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Journal of Plant Research

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https://www.readbyqxmd.com/read/28434121/intracellular-position-of-mitochondria-in-mesophyll-cells-differs-between-c3-and-c4-grasses
#1
Yuto Hatakeyama, Osamu Ueno
In C3 plants, part of the CO2 fixed during photosynthesis in chloroplasts is released from mitochondria during photorespiration by decarboxylation of glycine via glycine decarboxylase (GDC), thereby reducing photosynthetic efficiency. The apparent positioning of most mitochondria in the interior (vacuole side of chloroplasts) of mesophyll cells in C3 grasses would increase the efficiency of refixation of CO2 released from mitochondria by ribulose 1,5-bisphosphate carboxylase/​oxygenase (Rubisco) in chloroplasts...
April 22, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28424932/inverse-relationship-of-ca-2-dependent-flagellar-response-between-animal-sperm-and-prasinophyte-algae
#2
Kogiku Shiba, Kazuo Inaba
Symmetry/asymmetry conversion of eukaryotic flagellar waveform is caused by the changes in intracellular Ca(2+). Animal sperm flagella show symmetric or asymmetric waveform at lower or higher concentration of intracellular Ca(2+), respectively. In Chlamydomonas, high Ca(2+) induces conversion of flagellar waveform from asymmetric to symmetry, resulting in the backward movement. This mirror image relationship between animal sperm and Chlamydomonas could be explained by the distinct calcium sensors used to regulate the outer arm dyneins (Inaba 2015)...
April 19, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28421372/vascular-development-of-the-grapevine-vitis-vinifera-l-inflorescence-rachis-in-response-to-flower-number-plant-growth-regulators-and-defoliation
#3
Aude M Gourieroux, Bruno P Holzapfel, Margaret E McCully, Geoffrey R Scollary, Suzy Y Rogiers
The grapevine inflorescence is a determinate panicle and as buds emerge, shoot, flower and rachis development occur simultaneously. The growth and architecture of the rachis is determined by genetic and environmental factors but here we examined the role of flower and leaf number as well as hormones on its elongation and vascular development. The consequences of rachis morphology and vascular area on berry size and composition were also assessed. One week prior to anthesis, Merlot and Cabernet Sauvignon field vines were exposed to manual flower removal, exogenous plant growth regulators or pre-bloom leaf removal...
April 18, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28421371/temperature-dependent-signal-transmission-in-chloroplast-accumulation-response
#4
Takeshi Higa, Satoshi Hasegawa, Yoshio Hayasaki, Yutaka Kodama, Masamitsu Wada
Chloroplast photorelocation movement, well-characterized light-induced response found in various plant species from alga to higher plants, is an important phenomenon for plants to increase photosynthesis efficiency and avoid photodamage. The signal for chloroplast accumulation movement connecting the blue light receptor, phototropin, and chloroplasts remains to be identified, although the photoreceptors and the mechanism of movement via chloroplast actin filaments have now been revealed in land plants. The characteristics of the signal have been found; the speed of signal transfer is about 1 µm min(-1) and that the signal for the accumulation response has a longer life and is transferred a longer distance than that of the avoidance response...
April 18, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28401322/biomass-and-nutrient-allocation-strategies-in-a-desert-ecosystem-in-the-hexi-corridor-northwest-china
#5
Ke Zhang, YongZhong Su, Rong Yang
The allocation of biomass and nutrients in plants is a crucial factor in understanding the process of plant structures and dynamics to different environmental conditions. In this study, we present a comprehensive scaling analysis of data from a desert ecosystem to determine biomass and nutrient (carbon (C), nitrogen (N), and phosphorus (P)) allocation strategies of desert plants from 40 sites in the Hexi Corridor. We found that the biomass and levels of C, N, and P storage were higher in shoots than in roots...
April 11, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28396964/space-time-analysis-of-gravitropism-in-etiolated-arabidopsis-hypocotyls-using-bioluminescence-imaging-of-the-iaa19-promoter-fusion-with-a-destabilized-luciferase-reporter
#6
Kotaro T Yamamoto, Masaaki K Watahiki, Jun Matsuzaki, Soichirou Satoh, Hisayo Shimizu
Imaging analysis was carried out during the gravitropic response of etiolated Arabidopsis hypocotyls, using an IAA19 promoter fusion of destabilized luciferase as a probe. From the bright-field images we obtained the local deflection angle to the vertical, A, local curvature, C, and the partial derivative of C with respect to time, [Formula: see text]. These were determined every 19.9 µm along the curvilinear length of the hypocotyl, at ~10 min intervals over a period of ~6 h after turning hypocotyls through 90° to the horizontal...
