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https://www.readbyqxmd.com/read/28643859/gibberellic-and-kaurenoic-hybrid-strigolactone-mimics-for-seed-germination-of-parasitic-weeds
#1
Rondinelle G Pereira, Antonio Cala, Mónica Fernández-Aparicio, José M G Molinillo, Maria A D Boaventura, Francisco A Macías
BACKGROUND: Parasitic weeds are widespread and they cause significant losses in important crops. Their germination requires the detection of crop-derived molecules such as strigolactones. Strigolactone mimics are germination-inducing molecules with potential to apply the suicidal germination strategy for seed bank control of parasitic weeds. RESULTS: Attachment of the D-ring, which is instrumental in the germination process of seeds of parasitic weeds, has been carried out to gibberellin (GA3 ) and kaurenoic as the scaffold...
June 23, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28637832/autophosphorylation-affects-substrate-binding-affinity-of-tobacco-ca2-dependent-protein-kinase1
#2
Takeshi Ito, Sarahmi Ishida, Shota Oe, Jutarou Fukazawa, Yohsuke Takahashi
Protein kinases regulate diverse physiological processes. Because many kinases preserve inherent autophosphorylation capability, autophosphorylation appears to be one of the most important mechanisms for cellular signaling. However, physiological functions of autophosphorylation are still largely unknown other than the self-activation by phosphorylation of activation loop in the catalytic domain. REPRESSION OF SHOOT GROWTH (RSG) is the transcription factor involved in gibberellin (GA) feedback regulation. The tobacco (Nicotiana tabacum) Ca2+-dependent protein kinase, NtCDPK1, phosphorylates RSG, resulting in the negative regulation of RSG...
June 21, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28631319/herbivory-induced-jasmonates-constrain-plant-sugar-accumulation-and-growth-by-antagonizing-gibberellin-signaling-and-not-by-promoting-secondary-metabolite-production
#3
Ricardo A R Machado, Ian T Baldwin, Matthias Erb
Plants respond to herbivory by reconfiguring hormonal networks, increasing secondary metabolite production and decreasing growth. Furthermore, some plants display a decrease in leaf energy reserves in the form of soluble sugars and starch, leading to the hypothesis that herbivory-induced secondary metabolite production and growth reduction may be linked through a carbohydrate-based resource trade-off. In order to test the above hypothesis, we measured leaf carbohydrates and plant growth in seven genetically engineered Nicotiana attenuata genotypes that are deficient in one or several major herbivore-induced, jasmonate-dependent defensive secondary metabolites and proteins...
July 2017: New Phytologist
https://www.readbyqxmd.com/read/28628670/combining-ability-heritability-and-genotypic-relations-of-different-physiological-traits-in-cacao-hybrids
#4
Allan Silva Pereira, Alex-Alan Furtado de Almeida, Márcia Christina da Silva Branco, Marcio Gilberto Cardoso Costa, Dario Ahnert
Selecting parents and evaluating progenies is a very important step in breeding programs and involves approaches such as understanding the initial stages of growth and characterizing the variability among genotypes for different parameters, such as physiological, growth, biomass partitioning and nutrient translocation to the aerial part. In these cases, facilitating tools can be used to understand the involved gene dynamics, such as diallel crosses and genetic and phenotypic correlations. Our main hypothesis is that the contrasting phenotypes of these parental genotypes of cocoa used are due to genetic factors, and progenies derived from crosses of these parental genotypes are useful for breeding programs related to plant architecture, physiological parameters and translocation of mineral nutrients...
2017: PloS One
https://www.readbyqxmd.com/read/28628628/transcriptional-mechanisms-associated-with-seed-dormancy-and-dormancy-loss-in-the-gibberellin-insensitive-sly1-2-mutant-of-arabidopsis-thaliana
#5
Sven K Nelson, Camille M Steber
While widespread transcriptome changes were previously observed with seed dormancy loss, this study specifically characterized transcriptional changes associated with the increased seed dormancy and dormancy loss of the gibberellin (GA) hormone-insensitive sleepy1-2 (sly1-2) mutant. The SLY1 gene encodes the F-box subunit of an SCF E3 ubiquitin ligase needed for GA-triggered proteolysis of DELLA repressors of seed germination. DELLA overaccumulation in sly1-2 seeds leads to increased dormancy that can be rescued without DELLA protein destruction either by overexpression of the GA receptor, GA-INSENSITIVE DWARF1b (GID1b-OE) (74% germination) or by extended dry after-ripening (11 months, 51% germination)...
