scholarly journals The Synchronized Efforts to Decipher the Molecular Basis for Soybean Maturity Loci E1, E2, and E3 That Regulate Flowering and Maturity

2021 ◽  
Vol 12 ◽  
Author(s):  
Zhengjun Xia ◽  
Hong Zhai ◽  
Hongyan Wu ◽  
Kun Xu ◽  
Satoshi Watanabe ◽  
...  
Keyword(s):  
Flowering Time ◽  
Molecular Basis ◽  
Gene Network ◽  
Genetic Factor ◽  
General Concept ◽  
Photoperiodic Induction ◽  
Centennial Celebration ◽  
Flowering Genes ◽  
Photoperiodic Responses ◽  
Molecular Bases

The general concept of photoperiodism, i.e., the photoperiodic induction of flowering, was established by Garner and Allard (1920). The genetic factor controlling flowering time, maturity, or photoperiodic responses was observed in soybean soon after the discovery of the photoperiodism. E1, E2, and E3 were named in 1971 and, thereafter, genetically characterized. At the centennial celebration of the discovery of photoperiodism in soybean, we recount our endeavors to successfully decipher the molecular bases for the major maturity loci E1, E2, and E3 in soybean. Through systematic efforts, we successfully cloned the E3 gene in 2009, the E2 gene in 2011, and the E1 gene in 2012. Recently, successful identification of several circadian-related genes such as PRR3a, LUX, and J has enriched the known major E1-FTs pathway. Further research progresses on the identification of new flowering and maturity-related genes as well as coordinated regulation between flowering genes will enable us to understand profoundly flowering gene network and determinants of latitudinal adaptation in soybean.

scholarly journals Ghd8 controls rice photoperiod sensitivity by forming a complex that interacts with Ghd7

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Peng Wang ◽  
Rong Gong ◽  
Ying Yang ◽  
Sibin Yu
Keyword(s):  
Flowering Time ◽  
Agronomic Traits ◽  
Genetic Interaction ◽  
Heading Date ◽  
Photoperiod Sensitivity ◽  
Yield Potential ◽  
Dependent Manner ◽  
Flowering Genes ◽  
Ccaat Box ◽  
Molecular Bases

Abstract Background Flowering time is one of the most important agronomic characteristics that ultimately determine yield potential and eco-geographical adaptation in crops. Ghd8 and Ghd7, two major flowering genes, have similar functions and large pleiotropic effects in controlling the heading date, plant height and grain yield of rice. However, these gene interactions at the genetic and molecular levels have not been determined to date. Results In this study, we investigated the genetic interaction between Ghd8 and Ghd7 by using a set of near-isogenic lines and a panel of natural germplasm accessions in rice. We found that Ghd8 affected multiple agronomic traits in a functional Ghd7-dependent manner. Both functional Ghd8 and Ghd7 are pivotal for rice photoperiod sensitivity controlled by Hd1 and Hd3a. GHD8 could form a heterotrimeric complex with HD1 and OsHAP5b to activate the transcription of Ghd7 by binding directly to the promoter region of Ghd7, which contains the CCAAT-box motif. Conclusions The results of this study help to elucidate the genetic and molecular bases of Ghd8 and Ghd7 interactions, indicating that Ghd8 acts upstream of Ghd7 to activate its transcription, which inhibits Hd3a expression and thus affects flowering time and rice adaptation.

scholarly journals Ghd8 controls rice photoperiod sensitivity by forming a complex that interacts with Ghd7

2019 ◽  
Author(s):  
Peng Wang ◽  
Rong Gong ◽  
Ying Yang ◽  
Sibin Yu
Keyword(s):  
Flowering Time ◽  
Agronomic Traits ◽  
Genetic Interaction ◽  
Heading Date ◽  
Photoperiod Sensitivity ◽  
Yield Potential ◽  
Dependent Manner ◽  
Flowering Genes ◽  
Ccaat Box ◽  
Molecular Bases

