Fleurs pléiomères et synanthie chez Hyacinthus orientalis

1969 ◽  
Vol 47 (6) ◽  
pp. 885-895
Author(s):  
Joachim Vieth
Keyword(s):  
Hyacinthus Orientalis ◽  
Postgenital Fusion

A score of pleiomerous flowers of Hyacinthus orientalis L. are described. About a quarter of these unquestionably result from synanthy. Morphology shows that, in some of the specimens, synanthy is caused by ontogenetic (postgenital) fusion. If a similar origin is admitted for certain nearly normal specimens encountered in this study, it would be another indication that the end product of synanthy may be an entity simulating a simple flower.

scholarly journals First Report of Dickeya solani Causing Soft Rot in Imported Bulbs of Hyacinthus orientalis in China

Plant Disease ◽  
2015 ◽  
Vol 99 (1) ◽  
pp. 155-155 ◽  
Author(s):  
X. F. Chen ◽  
H. L. Zhang ◽  
J. Chen
Keyword(s):  
16S Rrna ◽  
The Netherlands ◽  
Bacterial Pathogen ◽  
Soft Rot ◽  
Potato Production ◽  
Sterile Water ◽  
First Report ◽  
Hyacinthus Orientalis ◽  
Dickeya Solani ◽  
Negative Controls

A bacterial pathogen, Dickeya solani, emerged as a major threat to potato (Solanum tuberosum) production in Europe in 2004 and has spread to many potato-growing regions via international trade. In December 2013, soft rot symptoms were observed in hyacinth (Hyacinthus orientalis) bulbs imported from the Netherlands into China at Ningbo Port. Diseased bulbs gave off an offensive odor. The base and internal parts of diseased bulbs rotted, and the margins of diseased tissues showed brown discoloration. Isolation on nutrient agar glucose (NAG) medium resulted in dominating colonies of characteristic “fried egg” morphology (1). One colony was chosen for further investigation and tentatively named “isolate 6165-3.” Under microscopic visualization after gram stain, the cells of isolate 6165-3 were gram-negative, motile, and rod shaped. The isolate was then identified as a member of genus Dickeya using the Biolog GN microplate. The 16S rRNA, recA, and dnaX sequences of isolate 6165-3 were subsequently determined and deposited in GenBank with accession numbers KM405240, KM405241, and KM405242, sharing 99% (16S rRNA), 100% (recA), and 100% (dnaX) nucleotide identity with those of known D. solani isolates, respectively. By this means, the isolate 6165-3 was identified as D. solani (1,2). To confirm the pathogenicity of the isolate, four plants each of 30-day-old hyacinth, 14-day-old potato, and 60-day-old moth orchid (Phalaenopsis amabilis) were inoculated with suspensions of the isolate with a concentration of 108 CFU/ml in sterile water by stabbing. Plants were incubated in a climate chamber at 28°C during the day and 24°C during the night with a relative humidity of 93% and a photoperiod of 12/12 h. Plants inoculated with sterile water were included as negative controls. After 2 or 3 days, typical symptoms such as water-soaked lesions and soft rot developed around the inoculation point, while the negative controls remained symptomless. Koch's postulates were fulfilled by re-isolating bacteria from lesions, which had identical sequence and morphology characters with the inoculated isolate. This is the first report of intercepted D. solani on hyacinth bulbs imported from the Netherlands into China, indicating that D. solani can spread via hyacinth. Further spread of the pathogen into potato production might lead to immeasurable economic consequences for China. References: (1) P. F. Sarris et al. New Dis. Rep. 24:21, 2011. (2) J. M. van der Wolf et al. Int. J. Syst. Evol. Microbiol. 64:768, 2014.

scholarly journals Autoradiographic studies of DNA and histone synthesis in successive differentiation stages of pollen grain in Hyacinthus orientalis L.

2014 ◽  
Vol 50 (3) ◽  
pp. 367-380 ◽  
Author(s):  
Elżbieta Bednarska
Keyword(s):  
Dna Replication ◽  
Dna Synthesis ◽  
Vegetative Cell ◽  
Developmental Stages ◽  
Generative Cell ◽  
Pollen Grain ◽  
Cell Nuclei ◽  
Hyacinthus Orientalis ◽  
Histone Synthesis ◽  
Generative Cells