2017: PloS One
https://www.readbyqxmd.com/read/28622672/physiological-effects-of-single-and-multi-walled-carbon-nanotubes-on-rice-seedlings
#6
Hao Zhang, Mengxia Yue, Xueke Zheng, Chengshen Xie, Hong Zhou, Lijia Li
In this paper, single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) were found to accelerate leaf growth and development of rice seedlings at a low concentration (20 mg/L), accompanied with the increased chlorophyll content and net photosynthetic rate (PN). Quantitative real-time polymerase chain reaction (RT-PCR) results indicated that both SWCNTs and MWCNTs significantly increased expression of genes associated with chloroplast development and cell sizes. Further analysis revealed that the abscisic acid (ABA) content decreased and the gibberellin (GA) content increased while the content of O2 and H2O2 was slightly elevated and the activities of antioxidative enzymes (SOD, EC 1...
June 14, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28618117/itraq-based-proteomics-of-sunflower-cultivars-differing-in-resistance-to-parasitic-weed-orobanche-cumana
#7
Chong Yang, Ling Xu, Na Zhang, Faisal Islam, Wenjian Song, Luyang Hu, Dan Liu, Xiaonan Xie, Weijun Zhou
Orobanche cumana is an obligate root parasite causing severe damage to many economically important crops, including sunflowers worldwide. For efficient control measures, it is necessary to understand the resistant mechanism during interaction at molecular level. The present study emphasizes on comparative proteomics to investigate the mechanistic basis of compatible and incompatible interaction of O. cumana with resistant (JY207) and susceptible (TK0409) sunflowers. More than 3500 proteins were identified from two cultivars by iTRAQ analysis...
June 15, 2017: Proteomics
https://www.readbyqxmd.com/read/28616192/sex-specific-floral-morphology-biomass-and-phytohormones-associated-with-altitude-in-dioecious-populus-cathayana-populations
#8
Jundong He, Tingfa Dong, Kechao Huang, Yanxia Yang, Dadong Li, Xiao Xu, Xinhua He
Relationships between sex-specific floral traits and endogenous phytohormones associated with altitude are unknown particularly in dioecious trees. We thus examined the relationships between floral morphology or biomass and phytohormones in male and female flowers of dioecious Populus cathayana populations along an altitudinal gradient (1,500, 1,600, and 1,700 m above sea level) in the Xiaowutai Nature Reserve in northern China. The female and male flowers had the most stigma and pollen at 1,700 m, the largest ovaries and least pollen at 1,500 m, and the smallest ovaries and greater numbers of anthers at 1,600 m altitude...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28614407/genome-wide-identification-and-characterization-of-micrornas-differentially-expressed-in-fibers-in-a-cotton-phytochrome-a1-rnai-line
#9
Qing Miao, Peng Deng, Sukumar Saha, Johnie N Jenkins, Chuan-Yu Hsu, Ibrokhim Y Abdurakhmonov, Zabardast T Buriev, Alan Pepper, Din-Pow Ma
Cotton fiber is an important commodity throughout the world. Fiber property determines fiber quality and commercial values. Previous studies showed that silencing phytochrome A1 gene (PHYA1) by RNA interference in Upland cotton (Gossypium hirsutum L. cv. Coker 312) had generated PHYA1 RNAi lines with simultaneous improvements in fiber quality (longer, stronger and finer fiber) and other key agronomic traits. Characterization of the altered molecular processes in these RNAi genotypes and its wild-type controls is a great interest to better understand the PHYA1 RNAi phenotypes...
