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Bud dormancy

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https://www.readbyqxmd.com/read/28881277/functional-identification-of-mdpif1-as-a-phytochrome-interacting-factor-in-apple
#1
Li-Jie Zhou, Ke Mao, Yu Qiao, Han Jiang, Yuan-Yuan Li, Yu-Jin Hao
Light plays a central role in regulating both apple plant yield and fruit quality formation; however, the Phytochrome interacting factors (PIFs), which are the main components of Phytochrome-mediated light signal transduction in apple, have rarely been characterized. Here, we isolated and identified a PIF-like protein(MdPIF1) in apple, which is similar to AtPIF1. MdPIF1 was constitutively expressed at different levels in various apple tissues, and the transcription level of MdPIF1 was significantly induced during seed germination...
August 31, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28869799/trehalose-6-phosphate-is-involved-in-triggering-axillary-bud-outgrowth-in-garden-pea-pisum-sativum-l
#2
Franziska Fichtner, Francois F Barbier, Regina Feil, Mutsumi Watanabe, Maria Grazia Annunziata, Tinashe G Chabikwa, Rainer Höfgen, Mark Stitt, Christine A Beveridge, John E Lunn
Trehalose 6-phosphate (Tre6P) is a signal of sucrose availability in plants, and has been implicated in regulation of shoot branching by the abnormal branching phenotypes of Arabidopsis (Arabidopsis thaliana) and maize (Zea mays) mutants with altered Tre6P metabolism. Decapitation of garden pea (Pisum sativum) plants has been proposed to release the dormancy of axillary buds lower down the stem due to changes in sucrose supply, and we hypothesized that this response is mediated by Tre6P. Decapitation led to a rapid and sustained rise in Tre6P levels in axillary buds, coinciding with the onset of bud outgrowth...
September 4, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28854897/expression-patterns-of-flowering-genes-in-leaves-of-pineapple-sweet-orange-citrus-sinensis-l-osbeck-and-pummelo-citrus-grandis-osbeck
#3
Melanie Pajon, Vicente J Febres, Gloria A Moore
BACKGROUND: In citrus the transition from juvenility to mature phase is marked by the capability of a tree to flower and fruit consistently. The long period of juvenility in citrus severely impedes the use of genetic based strategies to improve fruit quality, disease resistance, and responses to abiotic environmental factors. One of the genes whose expression signals flower development in many plant species is FLOWERING LOCUS T (FT). RESULTS: In this study, gene expression levels of flowering genes CiFT1, CiFT2 and CiFT3 were determined using reverse-transcription quantitative real-time PCR in citrus trees over a 1 year period in Florida...
August 30, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28810288/overexpression-of-demeter-a-dna-demethylase-promotes-early-apical-bud-maturation-in-poplar
#4
Daniel Conde, Alicia Moreno-Cortés, Christopher Dervinis, José M Ramos-Sánchez, Matias Kirst, Mariano Perales, Pablo González-Melendi, Isabel Allona
The transition from active growth to dormancy is critical for the survival of perennial plants. We identified a DEMETER-like (CsDML) cDNA from a winter-enriched cDNA subtractive library in chestnut (Castanea sativa Mill.), an economically and ecologically important species. Next, we characterized this DNA demethylase and its putative orthologue in the more experimentally tractable hybrid poplar (Populus tremula x alba), under the signals that trigger bud dormancy in trees. We performed phylogenetic and protein sequence analysis, gene expression profiling and 5mC immunodetection studies to evaluate the role of CsDML and its homologue in poplar, PtaDML6...