Abstract Background: Flowering time is one of the most important agronomic characteristics that ultimately determine yield potential and eco-geographical adaptation in crops. Ghd8 and Ghd7, two major flowering genes, have similar functions and large pleiotropic effects in controlling the heading date, plant height and grain yield of rice. However, these gene interactions at the genetic and molecular levels have not been determined to date. Results: In this study, we investigated the genetic interaction between Ghd8 and Ghd7 by using a set of near-isogenic lines and a panel of natural germplasm accessions in rice. We found that Ghd8 affected multiple agronomic traits in a functional Ghd7-dependent manner. Both functional Ghd8 and Ghd7 are pivotal for rice photoperiod sensitivity controlled by Hd1 and Hd3a. GHD8 could form a heterotrimeric complex with HD1 and OsHAP5b to activate the transcription of Ghd7 by binding directly to the promoter region of Ghd7, which contains the CCAAT-box motif. Conclusions: The results of this study help to elucidate the genetic and molecular bases of Ghd8 and Ghd7 interactions, indicating that Ghd8 acts upstream of Ghd7 to activate its transcription, which inhibits Hd3a expression and thus affects flowering time and rice adaptation.

scholarly journals Ghd8 regulates rice photosensitivity by forming a complex that interacts with Ghd7

2019 ◽  
Author(s):  
Peng Wang ◽  
Rong Gong ◽  
Ying Yang ◽  
Sibin Yu
Keyword(s):  
Flowering Time ◽  
Agronomic Traits ◽  
Genetic Interaction ◽  
Heading Date ◽  
Yield Potential ◽  
Dependent Manner ◽  
Near Isogenic Lines ◽  
Flowering Genes ◽  
Ccaat Box ◽  
Molecular Bases

Abstract Background: Flowering time is one of the most important agronomic characteristics that ultimately determine yield potential and eco-geographical adaptation in crops. Ghd8 and Ghd7, two major flowering genes, have similar functions and large pleiotropic effects in controlling the heading date, plant height and grain yield of rice. However, these genes interact at the genetic and molecular levels has not been determined to date. Results: In this study, we investigated the genetic interaction between Ghd8 and Ghd7 by using a set of near-isogenic lines and a panel of natural germplasm accessions in rice. We found that Ghd8 affected multiple agronomic traits in a functional Ghd7-dependent manner. Both functional Ghd8 and Ghd7 are pivotal for rice photosensitivity controlled by Hd1 and Hd3a. GHD8 could form a heterotrimeric complex with HD1 and OsHAP5b to activate the transcription of Ghd7 by binding directly to the promoter region of Ghd7, which contains the CCAAT-box motif. Conclusions: The results of this study help to elucidate the genetic and molecular bases of Ghd8 and Ghd7 interactions, indicating that Ghd8 acts upstream of Ghd7 to activate its transcription, which inhibits Hd3a expression and thus affects flowering time and rice adaptation.

scholarly journals Ghd8 controls rice photoperiod sensitivity by forming a complex that interacts with Ghd7

2019 ◽  
Author(s):  
Peng Wang ◽  
Rong Gong ◽  
Ying Yang ◽  
Sibin Yu
Keyword(s):  
Flowering Time ◽  
Agronomic Traits ◽  
Genetic Interaction ◽  
Heading Date ◽  
Photoperiod Sensitivity ◽  
Yield Potential ◽  
Dependent Manner ◽  
Flowering Genes ◽  
Ccaat Box ◽  
Molecular Bases

Abstract Background: Flowering time is one of the most important agronomic characteristics that ultimately determine yield potential and eco-geographical adaptation in crops. Ghd8 and Ghd7, two major flowering genes, have similar functions and large pleiotropic effects in controlling the heading date, plant height and grain yield of rice. However, these gene interactions at the genetic and molecular levels have not been determined to date. Results: In this study, we investigated the genetic interaction between Ghd8 and Ghd7 by using a set of near-isogenic lines and a panel of natural germplasm accessions in rice. We found that Ghd8 affected multiple agronomic traits in a functional Ghd7-dependent manner. Both functional Ghd8 and Ghd7 are pivotal for rice photoperiod sensitivity controlled by Hd1 and Hd3a. GHD8 could form a heterotrimeric complex with HD1 and OsHAP5b to activate the transcription of Ghd7 by binding directly to the promoter region of Ghd7, which contains the CCAAT-box motif. Conclusions: The results of this study help to elucidate the genetic and molecular bases of Ghd8 and Ghd7 interactions, indicating that Ghd8 acts upstream of Ghd7 to activate its transcription, which inhibits Hd3a expression and thus affects flowering time and rice adaptation.