2017: PloS One
https://www.readbyqxmd.com/read/28611805/transcriptomic-analysis-in-strawberry-fruits-reveals-active-auxin-biosynthesis-and-signaling-in-the-ripe-receptacle
#10
Elizabeth Estrada-Johnson, Fabiana Csukasi, Carmen M Pizarro, José G Vallarino, Yulia Kiryakova, Amalia Vioque, Javier Brumos, Nieves Medina-Escobar, Miguel A Botella, José M Alonso, Alisdair R Fernie, José F Sánchez-Sevilla, Sonia Osorio, Victoriano Valpuesta
The role of auxin in ripening strawberry (Fragaria ×ananassa) fruits has been restricted to the early stages of development where the growth of the receptacle is dependent on the delivery of auxin from the achenes. At later stages, during enlargement of the receptacle, other hormones have been demonstrated to participate to different degrees, from the general involvement of gibberellins and abscisic acid to the more specific of ethylene. Here we report the involvement of auxin at the late stages of receptacle ripening...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28611800/small-rna-sequencing-links-physiological-changes-and-rddm-process-to-vegetative-to-floral-transition-in-apple
#11
Xinwei Guo, Zeyang Ma, Zhonghui Zhang, Lailiang Cheng, Xiuren Zhang, Tianhong Li
Transition from vegetative to floral buds is a critical physiological change during flower induction that determines fruit productivity. Small non-coding RNAs (sRNAs) including microRNAs (miRNAs) and small interfering RNAs (siRNAs) are pivotal regulators of plant growth and development. Although the key role of sRNAs in flowering regulation has been well-described in Arabidopsis and some other annual plants, their relevance to vegetative-to-floral transition (hereafter, referred to floral transition) in perennial woody trees remains under defined...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28611799/endophytic-paecilomyces-formosus-lhl10-augments-glycine-max-l-adaptation-to-ni-contamination-through-affecting-endogenous-phytohormones-and-oxidative-stress
#12
Saqib Bilal, Abdul L Khan, Raheem Shahzad, Sajjad Asaf, Sang-Mo Kang, In-Jung Lee
This study investigated the Ni-removal efficiency of phytohormone-producing endophytic fungi Penicillium janthinellum, Paecilomyces formosus, Exophiala sp., and Preussia sp. Among four different endophytes, P. formosus LHL10 was able to tolerate up to 1 mM Ni in contaminated media as compared to copper and cadmium. P. formosus LHL10 was further assessed for its potential to enhance the phytoremediation of Glycine max (soybean) in response to dose-dependent increases in soil Ni (0.5, 1.0, and 5.0 mM). Inoculation with P...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28607067/a-recruiting-protein-of-geranylgeranyl-diphosphate-synthase-controls-metabolic-flux-toward-chlorophyll-biosynthesis-in-rice
#13
Fei Zhou, Cheng-Yuan Wang, Michael Gutensohn, Ling Jiang, Peng Zhang, Dabing Zhang, Natalia Dudareva, Shan Lu
In plants, geranylgeranyl diphosphate (GGPP) is produced by plastidic GGPP synthase (GGPPS) and serves as a precursor for vital metabolic branches, including chlorophyll, carotenoid, and gibberellin biosynthesis. However, molecular mechanisms regulating GGPP allocation among these biosynthetic pathways localized in the same subcellular compartment are largely unknown. We found that rice contains only one functionally active GGPPS, OsGGPPS1, in chloroplasts. A functionally active homodimeric enzyme composed of two OsGGPPS1 subunits is located in the stroma...
June 12, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28604820/comparative-transcriptome-analysis-provides-insights-into-molecular-mechanisms-for-parthenocarpic-fruit-development-in-eggplant-solanum-melongena-l
#14
Xia Chen, Min Zhang, Jie Tan, Shuping Huang, Chunli Wang, Hongyuan Zhang, Taiming Tan
Genetic control of parthenocarpy, a desirable trait in edible fruit with hard seeds, has been extensively studied. However, the molecular mechanism of parthenocarpic fruit development in eggplant (Solanum melongena L.) is still unclear. To provide insights into eggplant parthenocarpy, the transcriptomic profiles of a natural parthenocarpic (PP05) and two non-parthenocarpic (PnP05 and GnP05) eggplant lines were analyzed using RNA-sequencing (RNA-seq) technology. These sequences were assembled into 38925 unigenes, of which 22683 had an annotated function and 3419 were predicted as novel genes or from alternative splicing...
2017: PloS One
https://www.readbyqxmd.com/read/28604637/gibberellic-acid-signaling-is-required-to-induce-flowering-of-chrysanthemums-grown-under-both-short-and-long-days
#15
Bin Dong, Ye Deng, Haibin Wang, Ri Gao, Githeng'u K Stephen, Sumei Chen, Jiafu Jiang, Fadi Chen
Flower bud formation and flowering in chrysanthemums occur under short day conditions (SD), but the molecular basis for the switch to reproductive growth is less well understood than in model plants. Here, a spontaneous mutant able to flower under long days is described. In an attempt to reveal the pathway(s) involved in the formation of flower buds under contrasting daylengths, transcriptome sequencing was carried out in plants grown both under SD and long day conditions (LD). A number of differentially transcribed genes involved in the various known flowering pathways were identified...