August 15, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28769948/transcriptome-and-metabolite-changes-during-hydrogen-cyanamide-induced-floral-bud-break-in-sweet-cherry
#5
Irina A Ionescu, Gregorio López-Ortega, Meike Burow, Almudena Bayo-Canha, Alexander Junge, Oliver Gericke, Birger L Møller, Raquel Sánchez-Pérez
Release of bud dormancy in perennial woody plants is a temperature-dependent process and thus flowering in these species is heavily affected by climate change. The lack of cold winters in temperate growing regions often results in reduced flowering and low fruit yields. This is likely to decrease the availability of fruits and nuts of the Prunus spp. in the near future. In order to maintain high yields, it is crucial to gain detailed knowledge on the molecular mechanisms controlling the release of bud dormancy...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28763987/changes-in-ros-production-and-antioxidant-capacity-during-tuber-sprouting-in-potato
#6
Bailin Liu, Shuo Zhao, Fei Tan, Hua Zhao, DongDong Wang, Huaijun Si, Qin Chen
Potato dormancy is a complex process with an extensive release phase. This study investigated involvement of reactive oxygen species during tuber dormancy release. We found that tuber sprouting was delayed by treatment with diphenylene iodonium chloride, an NADPH oxidase inhibitor; NADPH oxidase catalyze the production of ROS. In situ ROS localization and ROS content estimation revealed that dormancy release was associated with an accumulation of superoxide anion and hydrogen peroxide in tuber buds. The antioxidant compounds and enzymes display important changes during the progression of dormancy...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28759789/changes-in-carbohydrate-levels-and-relative-water-content-rwc-to-distinguish-dormancy-phases-in-sweet-cherry
#7
Heiko Kaufmann, Michael Blanke
Perennial trees require chilling, i.e. a period of cold temperature in the winter, for flowering next spring; sweet cherry is particularly prone to lack of chilling. The objective of this study is to identify possible transition points to clearly distinguish dormancy phases by relating carbohydrate and relative water content (RWC) in reproductive buds to concomitant chilling fulfilment. This contribution proposes the use of four transition points between the dormancy phases and their characterization in terms of carbohydrates, water contents in combination with chilling values and may allow upscaling to other dormancy studies in trees; two groups of cherry varieties were defined based on their different initial sorbitol and starch level in the autumn...
July 19, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28746554/phenological-characterization-and-temperature-requirements-of-annona-squamosa-l-in-the-brazilian-semiarid-region
#8
Débora S Mendes, Marlon C T Pereira, Silvia Nietsche, Joseilton F Silva, Josiele S Rocha, Athos H Mendes, Helisson R A Xavier, Rayane C Dos Santos
The phenological growth stages of various species of monocotyledonous and dicotyledonous plants can be uniformly coded using the Biologische Bundesanstalt, Bundessortenamt, und Chemische Industrie (BBCH) scale. The aim of the present study was to determine the duration of different phenological stages and the temperature requirements of the sugar-apple, Annona squamosa, during two crop cycles in the semiarid region of Brazil. Phenological stages were divided into eight of ten possible principal stages: (0) bud development, (1) leaf development, (3) shoot/branch development, (5) inflorescence emergence, (6) flowering, (7) fruit development, (8) fruit maturity and (9) senescence and the beginning of dormancy...
July 20, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28737248/frost-hardening-and-dehardening-potential-in-temperate-trees-from-winter-to-budburst
#9
Amarante Vitra, Armando Lenz, Yann Vitasse
We investigated how deciduous trees can adjust their freezing resistance in response to temperature during the progress of the ecodormancy phase, from midwinter to budburst. We regularly sampled twigs of four different temperate deciduous tree species from January to the leaf-out date. Using computer-controlled freezers and climate chambers, the freezing resistance of buds was measured directly after sampling and also after the application of artificial hardening and dehardening treatments, simulating cold and warm spells...
July 24, 2017: New Phytologist
https://www.readbyqxmd.com/read/28726096/identification-and-characterization-of-the-flower-meristem-identity-gene-mhylfy-in-mycoheterotrophic-plant-monotropa-hypopitys
#10
A V Shchennikova, O A Shulga, A V Beletsky, M A Filyushin, E Z Kochieva, N V Ravin, K G Skryabin
The gene encoding the transcription factor LEAFY was identified in the genome of the mycoheterotrophic plant, pinesap Monotropa hypopitys. In the transcriptomes of roots, bracts, and flowers of flowering pinesaps, the MhyLFY gene expression was absent. These data suggest the conservativeness of the LFY-dependent mechanism of flower meristem identity and flower formation in heterotrophic species with some differences associated to the specificity of development and the structure of such plants. The pinesap flowering under the control of the transcription factor MhyLFY may be initiated either in an embryonic inflorescence during spring dormancy release of adventitious root buds or in an inflorescence of a growing reproductive stem after photoperiodic induction...