April 10, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28396963/-fusion-in-fertilization-interdisciplinary-collaboration-among-plant-and-animal-scientists
#7
Katsuyuki T Yamato, Kazuyuki Kuchitsu
No abstract text is available yet for this article.
April 10, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28389925/plant-dehydrins-shedding-light-on-structure-and-expression-patterns-of-dehydrin-gene-family-in-barley
#8
Raha Abedini, Farzan GhaneGolmohammadi, Reihaneh PishkamRad, Ehsan Pourabed, Ahad Jafarnezhad, Zahra-Sadat Shobbar, Maryam Shahbazi
Dehydrins, an important group of late embryogenesis abundant proteins, accumulate in response to dehydration stresses and play protective roles under stress conditions. Herein, phylogenetic analysis of the dehydrin family was performed using the protein sequences of 108 dehydrins obtained from 14 plant species based on plant taxonomy and protein subclasses. Sub-cellular localization and phosphorylation sites of these proteins were also predicted. The protein features distinguishing these dehydrins categories were identified using various attribute weighting and decision tree analyses...
April 7, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28389924/greetings-from-the-new-editor-in-chief
#9
EDITORIAL
Kouki Hikosaka
No abstract text is available yet for this article.
April 7, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28389923/dispersal-of-remnant-endangered-trees-in-a-fragmented-and-disturbed-forest-by-frugivorous-birds
#10
Ning Li, Bing Bai, Xin-Hai Li, Shu-Qing An, Chang-Hu Lu
Most endangered plant species in a fragmented forest behave as a unique source population, with a high dependence on frugivorous birds for recruitment and persistence. In this study, we combined field data of dispersal behavior of birds and GIS information of patch attributes to estimate how frugivorous birds could affect the effective dispersal pattern of Chinese yew (Taxus chinensis) in a fragmented and disturbed forest. Nine bird species were observed to visit T. chinensis trees, with Urocissa erythrorhyncha, Zoothera dauma and Picus canus being the most common dispersers...
April 7, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28382528/diverse-origins-of-enzymes-involved-in-the-biosynthesis-of-chloroplast-peptidoglycan
#11
Naoki Sato, Hiroyoshi Takano
Chloroplasts are believed to be descendants of ancestral cyanobacteria that had peptidoglycan layer between the outer and the inner membranes. Historically, the glaucophyte Cyanophora paradoxa and the rhizopod Paulinella chromatophora were believed to harbor symbiotic cyanobacteria having peptidoglycan, which were conventionally named "cyanelles". In addition, the complete set of genes involved in the synthesis of peptidoglycan has been found in the moss Physcomitrella patens and some plants and algae. The presence of peptidoglycan-like structures was demonstrated by a new metabolic labeling technique in P...
April 5, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28378100/physiological-responses-of-three-soybean-species-glycine-soja-g-gracilis-and-g-max-cv-melrose-to-salinity-stress
#12
Haoran Liu, Jinhui Song, Lijun Dong, Di Wang, Shuling Zhang, Jianfeng Liu
Understanding the mechanism for salt tolerance in wild soybean (Glycine soja) can help researchers improve that trait in cultivated soybean lines. We analyzed the effects of excess NaCl on the growth, physiology, and ion distribution in three soybean species: wild G. soja (W8), semi-wild G. gracilis (SW18), and the cultivated salt-sensitive G. max (cv. Melrose). These comparisons revealed that, under salt stress, shoot and root lengths and biomass (either shoot or root dry weights) were significantly higher for the W8 genotype than for the other two...
April 4, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28364378/stoichiometry-in-aboveground-and-fine-roots-of-seriphidium-korovinii-in-desert-grassland-in-response-to-artificial-nitrogen-addition
#13
Lei Li, Xiaopeng Gao, Dongwei Gui, Bo Liu, Bo Zhang, Xiangyi Li
Nitrogen (N) input by atmospheric deposition and human activity enhances the availability of N in various ecosystems, which may further affect N and phosphorus (P) cycling and use by plants. However, the internal use of N, P, and N:P stoichiometry by plants in response to N supply, particularly for grass species in a desert steppe ecosystem, remains unclear. In this work, a field experiment was conducted at an infertile area in a desert steppe to investigate the effects of N fertilizer addition rates on the stoichiometry of N and P in a dominant grass species, Seriphidium korovinii...
March 31, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28364377/autophagy-programmed-cell-death-and-reactive-oxygen-species-in-sexual-reproduction-in-plants
#14
Takamitsu Kurusu, Kazuyuki Kuchitsu
Autophagy is one of the major cellular processes of recycling of proteins, metabolites and intracellular organelles, and plays crucial roles in the regulation of innate immunity, stress responses and programmed cell death (PCD) in many eukaryotes. It is also essential in development and sexual reproduction in many animals. In plants, although autophagy-deficient mutants of Arabidopsis thaliana show phenotypes in abiotic and biotic stress responses, their life cycle seems normal and thus little had been known until recently about the roles of autophagy in development and reproduction...
