scholarly journals The long-term epidemic of Claviceps purpurea on Spartina anglica in Poole Harbour: pattern of infection, effects on seed production and the role of Fusarium heterosporum

1998 ◽  
Vol 138 (3) ◽  
pp. 497-505 ◽  
Author(s):  
A. F. RAYBOULD ◽  
A. J. GRAY ◽  
R. T. CLARKE
Keyword(s):  
Seed Production ◽  
Claviceps Purpurea ◽  
Spartina Anglica ◽  
Fusarium Heterosporum

Inhibition of conidial germination by Claviceps purpurea honeydew fluid

1976 ◽  
Vol 54 (22) ◽  
pp. 2541-2545 ◽  
Author(s):  
Barry M. Cunfer
Keyword(s):  
Water Potential ◽  
Inhibitory Activity ◽  
Conidial Germination ◽  
Biocontrol Agents ◽  
Claviceps Purpurea ◽  
Sensitive Test ◽  
Fusarium Heterosporum

Claviceps purpurea honeydew contains a factor(s) which inhibits conidial germination of some fungi. Filters-sterilized honeydew fluid inhibits germination, whereas washed C. purpurea conidia do not. Conidia of Fusarium heterosporum, which colonizes honeydew and prevents the formation of sclerotia on ergot-infected cereals, were not affected by the inhibitor(s). Fungi found unable to colonize the honeydew stage of C. purpurea on barley were sensitive to the inhibitor(s).Honeydew fluid at −30 bar water potential can be diluted 4–8 times without loss of inhibitory activity. The inhibitor(s) was both fungicidal and fungistatic against sensitive test isolates. Honeydew fluid retained its inhibitory activity when heated at 100 °C for 15 min but not after 30 min heating or after autoclaving. The role of the inhibitor(s) in the life of C. purpurea and its possible use for identification of biocontrol agents are discussed.

scholarly journals Fire history and weather interact to determine extent and synchrony of mast-seeding in rhizomatous scrub oaks of Florida

2021 ◽  
Vol 376 (1839) ◽  
Author(s):  
Mario B. Pesendorfer ◽  
Reed Bowman ◽  
Georg Gratzer ◽  
Shane Pruett ◽  
Angela Tringali ◽  
...  
Keyword(s):  
Seed Production ◽  
Reproductive Strategies ◽  
Fire History ◽  
Interactive Effects ◽  
Mast Seeding ◽  
Florida Scrub ◽  
Acorn Production ◽  
South Central

In disturbance-prone ecosystems, fitness consequences of plant reproductive strategies are often determined by the relative timing of seed production and disturbance events, but the role of disturbances as proximate drivers of seed production has been overlooked. We use long-term data on seed production in Quercus chapmanii , Q. geminata and Q. inopina , rhizomatous oaks found in south central Florida's oak scrub, to investigate the role of fire history and its interaction with weather in shaping acorn production and its synchrony . Acorn production increased with the time since last fire, combined with additive or interactive effects of spring precipitation (+) or drought (–). Furthermore, multiple matrix regression models revealed that ramet pairs with shared fire history were more synchronous in seed production than ones that burned in different years. Long-term trends suggest that increasingly drier spring weather, in interaction with fire frequency, may drive a decline of seed production. Such declines could affect the community of acorn-reliant vertebrates in the Florida scrub, including endangered Florida scrub-jays ( Aphelocoma coerulescens ). These results illustrate that fire can function as a proximate driver of seed production in mast-seeding species, highlighting the increasingly recognized importance of interactions among reproductive strategies and disturbance regimes in structuring plant populations and communities. This article is part of the theme issue ‘The ecology and evolution of synchronized seed production in plants’.

Abusive head trauma (AHT) outcome at long-term follow-up and the role of elective neurosurgical approach: A report of 22 cases

2013 ◽  
Author(s):  
Francesca Menegazzo ◽  
Melissa Rosa Rizzotto ◽  
Martina Bua ◽  
Luisa Pinello ◽  
Elisabetta Tono ◽  
...  
Keyword(s):  
Head Trauma ◽  
Abusive Head Trauma ◽  
Long Term Follow Up

The Second Start of Transformation in Ukraine?

2014 ◽  
pp. 30-52 ◽  
Author(s):  
L. Grigoryev ◽  
E. Buryak ◽  
A. Golyashev
Keyword(s):  
Economic Growth ◽  
Armed Conflict ◽  
Political Crisis ◽  
Investment Climate ◽  
Institutional Reforms ◽  
Personal Consumption ◽  
Governance Quality ◽  
Political Turmoil

The Ukrainian socio-economic crisis has been developing for years and resulted in the open socio-political turmoil and armed conflict. The Ukrainian population didn’t meet objectives of the post-Soviet transformation, and people were disillusioned for years, losing trust in the state and the Future. The role of workers’ remittances in the Ukrainian economy is underestimated, since the personal consumption and stability depend strongly on them. Social inequality, oligarchic control of key national assets contributed to instability as well as regional disparity, aggravated by identity differences. Economic growth is slow due to a long-term underinvestment, and prospects of improvement are dependent on some difficult institutional reforms, macro stability, open external markets and the elites’ consensus. Recovering after socio-economic and political crisis will need not merely time, but also governance quality improvement, institutions reform, the investment climate revival - that can be attributed as the second transformation in Ukraine.

Thoughts on the Long-Term Strategy, Science and Democracy

2006 ◽  
pp. 4-19 ◽  
Author(s):  
L. Abalkin
Keyword(s):  
Strategy Development ◽  
Russian Science ◽  
Global Trends ◽  
The World ◽  
World Development ◽  
Crucial Condition

The article covers unified issues of the long-term strategy development, the role of science as well as democracy development in present-day Russia. The problems of budget proficit, the Stabilization Fund issues, implementation of the adopted national projects, an increasing role of regions in strengthening the integrity and prosperity of the country are analyzed. The author reveals that the protection of businessmen and citizens from the all-embracing power of bureaucrats is the crucial condition of democratization of the society. Global trends of the world development and expert functions of the Russian science are presented as well.

Development of Social and Economic Forecasting and Ideas of A. Anchishkin

2013 ◽  
pp. 143-155
Author(s):  
A. Klepach ◽  
G. Kuranov
Keyword(s):  
Economic Planning ◽  
Special Role ◽  
Economic Management ◽  
Economic Forecasting ◽  
Russian Economy ◽  
World Economic ◽  
Long Term Forecasting ◽  
Working Out

The role of the prominent Soviet economist, academician A. Anchishkin (1933—1987), whose 80th birth anniversary we celebrate this year, in the development of ideas and formation of economic forecasting in the country at the time when the directive planning acted as a leading tool of economic management is explored in the article. Besides, Anchishkin’s special role is noted in developing a comprehensive program of scientific and technical progress, an information basis for working out long-term forecasts of the country’s development, moreover, his contribution to the creation of long-term forecasting methodology and improvement of the statistical basis for economic analysis and economic planning. The authors show that social and economic forecasting in the period after 1991, which has undertaken a number of functions of economic planning, has largely relied on further development of Anchishkin’s ideas, at the same time responding to new challenges for the Russian economy development during its entry into the world economic system.

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