June 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28603533/transcriptome-analysis-reveals-differential-gene-expression-and-a-possible-role-of-gibberellins-in-a-shade-tolerant-mutant-of-perennial-ryegrass
#16
Wei Li, Lorenzo Katin-Grazzini, Xianbin Gu, Xiaojing Wang, Rania El-Tanbouly, Huseyin Yer, Chandra Thammina, John Inguagiato, Karl Guillard, Richard J McAvoy, Jill Wegrzyn, Tingting Gu, Yi Li
The molecular basis behind shade tolerance in plants is not fully understood. Previously, we have shown that a connection may exist between shade tolerance and dwarfism, however, the mechanism connecting these phenotypes is not well understood. In order to clarify this connection, we analyzed the transcriptome of a previously identified shade-tolerant mutant of perennial ryegrass (Lolium perenne L.) called shadow-1. shadow-1 mutant plants are dwarf, and are significantly tolerant to shade in a number of environments compared to wild-type controls...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28603082/regulation-and-physiological-role-of-silicon-in-alleviating-drought-stress-of-mango
#17
Mohamed Naser Helaly, Hanan El-Hoseiny, Nabil Ibrahim El-Sheery, Anshu Rastogi, Hazem M Kalaji
Improvement of drought stress of mango plants requires intensive research that focuses on physiological processes. In three successive seasons (2014, 2015and 2016) field experiments with four different strains of mango were subjected to two water regimes. The growth and physiological parameters of possible relevance for drought stress tolerances in mango were investigated. Yield and its components were also evaluated. The data showed that all growth and physiological parameters were increased under K2SiO3 (Si) supplement and were followed by the interaction treatment (Si treatment and its combination with drought stress) compared to that of the controlled condition...
June 3, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28596775/abnormal-endogenous-repression-of-ga-signaling-in-a-seedless-table-grape-cultivar-with-high-berry-growth-response-to-ga-application
#18
Atiako K Acheampong, Chuanlin Zheng, Tamar Halaly, Lisa Giacomelli, Yumiko Takebayashi, Yusuke Jikumaru, Yuji Kamiya, Amnon Lichter, Etti Or
Gibberellin (GA) application is routinely used in the table grape industry to increase berry size and cluster length. Although grapevine cultivars show a wide range of growth responsiveness to GA3 application, the reasons for these differences is unclear. To shed light on this issue, two commercial grapevine cultivars with contrasting berry response to GA were selected for comparative analysis, in which we tested if the differences in response: (1) is organ-specific or cultivar-related; (2) will be reflected in qualitative/quantitative differences in transcripts/proteins of central components of GA metabolism and signaling and levels of GA metabolites...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28592854/transcriptomic-analysis-of-short-fruit-1-sf1-reveals-new-insights-into-the-variation-of-fruit-related-traits-in-cucumis-sativus
#19
Lina Wang, Chenxing Cao, Shuangshuang Zheng, Haiyang Zhang, Panjing Liu, Qian Ge, Jinrui Li, Zhonghai Ren
Fruit size is an important quality trait in different market classes of Cucumis sativus L., an economically important vegetable cultivated worldwide, but the genetic and molecular mechanisms that control fruit size are largely unknown. In this study, we isolated a natural cucumber mutant, short fruit 1 (sf1), caused by a single recessive Mendelian factor, from the North China-type inbred line CNS2. In addition to significantly decreased fruit length, other fruit-related phenotypic variations were also observed in sf1 compared to the wild-type (WT) phenotype, indicating that sf1 might have pleiotropic effects...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28591805/two-della-interacting-proteins-bhlh48-and-bhlh60-regulate-flowering-under-long-day-conditions-in-arabidopsis-thaliana
#20
Yang Li, Houping Wang, Xiaoli Li, Gang Liang, Diqiu Yu
Gibberellin (GA) regulates many developmental transitions in the plant life cycle. Although great progress has been made, the GA signaling pathways have not been fully elucidated. Identifying and characterizing new targets of DELLA proteins is an effective approach to reveal the complicated GA signaling networks. In this study, two novel DELLA-interacting transcription factors, bHLH48 and bHLH60, were identified. Their overexpression caused plants to flower early under long-day conditions, whereas their functional repression resulted in the opposite result...
June 7, 2017: Journal of Experimental Botany
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