DNA and histone synthesis in five consecutive morphological stages of <em>Hyacinthus orientalis</em> L. pollen grain differentiation were studied autoradiographically. DNA synthesis was found to occur in both the generative and the vegetative cell. DNA replication in the generative cell took place when the generative cell was still adhered to the pollen grain wall but already devoid of callose wall. DNA synthesis in the generative cell slightly preceded that in the vegetative cell. Histones were synthesized in phase S of the generative and vegetative cell. In the generative cell histone synthesis also continued at a lower level after completion of DNA replication. In the developmental stages under study the nuclei of the generative cells were decidedly richer in lysine histones than vegetative cell nuclei.

scholarly journals snRNP: Rich Nuclear Bodies inHyacinthus orientalisL. Microspores and Developing Pollen Cells

2009 ◽  
Vol 2009 ◽  
pp. 1-12 ◽  
Author(s):  
K. Zienkiewicz ◽  
E. Bednarska
Keyword(s):  
Pollen Development ◽  
Rna Synthesis ◽  
Generative Cell ◽  
Pollen Grains ◽  
Strong Relationship ◽  
Nuclear Bodies ◽  
Cajal Body ◽  
Sm Proteins ◽  
Hyacinthus Orientalis

The aim of the present work was the characterization of nuclear bodies in the microspore and developing pollen cells ofHyacinthus orientalisL.. The combination of Ag-NOR, immunofluorescence and immunogold techniques was used in this study. The obtained results showed the presence of highly agyrophylic extranucleolar bodies in microspore and developing pollen cells, which were finally identified as Cajal bodies. In all cases, a strong accumulation of snRNP-indicating molecules including TMG cap, Sm proteins and U2 snRNA, was observed in the examined nuclear bodies. In contrast to their number the size of the identified structures did not change significantly during pollen development. In the microspore and the vegetative cell of pollen grains CBs were more numerous than in the generative cell. At later stages of pollen development, a drastic decrease in CB number was observed and, just before anthesis, a complete lack of these structures was indicated in both pollen nuclei. On the basis of these results, as well as our previous studies, we postulate a strong relationship between Cajal body numbers and the levels of RNA synthesis and splicing machinery elements in microspore and developing pollen cells.

Erwinia rhapontici. [Distribution map].

1996 ◽  
Author(s):  
Keyword(s):  
North America ◽  
North Dakota ◽  
Geographical Distribution ◽  
Allium Cepa ◽  
Distribution Map ◽  
Rheum Rhaponticum ◽  
Hyacinthus Orientalis ◽  
Erwinia Rhapontici ◽  
New Distribution

Abstract A new distribution map is provided for Erwinia rhapontici (Millard) Burkholder. Hosts: Rhubarb (Rheum rhaponticum), wheat (Triticum), Hyacinthus orientalis and Allium cepa bulbs, occasionally others. Information is given on the geographical distribution in Asia, Iran, Israel, Japan, Korea, Malaysia, Peninsular, Europe, Belgium, France, Italy, Sardinia, Netherlands, Poland, UK, England, Wales, Ukraine, North America, Canada, Alberta, USA, Oklahoma, North Dakota, ID.

Dickeya solani. [Distribution map].

2015 ◽  
Author(s):  
Keyword(s):  
Solanum Tuberosum ◽  
Geographical Distribution ◽  
Republic Of Georgia ◽  
Distribution Map ◽  
Central Russia ◽  
Southern Russia ◽  
Hyacinthus Orientalis ◽  
Dickeya Solani ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Dickeya solani van der Wolf et al. Gammaproteobacteria: Enterobacteriales: Enterobacteriaceae. Hosts: potato (Solanum tuberosum) and hyacinth (Hyacinthus orientalis). Information is given on the geographical distribution in Europe (Belgium, Denmark, Finland, France, Germany, Greece, Crete, Netherlands, Poland, Russia, Central Russia, Southern Russia, Spain, Sweden, Switzerland, UK, Channel Islands, England and Wales and Scotland) and Asia (Republic of Georgia and Israel).

Embellisia hyacinthi. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
J. C. David
Keyword(s):  
North America ◽  
The Netherlands ◽  
Geographical Distribution ◽  
Plant Debris ◽  
Skin Spot ◽  
Scilla Sibirica ◽  
Hyacinthus Orientalis

Abstract A description is provided for Embellisia hyacinthi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Hyacinthus orientalis, Freesia refracta, Scilla sibirica, Muscari sp. DISEASE: Skin spot of bulbs. Leaf lesions also occur as spots. above which the leaves yellow and die. GEOGRAPHICAL DISTRIBUTION: Europe: Germany, The Netherlands, UK. North America: USA. TRANSMISSION: The fungus overwinters in the plant debris, soil and infected bulbs.

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