Molecular bases of primary monogenic dyslipidemia

2020 ◽  
pp. 4-17
Author(s):  
О.Н. Иванова ◽  
П.А. Васильев ◽  
Е.Ю. Захарова
Keyword(s):  
Lipid Profile ◽  
Molecular Basis ◽  
Clinical Characteristics ◽  
Metabolic Disorders ◽  
Low Density Lipoproteins ◽  
Accurate Diagnosis ◽  
High Density Lipoproteins ◽  
Extreme Deviation ◽  
Low Levels ◽  
Molecular Bases

Дислипидемия - одно из наиболее распространенных метаболических нарушений, доминирующий фактор риска заболеваний сердечно-сосудистой системы. Своевременная диагностика и корректировка липидного профиля могут заметно снизить заболеваемость и смертность от сердечно-сосудистых заболеваний. Обширная гетерогенная группа заболеваний приводит к устойчивым изменениям липидного профиля. Предлагаемый обзор включает в себя описание метаболизма липидов, молекулярных основ и клинических характеристик первичных моногенных дислипидемий. Мутации двадцати пяти генов являются причиной большинства моногенных дислипидемий. На основании изменений липидного профиля выделяют пять групп фенотипов с экстремальным отклонением уровней маркеров липидного профиля: с высоким и низким уровнем липопротеинов низкой плотности, с высоким и низким уровнем липопротеинов высокой плотности, с высоким уровнем триглицеридов. Для каждого фенотипа обозначены ассоциированные гены, указан ген с чаще всего выявляемыми мутациями. Подробно описаны молекулярные основы наиболее распространенной дислипидемии, характеризующейся существенным повышением уровня липопротеинов низкой плотности - семейной гиперхолестеринемии. Генетическое тестирование пациентов с дислипидемией дает возможность постановки точного диагноза, каскадного обследования и консультирования членов семьи пациента, ранней диагностики для предотвращения или более позднего проявления осложнений. Dyslipidemia is one of the most common metabolic disorders, the dominant risk factor for diseases of the cardiovascular system. Timely diagnosis and correction of the lipid profile can significantly reduce morbidity and mortality from cardiovascular diseases. An extensive heterogeneous group of diseases leads to persistent changes in the lipid profile. This review includes a description of lipid metabolism, the molecular basis, and clinical characteristics of primary monogenic dyslipidemia. Mutations in twenty-five genes are responsible for most monogenic dyslipidemias. On the basis of changes in the lipid profile, five groups of phenotypes are distinguished with extreme deviation in the levels of lipid profile markers: with high and low levels of low density lipoproteins, with high and low levels of high density lipoproteins, with high levels of triglycerides. For each phenotype, the associated genes are indicated, the gene with the most frequently detected mutations is indicated. The molecular basis of the most common dyslipidemia, familial hypercholesterolemia, is described in detail. Genetic testing of patients with dyslipidemia makes it possible to make an accurate diagnosis, the possibility of cascade examination and counseling of the patient’s family members, the possibility of early diagnosis to prevent or later manifest complications.

scholarly journals Role of PIF4 and FLC in controlling flowering time under daily variable temperature profile

2020 ◽  
Author(s):  
Jutapak Jenkitkonchai ◽  
Poppy Marriott ◽  
Weibing Yang ◽  
Napaporn Sriden ◽  
Jae-Hoon Jung ◽  
...  
Keyword(s):  
Flowering Time ◽  
Molecular Mechanisms ◽  
Transcriptional Regulatory Network ◽  
Variable Temperature ◽  
Loss Of Function ◽  
Environmental Signals ◽  
Regulatory Interactions ◽  
Flowering Genes ◽  
Gene Regulatory ◽  
Flowering Locus

