino acids are an important source of nitrogen for diverse pathogens...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466602/highlighting-type-a-rrs-as-potential-regulators-of-the-dkhk1-multi-step-phosphorelay-pathway-in-populus
#16
F Chefdor, F Héricourt, K Koudounas, I Carqueijeiro, V Courdavault, F Mascagni, L Bertheau, M Larcher, C Depierreux, F Lamblin, M L Racchi, S Carpin
In previous studies, we highlighted a multistep phosphorelay (MSP) system in poplars composed of two hybrid-type Histidine aspartate Kinases, dkHK1a and dkHK1b, which interact with three Histidine Phosphotransfer proteins, dkHPt2, 7, and 9, which in turn interact with six type B Response Regulators. These interactions correspond to the dkHK1a-b/dkHPts/dkRRBs MSP. This MSP is putatively involved in an osmosensing pathway, as dkHK1a-b are orthologous to the Arabidopsis osmosensor AHK1, and able to complement a mutant yeast deleted for its osmosensors...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466601/a-novel-cysteine-rich-peptide-regulates-cell-expansion-in-the-tobacco-pistil-and-influences-its-final-size
#17
Michael S Brito, Henrique C DePaoli, Viviani Cossalter, Nilton C Avanci, Pedro B Ferreira, Mariana S Azevedo, Edward J Strini, Andréa C Quiapim, Gustavo H Goldman, Lázaro E P Peres, Maria Helena S Goldman
Plant morphogenesis is dependent on cell proliferation and cell expansion, which are responsible for establishing final organ size and shape during development. Several genes have been described as encoding components of the plant cell development machinery, among which are the plant peptides. Here we describe a novel cysteine-rich plant peptide (68 amino acids), encoded by a small open reading frame gene (sORF). It is specifically expressed in the reproductive organs of Nicotiana tabacum and is developmentally regulated...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466600/the-gdp-mannose-transporter-gene-dogmt-from-dendrobium-officinale-is-critical-for-mannan-biosynthesis-in-plant-growth-and-development
#18
Zhenming Yu, Chunmei He, Jaime A Teixeira da Silva, Jianping Luo, Ziyin Yang, Jun Duan
Dendrobium officinale is a precious traditional Chinese medicinal herb because it is abundant in mannose-containing polysaccharides (MCPs). GDP-mannose transporter (GMT), which translocates GDP-mannose into the Golgi lumen, is indispensable for the biosynthesis of MCPs. In this study, we found that the dominant polysaccharides in D. officinale were MCPs in a range of varieties and different physiological phases. After a positive correlation between the accumulation of mannose and the transcript levels of candidate GMT genes was found, three GMT genes (DoGMT1-3) were identified in D...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466599/citrus-sinensis-myb-transcription-factors-csmyb330-and-csmyb308-regulate-fruit-juice-sac-lignification-through-fine-tuning-expression-of-the-cs4cl1-gene
#19
Ning Jia, Jiqin Liu, Yufeng Sun, Penghui Tan, Hao Cao, Yingying Xie, Boting Wen, Tianyi Gu, Jiameng Liu, Minmin Li, Yatao Huang, Jia Lu, Nuo Jin, Lichao Sun, Fengjiao Xin, Bei Fan
Lignin is one of the most important components of the plant cell wall, and the expression and transcriptional regulation of lignin biosynthesis-related genes have been studied widely in Arabidopsis and other plants. Citrus fruit juice sacs often undergo lignification, particularly during fruit ripening and storage periods; however, the underlying genetic mechanisms have been little investigated. In this study, we isolated and identified CsMYB330 and CsMYB308 transcription factors, and found that their expression levels are significantly altered during the lignification of citrus fruit juice sacs...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30466598/the-arabidopsis-dwarf27-gene-encodes-an-all-trans-9-cis-%C3%AE-carotene-isomerase-and-is-induced-by-auxin-abscisic-acid-and-phosphate-deficiency
#20
Haneen Abuauf, Imran Haider, Kun-Peng Jia, Abdugaffor Ablazov, Jianing Mi, Ikram Blilou, Salim Al-Babili
Strigolactones (SLs) are carotenoid-derived plant hormones that influence various aspects of plant growth and development in response to environmental conditions, especially nutrients deficiency. SLs are synthesized via a strict stereo-specific core pathway that leads to the intermediate carlactone, requiring the iron-containing polypeptide DWARF27 (D27) and the carotenoid cleavage dioxygenases 7 (CCD7) and 8 (CCD8). It has been shown that the rice OsD27 is a β-carotene isomerase catalyzing the interconversion of all-trans- into 9-cis-β -carotene...
December 2018: Plant Science: An International Journal of Experimental Plant Biology
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