May 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28710586/bud-sprouting-and-floral-induction-and-expression-of-ft-in-loquat-eriobotrya-japonica-thunb-lindl
#11
Carmina Reig, Francisco Gil-Muñoz, Francisco Vera-Sirera, Ana García-Lorca, Amparo Martínez-Fuentes, Carlos Mesejo, Miguel A Pérez-Amador, Manuel Agustí
EjFT1 and EjFT2 genes were isolated and sequenced from leaves of loquat. EjFT1 is involved in bud sprouting and leaf development, and EjFT2 in floral bud induction. Loquat [Eriobotrya japonica (Thunb.) Lindl.] is an evergreen species belonging to the family Rosaceae, such as apple and pear, whose reproductive development, in contrast with these species, is a continuous process that is not interrupted by winter dormancy. Thus, the study of the mechanism of flowering in loquat has the potential to uncover the environmental and genetic networks that trigger flowering more accurately, contributing for a better understanding of the Rosaceae floral process...
July 14, 2017: Planta
https://www.readbyqxmd.com/read/28707409/chilling-responsive-demeter-like-dna-demethylase-mediates-in-poplar-bud-break
#12
Daniel Conde, Anne-Laure Le Gac, Mariano Perales, Christopher Dervinis, Matias Kirst, Stéphane Maury, Pablo González-Melendi, Isabel Allona
Annual dormancy-growth cycle is a developmental and physiological process essential for the survival of deciduous trees in temperate and boreal forests. Seasonal control of shoot growth in woody perennials requires specific genetic programmes responding to environmental signals. The environmental-controlled mechanisms that regulate the shift between winter dormancy and the growth-promoting genetic programmes are still unknown. Here, we show that dynamics in genomic DNA methylation levels are involved in the regulation of dormancy-growth cycle in poplar...
October 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28680438/abscisic-acid-is-a-major-regulator-of-grape-berry-ripening-onset-new-insights-into-aba-signaling-network
#13
Stefania Pilati, Giorgia Bagagli, Paolo Sonego, Marco Moretto, Daniele Brazzale, Giulia Castorina, Laura Simoni, Chiara Tonelli, Graziano Guella, Kristof Engelen, Massimo Galbiati, Claudio Moser
Grapevine is a world-wide cultivated economically relevant crop. The process of berry ripening is non-climacteric and does not rely on the sole ethylene signal. Abscisic acid (ABA) is recognized as an important hormone of ripening inception and color development in ripening berries. In order to elucidate the effect of this signal at the molecular level, pre-véraison berries were treated ex vivo for 20 h with 0.2 mM ABA and berry skin transcriptional modulation was studied by RNA-seq after the treatment and 24 h later, in the absence of exogenous ABA...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28626038/phenology-of-perennial-native-grass-belowground-axillary-buds-in-the-northern-mixed-grass-prairie
#14
Morgan L Russell, Lance T Vermeire, Amy C Ganguli, John R Hendrickson
PREMISE OF THE STUDY: Vegetative reproduction from belowground bud banks is the primary driver of grassland systems. Despite the importance of bud banks, the timing of recruitment and the crucial link between formation and maintenance is unknown. METHODS: We assessed patterns of belowground bud development, dormancy, and mortality associated with three perennial native grasses in the northern Great Plains. Temperature and soil moisture were measured below the soil surface to determine relationships with belowground bud development...