ABSTRACTInitiation of flowering is a crucial developmental event that requires both internal and environmental signals to determine when floral transition should occur to maximize reproductive success. Ambient temperature is one of the key environmental signals that highly influence flowering time, not only seasonally but also in the context of drastic temperature fluctuation due to global warming. Molecular mechanisms of how high or low constant temperatures affect the flowering time have been largely characterized in the model plant Arabidopsis thaliana; however, the effect of natural daily variable temperature outside laboratories is only partly explored. Several groups of flowering genes have been shown to play important roles in temperature responses, including two temperature-responsive transcription factors (TFs), namely PHYTOCHROME INTERACTING FACTOR 4 (PIF4) and FLOWERING LOCUS C (FLC), that act antagonistically to regulate flowering time by activating or repressing floral integrator FLOWERING LOCUS T (FT). In this study, we have demonstrated that the daily variable temperature (VAR) causes early flowering in both natural accessions Col-0, C24 and their late flowering hybrid C24xCol, which carries both functional floral repressor FLC and its activator FRIGIDA (FRI), as compared to a constant temperature (CON). The loss-of-function mutation of PIF4 exhibits later flowering in VAR, suggesting that PIF4 at least in part, contributes to acceleration of flowering in response to the daily variable temperature. We find that VAR increases PIF4 transcription at the end of the day when temperature peaks at 32 °C. The FT transcription is also elevated in VAR, as compared to CON, in agreement with earlier flowering observed in VAR. In addition, VAR causes a decrease in FLC transcription in 4-week-old plants, and we further show that overexpression of PIF4 can reduce FLC transcription, suggesting that PIF4 might also regulate FT indirectly through the repression of FLC. To further conceptualize an overall model of gene regulatory mechanisms involving PIF4 and FLC in controlling flowering in response to temperature changes, we construct a co-expression – transcriptional regulatory network by combining publicly available transcriptomic data and gene regulatory interactions of our flowering genes of interest and their partners. The network model reveals the conserved and tissue-specific regulatory functions of 62 flowering-time-relating genes, namely PIF4, PIF5, FLC, ELF3 and their immediate neighboring genes, which can be useful for confirming and predicting the functions and regulatory interactions between the key flowering genes.

scholarly journals Plasma Membrane Phylloquinone Biosynthesis in Nonphotosynthetic Parasitic Plants

2018 ◽  
Author(s):  
Xi Gu ◽  
Ing-Gin Chen ◽  
Scott A. Harding ◽  
Batbayar Nyamdari ◽  
Maria A. Ortega ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Electron Transport ◽  
Molecular Basis ◽  
Gene Network ◽  
Parasitic Plants ◽  
Disulfide Bridge ◽  
Plasma Membrane Electron Transport ◽  
Genes Encoding ◽  
Noncanonical Pathway ◽  
Gene Network Analysis

AbstractPhylloquinone is a lipophilic naphthoquinone found predominantly in chloroplasts and best known for its function in photosystem I electron transport and disulfide bridge formation of photosystem II subunits. Phylloquinone has also been detected in plasma membrane preparations of heterotrophic tissues with potential transmembrane redox function, but the molecular basis for this noncanonical pathway is unknown. Here we provide evidence of plasma membrane phylloquinone biosynthesis in a nonphotosynthetic holoparasite Phelipanche aegyptiaca. A nonphotosynthetic and nonplastidial role for phylloquinone is supported by transcription of phylloquinone biosynthetic genes during seed germination and haustorium development, by plasma membrane-localization of alternative terminal enzymes, and by detection of phylloquinone in germinated seeds. Comparative gene network analysis with photosynthetically competent parasites revealed a bias of Phelipanche phylloquinone genes toward coexpression with oxidoreductases involved in plasma membrane electron transport. Genes encoding the plasma membrane phylloquinone pathway are also present in several photoautotrophic taxa of Asterids, suggesting an ancient origin of multifunctionality. Our findings suggest that nonphotosynthetic holoparasites exploit alternative targeting of phylloquinone for transmembrane redox signaling associated with parasitism.

