Seasonal dynamics of the pink root fungus ( Setophoma terrestris ) in rhizosphere soil: Effect of crop species and rotation

2021 ◽  
Author(s):  
Naoto Yoshida
Keyword(s):  
Seasonal Dynamics ◽  
Rhizosphere Soil ◽  
Crop Species ◽  
Setophoma Terrestris

scholarly journals Comparison of phenological traits, growth patterns, and seasonal dynamics of non-structural carbohydrate in Mediterranean tree crop species

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aude Tixier ◽  
Paula Guzmán-Delgado ◽  
Or Sperling ◽  
Adele Amico Roxas ◽  
Emilio Laca ◽  
...  
Keyword(s):  
Seasonal Dynamics ◽  
Growth Patterns ◽  
Crop Species ◽  
Tree Crop ◽  
Structural Carbohydrate

scholarly journals Rhizosphere Competence of Pythium oligandrum

1997 ◽  
Vol 87 (9) ◽  
pp. 951-959 ◽  
Author(s):  
A. K. Al-Rawahi ◽  
J. G. Hancock
Keyword(s):  
Rhizosphere Soil ◽  
Mineral Soil ◽  
Pythium Oligandrum ◽  
Delivery Methods ◽  
Crop Species ◽  
Root Cortex ◽  
Tomato Plants ◽  
Rhizosphere Population ◽  
Rhizosphere Competence ◽  
Soil Rhizosphere

The associations of Pythium oligandrum with the root cortex, rhizoplane, and rhizosphere were measured with 11 crop species. This work was expedited by the use of a semiselective technique for isolation of P. oligandrum from soil and plant material. Cortical colonization of roots by P. oligandrum was not detected, and the rhizoplanes of the roots of most crops were free of the fungus. However, P. oligandrum was detected in large quantities with every crop tested when roots with adhering soil (rhizosphere soil) were assayed. Different crop species and cultivars of cantaloupe, cauliflower, and tomato varied in rhizosphere densities of P. oligandrum, but rhizosphere population densities of the fungus were consistently higher than in nonrhizosphere soils with plants grown in P. oligandrum-infested sterilized potting mix or an unsterilized mineral soil. After transplanting tomatoes into potting mix infested with P. oligandrum, increases in CFU occurred over time in the rhizosphere but not in the nonrhizosphere soil. In trials on delivery methods of inoculum of P. oligandrum, the rhizosphere populations of tomato plants grown in potting mix were about sixfold higher compared to seed-coat treatments when ground, alginate pelleted oospores were applied to seedlings growing in plug containers prior to transplanting or to pots containing potting mix before direct seeding.

Patterns of late-season photosynthate movement in sugar maple saplings

2009 ◽  
Vol 39 (12) ◽  
pp. 2294-2298 ◽  
Author(s):  
Michael E. Horowitz ◽  
Timothy J. Fahey ◽  
Joseph B. Yavitt ◽  
Ted R. Feldpausch ◽  
Ruth E. Sherman
Keyword(s):  
Seasonal Dynamics ◽  
Acer Saccharum ◽  
Sugar Maple ◽  
Rhizosphere Soil ◽  
Fine Root ◽  
Carbon Allocation ◽  
Late Season ◽  
High Enrichment ◽  
Very High

A more detailed understanding of seasonal dynamics of carbon allocation between roots and shoots of temperate zone trees is needed. We labeled sapling stands of sugar maple ( Acer saccharum Marsh) with 13CO2 in four 3 m diameter chambers during a 3 week interval in September 2006 and traced the movement of this 13C pulse through trees and soil during autumn and spring. High enrichment of 13C in foliage was achieved (δ13C = 387‰ ± 16‰). Late-season photosynthate was strongly mobilized during leaf senescence and stored in twigs, wood, and roots. Very high 13C enrichment of soil CO2 emissions at this time (δ13C = 766‰ ± 82‰) indicated the role of late-season photosynthesis in supplying root metabolism after the growing season. Rhizosphere soil was weakly enriched in 13C during fall, and increased significantly over the winter. Earthworms were highly enriched in fall, indicating that they consumed roots. In spring, 13C was strongly mobilized to growing shoots but not to growing fine roots; apparently, fine root growth in spring was not supplied by late-season stored photosynthate. These results provide insights into the seasonal dynamics of temperate tree carbon allocation with implications for disruption of these dynamics by global warming.

Seasonal dynamics of climatic indices as one of the manifestation factors of pyrogenic phenomena on the territory of Lugansk region

2014 ◽  
Vol 25 (1-2) ◽  
pp. 101-107
Author(s):  
I. A. Tarakhkalo
Keyword(s):  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Service Firms ◽  
Climatic Indices ◽  
Specific Influence

The analysis on the effects of pyrogenic Lugansk region for the period from 2001 to 2005 was conducted using the service «FIRMS». Established seasonal dynamics of pyrogenic phenomena and specific influence of climatic factors on the pyrogenic effects in the Luhansk region.

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