June 16, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28600566/comparative-morphology-and-transcriptome-analysis-reveals-distinct-functions-of-the-primary-and-secondary-laticifer-cells-in-the-rubber-tree
#15
Deguan Tan, Xiaowen Hu, Lili Fu, Anuwat Kumpeangkeaw, Zehong Ding, Xuepiao Sun, Jiaming Zhang
Laticifers are highly specialized cells that synthesize and store natural rubber. Rubber trees (Hevea brasiliensis Muell. Arg.) contain both primary and secondary laticifers. Morphological and functional differences between the two types of laticifers are largely unknown, but such information is important for breeding and cultivation practices. Morphological comparison using paraffin sections revealed only distribution differences: the primary laticifers were distributed randomly, while the secondary laticifers were distributed in concentric rings...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28588590/a-conserved-carbon-starvation-response-underlies-bud-dormancy-in-woody-and-herbaceous-species
#16
Carlos Tarancón, Eduardo González-Grandío, Juan C Oliveros, Michael Nicolas, Pilar Cubas
Plant shoot systems give rise to characteristic above-ground plant architectures. Shoots are formed from axillary meristems and buds, whose growth and development is modulated by systemic and local signals. These cues convey information about nutrient and water availability, light quality, sink/source organ activity and other variables that determine the timeliness and competence to maintain development of new shoots. This information is translated into a local response, in meristems and buds, of growth or quiescence...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28586469/dormancy-associated-mads-box-dam-and-abscisic-acid-pathway-regulate-pear-endodormancy-through-a-feedback-mechanism
#17
Pham Anh Tuan, Songling Bai, Takanori Saito, Akiko Ito, Takaya Moriguchi
In the pear 'Kosui' (Pyrus pyrifolia Nakai), dormancy-associated MADS-box (PpDAM1 = PpMADS13-1) gene has been reported to play an essential role in bud endodormancy. Here, we found that PpDAM1 upregulated expression of 9-cis-epoxycarotenoid dioxygenase (PpNCED3), which is a rate-limiting gene for abscisic acid (ABA) biosynthesis. Transient assays with dual luciferase reporter system (LUC assay) and electrophoretic mobility shift assay (EMSA) showed that PpDAM1 activated PpNCED3 expression by binding to the CArG motif in the PpNCED3 promoter...
June 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28579998/aba-represses-the-expression-of-cell-cycle-genes-and-may-modulate-the-development-of-endodormancy-in-grapevine-buds
#18
Ricardo Vergara, Ximena Noriega, Karla Aravena, Humberto Prieto, Francisco J Pérez
Recently, the plant hormone abscisic acid (ABA) has been implicated as a key player in the regulation of endodormancy (ED) in grapevine buds (Vitis vinifera L). In this study, we show that in the vine, the expression of genes related to the biosynthesis of ABA (VvNCED1; VvNCED2) and the content of ABA are significantly higher in the latent bud than at the shoot apex, while the expression of an ABA catabolic gene (VvA8H3) showed no significant difference between either organ. A negative correlation between the content of ABA and transcript levels of cell cycle genes (CCG) was found in both tissues...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28579996/cyanogenic-glucosides-and-derivatives-in-almond-and-sweet-cherry-flower-buds-from-dormancy-to-flowering
#19
Jorge Del Cueto, Irina A Ionescu, Martina Pičmanová, Oliver Gericke, Mohammed S Motawia, Carl E Olsen, José A Campoy, Federico Dicenta, Birger L Møller, Raquel Sánchez-Pérez
Almond and sweet cherry are two economically important species of the Prunus genus. They both produce the cyanogenic glucosides prunasin and amygdalin. As part of a two-component defense system, prunasin and amygdalin release toxic hydrogen cyanide upon cell disruption. In this study, we investigated the potential role within prunasin and amygdalin and some of its derivatives in endodormancy release of these two Prunus species. The content of prunasin and of endogenous prunasin turnover products in the course of flower development was examined in five almond cultivars - differing from very early to extra-late in flowering time - and in one sweet early cherry cultivar...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28551285/insights-into-the-unique-torpor-of-botrylloides-leachi-a-colonial-urochordate
#20
Yosef Hyams, Guy Paz, Claudette Rabinowitz, Baruch Rinkevich
Rough environmental conditions make the survival of many multi-cellular organisms almost impossible, enforcing behavioral, morphological, physiological and reproductive rejoinders that can cope with harsh times and hostile environments, frequently through down-regulation of metabolism into basal states of dormancy, or torpor. This study examines one of the most unique torpor strategies seen within the phylum Chordata, exhibited by the colonial urochordate Botrylloides leachi, which enters a state of hibernation or aestivation in response to thermal stress, during which all of its functional colonial units (zooids) are entirely absorbed and the colony survives as small remnants of the vasculature, lacking both feeding and reproduction organs...
August 1, 2017: Developmental Biology
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