Application of Photoperiodic Manipulation in Vegetative Specialty Floral Crop Propagation and Flowering

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 554d-554
Author(s):  
Millie S. Williams ◽  
Terri Woods Starman
Keyword(s):  
Flowering Time ◽  
Flower Development ◽  
Vegetative Growth ◽  
Plant Production ◽  
Flower Initiation ◽  
Stock Plant ◽  
Flower Number ◽  
Open Flower ◽  
Long Day ◽  
Photoperiodic Responses

Photoperiod requirements are important for optimum flower development, decreasing production time, year-round flowering, and/or for increasing vegetative growth necessary in stock plant production. The photoperiodic responses were determined for 24 vegetatively propagated specialty floral crops. Each plant species was grown at 8-, 10-, 12-, 14-, and 16-h photoperiods. Photoperiods were provided by 8 h of sunlight, then pulling black cloth and providing daylength extension with incandescent bulbs. Data collected included time to flower, flower number, and vegetative characteristics. Evolvulus nuttallianus `Blue Daze', Heliotropium arborescens `Fragrant Delight', and Orthosiphon stamineus `Lavender' were facultative short-day plants with respect to flowering. Time to flower increased as photoperiod increased. Duranta repens `Blue', Verbena hybrid `Tapien Lavender', and Verbena peruviana `Trailing Katie' were facultative long day plants with respect to flowering. Days to visible bud and first open flower decreased as photoperiod increased. Argeranthemum frutescens `Sugar Baby', Scaevola aemula `Fancy Fan Falls', and Portulaca hybrid `Apricot' had increased flower number as photoperiod increased from 8- to 16-h, although time to first flower initiation was not affected. Abutilon hybrid `Apricot', Duranta repens `Blue', Evolvulus nuttallianus `Blue Daze', Lotus berthelotii `Parrot's Beak', Lysimachia nummularia `Aurea Creeping Golden', Rhodanthe anthemoides `Milkyway', and Scaevola aemula `Fancy Fan Falls' had increased vegetative growth as photoperiod increased. All other species studied were day-neutral with regard to flowering and vegetative parameters.

scholarly journals Plasma Membrane Phylloquinone Biosynthesis in Nonphotosynthetic Parasitic Plants

2021 ◽  
Author(s):  
Xi Gu ◽  
Ing-Gin Chen ◽  
Scott A Harding ◽  
Batbayar Nyamdari ◽  
Maria A Ortega ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Electron Transport ◽  
Molecular Basis ◽  
Gene Network ◽  
Parasitic Plants ◽  
Disulfide Bridge ◽  
Plasma Membrane Electron Transport ◽  
Genes Encoding ◽  
Noncanonical Pathway ◽  
Gene Network Analysis

Abstract Phylloquinone is a lipophilic naphthoquinone found predominantly in chloroplasts and best known for its function in photosystem I electron transport and disulfide bridge formation of photosystem II subunits. Phylloquinone has also been detected in plasma membrane preparations of heterotrophic tissues with potential transmembrane redox function, but the molecular basis for this noncanonical pathway is unknown. Here we provide evidence of plasma membrane phylloquinone biosynthesis in a nonphotosynthetic holoparasite Phelipanche aegyptiaca. A nonphotosynthetic and nonplastidial role for phylloquinone is supported by transcription of phylloquinone biosynthetic genes during seed germination and haustorium development, by plasma membrane-localization of alternative terminal enzymes, and by detection of phylloquinone in germinated seeds. Comparative gene network analysis with photosynthetically competent parasites revealed a bias of P. aegyptiaca phylloquinone genes toward coexpression with oxidoreductases involved in plasma membrane electron transport. Genes encoding the plasma membrane phylloquinone pathway are also present in several photoautotrophic taxa of Asterids, suggesting an ancient origin of multifunctionality. Our findings suggest that nonphotosynthetic holoparasites exploit alternative targeting of phylloquinone for transmembrane redox signaling associated with parasitism.

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