March 31, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28357612/the-tailored-sperm-cell
#15
Luis Alvarez
Sperm are ubiquitous and yet unique. Genes involved in sexual reproduction are more divergent than most genes expressed in non-reproductive tissues. It has been argued that sperm have been altered during evolution more than any somatic cell. Profound variations are found at the level of morphology, motility, search strategy for the egg, and the underlying signalling mechanisms. Sperm evolutionary adaptation may have arisen from sperm competition (sperm from rival males compete within the female's body to fertilize eggs), cryptic female choice (the female's ability to choose among different stored sperm), social cues tuning sperm quality or from the site of fertilization (internal vs...
March 29, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28342111/ckb1-is-involved-in-abscisic-acid-and-gibberellic-acid-signaling-to-regulate-stress-responses-in-arabidopsis-thaliana
#16
Congying Yuan, Jianping Ai, Hongping Chang, Wenjun Xiao, Lu Liu, Cheng Zhang, Zhuang He, Ji Huang, Jinyan Li, Xinhong Guo
Casein kinase II (CK2), an evolutionarily well-conserved Ser/Thr kinase, plays critical roles in all higher organisms including plants. CKB1 is a regulatory subunit beta of CK2. In this study, homozygous T-DNA mutants (ckb1-1 and ckb1-2) and over-expression plants (35S:CKB1-1, 35S:CKB1-2) of Arabidopsis thaliana were studied to understand the role of CKB1 in abiotic stress and gibberellic acid (GA) signaling. Histochemical staining showed that although CKB1 was expressed in all organs, it had a relatively higher expression in conducting tissues...
March 24, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28332056/allelopathic-interference-of-alfalfa-medicago-sativa-l-genotypes-to-annual-ryegrass-lolium-rigidum
#17
Hasan Muhammad Zubair, James E Pratley, G A Sandral, A Humphries
Alfalfa (Medicago sativa L.) genotypes at varying densities were investigated for allelopathic impact using annual ryegrass (Lolium rigidum) as the target species in a laboratory bioassay. Three densities (15, 30, and 50 seedlings/beaker) and 40 alfalfa genotypes were evaluated by the equal compartment agar method (ECAM). Alfalfa genotypes displayed a range of allelopathic interference in ryegrass seedlings, reducing root length from 5 to 65%. The growth of ryegrass decreased in response to increasing density of alfalfa seedlings...
March 22, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28324190/exogenous-application-of-urea-and-a-urease-inhibitor-improves-drought-stress-tolerance-in-maize-zea-mays-l
#18
Wei Gou, Pufan Zheng, Li Tian, Mei Gao, Lixin Zhang, Nudrat Aisha Akram, Muhammad Ashraf
Drought is believed to cause many metabolic changes which affect plant growth and development. However, it might be mitigated by various inorganic substances, such as nitrogen. Thus, the study was carried out to investigate the effect of foliar-applied urea with or without urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) on a maize cultivar under drought stress simulated by 15% (w/v) polyethylene glycol 6000. Foliar-applied urea resulted in a significant increase in plant dry weight, relative water content, and photosynthetic pigments under water stress condition...
March 21, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28315970/a-root-penetration-model-of-arabidopsis-thaliana-in-phytagel-medium-with-different-strength
#19
Jie Yan, Bochu Wang, Yong Zhou
Phytagel media were evaluated as systems to mechanically impede roots of A. thaliana. Studying mechanical properties of Phytagel and exploring the root response to mechanical stimulation can facilitate plant culture and plant development. Breaking strengths of 0.5-2.0% phytagel media were tested by uniaxial compression test. Different phytagel concentrations were set to alter the strength of layers in growth medium. Negative correlations were observed between root length, straightness and medium strength. When roots elongated through soft upper-layer (0...
March 18, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28303406/drought-induced-expression-of-aquaporin-genes-in-leaves-of-two-common-bean-cultivars-differing-in-tolerance-to-drought-stress
#20
Mateja Zupin, Aleš Sedlar, Marjetka Kidrič, Vladimir Meglič
Aquaporin proteins are part of the complex response of common bean (Phaseolus vulgaris L.) to drought which affects the quality and quantity of yield of this important crop. To better understand the role of aquaporins in common bean, drought-induced gene expression of several aquaporins was determined in two cultivars, the more drought tolerant Tiber and the less tolerant Starozagorski čern. The two bean cultivars were selected among 16 European genotypes based on the tolerance to drought determined by time needed for plants to wilt after withholding irrigation and yield at harvest...
March 16, 2017: Journal of Plant Research
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